financeb2bUK Direct Debit is not a SEPA mandate, and the difference costs money
Same idea, different machine. If you plan UK collections on SEPA assumptions, you will get the refund window, the mandate logic and the setup requirement wrong — and find out when the first collection bounces.
Both schemes let a business pull money from a customer’s account with permission, but the UK scheme differs in four ways that matter. UK Direct Debit runs on Bacs in sterling, not on SEPA in euro. Collecting requires a Service User Number, which a business either obtains itself through a sponsoring institution or borrows from a bureau. Every collection needs advance notice to the payer, typically ten working days unless a shorter period was agreed. And the Direct Debit Guarantee gives UK payers an immediate, open-ended refund right from their own bank — wider than the eight weeks a SEPA Core mandate gives.
Where the two schemes diverge
| UK Direct Debit | SEPA Direct Debit (Core) | |
|---|---|---|
| Currency | Sterling | Euro |
| Runs on | Bacs | SEPA |
| Setup needed | Service User Number, via sponsor or bureau | Creditor Identifier |
| Mandate held by | The collecting business | The creditor |
| Advance notice | Usually ten working days | Pre-notification, commonly 14 days |
| Refund window | Indefinite, under the Guarantee | Eight weeks, no reason needed |
| Unauthorised claim | Thirteen months | Thirteen months |
Scheme rules are set by Pay.UK for Bacs and by the European Payments Council for SEPA. Notice periods can be shortened by agreement in both schemes.
The Direct Debit Guarantee, and why it changes your risk
This is the part European businesses underestimate. Under the Direct Debit Guarantee, a UK payer who believes a collection was wrong can ask their own bank for an immediate refund. The bank refunds first and investigates afterwards. There is no fixed deadline, and the payer does not have to argue the case with you first.
SEPA Core gives an unconditional refund right too, but for eight weeks. The UK right is open-ended in practice, which means a disputed collection from a year ago can still come back. It is not a reason to avoid the scheme — British consumers and businesses trust it precisely because of this — but it belongs in your cash planning and your dispute process.
The Service User Number, and the two ways to get one
You cannot simply start collecting. Bacs identifies every collecting organisation by a Service User Number, and getting one is a deliberate process.
- Your own SUN. Sponsored by a bank or payment institution, which assesses your financial standing and your processes. Slower to arrange, and it means your own name appears on the customer’s statement.
- A bureau’s SUN. A Bacs-approved bureau collects on your behalf under their number. Faster to start, usually with per-collection pricing, and their name may appear instead of yours.
Which route fits depends on volume and on how much the statement entry matters to your brand. We have a separate guide on choosing a bureau and what approval involves.
Collecting in the UK needs a UK account first. Direct Debit itself is free on our partner’s UK and EU tariffs.
See the pricingAUDDIS, and the vocabulary around it
Three more words you will meet and nobody will define.
- AUDDIS — Automated Direct Debit Instruction Service. The electronic lodging of mandates with the payer’s bank, instead of posting paper. Almost all new collectors are set up this way.
- ADDACS — the message service that tells you a mandate was cancelled, amended or the payer has moved. Ignoring these reports is the usual cause of avoidable failed collections.
- Advance notice — the statement you must give the payer before each collection: the amount and the date. Ten working days is the default; a shorter period can be agreed and written into the mandate.
What this means for a business based in the EU
If your customers are in Britain and pay in sterling, SEPA will not reach them and your euro mandate is irrelevant. You need a sterling account on the UK rails, and a route to a SUN.
Through our partner Gemba, an FCA-authorised payment institution (FRN 804853), Direct Debit is free on both the UK and the EU tariff, and the account carries real UK details so the collections look domestic to your customers. A company registered in the EU falls into the EU column: £69 a month for the account. Gemba is not a bank — funds are safeguarded rather than FSCS-protected.
Questions people actually ask
Can I use a SEPA Direct Debit mandate to collect from a UK customer?
What is the Direct Debit Guarantee?
How long is the refund window compared with SEPA?
What is a Service User Number?
How much advance notice must I give before collecting?
What does AUDDIS mean?
Does a company outside the UK need a UK account to collect by Direct Debit?
Sources
- Pay.UK — Bacs scheme rules, the Direct Debit Guarantee, AUDDIS and ADDACS.
- European Payments Council — SEPA Direct Debit Core rulebook, including the eight-week refund right.
- Gemba corporate fee schedule, ge.mba/pages/corporate-fees, checked 22 October 2026.
Collect from UK customers without a UK company.
Real UK account details and Direct Debit at no per-collection charge on the UK and EU tariffs. We will also tell you when a bureau is the better route than your own SUN.