Comprehensive Guide to Stamp Duty Land Tax (SDLT) in England and Northern Ireland (2026-27)

Stamp Duty Land Tax (SDLT) is a tax you pay when you buy property or land in England or Northern Ireland. The amount you pay depends on the purchase price, whether you're a first-time buyer, and whether you already own other property. As of April 2025, the standard residential rates start at 0% for properties up to £125,000, rising in bands to 12% on amounts above £1.5 million. First-time buyers get relief up to £300,000 on homes costing £500,000 or less. If you're buying an additional property (like a second home or buy-to-let), you'll pay an extra 5% surcharge on top of the standard rates. You must file an SDLT return and pay the tax within 14 days of completion, or face penalties.

What is Stamp Duty Land Tax?

SDLT is a tax on land transactions. When you buy a freehold property, are granted a new or assigned lease, or buy a share in land or property, you may need to pay SDLT. The tax applies only in England and Northern Ireland—Scotland has its own Land and Buildings Transaction Tax (LBTT), and Wales uses Land Transaction Tax (LTT), both with different rates and thresholds.

The amount of SDLT you pay is calculated on a "slice" or "band" system, similar to income tax. You pay different rates on different portions of the purchase price, not a single rate on the whole amount. This means that even expensive properties benefit from 0% tax on the first £125,000.

Standard Residential SDLT Rates (2026-27)

For most people buying a home to live in (and who don't already own another property), the rates from April 2025 are:

| Purchase price portion | SDLT rate | |------------------------|-----------| | Up to £125,000 | 0% | | £125,001 to £250,000 | 2% | | £250,001 to £925,000 | 5% | | £925,001 to £1.5 million | 10% | | Above £1.5 million | 12% |

These rates apply to the portion of the purchase price that falls within each band, not the entire price.

Example: Standard residential purchase at £350,000

Sarah is buying her first home (and doesn't qualify for first-time buyer relief because she previously owned a property). The house costs £350,000. Her SDLT is calculated as:

• £0 to £125,000: 0% = £0
• £125,001 to £250,000: 2% on £125,000 = £2,500
• £250,001 to £350,000: 5% on £100,000 = £5,000

Total SDLT: £7,500

Example: Higher-value purchase at £1.2 million

James buys a house for £1.2 million (his main residence, no other properties owned):

• £0 to £125,000: 0% = £0
• £125,001 to £250,000: 2% on £125,000 = £2,500
• £250,001 to £925,000: 5% on £675,000 = £33,750
• £925,001 to £1.2 million: 10% on £275,000 = £27,500

Total SDLT: £63,750

First-Time Buyer Relief

If you've never owned property anywhere in the world before (either freehold or leasehold), you may qualify for first-time buyer relief. This relief applies when:

• You're buying a residential property to live in as your main home
• The purchase price is £500,000 or less
• You (and anyone else you're buying with) are first-time buyers

Under this relief:

• You pay 0% SDLT on the first £300,000
• You pay 5% SDLT on the portion from £300,001 to £500,000
• If the property costs more than £500,000, you cannot claim first-time buyer relief at all—you pay the standard rates instead

Example: First-time buyer at £400,000

Emma and Tom are buying their first home together for £400,000. They qualify for first-time buyer relief:

• £0 to £300,000: 0% = £0
• £300,001 to £400,000: 5% on £100,000 = £5,000

Total SDLT: £5,000

Without the relief, they would have paid £7,500 using the standard rates—a saving of £2,500.

Example: First-time buyer at £550,000

If Emma and Tom's property cost £550,000 instead, they would get no relief because it exceeds £500,000. They'd pay the standard rates:

• £0 to £125,000: 0% = £0
• £125,001 to £250,000: 2% on £125,000 = £2,500
• £250,001 to £550,000: 5% on £300,000 = £15,000

Total SDLT: £17,500

Additional Property Surcharge (+5%)

If you're buying a second home, a buy-to-let property, or any additional residential property, you must pay an extra 5% surcharge on top of the standard rates for each band. This surcharge was increased from 3% to 5% at the October 2024 Budget and remains at 5% for 2026-27.

The additional property rates are:

| Purchase price portion | SDLT rate (with surcharge) | |------------------------|----------------------------| | Up to £125,000 | 5% | | £125,001 to £250,000 | 7% | | £250,001 to £925,000 | 10% | | £925,001 to £1.5 million | 15% | | Above £1.5 million | 17% |

You count as owning an additional property if, at the end of the day you complete the purchase, you own more than one residential property. There are some exceptions—for example, if you're replacing your main home and you sell your old one within three years, you can claim a refund of the surcharge.

Example: Buy-to-let property at £250,000

David already owns his home and is buying a buy-to-let flat for £250,000:

• £0 to £125,000: 5% = £6,250
• £125,001 to £250,000: 7% on £125,000 = £8,750

Total SDLT: £15,000

Compare this to the standard rate (without surcharge) of £2,500—the additional property surcharge adds £12,500 to his bill.

Non-UK Resident Surcharge (+2%)

If you're not a UK resident for tax purposes when you buy residential property in England or Northern Ireland, you must pay an additional 2% surcharge on top of any other SDLT due. This applies whether it's your first property or an additional one.

The residence test is complex, but broadly you're UK resident if you've been in the UK for at least 183 days in the 12 months before the purchase. If you're buying with others, each buyer's residence status is assessed separately.

