Making Tax Digital for Income Tax Self Assessment (MTD ITSA) starts phased rollout in 2026, which has made accounting software a question every self-employed person and small Ltd has to answer in the next 18 months. The good news: the three dominant options, FreeAgent, Xero, and QuickBooks, are all genuinely capable in 2026. The bad news: they're not interchangeable, and picking the wrong one costs serious time later.
We ran two real businesses on each platform across six months: a freelance sole trader (Tester A, ~£60k revenue, ~120 transactions/month) and a four-person Ltd (Tester B, ~£480k revenue, ~600 transactions/month including payroll).
Here's what we found.
The verdict, before the detail
| Your situation | Pick |
|---|---|
| UK sole trader / freelancer / Mettle account holder | FreeAgent (free with Mettle, otherwise £19/mo) |
| Ltd with 1-10 employees, growing | Xero |
| US-headquartered business / heavy US workflow | QuickBooks Online |
| Ltd with 10+ employees or complex stock/inventory | Xero still, supplemented |
If you're a sole trader and don't already have one of these, open a Mettle business account, it's free and includes a full FreeAgent subscription as a benefit forever. That's £228/year of accounting software for £0. We can't think of a better deal in SME software.
Tester A: sole trader (£60k revenue, MTD-bound)
For Tester A, FreeAgent was the clear winner. Here's why.
FreeAgent, best for sole traders, hands down
FreeAgent is built primarily for sole traders, freelancers, and micro-business owners. It is not the most powerful of the three. It is, by some margin, the easiest to actually use as a sole trader.
What's good:
- Self-assessment ready. Push your year-end straight to HMRC self-assessment with the right numbers in the right boxes. None of the other two does this as cleanly for sole traders.
- MTD ITSA compliant out of the box for the 2026 phase.
- Free with Mettle, every Mettle business account holder gets full FreeAgent included, no time limit. RBS group also offers it free with their business banking. If you're at all eligible, you're paying nothing.
- Time tracking built in, useful if you bill hourly.
- VAT handling that's straightforward, including flat-rate scheme support.
- Customer service. Not perfect; better than the alternatives.
What's not good:
- Limited multi-user collaboration. If you have an accountant who needs full access plus an admin doing data entry, FreeAgent's permission model is basic.
- Doesn't scale to multi-currency businesses as gracefully as Xero. If you frequently invoice in USD/EUR, you'll feel it.
- Reporting is functional, not powerful. Custom reports require more work than in Xero.
Best for: sole traders, single-director Ltds, anyone with simple-to-moderate complexity.
Cost: Free with Mettle / RBS Group business banking; £19/month standalone.
Tester B: 4-person Ltd (£480k revenue)
For a multi-person Ltd, the answer changed. Both Xero and FreeAgent worked, but Xero pulled ahead clearly.
Xero, the right answer for growing Ltds
Xero is the most-used cloud accounting platform in the across SMEs in 2026. The dominance is earned: better at multi-user, better at integrations, better at reporting, better at scaling from 1 to 50 employees.
What's good:
- Multi-user permissions are properly designed. Director-level access, accountant-level access, employee-level access (for expenses), each with the right scope.
- Best app system in SME. Receipt-Bank/Hubdoc integration, Stripe, GoCardless, Pleo, Approval Max, Float, almost everything connects.
- Reporting is genuinely good. Custom reports, dashboards, KPI tracking that aren't an afterthought.
- Multi-currency invoicing works cleanly for businesses with international customers or suppliers.
- MTD ITSA and MTD VAT both supported.
- Payroll add-on (£5/employee/mo) is fully integrated for PAYE, with RTI submission and pension auto-enrolment built in.
What's not good:
- Steeper learning curve than FreeAgent. Plan for a real bookkeeper or accountant to set up the chart of accounts properly. DIY setup is possible; it's the wrong way to start.
- The price has climbed in 2025-26 to £39/mo for the Standard plan most Ltds need. Add payroll (£5/employee/mo) and you're at £50-65/month for a 3-4 person business.
- No free Mettle equivalent. Pay full price.
Best for: Ltds with 1-10 employees, businesses with multi-user accounting needs, businesses planning to grow.
Cost: £19-£59/month depending on tier; payroll add-on £5/employee/month.
QuickBooks Online, the dark horse, mostly for the wrong reasons
QuickBooks Online (Intuit) is the third option and our least-recommended of the three for businesses in 2026. It's not bad. The product feels like the US product with a accent stapled on, and that occasionally shows.
What's good:
- MTD VAT and MTD ITSA support is fine.
- The app (QuickBooks Online) is well-maintained.
- Business credit cards and US bank integration is the deepest of the three, relevant only if you have heavy US operations.
- Strong receipt-capture mobile app.
What's not good:
- Paying for what you don't use. QuickBooks's bigger features (heavy inventory, US-style 1099 reporting) aren't useful in a typical SME. You're buying complexity.
- Self-assessment integration is weaker than FreeAgent's.
- Fewer accountants are on QuickBooks, most accountants in 2026 work in either Xero or FreeAgent. If you switch accountants you may need to switch software.
Best for: arms of US-headquartered companies, businesses with heavy US/split workflows.
Cost: £14-£37/month depending on tier; payroll add-on extra.
Switching costs are real
If you're already on one of these and considering switching, the cost isn't zero. Migration of historical data is possible (all three have export tools and Xero/FreeAgent will both import from the others), but you should plan for:
- 4-8 hours of data verification post-import
- A short period of running both systems in parallel
- Updating bank feed authorisations, integrations, and direct debits
- Telling your accountant well in advance
If you're at year-end and considering switching, don't switch mid-year. Switch on 1 April for sole traders, on the start of your Ltd's accounting year, or at the start of a clean VAT quarter. Migration in the middle of a tax period creates more cleanup than it saves.
What works
| Profile | Recommendation |
|---|---|
| UK sole trader, no Mettle account | Open Mettle business account → free FreeAgent. Annual saving vs paying for Xero: £468. |
| UK sole trader, existing high-street business banking | FreeAgent at £19/mo, switch banking to Mettle when convenient. |
| UK Ltd, 1-3 employees, simple operations | FreeAgent if your accountant is on it; Xero if growing or if multi-user matters. |
| UK Ltd, 4-10 employees | Xero. The collaboration features earn the price difference. |
| UK Ltd, 10+ employees | Xero, plus consider Floqast or Sage for consolidated reporting if multi-entity. |
| UK arm of US business | QuickBooks for parent-company alignment. |
This article is general business information, not professional advice. Tax software changes; tax rules change. Speak to a qualified accountant before making major decisions about how your business accounts are kept.
Affiliate disclosure: Morningfold has affiliate partnerships with FreeAgent, Xero, and QuickBooks. Verdicts were reached on testing, see editorial standards.
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