Kapitalindkomst

Kapitalindkomst ("capital income") is a Danish tax category that includes interest income, certain capital gains, rental income, and other investment returns. It is added to (or subtracted from) your personal income for tax purposes.

Positive vs. negative kapitalindkomst

• Positive kapitalindkomst: Added to your top-bracket income, potentially taxed at up to ~42% (including municipal tax + topskat)
• Negative kapitalindkomst: Generates a tax deduction worth approximately 25–33%, depending on the amount and municipality

Prediction market classification

If prediction market gains are classified as kapitalindkomst rather than aktieindkomst, the effective tax rate could be higher since there's no reduced rate for the first portion. Losses, however, would provide a deduction against other income at the kapitalindkomst deduction rate.

Reporting to SKAT

Capital income is reported on your annual Danish tax return (årsopgørelse). International prediction market income that isn't pre-reported must be added manually through SKAT's TastSelv digital platform.

Comparison across Nordic countries

Denmark's kapitalindkomst system is part of the Nordic "dual income tax" model, but each country implements it differently:

• Denmark: Kapitalindkomst added to personal income, taxed at up to ~42%
• Sweden: Inkomst av kapital taxed at flat 30% — simpler and often lower
• Norway: Capital gains at flat 22%, with skjermingsfradrag (shielding deduction) reducing the taxable base
• Finland: Pääomatulo at 30% (34% above €30,000)

For prediction market traders, Sweden and Norway tend to be the most favorable Nordic jurisdictions, while Denmark's rates can be the highest depending on total income.

Frequently asked questions

Can negative kapitalindkomst offset my wage income?

Not directly. Negative kapitalindkomst generates a skatteværdi (tax value) — a credit worth approximately 25–33% of the negative amount. This credit reduces your overall tax but doesn't reduce taxable income dollar-for-dollar like US capital losses can.