CIS tax refund calculator for subcontractors

Tax year

2025-262026-27

Where you live

1 · What you earned

Total paid by contractors Before CIS was taken off. Add up the gross on your CIS statements.

Materials you bought and charged for Optional. No CIS is taken off materials, and they count as an expense.

CIS taken off

Work it outI know the total

20% (registered)30% (not registered)

2 · Your expenses for the year

Business miles in your van or car Between sites and to the merchant. Not home to a permanent base.

Tools

Parking, tolls, travel

Phone (work share)

PPE and workwear

Training, CSCS cards

Insurance

Accountant, bank fees

Other work costs

Using actual van costs instead of mileage?

Van running costs, work share Fuel, insurance, repairs, tax. Use this OR mileage for the same van, not both.

3 · Also had a PAYE job or pension? (optional)

Other income before tax From your P60 or P45.

Tax already paid on it

Your estimate

£–

Put in what contractors paid you to see your estimate.

Let us file it for you

S+ Money prepares and files your Self Assessment return, so you get back what you're owed without the paperwork.

Built for CIS subcontractors
We gather your CIS statements and expenses
Filed with HMRC before the deadline

Rates used

Checked on GOV.UK on .

Estimate only, not tax advice. This uses the GOV.UK rates for the year you pick and only the figures you enter. It doesn't see your HMRC record, student loan, Marriage Allowance, pension or Gift Aid relief, savings, dividend or property income, or losses, and it isn't for limited companies. Your real refund or bill is what HMRC works out from your Self Assessment return. Your figures stay in your browser: nothing is sent or saved unless you send the form.

How much CIS tax are you owed back?

Often missed. Did you include these?

Let us file it for you

Rates used