Completion day is the day everything becomes real.
It is when legal ownership of your new home transfers from the seller to you, when the money moves through the system, and when — at some point during the day — someone hands you a set of keys.
For most buyers, it is also the most nerve-wracking day of the entire process — not because anything dramatic is likely to happen, but because so much of it is outside your direct control. Solicitors, banks, estate agents, and everyone else in the chain need to play their part before you get those keys.
Understanding exactly what happens on completion day, who does what, and when to expect things to move reduces the stress significantly. This guide explains the full picture — from early morning fund transfers to the moment you open your new front door.
London Stays covers UK property guides and area insights for buyers, renters, and landlords across the country.
What Is Completion Day?
Completion day is the final stage of the house-buying process. It is the day on which:
- The buyer’s solicitor transfers the purchase funds to the seller’s solicitor
- Legal ownership of the property officially transfers from seller to buyer
- The mortgage (if any) is drawn down by the lender and paid over
- The seller vacates the property
- The keys are released and the buyer moves in
It always takes place on a weekday, because banks, solicitors, and estate agents all need to be open to process the fund transfers that make everything else possible.
Completion day is agreed between all parties in the chain when contracts are exchanged, typically one to four weeks earlier. That date is written into the contract and is legally binding — failing to complete on that date has serious financial consequences.
How Long After Exchange Does Completion Happen?
The gap between exchange of contracts and completion is typically one to two weeks, though it can range from the same day (simultaneous exchange and completion) to four weeks or more.
One to two weeks is the most common gap. It gives:
- The buyer time to arrange removals, book time off work, and organise utilities
- The seller time to vacate and hand over the property
- Solicitors time to complete the final administrative steps
- The mortgage lender time to confirm and release funds
Same-day exchange and completion does happen but carries higher risk, particularly in a chain — if anything goes wrong at the exchange stage, there is no time to fix it before the completion the same afternoon.
Longer gaps are sometimes necessary if properties need to be vacated, if there are complex chain logistics, or if certain parties need more time to arrange removals.
Friday is the most popular completion day by far — it gives buyers the weekend to unpack and settle in. The downside is that a problem on a Friday afternoon can roll into the weekend, with no banking support until Monday. Midweek completions carry lower stress risk for that reason.
What Happens on Completion Day: Step by Step
Early Morning — Funds Released
Your mortgage lender releases the mortgage funds to your solicitor’s client account. This usually happens first thing in the morning — by 9am or 10am for most straightforward cases.
Your solicitor combines these mortgage funds with the deposit you transferred earlier in the process and prepares the total purchase sum for transfer to the seller’s solicitor.
Mid-Morning — CHAPS Transfer
Your solicitor sends the purchase money to the seller’s solicitor via CHAPS (Clearing House Automated Payment System) — a same-day, high-value electronic transfer system used specifically because standard bank transfers can take hours to clear.
Even CHAPS transfers typically take between 30 minutes and two hours to arrive at the receiving bank. This is where chains create the most complexity.
How a chain completes — the sequence:
In a chain, each party is waiting for the money from below before they can send the money upward. The sequence runs from the bottom of the chain to the top:
- The first buyer (typically a first-time buyer with no property to sell) sends their funds first
- Those funds arrive at the next solicitor in the chain, who adds their client’s funds and sends upward
- This cascades up the chain until the final seller — who is not buying onwards — receives the full payment
In a three or four-party chain, this can mean the final buyer waiting until midday or early afternoon for their seller to receive confirmation of funds and authorise key release.
Late Morning to Early Afternoon — Seller Vacates
While funds are moving, the seller is clearing out the property. Under most contracts, the seller has until 1pm to vacate — extended to 2pm in longer chains.
In reality, most sellers start moving earlier and most vacate the moment they receive confirmation that funds have arrived, which triggers the key release.
This is one of the most common sources of frustration on completion day. Your removals van may be packed and waiting outside your current address while the chain completes above you. This is entirely normal.
Key Release
Once the seller’s solicitor confirms receipt of funds, they authorise the estate agent to release the keys.
You then collect the keys from the estate agent — or, in some cases, from the seller directly if that arrangement has been agreed.
For a no-chain purchase, keys are often released by 11am. For a long chain, it can be 2pm to 4pm before the top of the chain completes and keys ripple downward.
After Keys — What Happens Legally
Completion is not completely over the moment you have keys. Several things happen in the background:
Land Registry registration — your solicitor registers the change of ownership at HM Land Registry. This can take weeks to months to formally complete depending on backlogs, but it does not affect your right to occupy the property from completion day.
Stamp Duty payment — your solicitor submits and pays Stamp Duty Land Tax (SDLT) to HMRC on your behalf. This must be done within 14 days of completion. Ensure your solicitor has the funds to do this before completion day.
Mortgage registration — if you have a mortgage, your lender is registered as a charge holder on the title at the Land Registry.
