CIS
CIS tax refund estimator
For subcontractors. Estimate your CIS refund or tax bill for 2025/26 or 2026/27, and see which Self Assessment boxes the figures go in.
Estimate my refundFree UK tax and money calculators
Plain calculators for UK trades, small firms and executors. They run in your browser, link to the GOV.UK rules they use and need no sign up.
Estimates, not tax advice. Not affiliated with HMRC.
CIS
Getting 20% taken off?
Free calculators for UK subcontractors and contractors on the Construction Industry Scheme. Check a deduction, estimate your refund, then grab the free mileage log. No accounts needed.
Estimates, not tax advice.
CIS
CIS deduction calculator
For contractors and subcontractors. Check what should come off an invoice at 20%, 30% or gross: labour only, with materials and VAT left out.
Check a deductionMileage and expenses log Lite
Excel or Google Sheets. Log every site mile and receipt, totals ready for Self Assessment. Free, pay what you like.
Get the free logWant the whole year tracked? Subcontractor tracker £14.99 · Contractor tracker £14.99 · Both plus the Lite: £21.99 (£29.98 bought separately)
LAUNCH25 takes 25% off either tracker until 31 Oct!!
More free calculators
Inheritance Tax, gifts, late invoices and VAT. All calculators
Probate
Probate and Inheritance Tax calculator
For England and Wales. Estimate the Inheritance Tax on an estate, with the residence allowance, gifts and the probate fee.
Open calculator
Late payment
Late payment interest calculator
For businesses chasing a late invoice. Work out the statutory interest at 8% plus base rate, and the £40, £70 or £100 compensation.
Open calculator
Inheritance Tax
Gift Inheritance Tax taper checker
For anyone who has given money away. See how far a gift is through the 7 years, its taper rate, and the day it drops out of Inheritance Tax.
Open calculator
VAT
VAT threshold checker
For sole traders and small firms. Enter 12 months of sales and see your rolling total against £90,000, your headroom and any deadline to register.
Open calculatorFor window cleaners and childminders
Estimates, not financial advice.
Window cleaning
Window cleaning price rise calculator
For window cleaners. See the new price, what a rise adds over a year, and how many customers you could lose and still take the same.
Plan a price rise
Childcare
Stretched funded hours calculator
For childminders and parents in England. Stretch 570 or 1,140 funded hours over your open weeks: hours a week, hours to claim and paid hours.
Stretch the hoursFor growers and Christmas orders
Estimates from your own numbers, not financial advice.
Allotment
Did my allotment pay its way?
For allotment holders. Type in what you picked and what you spent, set your own prices, and see if the plot paid its way this season.
Check my season
Christmas orders
Christmas Collection Slot Planner
For butchers, farm shops and bakers. Work out how many Christmas orders you can hand over in each collection slot, day by day.
Plan my slotsSpreadsheet templates
Paid Excel and Google Sheets templates for CIS, probate, gifts, freelance invoices and the VAT threshold, sold on Gumroad. Each one links its rates to GOV.UK.
See the templates