Invoice Tools
Professional invoicing utilities, invoice numbering, due date calculations, and credit notes.
Invoice Generator
Create professional, EU/Belastingdienst-compliant invoices with live preview, custom VAT rates, and instant PDF/print export.
Invoice Number Generator
Generate structured, sequential invoice identifiers using prefixes, calendar years, and zero-padded sequence numbers.
Invoice Due Date Calculator
Calculate payment due dates from an invoice issue date and terms (Net 14, Net 30, Net 60, End of Month) with leap year support.
Late Payment Interest Estimator
Estimate statutory late payment interest and collection compensation under European Late Payment Directives and Dutch civil law.
Pro Forma Invoice Helper
Generate clear, legally compliant pro forma invoices with draft watermarks for advance quotations and customs declarations.
Credit Note Calculator
Calculate negative invoice amounts, VAT reversals, and partial refunds for returned items or billed price adjustments.
European & Dutch Commercial Invoicing Standards
Invoicing in the European Union and the Netherlands is strictly regulated under Articles 35a through 35c of the Dutch Turnover Tax Act 1968 (Wet op de omzetbelasting 1968) and European Council Directive 2006/112/EC. Failing to format commercial invoices according to statutory mandatory requirements (Factuureisen) can invalidate your client's input VAT deduction and trigger administrative penalties from the Dutch Tax Administration (Belastingdienst).
Mandatory Statutory Factuureisen Checklist
- Seller Identification: Full legal business name (matching your Chamber of Commerce / KvK dossier), registered address, KvK number, and BTW-identificatienummer.
- Buyer Details: Client's full legal trading name and registered commercial address (or permanent residence for private individuals).
- Unique Sequential Identifier: A continuous, gapless invoice number from an audited sequential series.
- Key Dates: The exact date of invoice issuance and the date of goods delivery or service completion.
- Service Breakdown: Clear, itemized description of deliverables, unit quantities, hourly tariffs, or units rendered.
- Tax Subtotals: Net taxable base separated by applicable VAT percentage rate (21%, 9%, 0%, or Reverse Charge / BTW Verlegd).
Statutory Payment Terms & Late Interest
Under Dutch law, standard B2B commercial transactions adhere to a default statutory payment window of 30 calendar days. While contracts can agree up to 60 days, exceeding 60 days is legally void unless objectively justified. If payment is delayed, entrepreneurs are legally entitled to charge Dutch Commercial Statutory Interest (12.50%) plus a mandatory minimum statutory collection compensation fee of €40.00 under Article 6:96 BW.
Frequently Asked Questions about Invoice Tools
Yes. All formulas, tax percentages, rounding conventions, and statutory guidelines are benchmarked directly against official Dutch Tax Administration (Belastingdienst) and European Union VAT Directives.
No. Rompslomp.net operates on a strict client-side architecture. Every calculation and invoice preview runs in your device's browser memory. We never store, log, or sell your financial figures.
Yes. Our Free Invoice Generator includes an integrated A4 print style sheet. Clicking "Print / Save PDF" renders a clean, professional document formatted to meet European Factuureisen standards.
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