1. Overview
This chapter presents the main results of the analysis of the taxation of labour income across OECD member countries in 2020. Most emphasis is given to the tax wedge – a measure of the difference between labour costs to the employer and the corresponding net take-home pay of the employee – which is calculated by expressing the sum of personal income tax, employee plus employer social security contributions together with any payroll tax, minus benefits as a percentage of labour costs. The calculations also focus on the net personal average tax rate. This is the term used when the personal income tax and employee social security contributions net of cash benefits are expressed as a percentage of gross wage earnings. The analysis focuses on the single worker, with no children, at average earnings and makes a comparison with the single earner married couple with two children, at the same income level. A complementary analysis focuses on the two earner couple with two children, where one spouse earns the average wage and the other 67% of it.
This Report provides unique information for each of the 37 OECD countries on the income taxes paid by workers, their social security contributions, the transfers they receive in the form of cash benefits, as well as the social security contributions and payroll taxes paid by their employers. Results reported include the marginal and average tax burden for one- and two-earner households1, and the implied total labour costs for employers. These data are widely used in academic research and in the formulation and evaluation of social and economic policies. The taxpayer-specific detail in this Report complements the information provided annually in Revenue Statistics, a publication providing internationally comparative data on tax levels and tax structures in OECD countries. The methodology followed in this Report is described briefly in the introduction section below and in more detail in the Annex.
The tables and charts present estimates of tax burdens and of the tax ‘wedge’ between labour costs and net take-home pay for eight illustrative household types on comparable levels of income. The key results for 2020 are summarised in the second section below. Part I of the Report presents more detailed results for 2020, together with comparable results for 2019 and discusses the changes between the two years. Part I of the Report also reviews historical changes in tax burdens between 2000 and 2020.
The present chapter 1 begins with an introduction to the Taxing Wages methodology that is followed by a review of the results of tax burden indicators for 2020. The review includes the tax wedge and the personal average tax rates results for a single worker, without children, earning the average wage, and also the corresponding indicators for a one-earner couple at the average wage level and a two-earner couple where one spouse earns the average wage and the other 67% of it, and assumes that both couples have two children. Finally, the chapter ends with a section on the change in the average wage levels by country and the industry classification on which they are based.
The report covers the period of crisis related to the COVID-19 pandemic. We pay particular attention to the changes made to tax and benefit systems in response to the pandemic. Only measures that are relevant for the Taxing Wages publication are considered. In particular, these measures are changes in personal income tax (central and local/state levels), social security contributions, payroll taxes and cash benefits paid to workers. Consistent with the approach in Taxing Wages, these measures must affect the majority of full-time workers that are covered within the sectors B to N in ISIC rev 4. Further detailed information on the methodology is given in the Special Feature. Furthermore, detailed information on the COVID-19 related measures are given within the country chapters in the Part II of the report.
This section briefly introduces the methodology employed for Taxing Wages, which focuses on full-time employees. It is assumed that their annual income from employment is equal to a given percentage of the average full-time adult gross wage earnings for each OECD economy, referred to as the average wage (AW). This covers both manual and non-manual workers for either industry sectors C-K inclusive with reference to the International Standard Industrial Classification of All Economic Activities, Revision 3 (ISIC Rev.3) or industry sectors B-N inclusive with reference to the International Standard Industrial Classification of All Economic Activities, Revision 4 (ISIC Rev.4).2 Further details are provided in Table 1.8 as well as in the Annex of this Report. Additional assumptions are made about the personal circumstances of these wage earners in order to determine their tax/benefit position.
In Taxing Wages, the term tax includes the personal income tax, social security contributions and payroll taxes (which are aggregated with employer social contributions in the calculation of tax rates) payable on gross wage earnings. Consequently, any income tax that might be due on non-wage income and other kinds of taxes – e.g. corporate income tax, net wealth tax and consumption taxes – is not taken into account. The transfers included are those paid by general government as cash benefits, usually in respect of dependent children.
