Every small business needs to track money in and out — HMRC requires it, and you’ll go mad without it. But accounting software can cost £20–£40 a month, which stings when you’re starting out. The good news: the best free accounting software for small business is genuinely good enough for most sole traders and micro-businesses. Here’s what’s actually free, what’s “free*”, and when to pay.
What you actually need (it’s less than you think)
As a UK sole trader, HMRC requires records of income, expenses, and supporting documents — kept for 5 years. That’s it. You don’t need double-entry bookkeeping, balance sheets, or anything fancy. You need: to log every sale, log every expense with a receipt, know your profit, and produce the numbers for a Self Assessment return. Any tool — including a spreadsheet — that does this reliably qualifies. Complexity beyond that is optional until you incorporate or register for VAT.
Free accounting software: the genuinely free options
Wave (free). The best truly-free accounting software for small businesses. Invoicing, expense tracking, receipt scanning, basic reports — all free, no trial expiry. It makes money from optional payment processing, which you can ignore. Downsides: it’s Canadian/American — no built-in UK VAT handling or Making Tax Digital compliance, and UK bank feeds can be flaky. For a sole trader under the VAT threshold who just needs clean records and invoices, it’s excellent.
QuickFile (free for small businesses). UK-based and the best free option for businesses that might need VAT later — it handles UK VAT and Making Tax Digital. Free for accounts with modest usage (plenty for most micro-businesses). Slightly less polished than Wave, but properly UK-compliant, which matters.
Spreadsheets (free forever). Don’t dismiss the humble spreadsheet. HMRC accepts spreadsheet records. A well-organised Google Sheet with tabs for income, expenses and a profit summary does everything a sole trader legally needs. It’s free, flexible, and you understand exactly what’s happening. The downside: no automation, no invoice templates, and it’s easy to let slip. But “a spreadsheet I actually update” beats “fancy software I never open”.
The “free*” options (free with strings)
FreeAgent (free via bank). FreeAgent is superb UK software (£19–£38/month normally) — but free if you bank with NatWest, RBS, Ulster Bank, or Mettle. If you’re with one of those banks, this is the best deal in UK small-business accounting: full VAT, payroll, Self Assessment filing, the lot, for £0. Check your bank’s current offer — these partnerships change.
Xero / QuickBooks / Sage (free trials). 30-day trials, not free products. Useful for evaluation, not for running your business. Their entry tiers (£14–£30/month) are worth it once you’re established, but don’t pay on day one.
Zoho Books (free tier). Free for businesses under $50k revenue — decent features, UK VAT support. Less well-known in the UK, but a solid option.
Invoicing apps (if that’s all you need)
If your “accounting” is really just sending invoices and tracking who’s paid: Invoice2go, Zoho Invoice (free), or even PayPal’s invoicing. But honestly, Wave does this plus expense tracking for free — start there rather than a single-purpose app you’ll outgrow.
Making Tax Digital: the thing to watch
HMRC’s Making Tax Digital (MTD) programme requires digital record-keeping and digital tax submissions. MTD for VAT is already mandatory for VAT-registered businesses; MTD for Income Tax (affecting sole traders and landlords over £50k income, later £30k) is rolling out. The implication: your records need to be in compatible software eventually, and you may need to submit quarterly updates. QuickFile and FreeAgent handle MTD; Wave doesn’t (US-focused); spreadsheets alone won’t comply when MTD for Income Tax reaches you. If your income is approaching the thresholds, choose MTD-compatible software now rather than migrating later. Check current requirements on gov.uk — the timeline has shifted before.
When to start paying
Upgrade from free when: you register for VAT (need proper VAT handling), you incorporate (limited company accounts need more), you hire employees (payroll), or your time spent wrestling free tools exceeds their cost (an hour a month fighting software = £15–£30 of your time). At that point, FreeAgent (via bank), Xero or QuickBooks at £15–£30/month are all fine — pick the one your accountant prefers, because a happy accountant saves you more than software choice ever will.
The system that actually works
Software doesn’t do accounting — habits do. Whatever you choose: log income and expenses weekly (15 minutes, standing appointment), photograph receipts immediately (thermal paper fades within months), reconcile against your bank monthly, and review profit quarterly. Pair this with our invoice writing guide and the freelancer tax guide for the full money-management picture. The businesses that survive aren’t the ones with the best software — they’re the ones that know their numbers.
The bottom line
Switching software later: don’t fear it
Beginners often agonise over choosing the “right” software, fearing they’ll be trapped. Don’t — switching accounting software is straightforward: export your transactions (every tool offers CSV export), import into the new one, and carry on. The pain of switching is a few hours once; the pain of paying £30/month for years for software you chose hastily is far greater. Start with the free option that fits today (Wave for simplicity, QuickFile for UK VAT-readiness), build the weekly logging habit — the habit matters 10× more than the tool — and switch when the business justifies it. Your accountant can also migrate you in under an hour when the time comes. Choose for now, not forever.
Receipt management: the unglamorous essential
The part of accounting everyone neglects: receipts. HMRC can ask for evidence behind your expense claims, and thermal till receipts fade to blank within a year. The fix is trivial: photograph every business receipt the day you get it. Wave, QuickFile and most apps have receipt capture built in — snap, categorise, done. No app? A dedicated phone album (“Receipts 2026”) works fine, backed up to the cloud. The rule: if there’s no receipt, there’s no claim — not because HMRC always checks, but because the one time they do, you’ll be glad you have them. Two minutes a day saves a world of pain.
The best free accounting software for small business: Wave for sole traders who want proper free software, QuickFile for UK VAT/MTD readiness, FreeAgent if your bank offers it free (the best deal going), or a disciplined spreadsheet if you prefer simplicity. Start free, build the weekly habit, and pay for software when the business justifies it — not before.
