Netherlands tax deadlines 2026.

Use this skill whenever asked about forming, incorporating, or registering a company in the Netherlands. Trigger on phrases like "set up a company in the Netherlands", "Dutch BV", "BV formation", "KvK registration", "Kamer van Koophandel", "Dutch company formation", "register a business Netherlands", "besloten vennootschap", "eenmanszaak", "VOF", "NV formation", "DGA salary", or any question about starting a business entity in the Netherlands. Covers entity types (BV, NV, eenmanszaak, VOF, CV), registration process, capital requirements, costs, post-formation compliance, and bank account opening. ALWAYS read this skill before advising on Dutch company formation.

Use this skill whenever asked to prepare, review, or classify transactions for a Netherlands VAT return (OB aangifte / btw-aangifte) for a self-employed individual or small business in the Netherlands. Trigger on phrases like "prepare OB aangifte", "Dutch VAT return", "BTW aangifte", "classify transactions for Dutch VAT", or any request involving Netherlands VAT filing. This skill covers the Netherlands only, standard BTW regime. Kleineondernemersregeling (KOR), partial exemption, margin scheme (margeregeling), and VAT groups (fiscale eenheid) are in the refusal catalogue. MUST be loaded alongside BOTH vat-workflow-base v0.1 or later AND eu-vat-directive v0.1 or later. ALWAYS read this skill before touching any Dutch VAT work.

Use this skill whenever asked about Dutch tax objection procedures (bezwaar) or tax correspondence with the Belastingdienst. Trigger on phrases like "bezwaar", "bezwaarschrift", "objection letter", "tax objection Netherlands", "reactie op aanslag", "aanslag betwisten", "bezwaartermijn", "6 weken termijn", "ambtshalve vermindering", "beroep belastingrechter", "motiveringsbrief", "tax appeal NL", "machtiging belastingdienst", "pro forma bezwaar", "uitspraak op bezwaar", "hoorzitting", or any question about objecting to a Dutch tax assessment, responding to Belastingdienst correspondence, or preparing tax dispute documentation. This skill covers the bezwaar procedure, deadlines, required elements, escalation to beroep, and correspondence templates. ALWAYS read this skill before drafting any Dutch tax objection or Belastingdienst correspondence.

Use this skill whenever asked about Dutch payroll, loonheffing, wage tax, social security contributions, or employer obligations in the Netherlands. Trigger on phrases like "loonheffing", "loonbelasting", "Dutch payroll", "Netherlands payroll", "volksverzekeringen", "AOW premie", "WW premie", "WAO", "WIA", "Aof", "Awf", "ZVW", "Zvw bijdrage", "zorgverzekeringswet", "vakantiegeld", "holiday allowance", "loonaangifte", "30% ruling", "werkgeversheffing", "minimumloon", "minimum wage Netherlands", "payslip Netherlands", "loonstrook", "social insurance Netherlands", or any question about running payroll in the Netherlands. ALWAYS read this skill before processing any Dutch payroll work.

ALWAYS USE THIS SKILL when a user asks for help preparing their Netherlands tax returns AND mentions freelancing, self-employment, ZZP, eenmanszaak, or sole proprietorship. Trigger on phrases like "help me do my taxes", "prepare my IB-aangifte", "I'm a ZZP'er in the Netherlands", "I'm a freelancer in the Netherlands", "do my taxes as a contractor", "prepare my BTW return and income tax", or any similar phrasing where the user is a Netherlands-resident self-employed individual needing tax return preparation. This is the REQUIRED entry point for the Netherlands self-employed tax workflow -- every other skill in the stack (nl-btw-return, nl-income-tax, nl-zvw, nl-return-assembly) depends on this skill running first to produce a structured intake package. Uses upload-first workflow -- the user dumps all their documents and the skill infers as much as possible before asking questions. Uses ask_user_input_v0 for structured questions instead of one-at-a-time prose. Built for speed. Netherlands full-year residents only; self-employed individuals and sole proprietors.

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.

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Use this skill whenever asked about Dutch tax deductions and special schemes (aftrekposten en regelingen) beyond self-employed deductions. Trigger on phrases like "aftrekposten", "belastingaftrek", "deductions Netherlands", "hypotheekrenteaftrek", "mortgage interest deduction", "eigenwoningforfait", "specifieke zorgkosten", "giftenaftrek", "studiekosten", "alimentatie aftrek", "persoonsgebonden aftrek", "partnerregeling", "heffingskorting", "ouderenkorting", "jonggehandicaptenkorting", "levensloopvrijstelling", "box 3 vrijstelling", "groene belegging", "ANBI", "kom ik in aanmerking", "tax deduction check NL", or any question about Dutch individual or business tax deductions, credits, or special regimes. This skill covers persoonsgebonden aftrek, hypotheekrenteaftrek, zorgkosten, giften, heffingskortingen, and business investment schemes. ALWAYS read this skill before advising on Dutch deduction eligibility.