For most OECD countries, the tax year is equivalent to the calendar year, the exceptions being Australia, New Zealand and the United Kingdom. In the case of New Zealand and the United Kingdom, where the tax year starts in April, the calculations apply a ‘forward-looking’ approach. This implies that, for example, the tax rates reported for 2020 are those for the tax year 2020-2021. However, in Australia, where the tax year starts in July, it has been decided to take a ‘backward looking’ approach in order to present more reliable results. So, for example, the year 2020 in respect of Australia has been defined to mean its tax year 2019-2020.
Taxing Wages presents several measures of taxation on labour. Most emphasis is given to the tax wedge – a measure of the difference between labour costs to the employer and the corresponding net take-home pay of the employee – which is calculated by expressing the sum of personal income tax, employee plus employer social security contributions together with any payroll tax, minus benefits as a percentage of labour costs. Employer social security contributions and – in some countries – payroll taxes are added to gross wage earnings of employees in order to determine a measure of total labour costs. The average tax wedge measures identify that part of total labour costs which is taken in tax and social security contributions net of cash benefits. In contrast, the marginal tax wedge measures identify that part of an increase of total labour costs that is paid in taxes and social security contributions less cash benefits. However, it should be notified that this measure only includes payments that are classified as taxes. Employees and employers may also have to make non-tax compulsory payments (NTCPs)3 that may increase the indicators that are presented in the Taxing Wages publication. An accompanying paper to Taxing Wages that is available on the OECD Tax Database presents “compulsory payment indicators” that combine the burden of taxes and NTCPs: http://www.oecd.org/tax/tax-policy/non-tax-compulsory-payments.pdf.
The calculations also focus on the personal average tax rate and the net personal average tax rate. The personal average tax rate is the term used when the personal income tax and employee social security contributions are expressed as a percentage of gross wage earnings. The net personal average tax rate corresponds to the above measure net of cash benefits. The net personal marginal tax rate shows that part of an increase of gross wage earnings that is paid in personal income tax and employee social security contributions net of cash benefits.
Tax Wedge
Table 1.1 shows that the tax wedge between the labour costs to the employer and the corresponding net take-home pay for single workers without children, at average earnings levels, varied widely across OECD countries in 2020 (see column 1). While in Austria, Belgium, France, Germany and Italy, the tax wedge was more than 45%, it was lower than 20% in Chile, Colombia and New Zealand. The highest tax wedge is observed in Belgium (51.5%) and the lowest in Colombia (0.0%). In Colombia, the single worker at the average wage level did not pay personal income taxes in 2020, whereas their contributions to pension, health and employment risk insurances are considered to be non-tax compulsory payments (NTCPs)4 and therefore are not counted as taxes in the Taxing Wages calculations. Table 1.1 shows that the average tax wedge in OECD countries was 34.6% in 2020.
The changes in tax wedge between 2019 and 2020 for the average worker without children are described in column 2 of Table 1.1. The OECD average decreased by 0.39 percentage points. The decrease was significant compared to those observed in the previous years. Since the start of the production of the report (2000), the largest decreases in the OECD tax wedge for the average worker without children were observed in 2008 (0.48 percentage points) and in 2009 (0.52 percentage points), in the context of the Global Financial Crisis. Among the OECD member countries, the tax wedge increased in seven countries and fell in 29. The tax wedge remained at the same level for the average worker in Colombia between 2019 and 2020. The increases were comparatively small and none of them exceeded one percentage point. The largest increase was observed in Australia (0.42 percentage points). In contrast, there were decreases exceeding one percentage point in the United States (1.37 percentage points) and Italy (1.91 percentage points).
In general, the rises in tax wedge were driven by higher income tax (see column 3). This was the major factor for most of the countries showing an overall increase, the exception being Korea. For the latter, the increase in the tax wedge was due to higher employee and employer SSCs as a percentage of labour costs, whereas income tax slightly decreased.
