Make sure that you update the details in your preliminary income assessment for 2026, so you pay the right tax each month.
The preliminary income assessment (forskudsopgørelse): Your income and tax budget
The preliminary income assessment is a kind of budget of your income and tax. It's available each year in November and shows your expected income and tax for the coming year.
If something changes in your financial situation, you should update your preliminary income assessment to pay the right tax throughout the year.
Tax assessment notice (årsopgørelse): Was your budget correct or have you paid too much or too little tax?
The tax assessment notice is a statement of your tax for the past year. It's available in March and shows how much you actually earned and paid in tax.
The more accurate your budget is, the more it matches your tax assessment notice which means that you have paid the right tax during the year.