ZZP Income Tax (Inkomstenbelasting)
Dutch annual income tax return deadline for individuals including ZZP'ers (self-employed without personnel). Extension available to September 1, 2026 on request.
Filing deadline
May 1, 2026
- Country
- Netherlands
- Tax year
- 2025
- Extension
- 2026-09-01
- Official
- Tax authority
What is this deadline?
The annual Inkomstenbelasting return for 2025 — includes ZZP (zelfstandige zonder personeel) self-employed individuals and regular residents.
Who needs to file?
- Every Dutch tax resident with income
- ZZP'ers: self-employed without employees
- Anyone with Box 3 assets above the threshold
Key dates
- Standard deadline: May 1, 2026
- Automatic extension on request: September 1, 2026
How to file
- Mijn Belastingdienst via DigiD
- Online tax software (Taxfix NL, Tangram)
- Boekhouder or belastingadviseur
What people miss
- Zelfstandigenaftrek (self-employment deduction) — €2,470 for 2025, phasing down further each year to €900 by 2027
- Startersaftrek — additional €2,123 for new entrepreneurs (first 3 of 5 years)
- MKB-winstvrijstelling — 13.31% of profit (after self-employment deduction) for 2025 is tax-free
- Uren-criterium — you must work 1,225+ hours/year in your business to qualify for the self-employment deduction
- Box 3 — wealth tax regime changed significantly in 2023, actual vs notional returns now matter
If you miss the deadline
- Late filing fine starting at €385
- Additional fines for continued non-filing
- Request the extension proactively — it's free and automatic
Prepare this return with open-source skills
These skills are in the OpenAccountants repo. Clone them into Claude, Cursor, or any AI agent and they handle the computation.
Use this skill whenever asked about Netherlands income tax for self-employed individuals (zzp'ers, eenmanszaak). Trigger on phrases like "aangifte inkomstenbelasting", "income tax return Netherlands", "zelfstandigenaftrek", "startersaftrek", "MKB-winstvrijstelling", "urencriterium", "Box 1 income", "Box 3 wealth tax", "heffingskortingen", "arbeidskorting", "KIA investment deduction", "self-employed tax Netherlands", "winst uit onderneming", or any question about filing or computing income tax for a Dutch zzp'er or eenmanszaak. Also trigger when preparing or reviewing an aangifte IB, computing deductible expenses, or advising on voorlopige aanslagen. This skill covers Box 1 progressive rates, entrepreneur deductions, capital allowances, tax credits, Box 3 savings/investment income, filing deadlines, and penalties. ALWAYS read this skill before touching any Dutch income tax work.
Use this skill whenever asked about Dutch self-employed (zzp) tax deductions. Trigger on phrases like "zelfstandigenaftrek", "startersaftrek", "MKB-winstvrijstelling", "urencriterium", "1225 hours", "KIA", "kleinschaligheidsinvesteringsaftrek", "FOR", "fiscale oudedagsreserve", "meewerkaftrek", "willekeurige afschrijving", "zzp deductions", "Dutch freelancer deductions", "Netherlands self-employed tax benefits", or any question about tax deductions available to Dutch sole proprietors (eenmanszaak) and freelancers (zzp'ers). This skill covers all major ondernemersaftrek components, the MKB-winstvrijstelling, investment deductions, the hours criterion, and their interaction with Box 1 computation. ALWAYS read this skill before touching any Dutch self-employed deduction work.
This page is informational only and not tax advice. Verify dates and requirements against the official tax authority before filing.