What is a self-billing invoice? (And why payout-heavy companies need them)
A self-billing invoice is an invoice issued by the customer instead of the supplier. The buyer prepares the invoice on the supplier's behalf, and legally it counts as the supplier's own sales invoice. The money and the paperwork flow in the same direction: you calculate what you owe, you pay it, and you issue the document that proves it.
It sounds backwards until you see where it's used. If your company pays many freelancers, creators, affiliates, or suppliers, it is one of the most practical invoicing arrangements available, and one of the least known.
Why self-billing exists
Normal invoicing assumes the supplier knows what to charge. In payout-heavy businesses, they don't; the payer computes the amount:
- a creator platform calculates earnings from views or sales,
- an affiliate network calculates commission from tracked conversions,
- a marketplace calculates a seller's settlement after fees and refunds.
Asking thousands of recipients to each write a correct invoice for a number only you know produces exactly what you'd expect: missing invoices, wrong amounts, wrong VAT treatment, and an accounts-payable team doing data entry against its own records. Self-billing removes the round-trip: the party with the numbers issues the document.
What makes a self-billing invoice valid
Requirements vary by country, but across the EU, UK, and most VAT jurisdictions the pattern is consistent:
- A prior agreement. The supplier must formally agree, before the first invoice, that the customer issues invoices on their behalf and that they will not issue their own for the same supplies. Keep it on file; this agreement is what auditors ask for first.
- The invoice says so. The document must be clearly marked "Self-billing".
- Full invoice content. Everything a normal invoice needs: both parties' names, addresses, and VAT numbers, date, description, amount, and a sequential invoice number from a numbering series consistent for that supplier.
- Correct VAT treatment. For cross-border B2B services, that usually means reverse charge: no VAT is charged on the invoice, and the buyer accounts for VAT in their own country. The invoice must say "Reverse charge". For domestic self-billing, VAT appears on the invoice as normal.
Where it goes wrong in practice: no agreement on file, missing VAT numbers, numbering gaps, or the mandatory wording forgotten. Each one is a small omission that turns into an audit finding years later.
Self-billing in a payout flow, without the admin
This is a shipped feature of Kiip's payout tool, not a how-to you implement yourself:
- The agreement is captured at onboarding. When a business recipient sets up their profile, they read and accept a self-billing agreement, recorded with a timestamp before any invoice is issued.
- Invoices are generated automatically. When a payout completes, Kiip generates the invoice you issue: both
parties' details and VAT numbers, the "Self-billing" marking, "Reverse charge" where it's cross-border, and
a per-supplier sequential number series (e.g.
KP-2026-S3-000007) with no gaps. You are the issuer; the tool only makes issuing correct. - No agreement? No dead end. A business recipient who hasn't accepted the agreement is never blocked from being paid. The flow falls back to collecting the supplier's own invoice, which you attach to the payout and which ships in the same monthly document archive.
You remain the payer and the issuer; Kiip is the tool that makes issuing correct. At month end, every self-billing invoice sits in one ZIP with filenames matching your accounting import, ready to bulk-attach. (How the whole month closes: How to pay people and companies anywhere in the world.)
This article is general information, not tax advice. VAT rules differ by country, so confirm the specifics of your situation with your advisor.
Paying businesses at scale? Create your account at dashboard.kiip.app and issue correct self-billing invoices without the manual work.