How Much Stamp Duty on a Buy-to-Let UK 2026 (5% Surcharge + Bands)

You’ve found a buy-to-let and you need to know how much stamp duty will come out of your cash on completion. Stamp Duty Land Tax (SDLT) on a UK buy-to-let in 2026 is worked out in layers. First the standard residential bands, charged slice by slice up the price ladder. Then a 5% additional-property surcharge on every band once the price is £40,000 or more. Then an extra 2% non-resident surcharge if the buyer counts as non-UK resident for SDLT.

Get the layers right and you can usually plan a purchase to fall the right side of a band. Get them wrong and you hand HMRC several thousand pounds you didn’t need to.

This guide walks through the 2026 bands, the surcharge mechanics, the six purchase scenarios that produce the most common overpayments (or HMRC enquiries), and the working-out for a typical £200k, £350k and £500k BTL purchase. For instant numbers on your own purchase, use the Stamp Duty BTL Calculator.

The 2026 SDLT bands for residential property

Standard residential SDLT in England and Northern Ireland in 2026 is charged in slices, band by band:

The surcharge is a flat +5% across every band, including the £0 – £125,000 band that would otherwise be tax-free. Once the price is £40,000 or more, the higher rates apply to the whole price from £0. There is no surcharge-free starter band.

If the buyer is a non-UK resident (broadly, not in the UK for at least 183 days in any continuous 365-day period between 364 days before and 365 days after completion), an additional 2% non-resident surcharge applies on top of every band, including the surcharge bands. So a non-resident buying a BTL pays standard rate + 5% additional property + 2% non-resident = +7% over the standard rate in every band.

The £40,000 threshold matters: the higher rates apply only where the total purchase price is £40,000 or more, so below £40,000 they don't apply at all. This catches a small number of garage / parking-space and ground-rent purchases that look like residential property to HMRC but fall under the threshold.

Stamp duty is paid once, but the figure is wanted again when you sell. From £7.99 a month, LetCompliance keeps the completion statement in the new property’s documents and runs the let that pays it back: the advert and applications, the tenancy agreement and rent by Direct Debit into your own account. Get started

Worked example: £200,000 BTL purchase

A typical first-time BTL purchase: a £200,000 ex-council flat in the Midlands or North.

Standard SDLT (would apply if this were the buyer’s only home):

• £0 – £125,000 at 0% = £0
• £125,001 – £200,000 at 2% = £1,500
• Total standard SDLT = £1,500

Additional-property SDLT (the BTL case):

• £0 – £125,000 at 5% = £6,250
• £125,001 – £200,000 at 7% = £5,250
• Total additional-property SDLT = £11,500

Non-resident additional-property SDLT (foreign buyer):

• Add another 2% across every band = £4,000 extra
• Total = £15,500

So a UK-resident BTL investor pays £11,500 on a £200k purchase. A non-resident pays £15,500. The £10,000 gap between standard SDLT and additional-property SDLT on a £200k flat is the cost of the surcharge, and it has to come from cash on top of the deposit.

Worked example: £350,000 BTL purchase

A typical mid-market BTL purchase: a £350,000 terrace in a regional city.

Standard SDLT:

• £0 – £125,000 at 0% = £0
• £125,001 – £250,000 at 2% = £2,500
• £250,001 – £350,000 at 5% = £5,000
• Total standard SDLT = £7,500

Additional-property SDLT:

• £0 – £125,000 at 5% = £6,250
• £125,001 – £250,000 at 7% = £8,750
• £250,001 – £350,000 at 10% = £10,000
• Total additional-property SDLT = £25,000

Non-resident additional-property SDLT: add 2% across all bands = £7,000 extra. Total = £32,000.

The surcharge on a £350k purchase is £17,500, which is 5% of the headline price. That number alone often shifts a borderline yield calculation from "buy" to "skip".

Worked example: £500,000 BTL purchase

A higher-yield London or commuter-belt BTL.

Standard SDLT:

• £0 – £125,000 at 0% = £0
• £125,001 – £250,000 at 2% = £2,500
• £250,001 – £500,000 at 5% = £12,500
• Total standard SDLT = £15,000

Additional-property SDLT:

• £0 – £125,000 at 5% = £6,250
• £125,001 – £250,000 at 7% = £8,750
• £250,001 – £500,000 at 10% = £25,000
• Total additional-property SDLT = £40,000

The £25,000 surcharge premium on a £500k purchase is the single biggest upfront cost. It is typically larger than the legal, mortgage arrangement and survey fees combined.

The six most common ways landlords overpay (or trigger an HMRC enquiry)

1. Forgetting that the surcharge counts main-residence properties. The additional-property surcharge applies if you (or your spouse / civil partner) own any other residential property worth more than £40,000 anywhere in the world at the moment of completion. Owning a £20k garage in Spain doesn’t trigger it. Owning a £200k holiday flat in Cornwall does, even if you don’t rent it out.

