UK Stamp Duty Calculator

What Changed on 1 April 2025? The New SDLT Rules Explained

The April 2025 stamp duty changes reversed the temporary measures introduced in the September 2022 mini-budget. For standard buyers, the nil-rate band — the portion of a property's price on which no tax is paid — halved from £250,000 to £125,000. This means anyone buying a home worth more than £125,000 now pays SDLT where previously they would not have.

First-time buyers were hit even harder. The zero-rate threshold for first-time buyer relief fell from £425,000 to £300,000, and the maximum property value eligible for any relief dropped from £625,000 to £500,000. A first-time buyer purchasing a £400,000 home now pays £5,000 in stamp duty, whereas before April 2025 they would have paid nothing.

For property investors and second-home buyers, the additional property surcharge increased from 3% to 5% from 31 October 2024. This applies to all bands, meaning even the portion below £125,000 — previously tax-free — now attracts a 5% charge. On a £350,000 buy-to-let, the stamp duty bill jumped from £18,000 under the old rules to £25,000 today.

Standard Residential Stamp Duty Rates (England & NI)

SDLT is calculated on a tiered, progressive basis. You do not pay the highest rate on the entire property value — instead, each rate applies only to the portion of the price that falls within that band. This is similar to how income tax works.

For a standard home mover purchasing their main residence, the current rates are: 0% on the first £125,000, 2% on the portion from £125,001 to £250,000, 5% on the portion from £250,001 to £925,000, 10% on the portion from £925,001 to £1.5 million, and 12% on anything above £1.5 million.

To illustrate, a £500,000 home attracts: £0 on the first £125,000, £2,500 on the next £125,000 (at 2%), and £12,500 on the final £250,000 (at 5%). The total SDLT is £15,000, giving an effective rate of 3%. This is the most common price bracket for family homes outside London and the South East.

For high-value properties, the top 12% band can generate substantial tax bills. A £2 million home in Kensington, for example, incurs £151,250 in SDLT — an effective rate of 7.56%. Buyers at this level often factor stamp duty into their negotiation strategy, sometimes requesting that the seller cover part of the cost or adjusting their offer downward to account for the tax.

First-Time Buyer Stamp Duty Relief: What You Need to Know

First-time buyer relief is designed to help people get onto the property ladder by reducing or eliminating stamp duty on lower-priced homes. However, the April 2025 changes have significantly narrowed who benefits and by how much.

To qualify, you must never have owned a residential property anywhere in the world — not just in the UK. If you are buying jointly, all purchasers must be first-time buyers. The property must be your main residence, and the purchase price must not exceed £500,000. If the price is above £500,000, you lose the relief entirely and pay standard rates.

Under the current rules, first-time buyers pay 0% SDLT on the first £300,000 and 5% on the portion from £300,001 to £500,000. This means a £280,000 starter home in Leeds incurs zero stamp duty. A £450,000 two-bedroom flat in Bristol costs £7,500. But a £550,000 property — common in London and the South East — attracts the full standard rate of £17,500 with no relief.

First-Time Buyer Traps to Avoid

Many buyers mistakenly believe they qualify for relief when they do not. If you previously owned a share of a property through inheritance, even if you never lived there, you are not a first-time buyer. Similarly, if your parents added your name to the deeds of their home for inheritance tax planning, HMRC may classify you as having previously owned property.

Another common pitfall is the "first-time buyer buy-to-let." If you have never owned a home but your first purchase is an investment property, you cannot claim first-time buyer relief. However, you also do not pay the additional property surcharge because you will only own one property. You simply pay standard rates.

Second Home and Buy-to-Let Stamp Duty: The 5% Surcharge

If you already own a residential property and purchase another — whether as a buy-to-let investment, a holiday home, or a property for a family member — you must pay the additional property surcharge. From 31 October 2024, this surcharge increased from 3% to 5% and applies to the entire purchase price.

The surcharge is added to every band. So the rates become: 5% up to £125,000, 7% on £125,001–£250,000, 10% on £250,001–£925,000, 15% on £925,001–£1.5 million, and 17% above £1.5 million. Even the portion below £125,000, which is tax-free for main residences, now attracts 5% SDLT.

