Short answer
Every successful payment generates an emailed receipt, and each threshold charge has its own invoice. Add a VAT or other tax ID under Billing > Settings; the available types depend on your billing country, and a new tax ID only applies to future invoices.
Tips for finance teams
- Use a shared finance mailbox as the invoice email
- Add the tax ID before the first charge
- Expect several invoices a month while thresholds are low
- Billing entity and currency can't be changed self-serve
Questions
Does OpenAI give tax advice?
No. Ask your accountant how to treat the invoices, for example reverse charge in the EU.
Facts checked against the sources below on 12 October 2026. Platforms change quickly: if something here no longer matches what you see, tell us and we will update it.
