Zenivra Finance Calculators

Stamp Duty (SDLT) Calculator

Estimate England and Northern Ireland SDLT using current standard residential bands and first-time buyer relief.

Estimated SDLT£0
Effective Rate0%
Total Cash Needed (Price + Tax)£0

How Stamp Duty is calculated

Stamp Duty Land Tax (SDLT) is charged on residential purchases in England and Northern Ireland. Like Income Tax, it uses bands: each rate applies only to the part of the price that falls within that band. This calculator applies the rates in force since 1 April 2025, with an option for first-time buyer relief.

It covers a single main residence. Buyers of an additional property pay a 5% surcharge on every band, and non-UK residents pay an extra 2%; neither is included in the result.

Worked example with the default values

For a purchase price of £425,000:

  • Home mover: 0% on £125,000 + 2% on £125,000 (£2,500) + 5% on £175,000 (£8,750) = £11,250
  • First-time buyer: 0% on £300,000 + 5% on £125,000 = £6,250
  • Additional property (with the 5% surcharge): £32,500

Relief for first-time buyers only applies when the price is £500,000 or less. Above that, standard rates apply to the whole price.

Current residential bands (England and Northern Ireland)

  • Up to £125,000: 0%. £125,001 to £250,000: 2%. £250,001 to £925,000: 5%.
  • £925,001 to £1.5 million: 10%. Above £1.5 million: 12%.
  • First-time buyers: 0% up to £300,000 and 5% from £300,001 to £500,000.
  • Scotland (LBTT) and Wales (LTT) have separate taxes with different bands.

Want the full explanation? Read our guide: UK Stamp Duty Explained, Including First-Time Buyer Relief.

How to use the Stamp Duty (SDLT) Calculator

  1. Enter income and tax settings as accurately as possible.
  2. Read the estimate as a planning figure rather than a final filing result.
  3. Use the output to judge after-tax impact before making a decision.

SDLT banded calculation

Total SDLT = sum of the tax charged within each price band

  • Purchase price: Property price
  • Bands: Price ranges taxed at different SDLT rates
  • Buyer status: Conditions such as first-time buyer treatment

Stamp Duty is banded, so each slice of the purchase price is taxed at the rate for that band rather than one flat rate on the whole value.

Quick planning notes for the Stamp Duty (SDLT) Calculator

Estimate UK stamp duty with first-time buyer option. Start with a realistic baseline, then change one input at a time to see how the result moves. That makes it easier to compare scenarios and spot the trade-offs that matter most.

Tax planning notes

  • Treat this as an educational estimate and verify official rates, thresholds, and allowances before filing.
  • Run scenarios at different income levels to understand how rate changes affect net outcomes.
  • Use salary and retirement tools alongside tax estimates to see the practical impact on take-home pay.

Keep in mind

These results are designed for educational planning. Real-world figures can change based on official rates, lender fees, tax treatment, insurance, and personal circumstances.

More pages related to this topic

Tax calculators UK calculators hub

Frequently asked questions

Who qualifies as a first-time buyer?

Someone who has never owned a home anywhere in the world and will live in the property as their main residence. If buying jointly, everyone buying must qualify.

When is Stamp Duty paid?

Within 14 days of completion. Your conveyancer usually files the return and pays it from the funds you send before completion.

Can I add Stamp Duty to my mortgage?

Usually not directly; it is paid in cash at completion. Some buyers borrow more to cover it, which increases the loan and the interest paid.

Do I pay the surcharge if I have not sold my old home yet?

Usually yes, but you can normally reclaim it if you sell your previous main home within three years.

Guides on this topic

Plain-English explanations to help you read the result above.

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