Exchange of contracts and completion: what happens and when

Exchange is the point where the move becomes legally binding. Completion is the day the money moves and you get the keys. Booking removals before exchange is the single biggest cause of lost deposits on move day.

7 min read · Updated 2026

The two dates. Explained

At exchange. Both solicitors swap signed contracts and the completion date is fixed. From this moment. Pulling out costs you the deposit. Usually 10% of the purchase price.

At completion. Funds transfer between solicitors. The seller's keys are released to the agent. And the property legally becomes yours. Most completions land between 11am and 2pm. Which is why removal crews start early.

How long between exchange and completion?

How long between exchange and completion?
GapSuitsRisk
Same dayCash buyers. No chainNo time to book a remover at normal rates
1–2 weeksThe most common arrangementComfortable if removals are provisionally booked
3–4 weeksLong chains. School-term movesHigher chance of circumstances changing

Booking removals around exchange

  • Hold a provisional date with your remover as soon as a completion date is proposed.
  • Choose a firm that will move a provisional date free of charge before exchange.
  • Only pay a non-refundable balance after contracts are exchanged.
  • Ask what the charge is for a delayed completion. A good firm will quote a waiting rate rather than re-charge the full job.

What can still go wrong on completion day

  • Funds arriving late in a long chain. Pushing key release into the afternoon.
  • The seller not having fully vacated the property.
  • Bank cut-off times. Typically around 3pm. That push completion to the next working day.
  • Insurance: your buildings cover should start at exchange. Not completion.

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