Best Accounting Software for Sole Traders UK (2026)

Quick answer

Most sole traders should use FreeAgent. It’s simple, built for UK freelancers, shows your tax position in real time, and can file your Self Assessment directly to HMRC.

If you want a free option, you can get FreeAgent included with a Mettle or NatWest business account. See our best business bank accounts for sole traders if you want to compare your options first.

If you need something more advanced or plan to grow, Xero is the best alternative.

Best accounting software for sole traders (UK)

🥇 Best overall: FreeAgent

Best for: Most sole traders, freelancers, and contractors who want a simple, all-in-one solution.

• Built specifically for UK sole traders
• Real-time tax estimates (Income Tax + National Insurance)
• Direct Self Assessment filing to HMRC
• Invoice, track expenses, and reconcile bank transactions
• Free if you bank with Mettle, NatWest, or RBS

👉 If you want the simplest setup with the least admin, FreeAgent is the best choice for most people.

💰 Best free option: FreeAgent (via Mettle/NatWest)

If you don’t want to pay for software:

• Open a Mettle business account
• Get FreeAgent included at no cost

This is one of the few setups where you get:

£0/month banking + £0/month accounting software

If you haven’t opened a business account yet, compare your options here: Best Business Bank Accounts for Sole Traders

⚙️ Best for growing businesses: Xero

Best for: Sole traders planning to scale, hire, or use multiple tools.

• Strong reporting and financial insights
• Large ecosystem (1,000+ integrations)
• Widely used by accountants
• Handles more complex setups

👉 Choose Xero if you expect your business to grow or already work with an accountant who uses it.

📊 Alternative option: QuickBooks Sole Trader

Best for: A focused, simple bookkeeping tool with decent automation.

• MTD-ready
• Good mobile app
• Handles invoicing and expenses well
• Often discounted for the first year

👉 QuickBooks Sole Trader is a solid option if you don’t want FreeAgent and don’t need Xero’s complexity.

How to choose (simple version)

If you’re unsure, use this:

• Want free + simple → FreeAgent via Mettle
• Want easiest all-in-one → FreeAgent
• Planning to grow → Xero
• Want a middle-ground tool → QuickBooks

What accounting software actually does

Modern accounting software replaces spreadsheets and manual tracking.

It will:

• connect to your bank account
• automatically import transactions
• categorise income and expenses
• estimate your tax bill
• generate reports
• help you file your tax return

👉 You don’t need to be “good with numbers” — the software does most of the work.

Do you need an accountant?

Not always.

Many sole traders use software like FreeAgent and file their own tax return.

You may still want an accountant if:

• your income is high
• your situation is complex
• you want advice on tax efficiency

👉 See: Do I Need an Accountant as a Sole Trader?

If you’re choosing both your bank account and software at the same time, read this next: Best Business Bank Accounts for Sole Traders

Most sole traders set both up together to keep things simple and avoid redoing their setup later.

Final recommendation

If you want the simplest, lowest-effort setup:

👉 Use FreeAgent (ideally via Mettle for free access)

If you expect your business to grow or want more advanced features:

👉 Use Xero

Either option will handle your bookkeeping properly — the right choice depends on how complex your business is likely to become.

Last updated: March 2026. Features and pricing may change. Always check provider websites for the latest details.