2. Buying through a Limited Company. A SPV BTL purchase always pays the additional-property surcharge (the company is treated as a "non-natural person" for SDLT). There is no first-time buyer relief for company purchases. The 5% surcharge applies to the entire price even on the company’s first ever purchase.

3. Couples mis-structuring the purchase. SDLT treats married couples and civil partners as a single unit for the surcharge test. Buying the BTL in your spouse’s sole name to "use their nil-rate band" does not avoid the surcharge if either of you owns another residential property.

4. Expecting a refund that doesn't apply. The higher-rates refund for selling your previous main home within 36 months only applies where the new purchase replaces your main residence. A buy-to-let isn't your main residence, so selling your old home later won't get the surcharge on a BTL back.

5. Buying mixed-use property. A property that includes any non-residential element (e.g. a shop downstairs, a flat upstairs) is taxed at the non-residential SDLT rates, which top out at 5% rather than 17%. The non-residential treatment also avoids the 5% additional-property surcharge entirely. HMRC scrutinises mixed-use claims aggressively: the non-residential element must be genuine and substantial. A small home office or garden shed does not count.

6. Multiple Dwellings Relief (MDR) on bulk purchases. Buying two or more dwellings in a single transaction (or linked transactions) used to allow MDR, which calculates SDLT on the average price per dwelling. MDR was abolished from 1 June 2024 for purchases on or after that date. Some landlords are still being mis-advised that MDR is available. It is not available for any purchase completing in 2026.

When SDLT is due and how to pay it

SDLT is due within 14 days of completion. Your conveyancing solicitor will normally file the SDLT return and pay the tax on your behalf, then itemise it on the completion statement.

HMRC issues automatic late-filing penalties starting at £100 (1 day late), rising to a percentage of the tax due (up to 100% for serious cases).

The return must be filed even if no SDLT is due. A return is generally needed for any purchase of £40,000 or more. Below £40,000 there's usually no return to file, and the higher rates don't apply.

How SDLT interacts with mortgage arrangements

The SDLT bill comes out of your cash on completion, not the mortgage. A typical 75% LTV BTL mortgage on a £350k purchase covers £262,500 of the price; you fund the £87,500 deposit plus £25,000 SDLT plus ~£3,000 in legal / valuation / survey fees from your own resources. So the cash-out-the-door is roughly £115,500 on a £350k BTL purchase.

Buyers who underestimate the SDLT bill can run out of cash at the last minute. Use the BTL Mortgage Stress Test Calculator alongside the Stamp Duty BTL Calculator before making an offer to size the full cash requirement.

SDLT planning: legal vs not-legal

Two SDLT planning strategies are firmly legal and worth doing:

• If you're replacing your own main home, time the sale of the old one. The 36-month higher-rates refund applies to a replacement main residence, not to a buy-to-let.
• Buy mixed-use property where the commercial element is substantial and genuine (gets you out of the 5% surcharge entirely).

Two SDLT strategies are firmly not legal and routinely fail HMRC enquiries:

• "Sub-sale" structures that route the property through a third party to claim the lower main-residence rate. HMRC has anti-avoidance rules (FA 2003 s.75A) specifically designed to catch these.
• Aggressive granny annexe / mixed-use claims on a residential property with no real commercial element. HMRC issues SDLT enquiry letters at scale on these every year.

Always run a borderline structuring decision past a tax adviser, not your conveyancing solicitor. Conveyancing solicitors are not tax advisers and the cost of a one-hour SDLT consultation is trivial compared to the cost of an HMRC enquiry three years later.

Where to go next

• Get started: once the purchase completes, LetCompliance runs the let. The advert and applications, the tenancy agreement, the rent ledger and profit and loss for the new property, from £7.99 a month.
• Stamp Duty BTL Calculator: instant SDLT for any UK BTL purchase, including the surcharges.
• BTL Mortgage Stress Test Calculator: the lender’s rent cover (ICR) check at stressed rates.
• Rental Yield Calculator: net yield after tax, after the one-off SDLT.
• Buy-to-Let Tax Guide 2026: the ongoing tax (income tax, CGT, Section 24).
• SPV Limited Company Buy-to-Let 2026: Transfer Costs: SDLT when you incorporate.

Sources

• GOV.UK: Stamp Duty Land Tax: rates and bands.
• GOV.UK: Higher rates of SDLT on additional dwellings.
• legislation.gov.uk: Finance Act 2003, Schedule 4ZA (3% → 5% surcharge framework).
• HMRC SDLT manual: SDLTM09000+ (technical guidance).