The tax wedge is one of the most useful — and most misunderstood — numbers in international tax. It answers a question your payslip never quite does: of everything it costs to employ me, how much disappears in taxes before it reaches my pocket?
The definition
The OECD defines the tax wedge as the difference between total labour cost (your gross wage plus the employer’s social-security contributions) and your net take-home pay, expressed as a percentage of that total labour cost. It has three ingredients:
- Personal income tax
- Employee social-security contributions (your own deductions)
- Employer social-security contributions (paid on top of your wage)
Net cash benefits — such as child allowances — are subtracted where they apply, which is why families usually have a lower wedge than single workers.
Why it’s bigger than your income tax
People often assume “tax” means income tax. But for an average worker, social security is frequently the larger slice — and the employer’s share is invisible. Compare a few OECD countries for a single worker on the average wage (2023 data):
| Country | Income tax | Employee SSC | Employer SSC | Total tax wedge |
|---|---|---|---|---|
| Germany | 17.0% | 20.5% | 20.0% | 47.9% |
| France | 16.2% | 11.3% | 36.3% | 46.8% |
| United States | 16.6% | 7.7% | 8.1% | 29.9% |
| United Kingdom | 14.8% | 8.9% | 11.2% | 31.3% |
| Denmark | 36.0% | 0% | 0.6% | 36.4% |
Notice France: income tax is modest at 16.2%, but a 36.3% employer contribution drives the wedge to 46.8%. Denmark is the mirror image — almost everything runs through income tax, with negligible social security.
How to read the number
A higher wedge means labour is taxed more heavily. The OECD average for a single worker is about 34.9%; the EU-22-in-OECD average is higher at about 41.6%. The lightest wedges are in Colombia (about 0%, because an average worker falls below tax thresholds in the OECD model), Chile (~7%) and several non-European OECD members; the heaviest is Belgium at about 52.7%.
But the wedge only measures taxes on labour. It says nothing about VAT, property or capital taxes — or about what those contributions buy, like healthcare and pensions. Use it as a sharp, comparable measure of the labour-tax burden, not as a verdict on a country’s whole tax system.
Where to go next
- See the tax wedge for every OECD country with full breakdowns.
- Browse the highest and lowest tax wedge rankings.
- Read why employer social security matters so much.
- Model a salary in the labour-cost to net-pay estimator.
Figures from OECD Taxing Wages (2023 data year), CC BY 4.0. These are modelled averages for a representative worker, not personal tax advice.