Choosing the right invoicing software can save you hours every month and help you get paid faster. But with so many options, how do you pick the best one for your UK freelance business? We compared the five most popular tools so you don't have to.
Why Freelancers Need Invoicing Software
If you're still creating invoices in Excel or Word, you're making life harder than it needs to be. Manual templates come with hidden costs:
- No automation — manually updating invoice numbers, dates, and totals every time.
- No payment tracking — no way to see which invoices are overdue at a glance.
- No HMRC compliance — miss a required field and risk penalties.
- No payment links — every extra step between invoice and payment costs you days of waiting.
- No MTD support — Making Tax Digital requires digital record-keeping. A Word document doesn't qualify.
What to Look For
- HMRC compliance — sequential numbering, VAT breakdowns, registered business details.
- MTD-ready — mandatory for VAT-registered businesses, expanding to income tax.
- Automatic payment reminders — stop chasing late invoices manually.
- Mobile access — create and send invoices from your phone.
- Genuine free plan — not just a 14-day trial.
- AI features — draft invoices, suggest line items, flag errors.
- Accountant portal — seamless sharing, no CSV email chains.
Side-by-Side Comparison
| Feature | PrimeInvo | FreeAgent | QuickBooks | Wave | Xero |
|---|---|---|---|---|---|
| Free plan | Yes (5 inv/mo) | No (trial) | No (trial) | Yes | No (trial) |
| Starting price | Free / £12.99/mo | £14.50/mo | £12/mo | Free | £15/mo |
| MTD for VAT | Yes | Yes | Yes | No | Yes |
| AI assistant | Yes | No | Limited | No | Limited |
| Auto-chase | Yes | Yes | Yes | No | Yes |
| UK-native | Built for UK | Built for UK | US-adapted | US-focused | NZ-adapted |
| Accountant portal | Yes | Yes | Yes | No | Yes |
| Mobile app | Yes | Yes | Yes | Yes | Yes |
Detailed Breakdown
PrimeInvo
Built specifically for UK freelancers and small businesses. The free plan includes up to five invoices per month with no time limit — a permanent free tier, not a trial. Paid plans (from £12.99/mo) unlock unlimited invoicing, an AI assistant that drafts invoices and spots errors, auto-chase payment reminders, and a dedicated accountant portal.
Fully MTD-compliant with native GBP formatting, UK date conventions, and HMRC-compliant invoice templates out of the box.
FreeAgent
Well-established UK accounting platform with time tracking, expense management, and bank feeds alongside invoicing. Free through some banks (NatWest, RBS), otherwise £14.50/mo. Feature-rich but potentially more than a freelancer needs for invoicing alone.
QuickBooks
Global accounting giant starting at £12/mo. Includes invoicing, expense tracking, and MTD compliance. Originally US-built — some UK users find the interface less intuitive for British tax requirements. Powerful but can feel over-engineered for simple invoicing.
Wave
Genuinely free for invoicing and accounting, but designed for North America. No MTD support, limited UK-specific features. Decent stopgap if you're not VAT-registered, but most UK freelancers outgrow it quickly.
Xero
Popular cloud accounting platform from New Zealand, widely used in the UK. From £15/mo with solid invoicing and hundreds of third-party integrations. Strong accountant ecosystem, but expensive if you only need invoicing.
The Verdict
| If you are... | Best choice | Why |
|---|---|---|
| A freelancer who wants free, compliant invoicing | PrimeInvo | Permanent free plan, MTD-ready, UK-native |
| A sole trader banking with NatWest/RBS | FreeAgent | Free through your bank, full accounting included |
| A growing business needing full accounting | Xero | Huge app ecosystem, strong accountant network |
| Someone who wants AI help + auto-chasing | PrimeInvo | Built-in AI assistant and auto-chase on all paid plans |
For most UK freelancers, if you want a free, simple, legally compliant way to send invoices and get paid — without paying £12–15/mo for accounting features you'll never use — PrimeInvo is the strongest option in 2026.
FAQ
Is free invoicing software really free?
Depends on the provider. Wave is entirely free but monetises through payment processing fees. PrimeInvo's free plan includes five invoices per month with no hidden charges. FreeAgent and Xero only offer time-limited trials.
Do I need MTD-compatible software?
If you're VAT-registered, yes — it's a legal requirement. Even if not, HMRC is expanding MTD to income tax for self-employed individuals earning over £50,000 from April 2026. Choosing MTD-ready software now saves switching later.
Can I switch invoicing software easily?
Most platforms allow CSV/PDF export. PrimeInvo offers a free migration tool that imports client and invoice data from other platforms in minutes.
Try PrimeInvo Free — No Credit Card Required
Create up to 5 invoices per month, completely free. MTD-ready, HMRC-compliant, and built for UK freelancers.
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