Construction Budget Spreadsheet UK 2026: CIS Deduction, Retention and Reverse Charge VAT

CIS takes 20% of the labour part of every payment (30% if you are not CIS-registered), and since 1 March 2021 the domestic reverse charge sends the 20% VAT on your invoice to HMRC via the contractor, not to you. Budget the cash you will actually be paid.

Your numbers

Your result

Labour part of the price (CIS is charged on this)-
CIS deducted by the contractor-
Retention held back-
Cash paid into your bank by completion-
Contingency-
Total job budget incl. contingency-
Cash left on completion-
Profit after CIS credit and retention release-
VAT you will NOT receive (reverse charge)-
Cash short vs a price + VAT budget-

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Free construction budget templates count your costs against price + VAT. Under CIS and the domestic reverse charge (since 1 March 2021) the contractor keeps the CIS and pays your VAT to HMRC, so check the cash line before you sign.

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