Payment & Invoicing App — From £4,300

Fintech, AI & Business Tools

Payment & Invoicing App

Build your own invoicing and online payments app.

From £4,300Fixed-price build

3–5 weeksTypical timeline

100%Code ownership

What is a Payment & Invoicing App? An invoicing and payments app lets businesses create invoices, take online payments and chase late payers automatically.

Who this is for

Founders and startups with an idea, businesses that want their own branded version, and anyone who has searched for how to build a platform like this and wants a fixed price, a clear plan and full ownership of the result. No technical knowledge needed: we explain everything in plain English.

Why this price is worth it

Most UK agencies start from around £5,900 for a build like this. Ours starts from £4,300, fixed in writing before we begin.
AI-accelerated development means faster delivery without cutting corners.
You own 100% of the code, with no lock-in and no licence fees to us.
One point of contact, plain English, no account managers.

Everything included

Invoice and quote builder
Online card payment links
Automatic reminders
Client portal and history
Tax and VAT reporting
Accounting software connections
Mobile-friendly design that works on every device
Secure hosting setup, backups and launch support

How it works

Discovery call — we talk through your idea, your audience and what makes yours different.
Scope and fixed price — you receive a written scope, timeline and price before anything starts.
Design — you approve screens and the user journey before we build.
Build and review — regular progress demos so you see it come together.
Test and launch — we test thoroughly, deploy it live and hand over the full code.
Grow — optional support, new features and traffic growth once you are live.

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Need something custom or not listed? See this whole section · All platform builds

Questions people ask

How much does a Payment & Invoicing App cost?

Our price starts from £4,300. Most UK agencies start from around £5,900 for the same kind of build. The final figure depends on the features you choose and is confirmed in writing before we begin.

How long does it take?

Typically 3–5 weeks from sign-off, depending on scope. We agree a clear timeline up front.

Do I own the code?

Yes. You receive the full source code and own everything we build for you.

Can I start small and add features later?

Yes. Many clients launch a focused first version, then add features once real users arrive. We scope it so nothing has to be rebuilt later.

Do you also run the platform for me?

We specialise in building. Once live, you can run it yourself or take one of our optional support plans for monitoring and fixes.

What about licences and regulation?

We build the software. Any licences, registrations or approvals your business needs to operate (for example FCA, CQC or ICO registration, or content rights) stay with you, and we will point out where they are likely to apply.

Ready to build yours? Tell us your idea.

Independent build service. Other brands named here are used only to describe the type of platform and are not affiliated with or endorsed by us.

Payment & Invoicing App — From £4,300