In 21 of the 29 OECD countries that saw a decrease in the tax wedge, the decrease was derived for the most part from lower income taxes (Austria, Belgium, Chile, the Czech Republic, Denmark, Estonia, France, Germany, Ireland, Israel, Italy, Japan, Latvia, Lithuania, Luxembourg, Mexico, Poland, the Slovak Republic, Slovenia, Spain and Switzerland). In Austria and Lithuania, there were changes related to the COVID-19 crisis. In Austria, a marginal tax rate within the income tax schedule was reduced. In Lithuania, the tax-exempt amount was increased. In other countries with a decreasing tax wedge due to lower income tax, there were changes in the income tax system that were not related to the COVID-19 crisis and that affected the income taxes at the average wage level. In France, Poland and Slovenia, there was a reduction in one or more income tax rates within the income tax schedules. In Italy, the income tax reduction was due to a temporary additional PAYE tax credit that was introduced in 2020.5 In Japan, there was a tax relief reform in 2020.
In five other OECD countries with decreasing tax wedges, the changes were mostly driven by lower SSCs (Finland, Greece, Hungary, the Netherlands and the United Kingdom). Employer SSCs as a percentage of labour costs decreased by more than one percentage point in Finland (1.26 percentage points) and Hungary (1.41 percentage points). In Finland, the employer SSC rate was reduced by 1.8 percentage points in 2020 (from 20.49% to 18.69%). In Hungary, the employer SSC rate dropped by 2 percentage points in July 2020, from 17.5% to 15.5%. Although the measure resulted from a permanent change in labour taxation in Hungary, the timing was closely linked to the COVID-19 crisis. In Greece, both employee and employer SSC rates decreased between June 2019 and June 2020 from 15.75% to 15.33% and from 24.81% to 24.33%, respectively, leading to a decrease in both employee and employer SSCs (0.24 and 0.25 percentage points respectively). In the United Kingdom, employee SSCs decreased for the single average worker due to an increase in the income exempt limit in 2020. In the Netherlands, employee SSCs were reduced by increased tax credits.
In Iceland, the decreasing tax wedge derived from an even reduction in income taxes and employer SSCs as a percentage of labour costs.
In two countries, decreases in the tax wedge were also driven by cash benefit payments to the single worker at the average wage level. In Canada, the decline in the tax wedge resulted from a one-time special payment through the Goods and Services Tax credit that was delivered on 9 April 2020, in response to the COVID-19 crisis, and that was treated as a cash benefit in the Taxing Wages calculations. The cash benefit represented a change of 0.04 percentage points in the tax wedge. In the United States, the decrease in the tax wedge was mainly due to the Economic Impact Payment (EIP) that was part of the Coronavirus Aid, Relief, and Economic Security Act (the CARES Act) in response to the COVID-19 pandemic. The EIP was a tax credit that could be claimed on the 2020 tax return filed in 2021. An advance payment of the credit was made in 2020 and treated as a cash benefit in the Taxing Wages calculations. The cash benefit represented a change of 1.84 percentage points in the tax wedge.
Table 1.2 and Figure 1.1 show the constituent components of the tax wedge in 2020, i.e. income tax, employee and employer social security contributions (including payroll taxes where applicable), as a percentage of labour costs for the average worker without children. The labour costs in Table 1.2 are expressed in US dollars with equivalent purchasing power.
The percentage of labour costs paid in income tax varies considerably across OECD countries. The lowest figures are in Colombia (zero) and Chile (0.03%), with Greece, Israel, Japan, Korea, Mexico, Poland and the Slovak Republic also below 10%. The highest values are in Denmark (35.3%), with Australia and Iceland also over 20%. The percentage of labour costs paid in employee social security contributions also varies widely, ranging from zero in Australia, Colombia, Denmark and New Zealand to 19.0% in Slovenia and 19.2% in Lithuania. Employers in France pay 26.6% of labour costs in social security contributions, the highest amongst OECD countries. The corresponding figures are also more than 20% in eight other countries – Austria, Belgium, the Czech Republic, Estonia, Italy, the Slovak Republic, Spain and Sweden.
