UK Stamp Duty Calculator 2025: Complete SDLT Guide for First-Time Buyers

What Is Stamp Duty Land Tax (SDLT)?

Stamp Duty Land Tax is a tax paid to HMRC when you buy a property or land in England or Northern Ireland. You must pay within 14 days of completion. Scotland uses Land and Buildings Transaction Tax (LBTT); Wales uses Land Transaction Tax (LTT).

SDLT Rates in 2025 (From 1 April 2025)

The temporary SDLT holiday ended 31 March 2025. Standard rates returned from 1 April 2025:

SDLT is charged on each band separately — like income tax. Use our Stamp Duty Calculator to get your exact figure instantly.

First-Time Buyer Relief 2025

If you are buying your first home you may qualify for first-time buyer relief:

Who Qualifies as a First-Time Buyer?

• You must never have owned a residential property before (anywhere in the world)
• All buyers named on the purchase must be first-time buyers
• The property must be your main residence

Additional Property Surcharge

Buying a second home or buy-to-let property? You pay an extra 3% surcharge on all bands:

SDLT Calculation Examples

Example 1: First-Time Buyer, £350,000 Property

• 0% on first £300,000 = £0
• 5% on £50,000 (£300,001–£350,000) = £2,500
• Total SDLT: £2,500 (effective rate 0.71%)

Example 2: Standard Purchase, £450,000 Property

• 0% on first £125,000 = £0
• 2% on £125,000 (£125,001–£250,000) = £2,500
• 5% on £200,000 (£250,001–£450,000) = £10,000
• Total SDLT: £12,500 (effective rate 2.78%)

Example 3: Additional Property, £300,000

• 3% on £125,000 = £3,750
• 5% on £125,000 = £6,250
• 8% on £50,000 = £4,000
• Total SDLT: £14,000 (effective rate 4.67%)

When Do You NOT Pay SDLT?

• Property purchased for £125,000 or less (standard buyer)
• Property purchased for £300,000 or less (first-time buyer)
• Property transferred as a gift with no money changing hands
• Property inherited or transferred in divorce proceedings

How to Pay SDLT

Your solicitor or conveyancer handles the SDLT return and payment at completion. You must pay within 14 days of completion — late payment incurs interest and penalties from HMRC.

Budget Planning: Total Cost of Buying a Home

SDLT is one of several upfront costs. Also budget for: solicitor fees (£1,000–£3,000), survey (£400–£1,500), mortgage arrangement fee (£0–£2,000), and removal costs (£500–£3,000).

Use our Mortgage Calculator to work out monthly repayments, and our Income Tax Calculator to understand take-home pay.

SDLT Rates Table 2025–2026: Residential vs Buy-to-Let vs Second Home

Understanding which rate band applies to your purchase is the single most important step before budgeting for a property transaction. From 1 April 2025, three distinct rate schedules apply depending on whether you are buying a main residence, an additional property, or purchasing through a company. The table below sets out all bands side by side so you can see at a glance how the 3% surcharge stacks onto standard rates, and where the higher company-rate kicks in.

*A 15% flat rate applies to companies acquiring a single residential property worth more than £500,000, unless specific exemptions apply (e.g., property rental business, property development).

Key points to remember about the surcharge:

• The 3% surcharge applies to the entire purchase price across every band, not just the portion above a threshold.
• Married couples and civil partners are treated as a single unit — if one spouse owns a property, both are treated as additional-property purchasers.
• The surcharge applies even if you are replacing your main residence, unless you sell your old home on or before the date of completion of the new purchase.
• Non-UK residents pay an additional 2% surcharge on top of the rates above, regardless of whether it is a first, second, or subsequent purchase.

Use our Stamp Duty Calculator to instantly compare costs across all three buyer types for any property price.

First-Time Buyer Relief: Who Qualifies and What You Save

First-time buyer relief is one of the most valuable SDLT concessions available, but the eligibility rules are strict and frequently misunderstood. Getting them wrong — or assuming you qualify when you do not — can result in an unexpected tax bill at the point of completion.

