Denmark tax deadlines 2026.
Every individual and self-employed income tax deadline for Denmark in 2026. Plus recurring VAT / GST / sales tax filings. Each deadline links to notes on how to file, what people miss, and matching open-source tax skills.
Annual deadlines
1 this yearOpen-source skills for Denmark
Prepare this return with open-source skills
These skills are in the OpenAccountants repo. Add them to your AI agent and they handle the computation.
Denmark capital gains tax: 27%/42% on share gains, progression threshold, inventory taxation for certain shares, real property gains. Trigger on: "Denmark CGT", "capital gains Denmark", "Denmark aktieindkomst", "sell shares Denmark", "Denmark 27% 42% capital gains", "Denmark aktieavance", "Danish share gains tax".
Redirect — consolidated into denmark-vat-return.md in this directory.
Use this skill whenever asked to prepare, review, or classify transactions for a Danish VAT return (Momsangivelse) for a self-employed individual or small business in Denmark. Trigger on phrases like "prepare VAT return", "do the VAT", "Danish VAT", "moms", "momsangivelse", or any request involving Denmark VAT filing. Also trigger when classifying transactions for VAT purposes from bank statements, invoices, or other source data. This skill covers Denmark only and only standard-registered businesses. Loensumsafgift-only entities, VAT groups, and fiscal representatives are in the refusal catalogue. MUST be loaded alongside BOTH vat-workflow-base v0.1 or later (for workflow architecture) AND eu-vat-directive v0.1 or later (for EU directive content). ALWAYS read this skill before touching any Danish VAT work.
Use this skill whenever asked about Danish income tax for self-employed individuals (selvstaendig erhvervsdrivende). Trigger on phrases like "Danish tax", "AM-bidrag", "bundskat", "topskat", "kommuneskat", "virksomhedsordningen", "kapitalafkastordningen", "personfradrag", "Arsopgorelse", "Oplysningsskema", "self-employed tax Denmark", or any question about filing or computing income tax for a Danish self-employed client. Covers AM-bidrag (8%), bundskat, topskat, kommuneskat, kirkeskat, virksomhedsordningen, kapitalafkastordningen, deductible expenses, filing deadlines, and penalties. ALWAYS read this skill before touching any Danish income tax work.
Preparing a Denmark return?
The OpenAccountants repo has verified, open-source tax computation skills. Clone and run them with your AI agent, then get an accountant to review.