As a percentage of labour costs, the total of employee and employer social security contributions exceeds 20% in more than half of the OECD countries. It also represents at least one-third of labour costs in five OECD countries: Austria, the Czech Republic, France, Germany and the Slovak Republic.
Personal average tax rates
The personal average tax rate is defined as income tax plus employee social security contributions as a percentage of gross wage earnings. Table 1.3 and Figure 1.2 show the personal average tax rates in 2020 for a single worker without children at the average earnings level. The average workers’ gross wage earnings figures in Table 1.3 are expressed in terms of US dollars with equivalent purchasing power. Figure 1.2 provides a graphical representation of the personal average tax rate decomposed between income tax and employee social security contributions.
Table 1.3 and Figure 1.2 show that on average, the personal average tax rate for a single worker at average earnings in OECD countries was 24.9% in 2020. Germany had the highest rate at 38.9% of gross earnings; with Belgium, Denmark and Lithuania being the only other countries with rates of more than 35%. Chile, Colombia and Mexico had the lowest personal average tax rates at 7.0%, 0.0% and 10.8% of gross average earnings respectively. The personal average tax rate was zero for Colombia as the single worker did not pay personal income tax at the average wage level in 2020. Moreover, contributions to pension, health and employment risk insurance in Colombia are considered to be non-tax compulsory payments (NTCPs)6 and are not counted as taxes in the Taxing Wages calculations.
The impact of taxes and benefits on a worker’s take-home pay varies greatly among OECD countries. Such wide variations in the size and make-up of tax wedges, in part, reflect differences in:
The overall ratio of aggregate tax revenues to Gross Domestic Product; and,
The share of personal income tax and social security contributions in national tax mixes.
The mix of income tax and social security contributions paid out of gross wage earnings also varies greatly between countries as illustrated in Figure 1.2.
In 2020, the share of income tax within the personal average tax rate was higher than the share of the employee social security contributions for 24 of the 37 OECD member countries. No employee social security contributions were levied in Australia, Colombia, Denmark and New Zealand and their levels were at 4% or less of gross earnings in Estonia, Iceland, Ireland and Mexico. In contrast, the single worker at the average wage level paid substantially more (i.e., more than six percentage points) in employee social security contributions than in personal income tax in four countries – Chile, Japan, Poland and Slovenia. In five countries – the Czech Republic, Germany, Israel, Korea and Turkey – the shares of personal income tax and employee social security contributions as percentages of gross earnings were very close (i.e., differences of 3 percentage points or less).
Single versus one-earner couple taxpayers
Table 1.4 compares the tax wedges for a one-earner married couple with two children and a single individual without children, at average earnings levels. These tax wedges varied widely across OECD countries in 2020 (see columns 1 and 2). The size of the tax wedge for the couple with children is generally lower than the one observed for the individual without children, since many OECD countries provide a fiscal benefit to households with children through advantageous tax treatment and/or cash benefits. Hence, the OECD average tax wedge for the one-earner couple with two children was 24.4% compared to 34.6% for the single average worker. This gap has widened (by 0.7 percentage points) since 2019.
The tax savings realised by a one-earner married couple with two children compared to a single worker without children were greater than 20% of labour costs in Canada, Luxembourg and Poland, and more than 15% of labour costs in seven other countries – Austria, Belgium, the Czech Republic, Germany, Ireland, Lithuania and Slovenia. The tax burdens of one-earner married couples and single workers on the average wage were the same in Mexico and differed by three percentage points or less in Chile (0.03%), Greece, Israel and Turkey (see columns 1 and 2).
