Billing for SaaS businesses

SaaS billing software
built for recurring revenue

Sell subscriptions, bill for usage and give customers a place to manage their invoices. BillingServ connects your software to billing, payments and customer records, with a flat monthly platform fee.

Start your free trialExplore the usage demo

14-day free trial · No card required · Monthly plans from £12, excluding VAT

Your pricing model

Subscriptions, usage or both

Choose what your customers pay for. BillingServ brings recurring fees and metered charges into your billing workflow.

Subscription

A predictable monthly plan

£29/month

Set up a package with a recurring price. Offer billing cycles and a trial period that suit your product.

Explore subscription billing
Usage

Charge for consumption

£0.002/request

Record API requests as usage events and apply a per-unit rate. Track consumption against each customer's order.

Explore metered billing
Hybrid

A plan with room to grow

£49/month + overage

Include an allowance in a subscription and charge for additional units. Keep the recurring fee and usage charges together.

See a billing example

Illustrative prices you could charge your customers. These are not BillingServ subscription prices.

From usage to invoice

Make the charge easy to explain

An API product includes 10,000 requests in a £49 monthly plan. A customer uses 15,000. At £0.002 for each extra request, the overage is £10.

BillingServ tracks the included allowance and billable usage. Overage is added to the next invoice, alongside the recurring charge.

See usage being recorded live
Illustrative invoice · before tax

API plan and usage

Monthly subscription
£49.00
Included requests
10,000
Total requests used
15,000
5,000 extra × £0.002
£10.00
Total before tax
£59.00

A worked example, not a customer invoice. The billable period follows your configured billing cycle.

Connect your application

A billing back office your app can work with

Use the hosted customer experience, connect through the REST API, or combine the two. Start with the parts of billing you need today.

Offer a checkout

Create packages for your plans and use a hosted checkout link to let customers place an order.

Hosted checkout API

Connect customer records

Create and manage billing customers from your application. Keep customer and order identifiers connected to your own account records.

Customer API

Report product usage

Send the order, meter and quantity to the usage API. Retrieve allowances and unbilled amounts to surface usage in your own product.

Usage event API

Build with the tools your team uses

Explore the PHP SDK, webhook documentation and REST API reference. Test checkout, invoices, usage and account changes before routing production customers through the integration. Use the usage implementation checklist for event delivery and invoice reconciliation.

Beyond collecting a payment

Keep the customer relationship with the billing record

Invoices and customer access

Customers can access invoices and payment information through your branded portal. Your team can work with the customer record and support tickets in the same platform.

Try the customer and admin demo

Plans that can change

Configure package upgrade paths and preview a package change through the API before applying it. Review the billing impact as part of your upgrade experience.

Preview a package change
Platform pricing

A flat fee for the billing platform

BillingServ does not charge a percentage of the revenue you bill. Choose your platform plan by client count and keep your own customer pricing.

Payment gateway charges are separate. Prices below exclude VAT. For annual options and the Basic plan, see the full pricing page.

Compare all BillingServ plans

Monthly plans

Starter · up to 250 clients
£12/month
Professional · up to 1,000 clients
£18/month
Business · unlimited clients
£28/month
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Choose the right fit

For SaaS teams that need billing and customer operations together

BillingServ is a fit for startups and growing software businesses that want subscriptions, usage charges, invoices, a customer portal and API access on a predictable platform fee.

Keep your own payment stack

BillingServ is billing software connected to your gateways. It is not a merchant-of-record service that takes over your seller obligations or global tax filing.

Questions before you choose

SaaS billing software questions

What does SaaS billing software do?

It connects your pricing model to customer orders, invoices and payment collection. BillingServ supports recurring packages and metered usage, with a customer portal and API for connecting your application.

Can I combine subscriptions with usage-based billing?

Yes. Add usage meters to a package, give each an included allowance and unit price, and report consumption through the API. Usage beyond the allowance is billed as overage.

Do I need to build my own checkout?

No. You can use hosted checkout links. The API is available when you need billing actions integrated into your existing application.

Does BillingServ take a percentage of SaaS revenue?

No. BillingServ charges for the platform plan, not a percentage of your billed revenue. Your payment provider's processing charges remain separate.

How can I test the integration?

Start with the billing demo or usage demo. In your trial, configure a test package and use your gateway's supported test environment to check the full checkout and billing process.

Your next billing setup

Build your product. Give billing a home.

Try BillingServ with your plans, your payment providers and your billing model.

Start your 14-day free trialExplore subscription billing

No credit card required.