Full Eligibility Conditions

• Never owned before: You must never have owned or had an interest in a residential property, anywhere in the world. This includes inherited properties, properties received as gifts, and buy-to-let investments owned in a previous relationship.
• All buyers must qualify: If you are buying jointly, every person named on the title deeds must be a first-time buyer. A single co-buyer who previously owned a property disqualifies the entire purchase from relief.
• Main residence only: The property must become your main home. You cannot claim relief on a buy-to-let or holiday home purchase, even if it is your first property.
• Price cap of £500,000: Relief only applies to purchases up to £500,000. Above this threshold, standard SDLT rates apply to the full purchase price — you receive no partial relief.

Concrete Savings Examples

The table below shows what a first-time buyer pays versus what a standard buyer would pay at three common price points, illustrating the real-money value of the relief:

At £250,000 the saving is modest but meaningful. At £350,000 and £500,000, first-time buyer relief saves £5,000 — enough to cover a full structural survey, solicitor fees, or a significant portion of moving costs. Buyers at exactly £500,000 capture the maximum relief; those buying at £501,000 or above lose it entirely and pay full standard rates on the whole sum.

Check your exact saving using our Stamp Duty Calculator — toggle between first-time buyer and standard buyer to see the difference in real time.

How to Calculate SDLT Step by Step

SDLT is a progressive tax, calculated in slices — exactly like income tax. You do not pay the headline rate on the entire purchase price. Instead, each portion of the price that falls within a given band is taxed at that band's rate only. Here is the full worked calculation for a £425,000 property, shown for both a first-time buyer and a second-home buyer.

Worked Example: £425,000 Purchase — First-Time Buyer

From 1 April 2025, the first-time buyer nil-rate threshold is £300,000. The relief band runs from £300,001 to £500,000 at 5%.

Total SDLT payable (first-time buyer): £6,250 — an effective rate of 1.47% on the purchase price.

Same Property — Standard (Non-First-Time) Buyer

A standard buyer uses the post-April 2025 rate schedule with a nil-rate threshold of £125,000:

Total SDLT payable (standard buyer): £11,250 — an effective rate of 2.65%.

Same Property — Second Home / Buy-to-Let Buyer

A buyer purchasing an additional property adds 3% to each band:

Total SDLT payable (second home): £24,000 — an effective rate of 5.65%. That is £12,750 more than the standard buyer for the identical property, entirely due to the surcharge.

The difference between a first-time buyer (£6,250) and a second-home buyer (£24,000) on the same £425,000 property is £17,750 — underlining why understanding which band you fall into before exchange of contracts is essential.

When Must You Pay Stamp Duty? Deadlines and Penalties

SDLT is not optional and the deadline is firm. Missing it triggers automatic penalties and interest, and HMRC takes late filing seriously regardless of whether you were aware of the rules.

The 14-Day Window

You must file an SDLT return and pay any tax due within 14 days of the effective date of the transaction. In the vast majority of residential purchases the effective date is the date of completion — not exchange of contracts. The clock starts the morning after completion.

In practice, your solicitor or licensed conveyancer will file the return and make payment on your behalf as part of the completion process. You should confirm this is included in their service and that funds to cover the SDLT bill are available in the completion account on the day.

Penalties for Late Filing or Late Payment

If the return is not filed and payment is not received by HMRC within 14 days, the following penalty and interest structure applies:

For a property attracting even a modest SDLT bill of £5,000, a 12-month delay could add a further £5,000 in tax-geared penalties plus accrued interest — effectively doubling the liability. HMRC can also open an enquiry into any SDLT return up to nine months after it is filed if they suspect the self-assessed value is incorrect.

Who Actually Files the Return?

While the legal obligation to file rests with the purchaser, in practice a solicitor or conveyancer acting for the buyer handles the submission electronically via HMRC's SDLT online service. They collect the relevant information — purchase price, property type, buyer classification — during the conveyancing process and submit on or before completion. Always verify with your conveyancer that SDLT filing is included in your instruction and that you have provided correct information about any previous property ownership, as errors can result in penalties even where they are innocent mistakes.

SDLT vs LBTT vs LTT: Scotland and Wales Have Different Rules

One of the most common misconceptions among UK property buyers is that the same stamp duty rules apply across the entire United Kingdom. They do not. Property taxation is devolved, and Scotland and Wales both operate entirely separate regimes with different rates, thresholds, and relief structures. If you are buying in Scotland or Wales, the information in this guide — and the rates in our calculator — does not apply to you.

