Tool Tax Refund Calculator

A tool tax refund calculator multiplies what you spent on work tools by the Income Tax rate you pay. At the 20% basic rate, the tax back on tools you paid for yourself comes to £200 for every £1,000 spent. The refund is capped at the Income Tax you paid that year.

If you’ve seen tool refunds worked out at 18%, that figure answers a different question. It’s a yearly writing down rate for cases where the full cost can’t be relieved at once. For tools you buy to do your job, HMRC’s guidance says you may be able to claim relief on the full cost.

On £1,000 of tools at basic rate, that’s the difference between £36 in the first year worked out the 18% way and £200 on the full cost.

The tool tax refund calculator gives a one-year estimate from two inputs: what you spent and your tax rate.

Your real figure can differ if your employer paid part of the cost, you don’t have receipts, you’re a Scottish taxpayer, you owned the tools before using them for work, or you paid little tax that year.

How to use the tool tax refund calculator

The calculator works one tax year at a time. A tax year runs from 6 April to 5 April, so gather what you paid for tools inside those dates before you start.

To get your estimate:

1. Add up what you paid for work tools in that tax year, including VAT unless you reclaimed it as a VAT registered business.
2. Take off anything your employer paid towards those tools, because relief only covers the part you paid yourself.
3. Enter the total in the calculator.
4. Choose the highest rate of Income Tax you pay.
5. Read the estimate, which is your total multiplied by that rate.

Run it once for each year you want to claim. Claims can go back four tax years before the current one, and your rate and the tax you paid can change from one year to the next.

If you bought tools on a credit agreement, the page on claiming for tools bought on finance covers which year they belong in.

Your tax rate decides the refund

Tax relief doesn’t hand back what you spent. It takes that amount off the income you’re taxed on, so the refund is the tax you’d otherwise have paid on that slice of income.

Pick the highest rate you pay, because the deduction comes off the top slice of your income first.

For taxpayers in England, Wales and Northern Ireland, here’s what the basic, higher and additional rates give back:

Scottish taxpayers have more bands and different rates. Check your band in the table of current and past Income Tax rates before you pick a rate in the calculator.

Every figure in the table assumes two things: all the relief falls inside one band, and you paid at least that much tax in the year. The section on what the calculator can’t see shows what happens when either one isn’t true.

Why the tool tax refund calculator doesn’t use 18%

Bigger kit you have to buy for your job can qualify for the annual investment allowance, which relieves the whole cost in the year you buy it. That’s set out in GOV.UK’s guidance on buying equipment for work, which calls it substantial equipment.

Two conditions apply to that equipment. Your job has to require it, and any private use has to be insignificant.

Small items that will last less than two years go down a different route: you claim either the actual amount, with receipts or other proof, or a flat rate. Both routes give relief on what you spent at your tax rate, which is why the calculator uses the same sum for each.

The 18% figure comes from writing down allowances. These let you deduct a yearly percentage of an item’s value, and they’re used when the full cost can’t be claimed in one go. The main rate fell from 18% to 14% for Income Tax from 6 April 2026.

Writing down allowances still matter for a tool you owned before you started using it for work, or one you were given. Those can’t use the annual investment allowance, so they go through writing down allowances instead, and a small pools allowance can apply when the balance is £1,000 or less.

The guide to capital allowances on tools explains how that works.

Why the tool tax rebate calculator uses actual cost

Within the rules for uniforms, work clothing and tools, you claim either what you actually spent or an agreed flat rate for your job. The flat rate needs no receipts. The actual amount needs receipts or other proof that you paid.

Flat rates are fixed yearly amounts, and HMRC’s flat rate expenses list sets them by industry and job:

• Motor mechanics in a garage repair shop can claim £120 a year.
• Joiners and carpenters in the building industry can claim £140 a year.
• Anyone whose job isn’t on the list can claim £60 a year.

At basic rate, £120 knocks £24 off your tax for the year and £140 knocks off £28. At higher rate those become £48 and £56.

Both routes use the same tax rate, so the bigger starting figure wins. The flat rate is meant to cover work clothing as well as tools, so compare it with what you spent on both. When that total is more than your flat rate amount, the actual cost gives the larger refund, and that’s the figure the tool tax rebate calculator works from. Spend less and the flat rate comes out ahead, with no receipts needed.

Tax back on tools calculator examples for three trades

A joiner on the basic rate spends £800 on tools in a tax year, and the employer pays nothing towards them. The calculator gives £160, which is £800 at 20%.

The joiner’s flat rate of £140 would be worth £28 that year. Claiming the actual cost wins by a distance.

A mechanic taxed at 40% on well over £6,000 of income spends £6,000 on tools in one year. The calculator gives £2,400.

A claim that size changes the route. When your job expenses for a year come to more than £2,500, you’ll need a Self Assessment tax return to claim. Anyone who already fills in a return claims on it, whatever the amount.

The mechanics tax rebate guide covers the claim from a mechanic’s side.

An electrician on the basic rate, claiming for the first time, runs the calculator for three tax years with £300, £900 and £1,500 of tools. That gives £60, £180 and £300, or £540 across the three years.

Even the smallest year beats a £120 flat rate, which would be worth £24. Running each year separately also means each one can be checked against the tax paid in that year.

What the work tools tax refund calculator can’t see

The calculator multiplies one number by one rate. Two situations break that sum.

Say you work part time, paid £86 of Income Tax in the year and spent £1,000 on tools. The calculator shows £200, but £86 is all that can come back, since that’s all the tax you paid.

Now say only £730 of your income was taxed at 40% and you spent £2,000 on tools. The first £730 of relief comes at 40% (£292) and the remaining £1,270 at 20% (£254), so the refund is £546 rather than £800.

A few more things change the answer or rule a claim out:

• Anything your employer paid towards a tool comes off first, and if they paid you back in full there’s no claim.
• Personal protective equipment can’t be claimed, because your employer should provide it free or pay you back.
• Cars, motorcycles and bicycles can’t be claimed as equipment, though mileage relief may apply instead.
• A current-year claim usually comes through your tax code, while earlier years get a tax code change or a refund.

None of these show up in the calculator’s result. Treat the figure as an estimate to check against them.

Next steps with your tool tax refund calculator

Your tool tax refund calculator result is what you paid for tools, less anything your employer covered, multiplied by your Income Tax rate. Run it once for each tax year you’re claiming, and check each answer against the tax you actually paid that year.

If your flat rate amount is bigger than your spending, the flat rate is the better claim. Job expenses above £2,500 in a year go through Self Assessment, and tools you owned before using them for work go through writing down allowances instead.

Once you know roughly what you’re owed, the tool tax relief guide covers the evidence to keep and each way to make the claim.

Key Takeaways

• A tool tax refund is what you paid for work tools multiplied by your Income Tax rate, so £1,000 of tools is worth up to £200 at basic rate.
• Whatever the calculator shows, the refund for a year stops at the Income Tax you actually paid that year.
• An 18% figure is a yearly writing down rate, now 14%, not the refund, and it only applies where the full cost can’t be relieved at once.
• Claiming the actual cost beats the flat rate whenever what you spend on work tools and clothing in a year is more than your job’s flat rate amount.
• When your job expenses for a year are more than £2,500, or you already file a tax return, the claim goes through Self Assessment.