Stamp Duty Land Tax is one of the largest one-off costs of buying a home in England or Northern Ireland. On a new build, a developer will sometimes offer to pay that bill, or part of it, to sell a particular plot. The offer can be worth thousands of pounds. It is also easy to misunderstand, because a contribution towards the tax is not the same thing as a lower purchase price, and the people who qualify can be a shorter list than the brochure suggests.
How the tax is worked out
In England and Northern Ireland you pay Stamp Duty Land Tax on slices of the price, not one rate on the whole amount. From 1 April 2025, a buyer whose new home is their only home pays nothing on the first £125,000, 2% on the slice up to £250,000, 5% up to £925,000, then 10% and 12% on the slices above that. Wales and Scotland charge their own taxes, so a figure quoted for an English development does not travel with you across the border.
First-time buyers can claim a relief when every buyer is a first-time buyer, the home will be your main home, and the price is £500,000 or less. In that case the first £300,000 is charged at 0% and the rest up to £500,000 at 5%. Go over £500,000 and the relief disappears, and the ordinary rates apply to the whole price. If the purchase leaves you owning another home, an extra 5% usually applies, with a refund route if you sell your previous main home within 36 months. Someone who is not a UK resident for the tax rules can also face a 2% surcharge. Your solicitor claims any relief on the return sent to HMRC. It is not applied for you in the background.
What the developer is actually offering
“Stamp duty paid” is a selling phrase, not a single legal product. Read the small print for three things: the plots it covers, the buyers it covers, and whether it is the whole bill or a capped contribution. A phase launch, the last few plots, or homes reserved before a date are common limits. An offer for first-time buyers can vanish if one of you has owned a home before, anywhere in the world.
Ask whether the developer pays HMRC, pays your solicitor the cash to pass on, or simply reduces the price by a similar sum. Those routes feel similar on a sales sheet and behave differently in the contract, on your mortgage offer and on the tax return. Get the wording before you pay a reservation fee, and ask your solicitor to check that the contract matches what you were told.
A price cut and a paid tax bill are different
HM Land Registry treats a cash sum taken off the purchase price as a discount, and records the lower figure as the price paid. It treats the seller paying your stamp duty, your legal fees, your moving costs, or supplying carpets and white goods, as an incentive. Those incentives are not knocked off the price the Registry records.
That distinction matters for the tax as well. Stamp duty is calculated on the chargeable consideration, which starts with the price you give for the home. A genuine price reduction can lower that figure. The developer agreeing to settle the tax bill does not, by itself, reduce the price the tax is worked out on. Fixtures that are part of the building stay inside the price. Loose items such as curtains and free-standing furniture can be kept out of it, but only where the split is real, written down, and worth what the paperwork says. Your solicitor is responsible for the figure on the return.
How it sits with your mortgage and other offers
Lenders want to know about incentives because they affect how much of the price you are truly putting in yourself. Tell your broker as soon as the offer is mentioned, including the amount, whether it is cash or a price change, and whether it is tied to using the developer’s solicitor or mortgage adviser. Some lenders limit how large a seller contribution can be. Finding that out after you have reserved is a painful way to lose the plot or the deal.
Offers are often alternatives. Stamp duty paid, a deposit contribution, part exchange and a specification upgrade may not all sit on the same plot. Add them up only after someone has confirmed, in writing, which combination this home allows. Then compare that package with the price of a plot that has no incentive. A £10,000 tax contribution on a home priced £10,000 above the one next door has not made you better off.
What to know
- Check the plot, the buyer type and the end date. The development name on a banner is not the offer.
- A price reduction and a developer-paid tax bill are recorded differently, and they do not change the stamp duty sum in the same way.
- First-time buyer relief, the extra charge for owning another home, and the non-resident surcharge can all change the bill the developer has offered to cover.
- Budget for the tax at completion unless the contract says the developer is paying a stated amount.
Questions to ask the developer
- Is this the full stamp duty bill for my purchase, or a contribution up to a stated amount?
- Does it apply if I am not a first-time buyer, or if I still own another home on completion day?
- Will you pay it as cash at completion, or is the purchase price being reduced instead?
- Which other incentives do I give up if I take this one?
Sources
General information only, not financial or legal advice. Rules and offers change, so check the sources and your own adviser before you rely on a figure.