CIS Tax Calculator
CIS is deducted from labour, not the whole invoice. Enter the payment, take out what the subcontractor paid for, and see the deduction and the net figure from either side.
The payment
Enter the invoice as it stands. CIS is deducted from labour only, so everything the subcontractor paid for comes out first.
Showing what to pay the subcontractor, and what to hand over to HMRC.
Verified with HMRC as registered for CIS. HMRC confirms the rate when the subcontractor is verified.
What to deduct and pay
Correct as at August 2026.
Give the subcontractor a payment and deduction statement within 14 days of the end of the tax month, and report the payment on your monthly return by the 19th.
Rates and the exclusion list checked on gov.uk in August 2026: 20% registered, 30% unregistered, 0% with gross payment status. This is an aid to help you prepare, not tax advice. Check with your accountant or HMRC.
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Leave an honest Google reviewReviews are optional. Please only review based on your genuine experience.CIS comes off labour, not the whole invoice
The percentage applies to what is left after everything the subcontractor paid for is stripped out. Get that wrong and you either short-pay a subcontractor or under-deduct and owe HMRC.
20%, 30% or nothing
HMRC tells the contractor which rate to use when the subcontractor is verified. Nobody on site chooses it.
The paperwork the deduction creates
A deduction is not the end of it. Two deadlines follow, and both are easy to miss.
Keep the deduction with the job
This calculator works out the deduction. FieldHive keeps it on the job record, so what you invoice and what gets deducted stay linked.
Price the job and produce the paperwork
Use these alongside your CIS deductions.
Subcontractor Cost & Charge-Out Calculator
What a subcontractor really costs you, and what to charge on.
Price a subcontractor →CIS Payment & Deduction Statement Generator
Produce the statement you owe within 14 days.
Build a statement →CIS & VAT Invoice Generator
Invoice with the deduction and reverse charge on one document.
Build an invoice →CIS tax calculator questions
Quick answers to the questions people ask most.
Get CIS right before the money moves
Work out the deduction, raise the invoice and issue the statement without rebuilding the figures each time.
