Buy-to-Let Stamp Duty (SDLT) Explained: Rates, Surcharges and Costs (2026 Guide)
Buy-to-let purchases carry a 5% SDLT surcharge on top of standard rates: on a £300,000 purchase, that's £20,000 before deposit, legal fees or refurb.
Quick answer: Buying a buy-to-let, second home, or purchasing through a limited company in England or Northern Ireland means paying the Higher Rates for Additional Dwellings (HRAD): standard SDLT plus a 5% surcharge, with no nil-rate band on the surcharge portion. On a £300,000 purchase, that's £20,000 in SDLT, payable within 14 days of completion, well before any rental income arrives.
What Is Buy-to-Let Stamp Duty?
Stamp Duty Land Tax (SDLT) is charged on property or land purchases in England and Northern Ireland. If you're buying an investment property, or any residential property in addition to your main home, you normally pay the higher rates for additional dwellings: whether that's a buy-to-let, a holiday home, a second residential property, or most residential purchases made through a limited company. Scotland uses Land and Buildings Transaction Tax and Wales uses Land Transaction Tax, so this guide applies specifically to England and Northern Ireland. Buying commercial or mixed-use property instead, such as a shop with a flat above, follows a separate non-residential rate structure. Use our commercial stamp duty calculator for that scenario rather than the residential bands below.
Current Buy-to-Let Stamp Duty Rates
SDLT is progressive. Each rate only applies to the slice of the purchase price that falls within that band, not the whole amount. Rates below are current per GOV.UK's SDLT residential rates page, which lists the same figures with the higher-rates surcharge included.
| Purchase price | Standard SDLT | Buy-to-let / additional property |
|---|---|---|
| Up to £125,000 | 0% | 5% |
| £125,001-£250,000 | 2% | 7% |
| £250,001-£925,000 | 5% | 10% |
| £925,001-£1.5 million | 10% | 15% |
| Above £1.5 million | 12% | 17% |
Example: Stamp Duty on a £300,000 Buy-to-Let
| Tax band | SDLT due |
|---|---|
| First £125,000 at 5% | £6,250 |
| Next £125,000 at 7% | £8,750 |
| Remaining £50,000 at 10% | £5,000 |
| Total SDLT payable | £20,000 |
That's on top of your deposit, legal fees, mortgage costs, and any refurbishment budget, not instead of them.
Who Pays the Additional 5% Surcharge?
The higher rates generally apply if, at the end of the transaction, you own more than one residential property and aren't replacing your only or main residence. Common triggers: buying your first buy-to-let while keeping your own home, buying a second home or holiday property, or purchasing residential property through most limited companies. Whether the surcharge applies depends on your specific circumstances, so get professional advice if your situation is anything but a straightforward second purchase.
Buying Through a Limited Company
Many professional landlords buy through a Special Purpose Vehicle (SPV) limited company. In most cases, a company purchasing residential property pays the higher SDLT rates even on its first-ever acquisition. Incorporating doesn't reset the additional-dwelling position. Buying through a company can carry commercial or tax advantages in some situations, but weigh it against accounting, mortgage, and legal advice before committing, not the SDLT line alone.
Overseas Buyers
Non-UK residents buying residential property in England or Northern Ireland can also owe a 2% non-resident SDLT surcharge (per GOV.UK's non-UK resident SDLT guidance), on top of any applicable higher rates. Total SDLT payable depends on the buyer's tax residency status and the nature of the purchase.
Married Couples and Civil Partners
HMRC generally treats married couples and civil partners living together as a single unit when deciding whether the higher rates apply. If one partner already owns another residential property, that affects the SDLT position on a new purchase even if the other partner owns nothing. Ownership structures involving previous properties or inherited interests get complicated fast. Get advice before exchanging, not after.
Are There Any Exemptions?
Replacing Your Main Residence
If you buy your new home before selling your previous main residence, you may have to pay the higher rates upfront. If you then sell your previous main residence within the applicable time limit, you can usually claim a refund of the surcharge, provided you meet HMRC's conditions.
Properties Under £40,000
Residential properties bought for less than £40,000 generally fall outside the scope of the higher rates altogether.
Mixed-Use and Commercial Property
Commercial buildings and genuinely mixed-use properties (shops with flats above, offices, warehouses, agricultural land, and some mixed commercial/residential investments) are taxed under different SDLT rules and don't normally attract the residential higher-rate surcharge.
Houseboats and Mobile Homes
Houseboats, caravans, and mobile homes generally sit outside the SDLT regime entirely.
Why Stamp Duty Matters to Investors
Many new investors focus entirely on mortgage affordability and treat SDLT as a rounding error. It isn't. It increases the cash needed to complete and directly affects cash-on-cash return, ROI, the refurbishment budget actually available, portfolio growth pace, and refinancing strategy. For BRRR investors specifically, SDLT is part of total capital invested and belongs in the profitability analysis from day one, not bolted on afterwards.
Calculate Your Investment Costs Before You Buy
Model the full acquisition cost before making an offer, not just the headline purchase price. Our stamp duty calculator gives you the exact SDLT figure for standard, first-time-buyer, and additional-dwelling purchases, and our deal analyser folds that figure into deposit, mortgage, refurb, and rental yield so you're working from your real total cost, not an estimate. SDLT is only the tax you pay going in. Our UK landlord tax guide covers what you'll owe every year you hold the property and when you eventually sell, including our capital gains tax calculator for the exit side of the same deal.
Frequently Asked Questions
When do I pay Stamp Duty?
An SDLT return normally needs to be submitted and any tax due paid within 14 days of completion. In most transactions your conveyancing solicitor prepares the return and arranges payment on your behalf.
Can I add Stamp Duty to my mortgage?
Usually not. SDLT is normally paid from your own funds alongside your deposit and other completion costs, not financed through the mortgage.
Can Stamp Duty be deducted from rental income?
Generally no. SDLT isn't usually an allowable expense against rental income for income tax purposes. It can, however, form part of your acquisition costs for Capital Gains Tax when you eventually dispose of the property, depending on the circumstances.
Do first-time buyers pay the additional SDLT rates on a buy-to-let?
First-Time Buyer Relief only applies when you're buying a property to live in as your only or main residence. Someone buying purely as an investment doesn't qualify for that relief, and whether the higher rates apply instead depends on their overall property ownership position at the end of the transaction.
Key Takeaways
- Buy-to-let purchases usually attract the higher SDLT rates.
- The additional surcharge can significantly increase your upfront investment cost.
- Companies purchasing residential property generally pay the higher rates too, even on a first acquisition.
- Mixed-use and commercial properties follow different SDLT rules entirely.
- Always include Stamp Duty when calculating investment returns, not just the purchase price.
This article is for general information only and isn't legal, tax, or financial advice. SDLT rules can change, and individual circumstances affect what's actually payable. Get advice from a qualified solicitor or tax adviser before proceeding with a purchase.