For UK B2B recurring revenue, direct debit (via GoCardless, BryxoPay, or bank-native rails) is almost always cheaper and has lower involuntary churn than card payments. For B2C and one-off sales, cards win on conversion and instant capture.
The choice isn''t binary — most growing UK SMEs offer both. But for subscription businesses, getting the default payment method right moves churn, fee economics, and cash flow.
The cost difference
For a £100 recurring monthly payment in the UK:
| Method | Typical fee | Net |
|---|---|---|
| Bacs Direct Debit (via GoCardless) | ~1% + £0.20 | £98.80 |
| Bacs Direct Debit (own bank service user number) | ~£0.30 flat | £99.70 |
| UK debit card (Visa/Mastercard) | 1.4% + £0.20 | £98.40 |
| UK credit card | 1.9% + £0.20 | £97.90 |
| Amex | 2.5-3% | £97.00-97.50 |
Over 1,000 payments per month, the gap between Direct Debit at £0.30 and credit card at 1.9%+ is £15,000-£18,000 per year. For high-volume subscription businesses, this is real money.
Involuntary churn — the bigger story
"Involuntary churn" is when a payment fails despite the customer wanting to continue — expired card, declined transaction, fraud block. Industry benchmarks:
- Cards: 5-10% of recurring charges fail on the first attempt. Aggressive smart retry / dunning recovers 40-60%, leaving 2-5% net annual involuntary churn.
- Direct Debit: ~1% of payments fail. Recovery is also higher because the mandate doesn''t expire.
For a SaaS business with 80% gross retention, an extra 3% involuntary churn cuts the lifetime value of every customer by roughly 15-20%. Direct Debit pays for itself just in retention.
Where cards still win
- B2C and one-off sales — customers expect a card flow; direct debit feels heavy.
- International — direct debit infrastructure varies wildly by country. Cards are universal.
- Instant capture — DD takes 3-5 working days to clear; cards clear in seconds.
- Sub-£20 recurring — the £0.20-£0.30 minimum fees on DD eat the margin.
How to actually set up Direct Debit
UK SMEs have three routes:
- Bacs via a processor (GoCardless, BryxoPay) — easiest, fastest setup. Processor handles the regulatory and operational burden. ~1% fee.
- Bacs via your own bank — request a Service User Number (SUN). Slower setup (4-8 weeks), more operational responsibility, but ~£0.30 per transaction. Worth it above ~£100K monthly DD volume.
- Faster Payments / Open Banking — instant clearing, often <£0.30 per payment. Newer, less customer familiarity, but growing fast for B2B.
For most SMEs starting out, GoCardless or BryxoPay is the right call. Switch to direct Bacs once volume justifies the operational overhead.
Designing for the hybrid
Most growing UK subscription businesses end up offering both, with intentional defaults:
- Default to Direct Debit for B2B annual subscriptions — the customer wants the discount, doesn''t care about payment method.
- Default to card for monthly subscriptions and self-serve signups — the friction would kill conversion.
- Offer both, let the customer choose — but make Direct Debit visible (it doesn''t convert if buried).
What to do this month
- If you''re a B2B subscription business not using Direct Debit: move your top 10 highest-value customers onto it. The savings + retention pay back the setup within a quarter.
- If your card failure rate is over 5%: implement smart retry logic and dunning. The compounding effect on retention is significant.
- If you''re sub-£10K monthly recurring revenue: don''t over-engineer. Cards via Stripe/Square get you to the next milestone.