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You have scraped together a £30,000 deposit, your mortgage is approved in principle, and you have finally found a semi-detached house in Manchester for £450,000. You are ready to exchange contracts.
Then your solicitor sends you the completion statement, and there is an unexpected line item demanding an extra £7,500 in cash. Welcome to the reality of Stamp Duty Land Tax (SDLT) in 2027.
Stamp Duty is a tax you pay to the government when you buy property in England and Northern Ireland. (Scotland has the LBTT and Wales has the LTT). For first-time buyers, miscalculating this properly is one of the most common reasons purchases become unaffordable at the last minute.
First-Time Buyer Relief (2026–27 Published Rules)
The government offers first-time buyer relief designed to protect cheaper properties from SDLT entirely. The thresholds below are the rates published by HMRC and in force since 1 April 2025 — still the published schedule for 2026–27, unless changed at a fiscal event. Always confirm the current position on GOV.UK before exchanging contracts.
- Up to £300,000: You pay ZERO Stamp Duty.
- From £300,001 to £500,000: You pay 5% on the portion of the price above £300,000.
- Above £500,000: You lose all first-time buyer relief and pay the standard rates on the whole price.
The Math: £450,000 House Example
Let's go back to our £450,000 house in Manchester. Because it is above the £300,000 nil-rate band, you will pay SDLT, but only on the excess amount.
- The first £300,000: Tax-free (£0).
- The remaining £150,000: Taxed at 5% = £7,500.
Total Stamp Duty Bill: £7,500.
If you were NOT a first-time buyer, purchasing that exact same house would cost you £12,500 in Stamp Duty under standard rules (2% on the £125,001–£250,000 band, plus 5% on the portion above £250,000). The first-time buyer relief saved you £5,000.
The £500k Cliff Edge
If you are buying in London or the South East, £500,000 is a very dangerous number. If the property price is exactly £500,000, your SDLT bill as a first-time buyer is £10,000.
If you offer just £1 more (£500,001), you instantly lose all first-time buyer relief. Your tax bill instantly jumps to £15,000. Never, ever offer just over the £500,000 threshold.