No, not on its own. Every direct debit collection needs advance notice of its amount and date, so a provider can't quietly add last month's failed payment to this month's. The missed amount stays owed as its own payment, and you collect it by retrying it, by a separate collection the customer has been told about, or by sending them a way to pay.
In this article
The short version
- A failed direct debit isn't added to the next collection automatically.
- Each collection needs advance notice of its amount and date, so an arrear can't be added quietly.
- Collect the missed amount by a retry, a separate collection with notice, or a payment link.
- Taking a catch-up amount without notice lets the customer claim an immediate refund under the Direct Debit Guarantee.
- Adfin retries failed collections free, then tries a saved card or sends a payment link, and keeps chasing the open invoice.
Why a failed payment doesn't roll into the next one
A direct debit mandate gives you permission to collect from your customer's account. It doesn't fix the amount. Each collection is set up separately, and your customer has to be told the amount and date before it's taken.
Under the Bacs scheme, that notice is 10 working days plus postal time by default, unless you've agreed a different period with the customer. If next month's collection was announced as £600 and you take £1,200 because last month failed, you've collected an amount the customer wasn't told about.
Providers handle failed payments as payments in their own right. GoCardless, for example, lets you resubmit a failed payment up to three times from your dashboard, and after that you'd create a new payment, such as a one-off, to try again. In neither case does the missed amount join the next scheduled collection by itself.
So if you've been waiting for the next run to sort out a failure, it's likely the arrear is still sitting there. A quick look at your unpaid invoices after each collection date will usually show it.
Three ways to collect the missed amount
Each one works under the same mandate, or alongside it, and none of them needs your customer to sign anything new.
- Retry the failed payment. If it failed for lack of funds, a retry once the money's in often goes through. Check the return reason first, because a cancelled mandate or closed account can't be retried.
- Raise a separate collection for the missed amount. Give the customer notice of the amount and date, the same as any other collection, and say clearly what it's for.
- Send a payment link. Your customer pays the missed amount by card or pay by bank when it suits them, and the direct debit carries on as normal for the next invoice.
If you'd like to collect two months together, you can, provided the customer has notice of the combined amount and the date. Agree it with them first. A doubled collection they weren't expecting is more likely to fail again, or to prompt a call to their bank.
For customers who've failed more than once, a short conversation tends to work better than another attempt. Ask when the money will be in, and offer to split the arrear if paying it in one go is the problem.
How the Direct Debit Guarantee affects a catch-up collection
Every direct debit carries the Direct Debit Guarantee. It promises the payer notice of any change to the amount, date or frequency (normally 10 working days, or as otherwise agreed), and a full and immediate refund from their bank if an error is made.
If you add a missed amount to a collection without notice, your customer can ask their bank for that refund straight away. The bank then reclaims the money from your provider, and the provider recovers it from you. You're back to an unpaid invoice, with a customer who's now less likely to trust the next collection.
The Guarantee doesn't cancel the debt. Your customer still owes the invoice on the terms you agreed. It governs how you collect it, so give notice before any catch-up collection.
When a collection fails in Adfin
In Adfin, each direct debit collection is tied to one invoice and uses that invoice's amount and due date. A failed collection stays with its own invoice, and the missed amount isn't added to the next month's collection. Your customer is told at least three working days before each collection, with the amount and date.
When a collection fails, it's retried for free, between one and three times depending on how you've set it up. If those retries fail too, a card the customer has saved can be tried, and they're told one business day before it's charged, or they can be sent a payment link to pay another way. There's no charge to you for the failed payment.
If the invoice is still unpaid after that, it stays open and Adfin's collection agents chase it like any other unpaid invoice, within the rules you approve. Next month's invoice is collected as normal, for its own amount.
Common questions
Does the customer still owe the money if their direct debit fails? Yes. A failed or returned collection doesn't change what's owed under your agreement, and the invoice stays unpaid until it's collected another way.
Can I add a failed payment to next month's direct debit? Only if your customer has notice of the new combined amount and date before it's taken. It's usually clearer to collect the missed amount separately so each payment matches one invoice.
How many times can a failed direct debit be retried? It depends on your provider and your settings. Adfin retries a failed collection between one and three times, for free, and can then try a saved card or send a payment link.
What if the mandate was cancelled? A collection can't be retried on a cancelled mandate. Contact the customer, ask them to set up a new mandate or pay the missed amount another way, such as by a payment link.
Do I get charged for a failed direct debit? Some providers charge a fee on every payment submitted, whether or not it succeeds. Adfin charges nothing when a payment fails.
Can my customer claim a refund for a catch-up collection? If it was taken without the notice they're entitled to, they can ask their bank for an immediate refund under the Direct Debit Guarantee. Giving notice of the amount and date first avoids that.
Sources
- Bacs - FAQs (accurate as of November 2026) https://www.bacs.co.uk/resources/faqs/
- Direct Debit - The Direct Debit Guarantee (accurate as of November 2026) https://www.directdebit.co.uk/direct-debit-explained/direct-debit-guarantee/
- GoCardless Support Centre - Retrying a failed payment (accurate as of November 2026) https://support.gocardless.com/hc/en-gb/articles/115002900765-Retrying-a-failed-payment
- Adfin Help Centre - What does my customer see when I use direct debit? (accurate as of November 2026) https://support.adfin.com/en/articles/10199778-what-does-my-customer-see-when-i-use-direct-debit
