Forex Trading Tax in Denmark 2026 — Complete Guide

Forex Tax Treatment in Denmark

Forex trading profits are taxed as capital income at 27% on gains up to DKK 61,000 and 42% on gains above that threshold. Losses can be offset against other capital income. Denmark uses a mark-to-market system for certain derivatives, meaning unrealised gains may also be taxed.

Forex and CFD profits are kapitalindkomst. Many derivatives are taxed on a mark-to-market basis (lagerprincippet), meaning year-end unrealised gains are also taxable.

Tax Rates Table — Denmark DKK

Applicable rates as of April 2026.

What Counts as Taxable?

Most Denmark residents need to declare the following types of trading income:

• Realised forex/CFD capital gains. Profits from closing positions during the tax year.
• Dividend-equivalent payments. Cash adjustments paid by your broker on long share-CFD positions when the underlying issues a dividend.
• Carry / swap interest received. Positive overnight financing credited to long carry-trade positions is normally taxable as financial income.
• Cashback, rebates and bonuses. Cash incentives paid by the broker may be reportable as miscellaneous or financial income.
• Crypto CFD profits. Profits from cryptocurrency CFDs are taxed under the same rules as other CFDs (this is different from spot crypto, which usually has its own treatment).
• Foreign exchange differences. Gains or losses from holding foreign-currency balances may need to be reported separately when converted back to your home currency.

Professional vs Retail Trader — Tax Implications

Denmark does not formally distinguish retail and professional FX traders for tax purposes — the lagerprincip applies regardless. Business-scale activity may shift to personlig erhverv with self-employment social contributions.

How to Declare Forex Income in Denmark

1. 1

   Download your annual statement from each broker (and convert all amounts to DKK using year-end FX rates if your account is in another currency).

2. 2

   Calculate net realised profit or loss for the tax year — buy/sell pairs only (unrealised positions are usually excluded, except for mark-to-market regimes).

3. 3

   Add carry/swap interest, dividend-equivalent payments, and any cashback or rebates.

4. 4

   Open Arsopgorelsen (online via TastSelv) on the Skattestyrelsen / SKAT portal.

5. 5

   Enter the totals in the capital-gains / investment-income section and indicate the source country of each broker.

6. 6

   Pay any balance owed by the deadline (1 May (employees) or 1 July (self-employed) of the following year) and keep the receipt and broker statements with your records.

Loss Offset Rules

Record Keeping Requirements

Keep year-end statements and a complete trade log in DKK. Foreign accounts must be reported to SKAT.

• Annual broker statements (PDF and machine-readable formats)
• Trade-by-trade ledger with timestamps, instrument, and P&L
• Year-end account valuation (mandatory for wealth-tax regimes)
• Proof of any foreign tax already paid, to claim against home liability under double-tax treaties
• FX-conversion rates used to translate amounts into DKK

Tax Reporting Deadlines

Recommended Accountants & Software

Use the SKAT TastSelv portal. An autoriseret revisor is helpful for active derivative traders due to the lagerprincip complexity.

We do not endorse any single product. For active traders we generally recommend a local advisor who has direct experience with CFD/derivative reporting and any cross-border passporting that applies to your broker.

Frequently Asked Questions

Popular brokers used by Denmark traders