Scotland: Land and Buildings Transaction Tax (LBTT)

Scotland replaced SDLT with LBTT in April 2015. The tax is administered by Revenue Scotland, not HMRC. Rates for residential purchases in 2025–2026 are:

Scotland's first-time buyer relief raises the nil-rate threshold to £175,000 (saving up to £600). An Additional Dwelling Supplement (ADS) of 6% applies to second or additional properties — higher than the 3% SDLT surcharge in England.

Wales: Land Transaction Tax (LTT)

Wales introduced LTT in April 2018, replacing SDLT for Welsh transactions. The tax is administered by the Welsh Revenue Authority. Rates for residential purchases in 2025–2026 are:

Wales does not currently offer a dedicated first-time buyer relief. An additional 4% Higher Residential Rates surcharge applies to additional property purchases in Wales.

Which Rules Apply to You?

• Buying in England or Northern Ireland: SDLT applies. Use the rates in this guide and our Stamp Duty Calculator.
• Buying in Scotland: LBTT applies. Use the Revenue Scotland LBTT calculator at revenue.scot.
• Buying in Wales: LTT applies. Use the Welsh Revenue Authority LTT calculator at gov.wales.

The location of the property determines which tax applies — not where you live or where you are registered for tax purposes. A London resident buying a holiday home in the Scottish Highlands pays LBTT, not SDLT.

Frequently Asked Questions

What is the first-time buyer SDLT threshold in 2025?

From 1 April 2025, first-time buyers pay 0% SDLT on the first £300,000 of a property's purchase price, and 5% on the portion between £300,001 and £500,000. There is no relief available for properties priced above £500,000 — standard rates apply to the full purchase price. The relief is only available if every buyer named on the purchase is a genuine first-time buyer, the property will be used as a main residence, and the total consideration does not exceed £500,000.

How long do I have to pay stamp duty after completion?

You have exactly 14 days from the effective date of the transaction — which is almost always the completion date — to file your SDLT return and pay any tax due to HMRC. This is a strict statutory deadline. If you are using a solicitor or conveyancer, they handle this on your behalf and fund the payment from your completion monies. Confirm with them before completion that SDLT filing is included in their remit and that you have transferred sufficient funds to cover the bill.

Does stamp duty apply to mixed-use properties?

Yes, but at different rates. A mixed-use property — one that contains both residential and non-residential elements, such as a flat above a shop — attracts the non-residential SDLT rates rather than residential rates. Non-residential rates are generally lower: 0% up to £150,000, 2% from £150,001 to £250,000, and 5% above £250,000. Buyers sometimes deliberately structure purchases to qualify as mixed-use to reduce their SDLT liability, though HMRC scrutinises such arrangements closely and has challenged a number of claimed mixed-use classifications in tribunal.

Can I pay stamp duty in instalments?

No. SDLT must be paid in full as a single lump sum within the 14-day deadline. HMRC does not offer an instalment plan for residential SDLT. However, if you are purchasing a property through a lease with a variable rent element, or buying land in stages under a contingent consideration arrangement, the SDLT liability may be spread across multiple return filings as the consideration crystallises over time — but this is a structural feature of those transaction types, not a payment plan. Budget for the full SDLT amount to be available on completion day.

Is stamp duty payable on off-plan purchases?

Yes, but the payment date is tied to the effective date. For off-plan new-build purchases, you typically exchange contracts months or even years before the property is completed. SDLT becomes payable 14 days after the effective date of the transaction. In most cases the effective date is the completion date, so you pay SDLT when you take legal ownership of the finished property — not at exchange. However, if you make a substantial payment (or any consideration) before completion that takes the cumulative amount over a threshold, an earlier SDLT trigger may arise. Your conveyancer should advise you on the correct point at which to file.

Can I reclaim the 3% surcharge if I sell my previous home?

Yes. If you pay the 3% additional dwelling surcharge because you complete on a new main residence before selling your existing main home, you can apply to HMRC for a full refund of the surcharge within 12 months of selling your previous main residence — provided you sell it within 3 years of completing on the new property. The refund must be claimed using an SDLT amendment return. HMRC typically processes refunds within 15 working days. Keep all completion documentation, as you will need to evidence both transaction dates.

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