CIS Deduction Calculator
Calculate CIS deductions for subcontractors. Enter the gross payment and select the CIS rate to see exactly what the contractor deducts and what you receive.
Labour only — do not include materials (CIS is not deducted from materials)
20% = registered subcontractor · 30% = unregistered · 0% = gross payment status
What is CIS?
The Construction Industry Scheme (CIS) requires contractors to deduct money from subcontractor payments and pass it to HMRC. The deduction counts as an advance payment of the subcontractor's Income Tax and National Insurance.
Registered subcontractors have 20% deducted. Unregistered subcontractors have 30% deducted — a strong incentive to register with HMRC. Gross payment status means 0% is deducted (available to subcontractors with a good compliance history).
You reclaim overpaid CIS through your Self Assessment tax return. TradeTally tracks CIS suffered automatically and includes the figure in your SA103F export.
Frequently asked questions
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