The effective tax rate is the average share of your income that you actually hand over in tax. You calculate it by dividing your total tax bill by your total income and expressing the result as a percentage. It gives a far more honest picture of your real burden than the headline bracket you fall into.
Because progressive systems tax each band of income at a different rate, the effective rate is always lower than the marginal tax rate. Only your top slice of earnings is taxed at the highest rate, while earlier slices are taxed lightly or not at all, dragging the average down.
Consider someone with 60,000 of income who pays 12,000 in total tax. Their effective rate is 12,000 divided by 60,000, or 20%, even if their marginal rate is 40%. The two numbers answer different questions: the marginal rate guides decisions about extra income, while the effective rate tells you the overall cost.
- Effective rate: total tax divided by total income.
- Marginal rate: tax on your next unit of income.
Effective rates are the fairest way to compare regimes, since headline rates hide allowances and taxable income rules. A worker in France, Germany or the US can have similar effective rates despite very different brackets. See the real comparison with the compare taxes by country tool.