In 19 of the 37 OECD countries, there was only a small change (not exceeding plus or minus one percentage point) in the tax wedge of an average one-earner married couple with two children between 2019 and 2020 (see column 3). There was no change in Chile only. There was an increase of more than one percentage point in New Zealand (1.58 percentage points) resulting entirely from a lower income related cash benefit payment in 2020. There were decreases of one percentage point or more in 16 countries – Austria, Belgium, Canada, Colombia, Finland, Germany, Iceland, Ireland, Italy, Korea, Latvia, Lithuania, Luxembourg, the Netherlands, Poland and the United States. For most of those countries, the changes in the tax wedge resulted from the introduction of, or changes in, tax provisions or cash benefits for dependent children. Several of these countries introduced measures related to the COVID-19 crisis in 2020. In Austria (1.66 percentage points), there was a change in the income tax schedule (reduced income tax rate) in response to the COVID-19 crisis. In addition, an extra child benefit was paid in response to the COVID-19 crisis. In Lithuania (9.88 percentage points), as previously mentioned, the tax-exempt amount was increased in response to the COVID-19 crisis and also a one-off child benefit payment was made to families in response to the COVID-19 crisis. Extra or one-off cash benefit or tax provision payments in response to the COVID-19 crisis were also made in Canada (2.10 percentage points), Germany (1.38 percentage points), Iceland (1.27 percentage points), Korea (2.06 percentage points) and the United States (4.62 percentage points). Detailed explanations on COVID-19 related measures are given in the country details in Part II of the report.
A comparison of the changes in tax wedges between 2019 and 2020 for one-earner married couples with two children and single persons without children, at the average wage level, is shown in column 5 of Table 1.4. The fiscal preference for families increased in 27 OECD countries: Australia, Austria, Belgium, Canada, Colombia, Czech Republic, Estonia, Finland, France, Germany, Greece, Iceland, Ireland, Israel, Italy, Japan, Korea, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, the Slovak Republic, Spain, Switzerland and the United States. Additionally, the effects of changes in the tax system on the tax wedge were of the same magnitude for both household types only in Mexico. In four countries: Chile, Denmark, Portugal and the United Kingdom; the fiscal preference for families decreased, by less than 0.03 percentage points in each country.
Notes: Countries ranked by decreasing rates for single taxpayer without children.
Household types: a single individual without children and earnings at the average wage level and a one earner married couple with two children and earnings at the average wage level.
Figure 1.3 compares the net personal average tax rate for the average worker between a single individual and a one-earner married couple with two children at the same income level. These results show the same pattern as the tax wedge results. This is because employer social security contributions, which are not taken into account in the former but included in the latter, are independent of household type. Due to tax reliefs and cash benefits for families with children, the one-earner married couple’s disposable income was higher than the single individual’s by more than 20% of earnings in six countries – Poland (25.2%), Luxembourg (24.2%), the Czech Republic (23.8%), Canada (22.4%), Belgium (21.2%) and Slovenia (20.2%). At the lower end of the spectrum, the disposable income of the one-earner married couple was higher than the single individual by less than 10% of earnings in 14 countries – Australia (8.0%), the Netherlands (7.2%), Spain (7.0%), Sweden (6.8%), Japan (6.0%), Korea and Colombia (5.4%), Finland (5.2%), the United Kingdom (5.0%), Norway (4.0%), Greece (3.8%), Israel (2.6%), Turkey (1.8%) and Chile (0.03%). The disposable income was the same for both household types in Mexico, as their net personal average tax rates were identical.
Tax on labour income for two-earner couples
The preceding analysis focuses on two households with comparable levels of income: the single worker at 100% of the average wage, and the married couple with one earner at 100% of the average wage, with two children. This section extends the discussion to include a third household type: the two-earner married couple, earning 100% and 67% of the average wage, with two children.
