The following commentary on the changes in tax burdens and marginal tax rates between 2018 and 2019 focuses on two of the eight household types – single employees, without children, at the average wage (column 2 of the tables) and one-earner married families, with two children, at the average wage (column 5). Comparisons with the columns 1, 3-4 and 6-8 of the tables give corresponding results for the six other household types. Generally, only those changes exceeding 1 percentage point for average effective rates and 5 percentage points for marginal effective rates are flagged in this chapter. Most of these are due to tax reforms or changes in the tax systems. Further detailed information on the countries’ tax systems is given in the Part II of the Report that is entitled “Country details, 2019”.
Table 5.1 presents the total tax wedge (described as personal income tax plus employee and employer’s social security contributions less cash benefits) by household type as a percentage of labour costs (gross wage plus employers’ social security contributions [including payroll taxes]) in 2018. In the majority of countries, changes in the gap between total labour costs and the corresponding net take-home pay in 2019 as compared with 2018 were within plus or minus one percentage point.
Comparing column 2 in Tables 3.1 and 5.1, the OECD average tax wedge decreased by 0.1 percentage point from 36.1% to 36.0% for a single average worker between 2018 and 2019. It fell by more than one percentage point in Lithuania (3.4 percentage points) only. In Lithuania, a reform of labour taxation was introduced in 2019, which involved a major reduction in employer social security contributions, with most of this reduction being replaced with an increase in employee social security contributions and a corresponding increase in gross wages. The total employer’s social security contribution rate, including the payroll tax rate, declined from 31.2% in 2018 to 1.79% in 2019 while the total employee‘s social security contribution rate increased from 9% to 19.5%. In addition, an income ceiling of around 9.5 times the average wage was also introduced for employee and employer social security contributions. To offset the increase in employee social security contributions the reform also required employers to increase gross wages by 28.9% (further information is given in the country details in Part II of the report). In contrast, there was an increase of more than one percentage point in the tax wedge only in Estonia (1.1 percentage point), where the income related basic tax allowance decreased while gross wage earnings increased between 2018 and 2019.
For one-earner married couples (comparing column 5 of Tables 3.1 and 5.1) the OECD average tax wedge decreased by 0.1 percentage point from 26.45%1 to 26.37% between 2018 and 2019, although increases of more than one percentage point were observed in four countries (Estonia, New Zealand, Poland and Slovenia) and decreases of more than one percentage in three countries (Austria, France and Lithuania). The tax wedge increased by more than one percentage point in Estonia (1.4 percentage points) because of reduced income related basic tax allowance; in New Zealand (1.6 percentage points), Poland (2.6 percentage points) and Slovenia (3.3 percentage points) due to reduced income-tested child benefit payments. The decrease of more than one percentage point in the tax wedge for the one-earner couple with two children in Austria (3.7 percentage points) was due to the introduction of a tax credit for dependent children. In France (2.3 percentage points), it resulted from the payment of an in-work benefit (i.e. Prime d’activité) in 2019 unlike in 2018. That year, the household was not eligible to the income tested in-work benefit. In Lithuania, the reduction (4.2 percentage points) was the consequence of reduced employer social security contributions as described in the previous paragraph.
Table 5.2 shows the combined burden of personal income tax and employee social security contributions in the form of personal average tax rates as a percentage of gross wage earnings in 2018. For single workers on average wage, it increased by more than one percentage point between 2018 and 2019 in Estonia (1.4 percentage points) and Lithuania (14.0 percentage points). In Estonia, the personal income tax increased due to a reduced basic tax allowance. In Lithuania, the increase was mainly driven by the shift of most of the employers’ social security contributions to employees, as mentioned in a previous paragraph. There were no decreases of more than one percentage point in the personal average tax rates for single average workers. In contrast, the personal average tax rate decreased by more than one percentage point for one-earner married couples with two children in Austria (4.9 percentage points), Belgium (1.2 percentage points) and Poland (3.9 percentage points) due to lower personal income taxes. In Austria and Poland, a tax credit for dependent children was paid to the household in 2019. In Belgium, the personal income tax was reduced mainly due to the combined effect of increases in the tax allowance for non-earning spouse (i.e. quotient conjugal) and in the basic tax credit. The personal average tax rate increased by more than one percentage point for the one-earner married couple with two children in the Czech Republic (1.2 percentage points), Estonia (1.9 percentage points) and Lithuania (14.0 percentage points). In the Czech Republic, the total tax credit payments increased more slowly than the income tax liabilities between the two years. For Estonia and Lithuania, the reasons for the increases in the personal average tax rates for the one-earner couples with two children are similar to those previously mentioned for the single average workers.
