Completion day is the final step in buying or selling a home in the UK.
It’s the day ownership legally transfers, funds move between solicitors, and you finally collect your keys.
I’ve walked buyers through this stage enough to know most people reach completion day with no idea what happens hour by hour, or what their solicitor is doing in the background.
This blog breaks down exactly what happens on completion day, from the first fund transfer in the morning to the moment you collect your keys, plus the seller’s side and common questions.
What Is Completion Day?
Completion day is the date on which a property sale becomes final. The buyer’s solicitor sends the purchase money to the seller’s solicitor.
Once the funds arrive, the seller’s solicitor confirms completion and tells the estate agent to release the keys.
At that moment, the buyer becomes the legal owner of the property.
Completion date and completion day mean the same thing: the date agreed by both sides for ownership to change hands.
There is a difference between exchange and completion, though. When you exchange contracts, the sale becomes legally binding.
But you do not own the property yet. Completion is when ownership transfers.
According to the HomeOwners Alliance, completion usually happens 7 to 28 days after exchange. The date is agreed upon by both parties at the time of exchange.
Completion Day Process: From Money Transfer to Getting the Keys
Most of the action on completion day happens behind the scenes. Your solicitor handles the legal and financial work while you manage the move. Here is how the process unfolds.
1. Funds Are Transferred
The buyer’s solicitor sends the purchase money through the CHAPS banking system. This is a same-day electronic transfer.
It includes both the mortgage funds and any remaining deposit. Transfers generally begin in the morning, with funds usually sent between 9 am and 11 am.
2. The Seller’s Solicitor Confirms Receipt
Once the seller’s solicitor receives the full amount, they confirm that completion has taken place. This is the legal moment ownership changes hands.
They then contact the estate agent and authorize the release of the keys. This step often happens between 12 pm and 2 pm, depending on the length of the property chain.
3. Keys Are Released
The estate agent calls the buyer to confirm the keys are ready for collection. In most cases, keys are held at the estate agent’s office until this confirmation comes through.
You should not collect keys before your solicitor tells you that completion has happened. Doing so before funds are confirmed can cause legal complications.
4. You Move In
Once you have the keys, the property is legally yours. You can move in straight away or at a time that suits you.
If you are carrying out work before moving in, you do not need to move in on the day itself.
A Typical Completion Day Timeline
One of the biggest frustrations on completion day is not knowing when things will happen.
Timings below are typical ranges, not fixed points; they shift depending on your chain length, your lender, and how early funds start moving that morning.
| Time | What Happens |
|---|---|
| 9 am–11 am | Your solicitor receives the mortgage funds from your lender and sends the full purchase amount to the seller’s solicitor via CHAPS. |
| 11 am–1 pm | Funds are confirmed received. In a chain-free sale, this is usually when keys are released; in a chain, the first buyer at the bottom collects theirs. |
| 1 pm–2 pm | In a chain, funds move up to the next solicitor, who confirms and releases the next set of keys. |
| 2 pm–4 pm | In longer chains, this process repeats up the line until the final buyer at the top completes. |
For chain-free purchases, completion often wraps up before midday. In longer chains, the process can run well into the afternoon, and it’s not unusual for a solicitor to still be confirming things after 4 pm.
Pro Tip: Do not book your removal van to arrive first thing in the morning. You could be waiting several hours for the call. Keep your plans flexible and your phone charged.
What Happens on Completion Day for Sellers
The seller’s side of completion day is just as important, but most guides give it very little attention.
As a seller, you must vacate the property by 1 pm on completion day. For longer chains, this deadline may be extended to 2 pm.
You should not hand over the keys until your solicitor confirms that the funds have been received.
What your solicitor does for you as a seller:
- Requests a redemption statement to confirm how much is left on your mortgage.
- Receives the purchase funds from the buyer’s solicitor.
- Uses those funds to pay off your mortgage in full.
- Pays your estate agent’s fees from the sale proceeds.
- Sends you the remaining balance after all deductions are applied.
