What happens on completion day?

At a Glance

Completion day marks one of the most important dates in a property transaction, and understanding what happens helps sellers stay calm. In simple terms, the buyer's solicitor transfers the purchase funds to the seller's solicitor, the seller vacates the property, and the estate agent releases the keys. Most transfers are expected before 3 pm, with sellers typically out by 1 pm, though timings can vary depending on the chain and the parties involved.

What is completion day?

Completion day is the final legal stage of a property sale in England and Wales. It is the point at which ownership formally passes from the seller to the buyer, funds move between solicitors, and the buyer takes possession of the property. Everything that has happened up to this point, from the offer being accepted to the exchange of contracts, has been building toward this moment.

For sellers, it is usually the last active step in the process. The heavy lifting is done by your conveyancing solicitor, who coordinates the money transfer, confirms receipt of funds, and signals to the estate agent that keys can be released. Your job on the day is largely practical: be packed, be reachable, and be ready to hand over.

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When does completion day usually happen?

There is no fixed rule for when completion falls in the calendar. It is agreed between the buyer and seller before contracts are exchanged and then confirmed by both conveyancing solicitors. In many transactions, the completion date is set for around one to two weeks after exchange, though it can be sooner or later depending on what suits both sides and any chain arrangements.

Fridays remain a popular choice because they give buyers the weekend to unpack, but they can also be the busiest day for removal companies and solicitors' banking teams. A midweek completion date can sometimes feel calmer.

The completion day process, step by step

Although every transaction has its quirks, the sequence on the day tends to follow a familiar pattern. The table below sets out a typical timeline for a straightforward sale.

Before completion

In the days leading up to completion, your solicitor carries out a series of final checks. On the seller's side, this may include requesting a redemption statement from your existing mortgage lender so any outstanding balance can be cleared from the sale proceeds. Your solicitor will also prepare a completion statement showing all figures, including agent fees and legal costs.

On the buyer's side, the conveyancer confirms that all mortgage conditions have been met and requests the funds from the lender in time for the completion date.

On the day itself

Once the buyer's solicitor sends the money and the seller's solicitor confirms it has landed, completion is formally recorded. The buyer is notified, the estate agent is told to release the keys, and the property changes hands. Sellers should keep their phone with them throughout the day, as both the solicitor and the estate agent may need to reach them quickly.

After completion

The work does not stop the moment the keys change hands. The buyer's solicitor then registers the new ownership with HM Land Registry and, where applicable, arranges payment of Stamp Duty Land Tax. Under current rules, buyers in England and Northern Ireland have 14 days from completion to submit their SDLT return and pay any tax due.

What happens on completion day if you are in a chain

Property chains are a common feature of UK sales. A chain forms when several transactions depend on each other, so the sale of one property may need to complete before another can proceed. In these cases, the general process is the same, but timing becomes far more sensitive.

Solicitors along the chain communicate as each transaction completes. Funds move upward through the chain, and keys are released one link at a time. Because of this, buyers further up the chain sometimes wait longer in the day for their keys.

A rough example of how a four-property chain might move on completion day looks like this:

These timings can slip if any one transaction is delayed. There is not much an individual seller can do to speed things along further up the chain, but staying reachable and being ready to move out promptly helps everyone else stay on schedule.

What happens on completion day if you are not in a chain

Chain-free transactions tend to be less stressful. Without other parties depending on your completion, there is more flexibility around timings. Some buyers and sellers even agree on a slightly earlier or later key handover, or arrange to move on a different day from completion itself, though this needs to be agreed in advance with both solicitors.

Cash buyers, first-time buyers and those buying vacant properties often fall into this group. If you are selling to a chain-free buyer, you may find that everything runs to time more comfortably, giving you a calmer moving day.

The completion process for new builds

Selling or buying a new build follows a slightly different rhythm. Contracts are often exchanged with the completion date set "on notice", meaning the developer serves a notice once the property is physically ready, and completion follows within a set window, often 7 to 14 days.

During this notice period, buyers are typically invited to inspect the property and put together a snagging list. A snagging list records anything that has not been finished to a good standard, from unfinished paintwork to appliances that have not been installed correctly. Raising these before completion is generally more effective than trying to resolve them afterwards.

On the day, the buyer's solicitor sends the purchase money to the developer, and the keys are released once funds are confirmed. The buyer's conveyancer then arranges payment of Stamp Duty (if applicable) and registers the property with HM Land Registry. New build registrations can take longer than resales, as the property may not have been registered before.

Most new builds come with a structural warranty, often for 10 years. Buyers should familiarise themselves with what the warranty does and does not cover.

How to make sure completion day goes smoothly: a completion day checklist

A little preparation goes a long way. The following completion day checklist covers the practical steps most sellers find useful in the run-up to the big day.

Choosing a reliable conveyancing solicitor is one of the most important decisions in the whole process. A conveyancer who communicates well and moves quickly can be the difference between a smooth completion and a delayed one. Advice on choosing a solicitor is available through the Law Society's Find a Solicitor service.

An experienced local agent also plays a role. While a conveyancer should advise on your legal position, an estate agent with strong local performance can help ensure the day itself runs smoothly, from managing key handover to keeping communication open across the chain. You can read more in our guide to choosing the right estate agent.

What can go wrong on completion day

Most completions go through without major issues, but it is worth knowing what can occasionally cause a hitch.

Funds not arriving in time

Occasionally, the buyer's funds may not reach the seller's solicitor before the banking deadline. If this happens, completion may be pushed to the next working day, which can throw removals and other bookings off track. In most cases the delay is short and resolved quickly, but it can carry costs if removal firms need to be rebooked or storage arranged.

Keys not being released

If the seller's solicitor has not received the funds, they will usually advise the seller not to release the keys. This is a legal protection rather than an obstruction. Where the delay is caused by another party, there can sometimes be a right to compensation, but this depends on the specific circumstances and your solicitor will advise on the best route.

Last-minute problems in the chain

Because a chain relies on every transaction completing in sequence, a problem at one link can ripple through the rest. Staying flexible and keeping communication open with your agent and solicitor helps limit the disruption.

References

• Gov.uk, Stamp Duty Land Tax
• HM Land Registry, Search house prices
• The Law Society, Find a Solicitor