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Will I get a CIS refund?

Answer three questions about the 2026/27 tax year (06/04/2026 to 05/04/2027). We'll tell you if money back looks likely.

Estimate only, not tax advice. It uses 2026/27 rates for sole traders in England, Wales and Northern Ireland (rates set 18/10/2026 from GOV.UK). It ignores Scottish tax rates, other jobs or income, student loans and other reliefs. HMRC works out the real figure from your Self Assessment return.

Add up your invoices (labour and materials) for the tax year. Leave out VAT.

It's on the monthly statements your contractors give you.

Tools, materials, van costs, fuel or mileage, phone, protective clothing. Leave it empty if you don't know.

Stop adding it up by hand

BillMyWeek makes your weekly invoices with CIS worked out, then adds up the year for your tax return. Try it free.

Want the full breakdown? Use the CIS refund calculator.