Am I allowed to correct my tax assessment in Denmark?
Yes — and for most people the tax authority generates your assessment automatically, so you just check and correct it. Each autumn you get a preliminary assessment for the coming year, and from mid-March the annual assessment for the prior year is ready in TastSelv on skat.dk. The deadline to correct is 1 May, or 1 July for those with more complex affairs such as the self-employed or foreign income. The personal allowance is 54,100 kr in 2026. Top tax of 7.5% is paid on personal income over 777,900 kr. Residual tax paid after the deadline carries interest.
📋 The rules
- The tax authority generates the assessment automatically
- You correct it in TastSelv on skat.dk
- The deadline is 1 May (1 July for complex affairs)
- The personal allowance is 54,100 kr in 2026
- Top tax 7.5% over 777,900 kr
🔓 Exceptions
- The self-employed and those with foreign income have a 1 July deadline
- Overpaid tax is refunded automatically with a small interest top-up
- Limited tax liability and cross-border commuters have their own rules
⚠️ Penalties & fines
If you do not correct errors or under-report, you can have tax reassessed plus interest. Deliberate evasion can bring a fine or prosecution.
📎 Official sources
❓ Frequently asked
Do I file a tax return myself?
For most people the tax authority generates the assessment automatically. You just check and correct it in TastSelv.
What is the deadline?
1 May for most, and 1 July for those with more complex affairs such as the self-employed or foreign income.
What is the personal allowance in 2026?
54,100 kr. It is the part of your income you pay no tax on.
When do I pay top tax?
Top tax of 7.5% is paid on personal income over 777,900 kr in 2026.
What happens with residual tax?
Residual tax paid after the deadline carries interest. Overpaid tax is refunded automatically.
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