These two meet more often than any other pair on UK shortlists and the gap between them is smaller than either marketing department admits. Both are HMRC recognised for Making Tax Digital, both reconcile bank feeds well, both are priced for small businesses. The differences that actually decide the purchase sit one level down.
Sage Accounting wins the bundle. Every plan now includes payroll and Sage Copilot, so a business with a handful of staff gets its books, its pay run and its VAT in one subscription from £20 a month, and the current 90% off for 6 months offer makes trying it nearly free. CIS handling on the Standard plan is properly built in, which matters to the enormous number of UK trades businesses this product courts. Xero wins the experience and the ecosystem. Unlimited users on every plan removes the seat counting conversation entirely, the reconciliation flow remains the most pleasant in the category, and the app marketplace of over a thousand integrations means whatever software your business already runs probably connects. Its payroll, however, is a paid add on, and that difference compounds monthly.
Choose Sage Accounting if you employ people and want payroll, VAT and CIS handled inside one bill, or if your accountant is one of the thousands of UK practices built on Sage. Choose Xero if several people need to live in the books at once, if your business leans on connected apps, or if day to day usability is the thing your team will actually notice. Price the pair honestly with payroll included and Sage usually lands cheaper, which is the tiebreak most small businesses should respect.