How We Test Accounting Software

By Rachel Okafor, AAT-qualified bookkeeper · Updated 16 July 2026

Most software reviews are written from the pricing page. Ours are written from inside the product, with a year of realistic UK books loaded into every package we score. This page explains exactly what we do, so you can judge whether to trust us.

The test set: two real-shaped businesses

Every package gets the same two sets of books, built from anonymised real trading data:

"Brightway Joinery Ltd": a VAT-registered limited company. Twelve months of trading, roughly 1,400 bank transactions across a current account and a credit card, 60 sales invoices, 90 supplier bills, two employees on payroll, a van on hire purchase, and one deliberately messy quarter with a duplicated supplier invoice and a mis-keyed VAT amount hidden in it.
"KO Consulting": a sole trader consultancy under the VAT threshold but over £50,000 of income, so squarely inside MTD for Income Tax. Mixed hourly and fixed-fee invoicing, home office costs, mileage, and payments on account to juggle.

The books contain planted errors on purpose. Part of what separates good software from adequate software is whether it helps you find the £847.50 that should have been £874.50.

What we score (and how it is weighted)

Daily bookkeeping, 25%: time to reconcile a standard month, quality of matching suggestions, invoice workflow, error-finding tools.
UK compliance, 25%: MTD VAT filing on standard, cash and Flat Rate schemes; MTD Income Tax quarterly updates; CIS where relevant. Since the April 2026 ITSA start, this pillar carries more weight than it did in earlier editions.
Value, 20%: standard-rate pricing (never intro discounts), what each tier locks away, user limits, add-on costs stacked into a realistic total.
Support, 15%: two real support cases per product, timed: one simple, one awkward VAT scheme question. Channels available, UK hours, quality of the answer.
Ecosystem and growth, 15%: bank feed coverage including app-based banks, payroll options, integrations, whether the product can carry a business from sole trader to a ten-person company.

Scores map to the /5 ratings on our review pages, rounded to the nearest half. A "Best for" badge is a separate judgement about fit, not a reward for the highest total.

How we handle pricing

Every price we publish is the standard monthly rate excluding VAT, with the date we checked it (currently July 2026). We ignore introductory discounts in comparisons because they expire; we mention them so you can take advantage. When a vendor changes pricing between our quarterly checks, we update the page and note it rather than quietly editing history.

Quarterly re-checks

Accounting software changes constantly and MTD policy has moved more than once. Each quarter we re-verify prices, plan limits and HMRC recognition status for every product, and re-run the full books test annually or when a product ships a major change. Every page shows its last update date. If a page looks stale, tell us: hello@best-in-the.co.uk.

Independence and money

Best In The is reader-supported. Some outbound links may become affiliate links, meaning we could earn a commission at no cost to you. Two hard rules keep that honest: rankings and scores are finalised before any commercial conversation happens, and no vendor sees a review before publication or pays to be included. If a conflict ever exists on a page, it will be disclosed on that page. More in our about page.

What we do not do

We do not test with vendor-supplied demo accounts; we build our own books.
We do not score features we have not used.
We do not give tax advice. Our lane is software; your accountant and HMRC own the tax answers.

Start with the results: Best Accounting Software UK (2026).