Example: Non-resident buying main home at £300,000

Marie, who lives abroad, buys a home in England for £300,000. She's not UK resident, so pays the 2% surcharge:

• £0 to £125,000: 0% + 2% = 2% = £2,500
• £125,001 to £250,000: 2% + 2% = 4% on £125,000 = £5,000
• £250,001 to £300,000: 5% + 2% = 7% on £50,000 = £3,500

Total SDLT: £11,000

A UK resident buying the same property would pay £3,500 (standard rates), so the non-resident surcharge adds £7,500.

If Marie were buying an additional property, she'd pay both the 5% additional property surcharge and the 2% non-resident surcharge—a total of 7% extra on each band.

Non-Residential and Mixed-Use Property

If you're buying commercial property, land, or a property that's mixed-use (part residential, part commercial—like a shop with a flat above), different rates apply. Non-residential SDLT rates for 2026-27 are:

| Purchase price portion | SDLT rate | |------------------------|-----------| | Up to £150,000 | 0% | | £150,001 to £250,000 | 2% | | Above £250,000 | 5% |

These rates are generally more favourable than residential rates, and there's no additional property surcharge. However, HMRC scrutinises mixed-use claims carefully—the property must genuinely be used for both purposes.

How and When to Pay SDLT

You must file an SDLT return and pay the tax within 14 days of completion (the day you legally own the property). Your solicitor or conveyancer usually handles this for you as part of the purchase process.

The return is filed online through HMRC's SDLT system. You'll need details of the property, the purchase price, and information about the buyers. HMRC will issue a certificate (SDLT5) once the return is processed—you'll need this to register your ownership with the Land Registry.

If you miss the 14-day deadline, you'll face:

• Late filing penalties: £100 if up to three months late, rising to £200 or more for longer delays
• Interest charges: on any unpaid tax, calculated daily from the deadline

Even if no SDLT is due (for example, on a £100,000 purchase), you still need to file a return if the transaction is "notifiable"—which includes most property purchases.

Reliefs and Exemptions

Beyond first-time buyer relief, several other reliefs may reduce or eliminate your SDLT bill:

Multiple dwellings relief: If you're buying more than one dwelling in a single transaction (like a block of flats), you may be able to calculate SDLT based on the average price per dwelling, which can reduce the total tax.

Transfers due to divorce or separation: No SDLT is due when property is transferred between spouses or civil partners as part of a divorce settlement.

Gifts and inheritances: If you inherit property or receive it as a gift with no money changing hands, there's usually no SDLT (though inheritance tax may apply separately).

Charities: Registered charities buying property for charitable purposes pay no SDLT.

Shared ownership: If you're buying through a shared ownership scheme, you can choose to pay SDLT on the share you're buying initially, or make a "market value election" to pay SDLT on the full market value upfront and avoid further SDLT when you buy additional shares ("staircasing").

Common Mistakes

Assuming SDLT is a flat rate on the whole price: Many buyers think that if a property costs £300,000 and the rate is 5%, they'll pay £15,000. In fact, the banded system means they pay much less—only the portion above £250,000 is taxed at 5%.

Missing the 14-day deadline: Life gets busy after completion, but missing the deadline costs you penalties and interest. Make sure your solicitor is handling this, or set a reminder if you're doing it yourself.

Not claiming first-time buyer relief: If you qualify, make sure your solicitor knows—it's not automatic. You need to declare it on the SDLT return.

Forgetting about the additional property surcharge: If you own any other residential property anywhere in the world (even a small share), you'll likely pay the 5% surcharge. Some buyers are caught out when they've forgotten about a property they inherited or own abroad.

Confusing England/NI rules with Scotland/Wales: SDLT only applies in England and Northern Ireland. If you're buying in Scotland or Wales, completely different taxes and rates apply—don't use an SDLT calculator for those purchases.

Not planning for the tax: SDLT can be a significant sum—£15,000 on a £350,000 additional property, for example. Make sure you budget for it alongside your deposit and other purchase costs.

Incorrectly claiming mixed-use relief: Calling a property "mixed-use" to access lower rates when it's really just residential can lead to HMRC investigations and penalties. The commercial use must be genuine and substantial.

Scotland and Wales: Different Systems

It's worth repeating: SDLT does not apply in Scotland or Wales.

• Scotland uses Land and Buildings Transaction Tax (LBTT), with different bands and rates. The starting threshold is lower (£145,000 for residential in 2026-27), and rates rise more steeply.

• Wales uses Land Transaction Tax (LTT), again with its own bands and rates. The starting threshold is £225,000 for residential property.

If you're buying in those nations, you need to research their specific systems—the figures in this guide won't apply.

What to Do Next

If you're buying a property soon: Make sure your solicitor or conveyancer knows your circumstances—whether you're a first-time buyer, whether you own other property, and your residence status. They'll calculate the SDLT and file the return for you. Budget for the tax as part of your purchase costs.

If you have specific questions about your situation: Use the AI Tax chat at myaitax.info to get tailored guidance. For example, if you're unsure whether you count as owning an additional property, or whether a property qualifies as mixed-use, the AI can help you work through the rules.

If you need end-to-end support: AI Accountant can handle your entire tax situation, including SDLT planning, filing returns if needed, and ensuring you claim all available reliefs. This is especially valuable for complex purchases—multiple properties, non-resident buyers, or mixed-use claims.

For official information: HMRC's guidance on SDLT is found in the Stamp Duty Land Tax Manual (SDLTM), and the legislation is primarily in the Finance Act 2003. HMRC also provides online calculators, though these can't account for every scenario.

Understanding SDLT before you buy helps you budget accurately and avoid nasty surprises. The banded system means that even small changes in purchase price can affect your tax bill, and the various surcharges can add tens of thousands of pounds if you're not prepared. With the right information and support, you can navigate SDLT confidently and make sure you're paying the right amount—no more, no less.