Free CIS tax calculators
Free tools for UK CIS subcontractors and contractors. Estimate your refund, check gross payment status eligibility, and work out your take-home pay.
CIS Refunds
CIS Refund Estimator
Estimate your annual CIS tax refund. See how much HMRC owes you after deductions, expenses and your personal allowance.
Open calculator →CIS Self-Assessment Annual Calculator
Calculate your annual Self Assessment tax liability as a CIS subcontractor and see whether you are owed a refund or have tax to pay.
Open calculator →CIS Back Years Tax Refund Calculator
Estimate your CIS tax refund for up to four previous tax years. HMRC allows claims going back four years from the current tax year.
Open calculator →CIS Basics
CIS Take-Home Pay Calculator
See your net pay from a single invoice after CIS deduction, with a full breakdown of the labour base, deduction and annualised figures.
Open calculator →CIS Invoice Splitter
Split a CIS invoice correctly: calculate the labour element, deduction base, CIS withheld, VAT position and net received from the contractor.
Open calculator →CIS vs PAYE Comparison Calculator
See how your take-home pay compares as a CIS subcontractor versus a PAYE employee at the same gross earnings.
Open calculator →CIS Compliance
CIS Deduction Calculator
Work out the CIS deduction, net payment to your subcontractor, and HMRC remittance for any CIS payment.
Open calculator →CIS Gross Payment Status Eligibility Checker
Check whether you qualify for CIS Gross Payment Status and eliminate the 20% deduction from your payments entirely.
Open calculator →Need help interpreting your results?
These calculators provide simplified estimates. For a full review of your CIS position, refund entitlement, or gross payment status application, speak to one of our CIS specialists.