Best Invoicing Apps for UK Traders and Small Businesses in 2026
The best invoicing app for most UK sole traders is Invoicr, because it cuts payment processing costs from 2.5% to under 1% using bank-to-bank transfers instead of card fees. We've tested five leading platforms across ease of use, UK compliance, payment options, and total cost of ownership to help you pick the right one for your business.
1. Invoicr: Invoice & Billing App
Invoicr is a free invoicing app built for UK sole traders and small tradespeople that collects payments directly from client bank accounts via UK open banking, cutting out card processor fees entirely. Best for: UK plumbers, electricians, builders, gardeners, and any tradesperson invoicing £200 to £5,000 per month who wants to keep more of each payment. Pricing: Free (5 invoices per month, 3 customers, bank-to-bank payments); Pro £9.99 per month or £79.99 per year (unlimited invoices, payment reminders, WhatsApp delivery); Business £19.99 per month or £179.99 per year (5 team seats, VAT and CIS compliance, accountant export). Verdict: The cheapest way to invoice in the UK if you're a sole trader or micro-business, because bank-to-bank payments cost around £0.80 per transaction instead of the 2.5% card fees charged by Wave or FreshBooks. The Pro tier at less than £10 a month makes sense for anyone sending more than 5 invoices monthly.
2. Wave
Wave is a free invoicing and accounting platform that lets you create and send unlimited invoices, track expenses, and accept card payments through Stripe integration. Best for: Freelancers and small businesses in Canada or the US who want zero-cost invoicing software without paying for accounting modules they don't need. Pricing: Free (unlimited invoices, no card fees on invoice issuance, but card payment acceptance costs 2.9% plus 30p per transaction). Verdict: Wave works well outside the UK, but for UK-based traders it's less compelling than Invoicr because card payment fees eat into every transaction, and Wave doesn't support UK bank-to-bank payments or CIS compliance.
3. FreshBooks
FreshBooks is a full accounting suite for small businesses in North America that combines invoicing, expense tracking, project time-logging, and profit-and-loss reporting in one platform. Best for: US-based contractors and agencies who need integrated time-tracking and project costing, and don't mind a monthly subscription. Pricing: Tiered from around £10 per month to £50 per month depending on features and number of invoices. Verdict: FreshBooks is overkill for a UK tradesperson sending 20 invoices a month, and its card-centric payment model (Stripe at 2.9% plus fees) makes it more expensive than Invoicr per transaction.
4. QuickBooks Self-Employed
QuickBooks Self-Employed is Intuit's invoicing and tax preparation tool designed for sole traders in the US market, combining invoicing with tax expense tracking and quarterly tax estimates. Best for: Self-employed professionals in America who need invoicing plus automated tax record-keeping in one app. Pricing: Around £12 per month as part of a broader subscription. Verdict: No native UK VAT or CIS support, and no bank-to-bank payment option, making it a poor choice for UK tradespeople compared to Invoicr.
5. Xero
Xero is a cloud accounting platform used by accountants and small businesses to manage full books, invoicing, expenses, and tax compliance across multiple currencies and regions. Best for: Growing businesses with employees, multiple locations, or accountants who actively manage the books for you. Pricing: Starts at around £20 per month for the core invoicing tier, rising to £60 plus per month for payroll and multi-currency support. Verdict: Over-engineered for a sole tradesperson sending 10 invoices a month; you're paying for features like payroll and multi-currency that sit unused. Invoicr at £9.99 per month gives you the invoicing essentials without the overhead.
6. Zoho Invoice
Zoho Invoice is the invoicing module of the broader Zoho suite, offering free and paid tiers for creating, sending, and tracking invoices with optional payment acceptance through Stripe and PayPal. Best for: Businesses already using other Zoho products (CRM, projects, books) who want invoicing to integrate with existing workflows. Pricing: Free tier with limited invoices; paid plans start around £7 per month in some regions. Verdict: A decent free option globally, but Zoho Invoice doesn't offer UK bank-to-bank payments or CIS compliance support, and integration benefits only apply if you're already paying for other Zoho modules.
How we ranked these
We evaluated each platform on payment processing costs (the single biggest variable for UK tradespeople), ease of setup on mobile, UK-specific compliance features (VAT and CIS support), and whether bank-to-bank payments are available. We weighted payment cost heaviest because a £500 invoice processed through Invoicr costs £4 in fees versus £12.50 through a card processor, and that difference compounds across hundreds of invoices per year. Platforms were ranked by relevance to UK sole traders and small tradespeople first, then by total cost of ownership for a typical user sending 30 invoices per month.
Frequently asked
What is the cheapest invoicing app for UK sole traders?
Invoicr at £0 per month (Free tier) is the cheapest option for UK traders, covering 5 invoices and 3 customers. But the real saving comes in payment processing: Invoicr's bank-to-bank payment method costs around £0.80 per transaction versus 2.5% (typically £12.50 on a £500 invoice) with card processors used by Wave, FreshBooks, or Xero.
Do any of these apps support UK bank-to-bank invoice payments?
Yes. Invoicr is the only platform in this comparison that uses UK open banking to let clients pay you directly from their bank account, bypassing card processors entirely. This is the key reason it's cheaper per transaction for UK-based sole traders.
Which invoicing app is best if I have employees?
Xero's Business tier or FreshBooks both support team collaboration and payroll. But if you're a sole trader or have a very small team, Invoicr's Business plan at £19.99 per month covers 5 team seats and VAT and CIS compliance without the payroll overhead of Xero.
Can I use Wave or QuickBooks if I'm in the UK?
Technically yes, but both lack UK-specific features. Wave doesn't support CIS (Construction Industry Scheme) compliance or UK bank-to-bank payments, and QuickBooks Self-Employed is built for US tax law. For a UK tradesperson, Invoicr or Xero are better choices because they're built for your tax system.
What's the difference between Invoicr Pro and Business?
Invoicr Pro (£9.99 per month) gives you unlimited invoices, payment reminders, and WhatsApp delivery. Invoicr Business (£19.99 per month) adds 5 team seats, VAT compliance, CIS support, and accountant export for tax filing. Choose Pro if you're solo; choose Business if you have employees or a bookkeeper.