For this household type, the OECD average tax wedge as a percentage of labour costs for the household was 28.9% in 2020 (Figure 1.4 and Table 1.5). Belgium had a tax wedge of 43.4%, which was the highest among OECD countries. The other countries with tax wedges exceeding 40% were Italy (40.04 %),France (40.2%) and Germany (41.5%). At the other extreme, the lowest tax wedge was observed in Colombia (-6.4%). In Colombia, the tax wedge was negative as this household type did not pay income taxes at that level of earnings. The household paid contributions that are not considered to be taxes7 and that are not included in the calculations. This household type received cash benefits that were paid on top of their wages, resulting in a negative tax wedge. The other countries with tax wedges of less than 20% were Korea (19.3%), Mexico (18.7%), New Zealand (17.6%), Israel (16.0%), Switzerland (15.7%) and Chile (6.6%).
Figure 1.4 shows the average tax wedge and its components as a percentage of labour costs for the two-earner couple for 2020. On average across OECD countries, income tax represented 10.2% of labour costs and the sum of the employees’ and employers’ social security contributions represented 21.4%. The OECD tax wedge is net of cash benefits, which represented 2.7% of labour costs in 2020.
The cash benefits that are considered in the Taxing Wages publication are those universally paid to workers in respect of dependent children between the ages of six to eleven inclusive. In-work benefits that are paid to workers regardless of their family situation are also included in the calculations. For the observed two-earner couple, Denmark paid an income-tested cash benefit (the Green Check) that also benefited childless single workers. In response to the COVID-19 crisis, workers without children also received cash benefits in Canada and the United States as observed in the previous section on the tax wedge for the average single worker.
Compared to 2019, the OECD average tax wedge of the two-earner couple decreased by 0.75 percentage points in 2020, as indicated in Table 1.5 (column 2) as a consequence of decreasing tax wedges in 31 out of 37 OECD countries. It increased in six countries only – Norway (0.07 percentage points), Portugal (0.09 percentage points), Sweden and Turkey (both by 0.16 percentage points), New Zealand (0.24 percentage points) and Australia (0.48 percentage points). In most countries with decreasing tax wedges for families with children between 2019 and 2020, the lower tax wedges resulted from changes in income tax systems and SSCs, as observed for the single workers, and also from increased cash benefits or tax provisions for dependent children between the two years. Decreases of more than one percentage point were observed in 15 countries – Poland (2.97 percentage points), the United States (2.78 percentage points), Lithuania (2.50 percentage points), Italy (1.75 percentage points), France (1.48 percentage points), Austria (1.33 percentage points), Latvia (1.31 percentage points), Luxembourg (1.30 percentage points), Belgium (1.23 percentage points), Colombia (1.22 percentage points), Ireland (1.20 percentage points), Iceland (1.13 percentage points), Greece and Korea (both by 1.11 percentage points) and Finland (1.10 percentage points). As observed for the one-earner couples with children in the previous section, among some of these countries, measures related to the COVID-19 crisis were introduced in 2020. Extra or one-off cash benefit or tax provision payments in response to the COVID-19 crisis were made to two-earner couples with children in Austria, Canada, Korea, Iceland, Lithuania and the United States. In addition to an extra child benefit payment in response to the COVID-19 crisis, a marginal income tax rate within the income tax schedule was reduced in Austria and a tax-exempt amount was increased in Lithuania. In Poland, which had the second largest increase in the cash benefit as a percentage of labour costs (2.24 percentage points) after the United States (3.12 percentage points) for two-earner couples with children, the increase was due to a reform of the family benefit system that was introduced in July 2019 and that was not related to the COVID-19 crisis.
Among the six countries where tax wedges increased for two-earner couples with children in 2020, the increase in income tax as a percentage of labour costs represented the bulk of the increase in the tax wedge in five of them: Norway (0.07 percentage points), Portugal (0.09 percentage points), Turkey (0.16 percentage points), New Zealand (0.24 percentage points) and Australia (0.48 percentage points). In Sweden, the increase in the tax wedge was mainly driven by higher income tax and reduced cash benefits as a percentage of labour costs (0.08 percentage points and -0.07 percentage points).
