Yes. Most small UK businesses collect direct debits through a provider, so they never apply for a Service User Number or a bank facility of their own. Getting your own SUN means a bank agreeing to sponsor you after checking your finances, which many small and young businesses find hard. Through a provider you go through its checks instead, and the obligations on each collection, such as advance notice, stay with you either way.
In this article
The short version
- Yes: most small businesses collect direct debits through a provider, with no SUN of their own.
- Getting your own SUN means a bank sponsoring you after checks much like a lending decision.
- A standard bureau still needs your own SUN; a facilities management or payment provider doesn't.
- Advance notice, accurate billing and acting on cancellations stay your responsibility either way.
- Adfin needs no SUN or bank facility, and can show your own name on statements for £36 a month.
Ways to collect without your own SUN
A Service User Number is the six-digit number Bacs gives an organisation that's authorised to collect direct debits. Bacs itself says indirect access is often the most suitable route for smaller organisations, and there are two ways to do it without a number of your own:
- A Bacs-approved facilities management provider acts as the service user for businesses that don't have their own SUN, and signs the indemnity to the bank on their behalf.
- A payment provider collects direct debits through its own arrangements and regulated partners. You sign up with the provider and never deal with Bacs or a sponsoring bank.
A standard Bacs bureau is different. It submits payment files for organisations that already have their own SUN, so it doesn't help if you haven't got one.
For most small businesses the payment provider route tends to be the simplest, because the mandate forms, the online sign-up and the reports from the banks are all built in.
Why your own SUN is hard to get
To get your own SUN, a bank has to agree to sponsor you into the scheme. Bacs says applicants are checked for integrity, financial standing and administrative capability, and that the checks include a credit check, because a sponsoring bank takes on risk when it lets a business collect.
That risk comes from the Direct Debit Guarantee. If a customer says a payment was taken in error, their bank refunds them straight away and then claims the money back from whoever collected it. If that business can't pay, the sponsoring bank is left with the loss. So banks tend to treat a direct debit facility much like lending, and some ask for a business current account with them and approval of a credit facility first.
No UK bank publishes a minimum turnover or trading history, and each decides in its own way. In practice a young company, a business with thin accounts or a sole trader can be turned down however well run it is. And if the bank says yes, there's still setup to do: Bacs software, security smartcards and testing, plus the bank's monthly, per-item and per-file charges.
What stays your responsibility
Collecting through a provider takes the bank relationship off your hands. It doesn't change what you owe your customers on every collection:
- Advance notice: your customer must know the amount and date before each collection, and again if either changes.
- Collecting what you said: the amount and date you take should match the notice.
- Accurate billing: if a wrong amount is collected, your customer's bank refunds them under the Guarantee and the money comes back out of your account.
- Acting on cancellations: when a customer cancels a mandate, stop collecting and ask how they'd like to pay instead.
The provider handles the paperwork around this. Its mandate form already follows the Bacs wording, it lodges each mandate with the customer's bank, and it passes on any claim. But the invoice and the notice are still yours, so it's worth checking they're right before each run.
How to start collecting through a provider
Starting with a provider looks like this:
- Sign up and verify your business. The provider checks who you are and your business bank account.
- Decide what name your customers see. By default, their statement shows the provider's name. Some providers let you show your own for a monthly fee.
- Send mandate links. Customers sign online by email, text or WhatsApp in a couple of steps.
- Collect. Your customer gets notice of each amount and date, and the money is paid to you a few working days after each collection.
Adfin works this way. You don't need your own SUN or a bank facility. Adfin runs its own checks and usually a short onboarding call before you go live, and charges 1% + 20p per successful payment, with the 1% capped at £4 on direct debit, no monthly fee and no contract. Your customers see Adfin on their statement unless you choose at onboarding to show your own business name, for £36 a month. Its AI Customer Agents can chase customers who haven't signed their mandate, within rules you set.
If you already collect direct debits through another provider and want to move, your customers don't have to sign again when you have 10 or more mandates: they move through the Bacs bulk change process. With fewer than 10, each customer signs a new mandate.
Common questions
Can I take direct debit without a Service User Number? Yes. A payment provider or facilities management provider collects for you, so you don't need a SUN or a bank facility of your own.
Why do banks turn down small businesses for direct debit? A sponsoring bank carries the risk of refund claims if the business can't repay them, so it checks finances much like a lending decision. Thin accounts or a short trading history can fail that test.
Is a Bacs bureau the same as a provider that collects for me? No. A bureau submits files for businesses that already have their own SUN. A facilities management or payment provider collects without you needing one.
Whose name will my customers see on their bank statement? Usually the provider's. With Adfin you can show your own business name for £36 a month, chosen at onboarding.
What am I still responsible for if I use a provider? Advance notice of each amount and date, collecting what you said you would, and accurate billing. A wrong collection can be refunded to your customer and recovered from you.
Can I move to my own SUN later? Yes, if a bank agrees to sponsor you. Ask your provider and the bank how your existing mandates would move before you apply.
Sources
- Bacs - Direct Debit, getting started (accurate as of October 2026) https://www.bacs.co.uk/bacs-schemes/getting-started/direct-debit/
- Bacs - The Little Bacs Guide to Becoming a User of Direct Debit (accurate as of October 2026) https://www.bacs.co.uk/media/njcjsrmb/little_bacs_guide_to_becoming_a_user_of_direct_debit.pdf
- Bacs - Direct Debit Facilities Management (accurate as of October 2026) https://www.bacs.co.uk/media/dg4pbsky/bacs-fm-direct-debit-v50.pdf
- Pay.UK (Direct Debit) - The Direct Debit Guarantee (accurate as of October 2026) https://www.directdebit.co.uk/direct-debit-explained/direct-debit-guarantee/
- Adfin - Pricing (accurate as of October 2026) https://www.adfin.com/pricing