If you are selling one property and buying another on the same day, both completions happen in sequence. Your sale proceeds are passed along the chain and used toward your onward purchase.
What Your Solicitor Does Behind the Scenes
Your solicitor manages several important legal and financial tasks to ensure the property transfer is completed correctly.
The table below summarises their key responsibilities before, during, and after completion day.
| Stage | What Your Solicitor Handles |
|---|---|
| Before completion | Checks mortgage conditions, requests funds, completes final searches, prepares the completion statement, and confirms signed documents. |
| On completion day | Transfers purchase funds through CHAPS, confirms completion, and informs you and the estate agent. |
| After completion | Registers ownership with HM Land Registry and arranges Stamp Duty Land Tax payment to HMRC. |
What If Completion Day Is Delayed?
Delays on completion day are stressful but not unusual. Knowing the most common causes helps you prepare.
Common reasons for delays:
- The mortgage lender releases funds later than expected.
- Bank transfers slow down due to high volumes or fraud checks.
- A property further up the chain faces a last-minute issue.
- The seller has not vacated the property on time.
According to ONP Solicitors, if funds do not clear by around 4 pm, completion may need to be pushed to the next working day. This does not mean the sale falls through. Both parties simply agree to a new date.
If one party causes the delay, the contract typically allows the other to charge daily interest. This gives everyone a strong reason to keep things moving.
What to do if there is a delay:
- Stay contactable by phone throughout the day.
- Call your solicitor for updates rather than assuming the worst.
- Keep your removal van on standby with a flexible arrival time.
- Do not hand over or accept keys until your solicitor confirms completion.
Can Exchange and Completion Happen on the Same Day?
Yes, this is called a simultaneous exchange and completion. It works in some situations, but it is not the standard approach in the UK property market.
When it can work:
- Cash purchases with no chain: Fewer parties are involved, making same-day completion easier to arrange.
- Vacant properties where no one needs to move out first: There is no delay caused by sellers moving out.
- New build purchases with a fixed handover date: Developers often set clear completion dates in advance.
When it carries more risk:
- Mortgage purchases: Some lenders require a gap between exchange and completion to complete final checks.
- Properties in a chain: A delay from one buyer or seller can affect the entire transaction.
- Transactions with possible last-minute issues: Unexpected legal or financial problems can delay completion.
If you are considering a same-day exchange and completion, speak to your solicitor and mortgage lender before committing.
They will confirm whether it is possible and highlight any additional costs or requirements.
New Build Completion Day: What Is Different
New build completions follow the same legal process as any other purchase. However, there is one key difference buyers should know about.
Every new build contract includes a long-stop date. This is the latest date by which the developer must hand the property over to the buyer.
If the property is not ready by that date, the buyer can legally cancel the contract and reclaim their deposit.
New-build completions tend to occur earlier in the day. The developer usually sets the handover time, which is often in the morning.
For shared ownership buyers, the process is largely the same. The difference is that you are buying a percentage of the property rather than the full market value.
Wrapping It Up
Completion day can feel unpredictable, but once you know what happens on completion day, most of the stress disappears.
Funds move, ownership transfers, and the keys end up in your hand, usually without drama.
I’ve found that buyers who understand the timeline in advance handle delays more calmly than those caught off guard.
Trust your solicitor, keep your phone charged, and stay flexible if delays occur.
If your own completion day is coming up, call your solicitor a few days before to confirm the chain’s on track.
Frequently Asked Questions
Do You Need to Be Present on Completion Day?
No. Your solicitor handles the transfer and paperwork. You just need to be reachable to collect keys or arrange access for your removal team.
Can Completion Happen on a Weekend?
No. Completion only happens on weekdays, since banks, solicitors, and estate agents all need to be open to transfer funds.
Does Completion Day Always Happen on a Friday?
No. Friday is the most popular choice since it gives buyers the weekend to settle in, but completion can happen on any weekday.
When Does Your New Mortgage Start on Completion Day?
Your new mortgage starts on completion day itself, the same day your solicitor transfers funds and the seller’s mortgage is redeemed.
