For a free invoicing system with payments built in, SumUp offers a surprisingly complete solution that covers more or less everything required from a legally compliant business that bills clients.
For many sole traders and small businesses, invoicing software seems like an unnecessary cost compared to manually creating one. SumUp at least removes the need for a paid subscription. It is free to sign up, and the only cost is a rate applied to online payments.
Although you can’t stylise layout or colours, it has genuinely useful functions like credit notes and quotations. Before these were added in the past few years, Square had the most advanced free invoicing software (with its own app, no less), but theirs is mostly geared towards services, not physical products requiring, say, a delivery note.
SumUp Invoices hasn’t got its own app, but you can still send and manage invoices – not quotes or other special documents – from SumUp App. Most features require Dashboard access in an internet browser.
Other potential downsides include the lack of accounting integrations (if not using SumUp Accounting) and the prominent display of a SumUp payment link in email invoices.
Even if you instruct clients to pay via other means, you can’t disable the SumUp link so clients may still opt for this, resulting in a transaction fee for you. That’s the trade-off for this otherwise excellent free invoicing software.