Xero vs FreeAgent vs Sage for UK SMEs.

For most UK micro-businesses FreeAgent is the cheapest complete answer, particularly for NatWest, Royal Bank of Scotland, Ulster Bank and Mettle customers who get it at no extra cost. Xero suits businesses that need multi-currency, inventory or a large app ecosystem. Sage suits stock-heavy businesses and those already on Sage 50.

Xero vs FreeAgent vs Sage: how do they compare?

List prices move more often than feature sets, so check the current figures on the vendor sites rather than on any comparison article, this one included: FreeAgent and Xero publish theirs, and Sage publishes tiers for both Sage Accounting and Sage 50. What is stable is the shape of each offer, which is what the table above compares.

Which is best for a UK sole trader or contractor?

FreeAgent, in most cases, and the reason is not the bookkeeping. It is that FreeAgent files. A sole trader can prepare and submit the Self-Assessment return from inside the product, and a straightforward single-director limited company can file annual accounts and the CT600 the same way. Neither Xero nor Sage does that natively in the UK, so the equivalent workflow needs an accountant's tax software on top.

The second reason is commercial. FreeAgent is owned by NatWest Group, and customers of NatWest, Royal Bank of Scotland, Ulster Bank in Northern Ireland and Mettle get it included with an eligible business account provided the account stays in use. For a contractor invoicing a handful of clients a month, that removes the software line from the cost of running the company entirely.

Where FreeAgent stops working is complexity. It has no serious stock function, limited multi-currency handling, and a small app ecosystem. Contractors reading this alongside the IR35 guide for contractors should note that none of the three products makes a status determination for you, whatever the marketing implies. Our FreeAgent accountants page covers how we run it, and accountants for freelancers and contractors covers the surrounding advice.

When is Xero the right answer?

When the business has outgrown a single currency, a single sales channel or a single system. Xero's advantage is not the ledger, which is comparable to the other two. It is the ecosystem: inventory, payments, expenses, forecasting, e-commerce connectors and payroll all plug in, and most UK accountants can work in it without a learning curve.

• Multi-currency. Available on the higher tiers, with revaluation handled in the product rather than in a spreadsheet. Our multi-currency accounting guide covers what still needs manual attention.
• E-commerce. Channel connectors and the ability to carry a sensible chart of accounts across marketplaces, which is the subject of our Shopify and Amazon chart of accounts post.
• Team access. Unlimited users on every plan, which matters once more than one person raises invoices or approves bills.
• Reporting. Tracking categories give departmental or project reporting without a second system, which is usually enough until a business needs proper monthly management accounts.

Xero is the wrong answer for a one-person company with ten invoices a month, where you are paying for an ecosystem you will not use. It is also the wrong answer for a business whose stock control is the core of the operation, because the built-in inventory is deliberately basic. Our Xero Certified Advisor accountants page sets out how we run it, and Xero versus QuickBooks covers the other comparison people usually run at the same time.

When does Sage still win?

Two situations, and both are real rather than nostalgic. The first is stock. Sage 50 handles multi-location stock, bills of materials and batch costing at a depth neither of the other two matches without third-party software, and for a wholesaler or a small manufacturer that is the whole decision. The second is an existing Sage 50 installation with years of history, integrations and staff who know it. Migration has a cost, and it is not always worth paying.

Sage Accounting, the cloud product, is a different proposition from Sage 50 and should not be evaluated as though they are the same thing. It competes directly with Xero on price and covers the standard needs of a small UK company, with tiering that includes user counts as well as features. It is a reasonable choice, and it rarely wins on merit against Xero unless price at the entry tier is decisive.

Our honest position, which a reseller would not print: we turn down Sage 50 migrations where the client's only reason is that cloud sounds better. Moving a stock-heavy business off Sage 50 onto a platform with weaker inventory creates a problem that costs more than the licence saved. Our Sage 50 and Sage Business Cloud accountants page covers what we will and will not migrate.

What does Making Tax Digital mean for the choice?

All three products appear on HMRC's list of software compatible with Making Tax Digital for VAT, so MTD VAT alone does not separate them. The separation comes with Making Tax Digital for Income Tax, which begins phasing in from April 2026 for self-employed people and landlords with qualifying income above 50,000 pounds and requires quarterly digital updates rather than one annual return.

Check the current position against HMRC's software for sending Income Tax updates list before committing, because that list changes as products complete testing. The practical point for a sole trader is that MTD for Income Tax turns bookkeeping from an annual chore into a quarterly obligation, which raises the value of a product that files for you. Our MTD for Income Tax guide covers the timetable, and Making Tax Digital for VAT covers the older regime.

Which one handles CIS and the construction reverse charge?

This is the sector question that most often overrides everything above. A contractor inside the Construction Industry Scheme needs the software to verify subcontractors, calculate deductions on the labour element only, produce payment and deduction statements, and file the monthly CIS return. Xero offers CIS functionality for UK subscriptions, Sage supports it in both Sage 50 and the cloud product, and FreeAgent does not support CIS at all.

The VAT domestic reverse charge for building and construction services adds a second requirement: invoices that carry the correct reverse charge wording and a VAT return that reports the customer-side entries properly. Both Xero and Sage handle the tax rates for it. If you are in construction, that pair of requirements usually settles the choice before you reach price, and it is worth reading the CIS scheme explained guide and our construction accountants page before you commit to a platform you will have to leave.

The general lesson holds beyond construction. Sector mechanics beat feature lists. A dental practice, a law firm with client money under the SRA Accounts Rules, and a landlord with several SPVs each have a requirement that quietly rules one of these products out, and none of those requirements appears on a comparison grid.

How do you actually choose?

1. Start with the filings you need. If the return matters more than the reporting, FreeAgent's built-in filing is worth more than any feature comparison.
2. Count the currencies. More than one, and FreeAgent is out.
3. Count the stock lines. Serious inventory points to Sage, or to Xero plus a dedicated stock app.
4. Count the people who need access. User-limited tiers cost more than they look once a second person needs to raise invoices.
5. Check your bank. An eligible NatWest Group or Mettle account changes the FreeAgent maths completely.
6. Ask who will maintain it. The best product is the one your accountant can work in without billing you to learn it.

Migration between any two of these is a defined project, not a weekend: a cut-over date, opening balances agreed to the last filed accounts, VAT continuity so no period is filed twice or missed, and a parallel month before the old system is switched off. We do this as part of cloud bookkeeping, and businesses with a backlog should start with catch-up bookkeeping instead, because migrating an unreconciled ledger just moves the problem. The wider UK compliance calendar is on our accountants for UK SMEs page, and unfamiliar terms are defined in our accounting and tax glossary.