Is stamp Duty
tax deductible?

No. Stamp Duty Land Tax paid on buying a property, whether business premises or a buy-to-let, is part of the capital cost of acquiring it, not a running expense, so it cannot be deducted from trading or rental income (GOV.UK). It usually counts towards the property's cost for Capital Gains Tax when you sell (SDLT).

Stamp Duty is often one of the largest single payments a landlord or business makes, which is why so many people ask whether it is deductible. It is not an expense against income. It is part of what the property cost you, and it comes back into the picture when you sell.

Is stamp Duty tax deductible?

The HMRC rule

The cost of buying property, and improvements or enhancements to it, are capital. They are not deducted from rental or trading income, though many count towards the cost for Capital Gains Tax. The rule comes from Work out your rental income when you let property, Stamp Duty Land Tax.

GOV.UK's landlord guidance says that enhancements or improvements, and the purchase of the property, are capital expenditure that cannot be deducted from rental income (landlords). For traders, the SA103F notes say the costs of buying business premises are disallowable (SA103F notes), and legal costs of buying property are not allowable (legal and financial costs). Stamp Duty Land Tax is part of the acquisition cost of the property (SDLT).

When you can claim it

• Include Stamp Duty in the property’s base cost for Capital Gains Tax.
• Include it in the cost of a business property for working out a gain on sale.
• Recover it where you overpaid, for example a higher rates refund after selling a previous home within the time limit.
• Deduct legal fees for short lets and lease renewals under 50 years, which are running costs for landlords.

When you cannot

• Deduct Stamp Duty from rental income.
• Deduct Stamp Duty from trading profit when buying premises.
• Claim capital allowances on Stamp Duty.
• Deduct Stamp Duty on your own home.

What to claim instead

The relief for Stamp Duty comes when you dispose of the property: it is added to the cost you deduct from the sale proceeds when working out a capital gain. Keep the completion statement and the SDLT return, because you may need them decades later.

How to decide if you can claim it

1. Was it for the business? A cost is only allowable if you incur it wholly and exclusively for the business. If it also serves a personal purpose that cannot be separated, such as clothing that keeps you warm or a meal that keeps you going, HMRC disallows it.
2. Is part of it personal? Where a cost has a business part you can identify, such as the business calls on a phone bill or the business miles in a car, you claim that part and leave the rest out, on a reasonable basis you can explain.
3. Is it a running cost or something you keep? It is something you buy to keep. On traditional accounting that means capital allowances, where the item qualifies, rather than an expense. On the cash basis most equipment is an ordinary expense, but cars, land and buildings never are.
4. Is there a specific rule? For stamp Duty, the deciding rule is buying and improving property: the cost of buying property, and improvements or enhancements to it, are capital. They are not deducted from rental or trading income, though many count towards the cost for Capital Gains Tax.

Worked example: a buy-to-let purchase

A landlord who already owns her home buys a £250,000 flat to let in England, and pays £15,000 of Stamp Duty Land Tax at the higher rates for additional properties, plus legal fees on the purchase. Neither reduces her rental profit. Ten years later she sells for £320,000; the Stamp Duty and purchase fees are added to her £250,000 cost, reducing the taxable gain.

Higher rates for additional properties

Buying an additional residential property, such as a buy-to-let or second home, usually attracts higher rates of Stamp Duty Land Tax. The extra charge is still part of the purchase cost, with the same treatment: not deductible from income, part of the base cost for Capital Gains Tax. If you sell your previous main home within the time allowed, you may be able to reclaim the higher-rate element.

Business premises

For a trader buying premises, Stamp Duty and the legal costs of the purchase are part of the capital cost of the building. They do not go through capital allowances, which are for plant and machinery. The premises' cost, including Stamp Duty, is used to work out any gain when you sell.

Scotland and Wales

Scotland has Land and Buildings Transaction Tax and Wales has Land Transaction Tax instead of Stamp Duty Land Tax. The treatment for Income Tax is the same: part of the acquisition cost, not an expense against income.

Stamp Duty on shares

Stamp Duty on buying shares is also a cost of acquisition, part of the base cost for Capital Gains Tax. It is never a trading or rental expense, unless you are a share dealer whose trade is buying and selling shares, which is uncommon for sole traders.

Our stamp duty calculators

If you are buying, the stamp duty calculator works out the tax on a purchase, including the higher rates for additional properties. It does not change the answer on this page: whatever you pay is a capital cost.

If you are a landlord

For a landlord, Stamp Duty on buying a let property is capital and cannot be deducted from rental income. Only legal fees for lets of a year or less, or for renewing a lease of less than 50 years, are allowable running costs (GOV.UK).

Where it goes on your return and in MTD

Because it is not allowable, a sole trader leaves it out of expenses altogether. If it went through your business account, record it as drawings or a non-business payment, and if your accounts include it, add the same amount back in the disallowable column of the full self-employment pages.

A landlord cannot deduct it from rental income either, so it stays out of the property expense boxes.

If your turnover was under £90,000, you can use the short self-employment pages (SA103S), which ask for a single figure for total allowable expenses rather than a box-by-box breakdown, and the full pages let you give just a total in box 31 too. The category still matters for your own records and for Making Tax Digital, where each quarterly update uses the same categories unless you choose to send one consolidated figure.

Most sole traders now use the cash basis, the default from the 2024/25 tax year, which counts a cost when you pay it. On traditional accounting you count it when you incur it, and equipment you keep goes through capital allowances rather than expenses.

How much an allowable cost saves

The value of a deduction is the tax it removes from your profit, not the cost itself. At the basic rate a sole trader saves 26p for every pound of allowable expense, at the higher rate 42p, and in the personal allowance taper between £100,000 and £125,140 as much as 62p. Landlords pay no Class 4 on rental profit, so they save 20p or 40p.

Records to keep

Keep mortgage statements showing the interest and capital split, insurance schedules, service charge demands and invoices, and completion statements for any purchase. For a home also used for business, keep the calculation of the business share. Records must be kept for at least five years after the 31 January deadline for the tax year.

From 6 April 2026, sole traders and landlords with qualifying income over £50,000 keep these records digitally and send quarterly updates under Making Tax Digital, falling to £30,000 from April 2027 and £20,000 from April 2028. The MTD requirement checker shows when it applies to you.

Common mistakes

• Deducting Stamp Duty from rental income.
• Losing the completion statement needed for Capital Gains Tax years later.
• Treating purchase legal fees as running costs.

Related expenses

This item sits in the rent, rates, power and insurance costs category, alongside business rates, council Tax, garden office, home and landlord insurance, mortgage interest, rent, service charges and solar panels. The A to Z of expenses answers the same question for every other cost.

TapTax sorts each cost into the right category as you record it, applies the business share where you set one, and keeps the receipts with the figures, ready for your quarterly updates and final return.