Overview
Signing papers, receiving a mortgage offer and paying money to a solicitor can all feel like the moment a house purchase becomes final. In England and Wales, they are not necessarily that moment.
Exchange and completion are distinct stages. Knowing which has happened matters if funding, moving dates or the property position changes.
Quick Answer
Exchange of contracts normally makes the purchase legally binding in England and Wales. Completion is the later stage when the purchase money is transferred and ownership passes.
They can happen on the same day, but they remain different legal steps. Scotland uses a different contracting process through missives; do not apply the exchange timetable there without your solicitor's guidance.
What Exchange Actually Changes
The parties' conveyancers formally exchange contracts on the agreed terms. The completion date is established and the contractual obligations become binding.
Signing a contract in advance is not, by itself, the same as the conveyancers exchanging it. Ask your solicitor whether exchange has actually occurred and keep the confirmation.
A mortgage offer is also separate. The lender's willingness to lend does not complete the legal checks on the sale or make the purchase contract unconditional.
Our purchase timeline guide shows how the stages fit together.
What Completion Changes
On completion, the balance of the purchase money moves through the conveyancers and the seller gives up possession under the contract. The keys are normally released once completion is confirmed.
The estate agent having keys ready does not prove the legal transfer has happened. Wait for the conveyancer's confirmation before treating the property as available to you.
Registration and other administration can continue after completion. A later Land Registry update does not mean you only become entitled to move in when the online record changes.
Exchange Deposit and Mortgage Deposit Are Not Identical
The mortgage deposit is the part of the purchase price you fund rather than borrow. The exchange deposit is the contractual sum dealt with at exchange.
Their amounts and handling depend on the transaction. Do not assume that agreeing a smaller sum at exchange necessarily limits all your liability if you later default.
For example, a buyer with a 5% mortgage deposit should ask the conveyancer how the exchange deposit is being agreed and what the contract requires. An estate agent's shorthand is not enough to establish the position.
Checks Before Authorising Exchange
Ask your conveyancer to confirm that the important conditions are resolved:
- The mortgage offer is in place and valid for the intended completion.
- Relevant lender conditions and title issues have been addressed.
- You know the total cash required and when it must arrive.
- The completion date is agreed and realistic.
- Required insurance will start at the appropriate time.
- You understand any remaining risk or special condition.
This is not a substitute for the solicitor's advice. It is a way to ensure you have asked about the practical matters most likely to disrupt the move.
What If the Mortgage Expires Between the Two?
An offer expiring before completion can leave a binding purchase without confirmed funding. Do not assume the lender must extend it because contracts have been exchanged.
Our mortgage-offer validity guide explains the checks. Confirm the expiry date early enough for any extension or replacement application to be considered before commitment.
Tell the adviser about material changes to income, commitments or circumstances. The period between exchange and completion is not a safe time to conceal a new loan or employment change.
Can You Pull Out After Exchange?
Failing to complete after exchange can have serious contractual consequences, including loss of the deposit and potential further claims. The precise position depends on the contract and circumstances.
Get urgent legal advice if completion may fail. Do not negotiate a new date privately and assume it changes the signed contract, and do not assume losing the deposit is the maximum possible cost.
Before exchange, a failed transaction can still leave you with costs already incurred, even though the purchase is generally not yet binding.
Same-Day Exchange and Completion
Same-day exchange and completion can be arranged, but it compresses the sequence. Funding, paperwork and everyone in the chain need to be ready.
Until exchange happens, there is still uncertainty about whether the transaction will go ahead. Consider that before committing to non-refundable removals or giving up accommodation.
Our completion-funds shortfall guide explains what to do if money is missing near the deadline.
Frequently Asked Questions
Browse mortgage guides. This is general legal and mortgage information, not advice on your contract. Your home may be repossessed if you do not keep up repayments on your mortgage.