Note: Two earner married couple, one at 100% and the other at 67% of the average wage, with 2 children. Includes payroll taxes where applicable.
Regarding the net personal average tax rate as a percentage of gross earnings, the OECD average was 18.1% in 2020 for the two-earner couple with two children where one spouse earns the average wage and the other earns 67% of it. Table 1.6 shows the net personal average tax rates for the OECD countries and their components as a percentage of gross earnings. The household gross wage earnings figures in column 5 are expressed in terms of US dollars with equivalent purchasing power. Unlike the results shown in Table 1.3, in Table 1.6 cash benefits are taken into account and reduce the impact of the employees’ income taxes and social security contributions (columns 2 plus 3 minus column 4).
The net personal average tax rate on the two-earner couple varied greatly among OECD countries in 2020, ranging from -6.4% in Colombia to 30.5% in Denmark. In Colombia, the tax wedge was negative as the household did not pay income taxes at that level of earnings. The household paid contributions that are not considered to be taxes8 and that are not taken into account in the calculations. This household type received cash benefits that were paid on top of their wages, resulting in a negative net personal average tax rate. In other terms, the disposable income of the household after tax represented 106.4% of the couple’s gross wage earnings in Colombia while it represented 69.5% in Denmark. In addition, the net personal average tax rate was less than 10% in Poland (9.2%), Mexico (8.4%), Estonia (7.0%), Chile (6.6%) as well as in Colombia.
The Taxing Wages indicators focus on the structure of income tax systems on disposable income. To assess the overall impact of the government sector on people’s welfare other factors such as indirect taxes (e.g. VAT) should also be taken into account, as should other forms of income (e.g. capital income). Non-tax compulsory payments that affect households’ disposable incomes are not included in the calculations presented in the publication, but further analyses on those payments are presented in the online report: http://www.oecd.org/tax/tax-policy/non-tax-compuslory-payments.pdf.
Wages
Table 1.7 shows the gross wage earnings in national currency of the average worker in each OECD member country for 2019 and 2020. The figures for 2020 are estimated by the OECD Secretariat by applying the change in the compensation per employee in the total economy as presented in the OECD Economic Outlook (Volume 2020 issue 2) database to the final average wage values provided by OECD member countries. More information on the values of the average wage and the estimation methodology is included in the Annex of this Report.
The annual change in 2020 – shown in column 3 – varied between -13.3% in Colombia and 20.9% in Turkey. To a large extent, the changes in wage levels in 27 OECD countries reflect the inflation trends, whereas they went in opposite directions in 10 countries (Belgium, Colombia, the Czech Republic, Finland, France, Japan, Korea, Luxembourg, Mexico and Portugal)– see column 4 of Table 1.7. The annual change in real wage levels (before personal income tax and employee social security contributions) is within the range of -2% to +2% for 21 countries; see column 5 of Table 1.7. Sixteen countries show changes that are outside this range. Among those countries, the changes exceed 2% in the Netherlands (2.3%), Canada (2.7%), Australia (2.8%), Hungary (3.5%), the United States (5.0%), Lithuania (5.1%) and Turkey (7.9%). In contrast, they are below -2% in France (-3.1%), the Czech Republic, Ireland and Italy (all -3.8%), Switzerland (-4.0%), Belgium (- 4.6%), Mexico (-4.7%), Luxembourg (-4.8%) and Colombia (-15.5%).
In 23 out of the 37 OECD countries, the average single worker without children had higher real post-tax income in 2020 than in 2019, either because real wages before tax increased more or decreased less than personal average tax rates; or personal average tax rates decreased or remained unchanged while real wages before tax increased (see column 6).
In contrast, the average single worker without children had lower real post-tax income in 2020 in Belgium, Chile, Colombia, the Czech Republic, Finland, France, Japan, Korea, Luxembourg, Mexico, New Zealand, Norway, Spain and Switzerland:
The real wage before tax decreased more than the personal average tax rate in Belgium, Chile, the Czech Republic, Finland, France, Japan, Luxembourg, Mexico, Spain and Switzerland.