Table 5.3 provides the combined burden of personal income tax and employee social security contributions less the amount of cash benefits as a percentage of gross wage earnings in 2018. This is the measure of the net personal average tax rate. Comparing column 2 of Tables 3.3 and 5.3, for single workers on average wage, there was a change of more than one percentage point between 2018 and 2019 in Estonia (1.4 percentage points) and Lithuania (14.0 percentage points) similarly to the personal average tax rate. Comparing column 5 of Tables 3.3 and 5.3, increases in the net personal average tax rate of one-earner married couples with two children exceeding one percentage point occurred in the Czech Republic (1.5 percentage points), Estonia (1.8 percentage points), Lithuania (15.3 percentage points), New Zealand (1.6 percentage points), Poland (3.0 percentage points) and Slovenia (3.9 percentage points). Regarding Poland, for the one-earner couple with two children, the net personal average tax rate increased while the personal average tax rate decreased. In 2019, the tax credit payment for dependent children did not counterbalance the reduction in the family cash benefit payments. In contrast, the net personal average tax rate decreased by more than one percentage point in Austria (4.6 percentage points), Belgium (1.2 percentage points) and France (3.3 percentage points). The reasons for the changes in Austria, Belgium, the Czech Republic, Estonia, France, Lithuania, New Zealand and Slovenia are discussed in previous paragraphs.
Table 5.4 presents information on personal income tax due as a percentage of gross wage earnings in 2018. Comparing column 2 of Tables 3.4 and 5.4, in most OECD member countries, the average personal income tax rates for single workers on average wage changed only slightly between 2018 and 2019 for most OECD member countries. The OECD average personal income tax rate increased by 0.2 percentage points to 15.9%. The average personal income tax rate increased by more than one percentage point in Estonia (1.4 percentage points) and Lithuania (3.5 percentage points). In Lithuania, in addition to the changes in the social security contribution rates for employees and employers, the personal income tax system moved from a flat tax rate (i.e. 15%) to a progressive income tax schedule under which the marginal income tax rate at the lowest income bracket (i.e. 20%) was higher than the previous flat tax rate. Furthermore, taxable income at the average wage level did not exceed the lowest income tax bracket. In contrast, the average personal income tax rate decreased by more than one percentage point for the single average worker in the Netherlands (1.1 percentage point) only, due to a reformed income tax schedule implying lower marginal tax rates at the average wage level in 2019. Comparing column 5 of Tables 3.4 and 5.4, the OECD average personal income tax rate for the one-earner married couples with two children, which was 10.6% in 2018, decreased by 0.1 percentage point in 2019. For that household type, there were decreases of more than one percentage point in Austria (4.9 percentage points), Belgium (1.3 percentage points) and Poland (3.9 percentage points). In contrast, the average personal income tax rates increased by more than one percentage point in the Czech Republic (1.2 percentage points), Estonia (1.9 percentage points) and Lithuania (3.5 percentage points).
Table 5.5 shows information on employee social security contributions as a percentage of gross wage earnings in 2018. Comparing columns 2 and 5 of Tables 3.5 and 5.5, there were no changes of more than one percentage point between 2018 and 2019 for either of these household types in most OECD member countries, the exception being Lithuania. There were no changes for 29 out of the 36 OECD countries, and changes going from 0.1 to 0.6 percentage points for six other countries (Canada, France, Germany, Greece, Korea and the Netherlands). In contrast, in Lithuania the employee social security contributions as a percentage of gross wage earnings increased by 10.5 percentage points for both household types due to the tax reform that has been described in a previous paragraph (see also the country details in Part II of the Report). The change in the Lithuania employee social security contributions accounts for the whole increase in the OECD average employee social security contribution rate that rose to 10.0% for both households (+0.27 percentage points for both households) between 2018 and 2019.
Table 5.6 shows the marginal tax wedge (rate of personal income tax plus employee and employer social security contributions and payroll taxes where applicable minus cash benefits) as a percentage of labour costs, when the gross wage earnings of the principal earner rises by 1 currency unit in 2018. Comparing columns 2 and 5 respectively in Tables 3.6 and 5.6, changes between 2018 and 2019 in the marginal tax wedge were generally by less than 5 percentage points. There was a change of more than 5 percentage points only in France (+22.2 percentage points for the one-earner married couple with two children). In France, the large increase in the marginal tax wedge was due to the tapering of the in-work benefit (i.e. Prime d’activité) that did not occur in 2018 but did occur in 2019. The household was eligible for the benefit in 2019 unlike in 2018. As a result, the withdrawal effect of the in-work benefit was captured in the marginal tax wedge for 2019, which was consequently higher than in 2018.
Table 5.7 presents the marginal rate of personal income tax plus employee social security contributions minus cash benefits (the net personal marginal tax rate) by household type and wage level, when the gross wage earnings of the principal earner rise by 1 currency unit in 2018. Comparing columns 2 and 5 respectively in Tables 3.7 and 5.7, the pattern of changes between 2018 and 2019 in the net personal marginal tax rates were similar to that for the marginal tax wedge discussed above. Changes outside the range of plus or minus 5 percentage points were in France (+30.1 percentage points for the one-earner married couple with two children) and Lithuania (+11.0 percentage points for the two household types).The increase in the net personal marginal tax rate for Lithuania was driven by the rises in the marginal personal income tax rate (see previous paragraph on Table 5.4) and the employee social security contribution rates.
Table 5.8 shows the percentage increase in net income relative to the percentage increase in gross wages when the latter increases by 1 currency unit.2 Table 5.9 provides the percentage increase in net income relative to the percentage increase in labour costs (i.e. gross wage earnings plus employer social security contributions and payroll taxes) when the latter rises by 1 currency unit.3 The results shown in these two tables are directly dependent upon the marginal and average tax rates that have been discussed in the paragraphs above. Table 5.10 to Table 5.13 report background information on levels of labour costs plus gross and net wages in 2018.