CIS Tax Refund Calculator
Subcontractors: 20% CIS deductions usually overshoot what you actually owe once expenses are claimed. Estimate your refund in seconds.
Why CIS subcontractors get refunds
Contractors deduct 20% from registered subcontractors’ labour payments (30% if unregistered) and pass it to HMRC. But your real bill is worked out on profit after expenses — tools, van, materials, insurance — so the deductions often add up to more tax than you owe. The difference comes back as a refund after your self-assessment.
We prepare CIS returns for builders and electricians across London — claiming every allowable expense so the refund is as big as the law allows.
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