The real wage before tax decreased whereas the personal average tax rate increased in Korea and Norway.
The real wage before tax decreased while the personal average tax rate remained unchanged in Colombia.
The personal average tax rate increased more than the real wage before tax in New Zealand.
When comparing wage levels, it is important to note that the definition of average wage earnings can vary between countries due to data limitations. For instance, some countries do not include the wages earned by supervisory and managerial workers or do not exclude wage earnings from part-time workers (see Table A.4 in the Annex). Furthermore, caveats related to the average wage figures in 2020 are discussed in Chapter 2, the special feature.
Table 1.8 provides more information on whether the average wages for the years 2000 to 2020 are based on industry sectors C-K inclusive with reference to the International Standard Industrial Classification of All Economic Activities, Revision 3 (ISIC Rev.3) or industry sectors B-N inclusive with reference to the International Standard Industrial Classification of All Economic Activities, Revision 4 (ISIC Rev.4).
Most OECD countries have calculated average wage earnings on the basis of sectors B-N in the ISIC Rev. 4 Industry Classification at least since 2008. Some countries have revised the average wage values for prior years as well. Average wage values based on the ISIC Rev. 4 Classification or any variant are available for years back to 2000 for Australia, Canada, the Czech Republic, Estonia, Finland, Greece, Hungary, Iceland, Italy, Japan, Latvia, Lithuania, the Slovak Republic, Slovenia, Spain and Switzerland.
Australia (for all years) and New Zealand (from 2004 onwards) have provided values based on the 2006 ANZSIC industry classification, divisions B to N, which substantially overlaps the ISIC Rev.4, sectors B to N. For New Zealand, the years prior to 2004 continue to be based on sectors C-K in ANZSIC. Turkey has provided values based on the NACE Rev.2 classification sectors B-N from 2007 onwards. Values for the years prior to 2007 are based on the average production worker wage (ISIC rev.3.1, sector D). The average wages are not based on the sectors B-N in the ISIC Rev. 4 Industry Classification for the Netherlands (from 2012 onwards) and Mexico (all years).
Notes
← 1. From the 2020 edition of Taxing Wages, the household types including spouses earning 33% of the average wage was replaced with household types where both spouses are at the average wage level and where one spouse is at the average wage level and the other at 67% of it.
← 2. Not all national statistical agencies use ISIC Rev.3 or Rev.4 to classify industries. However, the Statistical Classification of Economic Activities in the European Community (NACE Rev.1 or Rev.2), the North American Industry Classification System (US NAICS 2012). The Australian and New Zealand Standard Industrial Classification (ANZSIC 2006) and the Korean Standard Industrial Classification (6th to 9th KISC) include a classification which broadly conforms either with industries C-K in ISIC Rev. 3 or industries B-N in ISIC Rev.4.
← 3. Non-tax compulsory payments are requited and unrequited compulsory payments to privately-managed funds, welfare agencies or social insurance schemes outside general governments and to public enterprises (http://www.oecd.org/tax/tax-policy/tax-database.htm#NTCP).
← 4. In Colombia, the general social security system for healthcare is financed by public and private funds. The pension system is a hybrid of two different systems: a defined-contribution, fully-funded pension system; and a pay-as-you-go system. Each of those contributions are mandatory and more than 50% of total contributions are made to privately managed funds. Therefore, they are considered to be non-tax compulsory payments (NTCPs) (further information is available in the country details in Part II of the report). In addition, in Colombia, all payments for employment risk are made to privately managed funds and are considered to be NTCPs. Other countries also have NTCPs (please see http://www.oecd.org/tax/tax-policy/tax-database.htm#NTCP).
← 5. The additional PAYE tax credit was finally included in the draft budget law for 2021 as measure introduced on permanent basis in Italian PIT system.
← 6. See note 4.
← 7. See note 4.
← 8. See note 4.