Stamp Duty Calculator
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Property Purchase Lifecycle

Understand where stamp duty fits into every stage of buying a property.

Stamp Duty Payment Timeline

1

Day 0

Completion

Ownership transfers, stamp duty liability begins

2

Day 1-14

Payment Window

SDLT return must be filed and tax paid

3

Day 14

Deadline

Late filing penalties begin if not submitted

4

After Payment

Land Registry

Property registered in your name

Key Facts About Timing

When does stamp duty become payable?

Stamp duty is triggered on completion, not exchange. Exchange is when contracts become binding, but the tax liability only starts when you actually take ownership of the property on completion day.

Who submits the return?

Your solicitor or conveyancer handles this. They submit the SDLT return to HMRC and pay the tax from the funds they hold. You pay them as part of your completion statement.

What if rates change before I complete?

You pay the rates in force on your completion date, not when you exchanged or made your offer. If there's a rate change during your conveyancing, this could affect your final bill.

What happens if payment is late?

HMRC charges penalties for late filing: £100 initially, then £10 per day after 3 months, plus 5% of the tax due after 6 months and another 5% after 12 months. Interest also accrues.

Plan Your Purchase

Calculate your stamp duty so you can budget accurately for completion.

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