TAX AUDIT // PLUMBING TRADE // ESTIMATE TOOL
How Much Tax Are You Losing?
A 60-second estimate of what you might be leaving unclaimed as a plumber.
ABOUT THIS CALCULATOR
Most self-employed plumbers underclaim rather than overclaim on their tax return, simply because tracking mileage, tools, training and home office costs by hand is tedious and easy to let slide during a busy week.
This calculator gives a rough estimate of what you might be leaving unclaimed each year, based on standard UK allowable expense categories – business mileage at HMRC’s approved rates, tools and PPE, workwear, phone use, training such as Gas Safe or WRAS courses, and the flat-rate home office allowance.
It’s a starting point, not a tax return – the exact figure depends on your income, other allowances and how HMRC treats your specific circumstances, so it’s worth checking with an accountant before you submit a claim.
Do you currently track and claim all your allowable expenses properly, or mostly estimate at tax time?
Be honest – this just decides which path we take you down.
Result
Already Ahead of Most
Good discipline – most sole traders underclaim, not overclaim. Worth running the numbers below anyway, since it’s easy to miss something even when you’re organised.
PlumberLog logs mileage, costs and business expenses automatically against every job, so nothing gets missed at tax time.
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GBP
Estimated Unclaimed Relief
GBP 0
per year, based on what you told us
PlumberLog logs mileage, costs and business expenses automatically against every job, so nothing gets missed at tax time.
Try PlumberLog Free
This is a simplified estimate for illustration only, assuming a basic rate taxpayer, and is not tax advice. Actual entitlement depends on your individual circumstances – check with an accountant or HMRC guidance before submitting a claim.