When do you pay stamp duty?

The usual deadlines

For ordinary home purchases the effective date is usually completion. Some arrangements can trigger a different effective date, so ask the conveyancer to confirm rather than assuming the day you collect the keys always controls.

Why your conveyancer asks for the money earlier

The statutory deadline is not necessarily the day your solicitor will request funds. A completion statement may include the purchase balance, tax, legal charges and other payments needed to complete the transaction. Your conveyancer may file and pay on your behalf at or shortly after completion.

Ask when cleared funds must be available and how payment details will be verified. Keep the tax estimate separate from your mortgage deposit: the calculator’s “price plus tax” figure is not the amount of cash you personally need if a lender is funding part of the price.

A £0 result does not settle the filing question

A relief or nil-rate band can reduce tax to zero while leaving a return requirement in place. Claiming first-time buyer relief, for example, is not the same as having an exempt transaction. Your conveyancer should confirm whether a return is needed and which relief is being claimed.

Once filed, retain the return and payment confirmation with your purchase records. Those details can be useful if you later correct an error or seek a higher-rate repayment.

If something changes before completion

Tell your conveyancer if the price changes, another purchaser joins, a related sale is delayed or the intended use changes. Any of those facts may affect the return or the amount due. Recalculate before sending the final balance.

Late filing and late payment can create penalties or interest. If a deadline has been missed, contact the relevant tax authority or your adviser promptly rather than assuming a later property registration will resolve it.