This has made buy-to-let investing considerably more expensive. A £300,000 investment property in Liverpool now costs £15,000 in stamp duty — £5,000 more than a standard buyer would pay. Combined with higher mortgage rates, stricter lending criteria, and the phased reduction of mortgage interest tax relief, many smaller landlords are reconsidering whether property investment still stacks up.

Replacing Your Main Residence: The Exception

There is an important exception. If you are selling your main residence and buying a new one, you do not pay the surcharge even if you temporarily own two properties during the transition. However, if you do not sell your old main residence within 36 months of buying the new one, you become liable for the surcharge and must reclaim it from HMRC.

Married couples and civil partners are treated as a single unit for surcharge purposes. If one spouse owns a buy-to-let and the other buys a main residence, the surcharge still applies unless the jointly owned property is sold. Unmarried couples can be treated separately, which sometimes creates planning opportunities — though HMRC closely scrutinizes arrangements designed purely to avoid tax.

Non-UK Resident Stamp Duty Surcharge

Since 1 April 2021, non-UK residents buying residential property in England and Northern Ireland have faced an additional 2% surcharge on top of all other SDLT rates. A non-UK resident is defined as someone who was not present in the UK for at least 183 days (6 months) during the 12 months before the purchase.

This surcharge applies to the entire purchase price and stacks with the additional property surcharge. A non-UK resident investor buying a £600,000 buy-to-let could face rates of 7%, 9%, 12%, 17%, and 19% across the bands — potentially tens of thousands of pounds more than a UK resident standard buyer.

The good news is that this surcharge can be reclaimed if you become UK resident within 2 years of the purchase date. You must submit a claim to HMRC with evidence of your residency status. This makes the surcharge less of a permanent barrier and more of a timing issue for those planning to relocate to the UK.

Scotland and Wales: LBTT and LTT Explained

Stamp Duty Land Tax only applies in England and Northern Ireland. Scotland uses Land and Buildings Transaction Tax (LBTT), while Wales uses Land Transaction Tax (LTT). Both systems are broadly similar to SDLT but have different thresholds and rates.

In Scotland, LBTT rates for residential purchases are: 0% up to £145,000, 2% on £145,001–£250,000, 5% on £250,001–£325,000, 10% on £325,001–£750,000, and 12% above £750,000. First-time buyers in Scotland benefit from relief up to £175,000. The Additional Dwelling Supplement (ADS) for second homes is 6% — higher than England's 5%.

In Wales, LTT rates are: 0% up to £225,000, 6% on £225,001–£400,000, 7.5% on £400,001–£750,000, 10% on £750,001–£1.5 million, and 12% above £1.5 million. Wales does not offer first-time buyer relief, but the higher nil-rate band of £225,000 often means lower tax bills than in England for properties under that threshold.

Our calculator provides approximate equivalents for Scotland and Wales to help you compare costs across the UK. For precise figures, always use the official Revenue Scotland LBTT calculator or the Welsh Government LTT calculator.

How to Calculate Your Stamp Duty: A Step-by-Step Guide

Calculating stamp duty manually is straightforward once you understand the tiered system. Here is how to work out your liability in four steps.

Real-World Stamp Duty Scenarios

To show how stamp duty varies dramatically by buyer type, here are five realistic scenarios based on the 2025–2026 rates.

When and How to Pay Stamp Duty

Stamp duty must be paid to HMRC within 14 days of completion — the day you get the keys and the property legally becomes yours. In practice, your conveyancing solicitor or licensed conveyancer handles the SDLT return and payment on your behalf. They will typically ask you to transfer the stamp duty amount to them before completion, along with their legal fees and any search costs.

Even if no stamp duty is owed — for example, a first-time buyer purchasing below £300,000 — an SDLT return must still be submitted to HMRC in most cases. Your solicitor will file this. Failure to submit the return or pay on time results in automatic penalties: £100 for returns up to 3 months late, £200 after 3 months, plus interest on the unpaid tax.

You cannot pay stamp duty in installments or defer it. It is a lump-sum tax that must be cleared before or at completion. Some buyers use their mortgage lender's retention facility, but this is rare and usually only available for renovation projects. The most common approach is to set aside the stamp duty amount in a savings account during the conveyancing process so the funds are ready when your solicitor requests them.

Frequently Asked Questions About UK Stamp Duty