Buying a buy-to-let usually costs more in stamp duty than buying a home to live in, because of an extra surcharge on additional properties. This guide explains buy-to-let stamp duty and the surcharge: the rates, worked examples, when it applies, how companies are treated, and why you should budget for it carefully.
The additional-property surcharge
When you buy a buy-to-let or other additional property, you usually pay a stamp duty surcharge, currently 5%, on top of the standard rates, charged on each band of the price. This surcharge applies because you are buying a property in addition to your main home, and it significantly increases the stamp duty compared with buying a home to live in, as our guide to stamp duty when moving explains.
The standard rates plus the surcharge
The standard residential rates since April 2025 are 0% to £125,000, 2% to £250,000, 5% to £925,000, 10% to £1.5 million, and 12% above. For an additional property, you add 5% to each of these bands. So a buy-to-let pays the standard rate plus 5% on every slice of the price, which makes the surcharge a substantial extra cost on a rental purchase.
Worked examples
Some examples show the impact. On a £200,000 buy-to-let, the standard duty would be £1,500, but with the 5% surcharge (£10,000) the total is £11,500. On a £300,000 buy-to-let, the standard duty is £5,000, plus £15,000 surcharge, totalling £20,000. The surcharge clearly adds thousands to the cost of acquiring a rental, which must be factored into your investment sums from the start.
When the surcharge applies
The surcharge applies when, at the end of the purchase, you own more than one residential property and are not replacing your main residence. Buy-to-lets, second homes and holiday homes typically attract it. If you are simply replacing your main home but temporarily own two, you may avoid or later reclaim it, as our guide to stamp duty when you move home explains, but a buy-to-let you are keeping does not qualify for that refund.
Companies pay it too
Buying a buy-to-let through a limited company also attracts the surcharge. In addition, companies buying residential property over £500,000 can face a flat higher rate (currently 17%) unless a relief applies, such as for property let commercially to unconnected tenants, which most company buy-to-let qualifies for, paying the standard rates plus surcharge instead. The company stamp duty position can be complex, so advice is wise, as our guide to limited company buy-to-let explains.
Scotland and Wales differ
The surcharge described here applies to stamp duty land tax in England and Northern Ireland. Scotland has its own Land and Buildings Transaction Tax with an additional dwelling supplement, and Wales has Land Transaction Tax with a higher residential rate, each at its own level. So if you are buying a buy-to-let in Scotland or Wales, check the rates and surcharge that apply there, as they differ from the England figures.
Budget for it carefully
Because the surcharge adds thousands to the cost of a buy-to-let, it is essential to budget for it from the outset, alongside the deposit and other fees, as our guides to buy-to-let tax and whether buy-to-let is worth it explain. The surcharge also affects your return, since it is upfront capital you will only recover when you sell, so it should feature in your investment calculations.
Why the surcharge exists
The additional-property surcharge was introduced to raise revenue and to make buying additional properties, such as buy-to-lets and second homes, less attractive relative to first-time buyers and home movers. Whatever the policy rationale, the practical effect for landlords is a significantly higher upfront tax on acquiring a rental. Understanding that the surcharge is a deliberate extra cost on additional properties helps explain why buy-to-let purchases are taxed more heavily.
The surcharge on cheaper properties
The surcharge applies even to lower-priced properties that might pay little or no standard stamp duty. Because the 5% surcharge applies from the first pound (on properties above a low threshold), a cheaper buy-to-let that a home mover would pay little duty on can still attract a meaningful surcharge. This makes the surcharge particularly noticeable on lower-value rentals, where it can form a large part of the total stamp duty.
Reliefs and special cases
There are special cases and reliefs in stamp duty, such as for purchases involving multiple dwellings or mixed-use property, and the rules can be complex. The treatment of a particular purchase depends on its specifics. Because these areas are intricate and change, it is wise to check the current rules or take advice for anything unusual, rather than assuming the standard surcharge calculation always applies in the same way.
When you are replacing your main home
The surcharge is aimed at additional properties, so if you are simply replacing your main residence, it should not ultimately apply, even if you temporarily own two homes and pay it upfront, reclaiming it when you sell the old one within the time limit, as our guide to stamp duty when moving explains. A buy-to-let you are keeping, however, is an additional property, so the surcharge stands.
Stamp duty and your return
Because the surcharge is a substantial upfront cost that you only recover when you sell, it affects the return on a buy-to-let, effectively increasing the capital you must commit and lengthening the time to profit. Including the full stamp duty, with the surcharge, in your investment calculations, as our guide to whether buy-to-let is worth it explains, gives a truer picture of the return than ignoring this large initial cost.
Plan the surcharge into your budget
Because the surcharge is paid in cash at completion and is not added to your mortgage, you must have it ready alongside your deposit and fees. For many buy-to-let purchases it is one of the largest upfront costs after the deposit, so it should be planned for from the very start of your sums, as our guide to the deposit explains. Overlooking it can leave you unable to complete.
Confirm the figure for your purchase
Because stamp duty rules and surcharge rates can change, and your exact position depends on your circumstances, it is wise to confirm the figure for your specific purchase using a current calculator or your solicitor, rather than relying on a rough estimate. Confirming the precise amount early, including the surcharge and any company or regional differences, ensures your budget and your investment calculations are accurate and you are not caught out by a larger bill.
Understood and budgeted for from the outset, the surcharge becomes simply one more known cost of investing in property rather than an unwelcome surprise, and factoring it fully into your sums keeps your view of a rental's true return realistic.
In short
Buy-to-let purchases usually attract a 5% stamp duty surcharge on top of the standard rates, charged on every band, adding thousands to the cost. It applies when you own an additional property and are not replacing your main home, so a buy-to-let you keep does not qualify for the replacement refund. Companies pay it too, with extra rules above £500,000. Scotland and Wales differ. Budget for it carefully.
Where to get help and next steps
Read our guides to moving and stamp duty, buy-to-let tax explained, and is buy-to-let worth it. This is general information, not tax, mortgage or financial advice.