Buy-to-Let Purchase Cost Calculator: Stamp Duty, Fees & Total Cash Needed

The purchase price is rarely the number that decides whether a buy-to-let deal works. Stamp duty carries a 5% surcharge on top of the ordinary bands in England and Northern Ireland (8% under Scotland's Additional Dwelling Supplement, its own higher-rate table in Wales), then legal fees, a survey, the Land Registry's own charge, a mortgage arrangement fee and — if you use one — a broker's fee all land before completion. This calculator adds every one of those to your deposit, so you can see the actual cash you need on completion day and the true cost of the acquisition once every fee is in.

How the total is built

Enter the price and your deposit percentage, then pick the nation — stamp duty is genuinely three different taxes: Stamp Duty Land Tax (SDLT) in England and Northern Ireland, Land and Buildings Transaction Tax (LBTT) in Scotland, Land Transaction Tax (LTT) in Wales — each with its own bands and its own surcharge on an additional property, taken from the current government tables (the same tables behind our stamp duty calculator). The tool assumes a standard buy-to-let purchase — the additional-property surcharge applies — unless you switch the buyer type to the rare case where this purchase replaces your only home.

The Land Registry fee

HM Land Registry charges a flat fee by price band to register the purchase — not a percentage — and the figure here uses the portal/e-services rate for a whole-title transfer, which is how almost every conveyancer files today (the same scale as our Land Registry fee calculator, which also covers the post and part-title rates this tool doesn't need). That scale covers England and Wales, which share one land register. Scotland's equivalent register is run separately by Registers of Scotland on its own fee scale, so this calculator doesn't estimate it for a Scottish purchase rather than guess; Northern Ireland's Land & Property Services fee also differs slightly from the England & Wales figure shown here.

Conveyancing, survey and mortgage fees — what's typical

The defaults come from MoneyHelper, the government-backed money-guidance service: legal fees “usually about £2,000” plus £250-£300 for local searches; a Level 2 (HomeBuyer) survey from around £400 up to £1,500 depending on the property's value; and a mortgage arrangement or product fee of £1,000-£2,000 or more. A mortgage broker, where you use one, typically charges around £500 — 2026 market research from Boon Brokers puts the average purchase fee at £643 and £500 as the single most common figure, though many brokers are fee-free and paid by the lender instead. Every field is editable; these are starting points, not quotes.

Capital cost vs a Section 24 finance cost

Not every pound is treated the same way by HMRC. The purchase price, stamp duty, the Land Registry fee, your legal fees and the survey are all “incidental costs of acquisition” under HMRC's Capital Gains Manual (CG15250) — they go on the property's cost base and reduce the gain when you eventually sell, rather than reducing this year's rental profit. Refurbishment carried out before the property is first let usually works the same way: HMRC's Property Income Manual (PIM2030) treats putting a property into a lettable state as capital, particularly where the price paid reflected its poor condition — a genuine repair after the tenancy has started is normally different, and treated as revenue.

The mortgage arrangement fee and any broker fee are different again. HMRC accepts them as a cost of the property business (PIM2105) — but for an individual landlord they count as a “finance cost” alongside the mortgage interest itself, so Section 24 applies: since 2020/21 none of it comes off your rental income directly, and instead you get a flat 20% tax reducer on the amount (PIM2054) — rising to 22% from 6 April 2027 under the Budget 2025 changes. A limited-company landlord isn't affected by this restriction — see our limited company vs personal tax calculator for that comparison.

Where else these numbers show up

Once you know what the purchase costs, check whether the rent will actually cover the mortgage on our mortgage stress test calculator, and whether the yield stacks up on our rental yield calculator.

Stamp duty, LBTT and LTT bands: gov.uk, revenue.scot and gov.wales, verified 29 August 2026 (site data file). HM Land Registry Scale 1 fees: gov.uk “HM Land Registry: Registration Services fees”, effective from the 9 December 2024 fee order, read 13 September 2026. Typical legal, search, survey and mortgage-fee figures: MoneyHelper, “Mortgage fees and costs when buying or selling a home”, read 13 September 2026. Mortgage broker fee: Boon Brokers, “Average Mortgage Broker Fees Charged in the UK [2026 Research]”, read 13 September 2026 — market research, not an official rate. Capital vs revenue treatment: HMRC Capital Gains Manual CG15250 and Property Income Manual PIM2030, PIM2054 and PIM2105, gov.uk, read 13 September 2026. General information, not advice — get a formal mortgage illustration and a solicitor's quote before relying on these figures.