Setting up B2B subscription billing: tools and costs in London (2026)

The verdict in three sentences

For a London SaaS company selling B2B subscriptions to customers in the UK, the EU and the Gulf, the right setup pairs a recurring billing engine (Stripe Billing or Chargebee) with the payment methods each market expects, such as Bacs Direct Debit, SEPA Direct Debit and cards. Integration costs 20,000 to 45,000 GBP depending on the number of plans, currencies and accounting connections. The return comes mainly from lower involuntary churn, around 40% less thanks to automated dunning and card updates.

Comparing recurring billing tools

The first decision is the engine that runs plans, trials, proration, dunning and invoices. Fees below are public 2026 price points to confirm against your volume.

In practice, most London SaaS firms run Stripe Billing as the single source of truth, add GoCardless or Stripe's own direct debit for UK and EU customers, and keep cards for the rest. Chargebee becomes relevant when several gateways and entities must be orchestrated.

Multi-currency and compliant invoices

A customer in Manchester pays in GBP, one in Lyon in EUR, one in Dubai in USD or AED. Each market has its own invoice requirements.

The integration budget breaks down as follows.

Where the gain comes from

Involuntary churn, meaning customers lost to an expired card or a declined payment, often makes up 20 to 40% of total churn in B2B SaaS. Three mechanisms reduce it: automated retries at day 1, 3 and 7, automatic card updates through the networks, and a pre-expiry email 15 days ahead. The observed order of magnitude is a 40% reduction of that churn.

Mini case study

Oliver, founder of a London workflow software company, bills 380 customers: 220 in the UK, 110 in the EU and 50 in the Gulf, for 95,000 GBP MRR. Invoices are built by hand in a spreadsheet, and he loses about 1.2% of MRR every month to unrecovered payments. He integrates Stripe Billing with Bacs and SEPA direct debit for 32,000 GBP. Involuntary churn falls by 40%, so 0.48% of MRR retained each month, about 456 GBP of MRR saved monthly, which compounds: after 12 months roughly 5,500 GBP of extra MRR, or about 35,000 GBP of cumulative revenue over the year. He also frees 3 days a month of admin work, about 9,000 GBP a year. Net of Stripe Billing fees (about 8,000 GBP a year), payback lands around 11 months, with growing gains afterwards.

FAQ

Is Stripe Billing enough for a UK SaaS?

For most companies under 30,000 USD MRR with one entity, yes. At 0.7% of billed volume it is usually cheaper than Chargebee's 599 USD monthly fee.

Should UK customers pay by card or direct debit?

Direct debit for annual and large monthly contracts: Bacs fees are around 1% plus 20p, capped, and failure rates are lower than cards. Cards remain simpler for self-serve plans.

When is Chargebee worth it?

Above 30,000 USD MRR with several gateways or entities, thanks to reporting and revenue recognition. Below that, the fixed fee rarely pays off.

How do we handle VAT across markets?

The engine applies one rule per billing country: 20% UK VAT, reverse charge for EU B2B with a valid VAT ID, and Gulf rules where applicable. Have your accountant validate the setup before go-live.

How long does setup take?

Between 6 and 10 weeks, including migration of existing customers. The switch is usually timed with a monthly renewal date.

Let's scope your project. Describe your plans, currencies and customer countries, and we will price the integration between 20,000 and 45,000 GBP with a 6 to 10 week timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.