Original title deeds — your solicitor retains copies; if you have a mortgage your lender holds the title documents, or they are registered electronically.
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What to Do on Completion Day as a Buyer
Take meter readings — on the day you receive the keys, take readings for gas, electricity, and water. Photograph them with a timestamp. Submit to the relevant suppliers.
Check the property — walk through the property before you start moving in. Check that everything agreed to be left (fixtures, fittings, white goods, curtains) is present. Check that nothing agreed to be taken has been removed. Any issues should be reported to your solicitor immediately while you still have a legal avenue to raise them.
Buildings insurance — should already be in place from exchange. Confirm with your insurer that cover is active.
Organise utilities — contact your new energy and water suppliers to register as the new occupant. Notify broadband providers. Set up or redirect council tax to your new address.
Change of address — notify the DVLA, HMRC, your bank, your GP, and any other organisations that need your new address.
Collect all keys — make sure you receive all available sets of keys, including any window keys, meter cupboard keys, garage keys, and key fobs for communal areas.
What to Do on Completion Day as a Seller
You need to vacate the property by the agreed time — in most cases by 1pm.
- Take your own meter readings as you leave
- Leave all keys (including any spares) with the estate agent
- Leave behind everything agreed in the contract — curtains, specified appliances, shed keys, manuals for appliances
- Take everything that was agreed to leave with you
- Clean the property to the standard agreed (typically a reasonable standard)
Once your solicitor confirms funds received, they will redeem your mortgage if you have one and send you any surplus equity. This transfer typically takes a few hours after completion is confirmed.
For more information on the legal side of buying, check: GOV.UK — buying a home
What Can Go Wrong on Completion Day?
Problems are relatively rare — but they do happen.
Delayed funds — the most common issue. Mortgage lenders sometimes release funds late; CHAPS transfers can be delayed by technical issues or high volumes. If funds do not clear by 4pm on a Friday, completion may be deferred to the following Monday, which is acutely stressful if a removal van is already loaded.
Sellers not vacating in time — a removal job that takes longer than expected can delay key handover. This is frustrating but not a legal problem in most cases.
Chain collapse — if a party elsewhere in the chain pulls out or fails to complete, the entire chain can collapse. Once contracts are exchanged, any party that fails to complete without legal justification forfeits their deposit and can face damages claims.
Banking errors — incorrect sort codes or account numbers can delay CHAPS transfers. Your solicitor should double-check these details in advance.
What to do: stay in phone contact with your solicitor throughout the day. Keep your phone charged. Have a contingency plan if completion is delayed — somewhere to stay overnight if you need it.
Completion Day Timeline: A Summary
| Time | What Is Happening |
|---|---|
| 9am | Mortgage funds released to buyer’s solicitor |
| 9–10am | Solicitor combines deposit + mortgage funds |
| 10am–12pm | CHAPS transfer to seller’s solicitor |
| 11am–1pm | Chain completes from bottom upward |
| 1pm | Seller should have vacated |
| 11am–3pm | Keys released by estate agent once funds confirmed |
| Afternoon | Buyer takes meter readings, checks property, moves in |
| Same day | Solicitor submits Stamp Duty return |
Conclusion
Completion day is the culmination of months of preparation, paperwork, and patience. For most buyers, it goes smoothly — the money moves, the keys arrive, and you open the front door to your new home.
The things most likely to cause stress are the things outside your control: fund transfer timing, chain complexity, and sellers who are slower to vacate than planned. Understanding these in advance means you can plan around them rather than be blindsided by them.
The things within your control — being organised on your side, staying in contact with your solicitor, having a contingency plan — are the ones that determine how smooth your experience is.
For more information on conveyancing, check: HomeOwners Alliance — conveyancing guide
Frequently Asked Questions
What time do you get the keys on completion day?
For a no-chain purchase, keys are typically available by 11am. In a chain, key release depends on how long the chain is — each completion in the chain must complete in sequence before the next can happen. A four-party chain may not release keys until 2pm or 3pm. Keys are released when the estate agent receives confirmation from the seller's solicitor that funds have been received in full.
Can completion be delayed on the day?
Yes, though it is uncommon. The most common causes are delayed mortgage fund releases from lenders and slow CHAPS transfers in long chains. If completion cannot happen by 4pm on the agreed day, it is typically postponed to the next working day — which can mean an overnight wait if it happens on a Friday. This is why some buyers and sellers prefer midweek completions. Your solicitor will keep you updated throughout the day.
What should I bring or have ready on completion day?
Have your mobile fully charged and with you all day — your solicitor, estate agent, and removal company will need to reach you at short notice. Have the names and numbers of your estate agent and solicitor saved. Have your buildings insurance details to hand. Arrange for someone to be available at your current property for the removal company. Have your keys to your current property ready to hand over if you are selling simultaneously.
