SMB invoicing from quote to payment: the complete guide

Quote, invoice, reminder, demand letter, bookkeeping, VAT return. The entire chain explained for business owners who handle it themselves or with minimal accountant support.

For many business owners, invoicing is the dullest yet most critical process in their company. This guide walks through the entire chain, with pointers to deeper reading on each topic.

1. Quote / proposal

A well-written quote is legally an offer. Once the client accepts, you have a binding agreement. Pay attention to the validity period, payment terms, and whether VAT is included or excluded.

2. Invoice

The Dutch Tax Authority has fixed requirements (see invoice requirements in the Netherlands). The must-haves: invoice number, date, VAT number, VAT breakdown.

3. Delivery and format

PDF by email is the standard. For government contracts, UBL/PEPPOL is mandatory. Large business clients are increasingly requesting it too.

4. Payment terms and follow-up

30 days is the standard in the Netherlands; 14 or 7 days for smaller clients. Automated payment reminders on day 7 after the due date saves a lot of phone calls.

5. VAT return

Quarterly or monthly, depending on your turnover. Check VAT 9% vs 21% if you're unsure which rates apply.

6. Bad debts

Client doesn't pay. After a demand letter and debt collection, you eventually write it off. See bad debts.

7. Recurring invoices

If you sell subscriptions or SaaS, you need to automate recurring billing. This can cut your invoicing time by 80%.

8. International

Foreign clients bring VAT reverse charge, different currencies, and additional requirements. See invoicing internationally.

Further reading: credit notes, invoice number policy, direct debit vs manual payment, invoice in Dutch + English.