In England and Wales, a home move has two big milestones that often get confused: exchange of contracts and completion. They can happen on the same day, but more often there is a gap between them. Understanding what each step means, what changes legally, and what practical tasks need doing can reduce stress and help you plan everything from removals to finances. It also helps you avoid common pitfalls, like booking a moving van too early or assuming the purchase is guaranteed before it truly is.
Exchange is the point where the buyer and seller become legally bound to go through with the deal on the agreed terms. Completion is when ownership actually transfers and you get the keys. Between those two moments, a lot happens behind the scenes: final checks, mortgage drawdown, confirming figures, and ensuring everyone in the chain is ready.
This article explains exchange and completion in plain terms, with a focus on what typically happens for buyers and sellers. It covers the key terminology, the work that must be done before exchange, what actually happens at exchange, and what you should prepare for between exchange and completion. It also answers common questions that come up when timings change, chains wobble, or you are trying to coordinate a mortgage, a tenancy end date, and a moving day.
Key terms: exchange of contracts and completion
Exchange of contracts is the moment both parties’ signed contracts are formally exchanged by the conveyancers. After exchange, the contract becomes legally binding. That means the buyer is committed to buy and the seller is committed to sell, at the agreed price, on the agreed completion date, with the agreed fixtures and fittings included. If either side fails to complete after exchange without a valid contractual reason, financial penalties and legal consequences can follow.
Completion is the day the purchase money is transferred to the seller’s conveyancer, the transaction is finished, and the buyer can collect the keys. The legal title transfers and the buyer takes responsibility for the property. From that point, the buyer typically needs buildings insurance in place (often it is needed from exchange, depending on the contract), and the seller must vacate by the time agreed.
A few other terms help make sense of the timeline:
The chain is the linked set of purchases and sales, where each transaction depends on another. Chains are common in the West Midlands, especially where a seller needs to buy their next home in Birmingham or nearby before they can move out.
The deposit is usually paid on exchange. It is often 10 percent of the purchase price, but it can sometimes be less by agreement, particularly in longer chains or where the buyer has a high loan-to-value mortgage.
Completion date is set at exchange. Before exchange, any date discussed is only a target and can change.
Vacant possession means the property will be empty of people and the seller’s belongings on completion, unless the contract says otherwise.
Understanding these basics helps you recognise why conveyancers are cautious about exchanging too early and why completion requires careful coordination of money, documents, and timing.
What happens before exchange: searches, enquiries, surveys and mortgage offer
Before exchange, the aim is to ensure you know what you are buying, how you will pay for it, and what legal issues might affect your use or future sale of the property. This stage is where most delays occur, and it is also where most risk reduction happens.
Searches are ordered by the buyer’s conveyancer. The local authority search looks for planning permissions, building regulation approvals, enforcement notices, adoption of roads, and other matters recorded by the council. Local search times can vary, and the results can highlight things like road schemes, restrictions, or missing approvals for alterations. Drainage and water searches confirm whether the property is connected to mains water and sewerage and where public drains run, which matters if you plan extensions. Environmental searches look at issues such as historic land use and potential contamination risk, which can be relevant in areas with an industrial past.
Enquiries are the questions raised with the seller’s conveyancer based on the contract pack, the title documents, and the property information forms. Typical enquiries cover boundaries, disputes, guarantees, rights of way, alterations, and management information for leasehold property. For flats, the process usually takes longer because the management pack, service charge accounts, building insurance details, and planned major works need to be reviewed. In many Birmingham developments, service charge arrangements and managing agent responsiveness can significantly influence timing.
Surveys are separate from conveyancing but closely linked to decision-making. A lender’s valuation is not a detailed check of condition. A homebuyer report or a building survey can reveal damp, roof issues, movement, or poor alterations. If a survey highlights problems, the buyer may renegotiate the price or request repairs, which must be resolved before exchange to avoid regret or disputes later.
A mortgage offer must be issued and checked before exchange if you are borrowing. Your conveyancer will review the conditions, ensure the property is acceptable to the lender, and confirm any special requirements, such as retention for repairs or evidence of building regulation sign-off. Buyers also need to have their deposit funds ready and evidenced, because conveyancers must complete anti-money laundering checks and verify the source of funds. Only when searches, enquiries, survey decisions, and funding are in place does exchange become sensible and safe.
The exchange process: signing, deposit, binding contract and risks
Exchange is where intention becomes obligation. Up to that point, either party can usually pull out with limited legal consequence, even if it feels unfair after weeks of work. After exchange, the contract is binding and the completion date is locked in, so the exchange process is handled carefully.
Signing happens first. The buyer and seller each sign their own part of the contract. These days, signatures may be wet ink or electronic, depending on the documents and the conveyancer’s process. Signing alone does not bind you. The binding moment is when contracts are exchanged, usually by a formal telephone exchange between conveyancers who confirm they hold signed contracts and authority to proceed.
The deposit is normally paid at exchange. The traditional amount is 10 percent, but it is not a fixed rule. In a chain, the buyer’s deposit often comes from the sale proceeds of their current property, so the amount passed up the chain may be less than 10 percent. The contract will state what deposit is paid and what happens if the buyer fails to complete. Buyers should be clear about where the deposit is coming from and whether it will be held as agent or stakeholder, as that affects how it is treated if the transaction collapses after exchange.
Once exchanged, there is a real financial risk if you do not complete. If a buyer fails to complete, they can lose the deposit and may be liable for the seller’s losses, such as additional mortgage interest, legal costs, or a lower resale price. If a seller fails to complete, the buyer can usually claim costs and may seek to force the sale through the courts, although that is complex and slow. Because of these consequences, conveyancers will not exchange until key conditions are satisfied: the mortgage offer is in place, the buyer has buildings insurance arranged if required from exchange, and the completion date is realistic for the chain.
Another important exchange risk is timing assumptions. Booking removals, giving notice on a rental property, arranging time off work, and scheduling utility switches should usually wait until after exchange, because before then the move date can slip without warning. In Birmingham and the wider West Midlands, where chains can involve multiple linked transactions across different neighbourhoods, a single delay with a management pack or a lender can push exchange back. Exchange is the moment you can plan with confidence because the date is fixed and enforceable.
Between exchange and completion: final checks, funds, and practical arrangements
The period between exchange and completion can be as short as the same day or as long as several weeks, depending on what is agreed. This time is not dead space. It is used to line up money, documents, and practical tasks so that completion can happen smoothly.
Your conveyancer will prepare a completion statement showing the balance needed to complete, including the purchase price, stamp duty (if payable), legal fees, search fees, and any apportionments such as ground rent and service charges on leasehold property. The buyer must transfer cleared funds in time, because on completion day there is no slack if your bank transfer is delayed.
The conveyancer also requests the mortgage advance from the lender. Lenders often require a set notice period. If completion is on a Monday, the request usually needs to be made early enough to account for banking timescales. Any last-minute changes to the completion date can create problems if funds have already been requested for a particular day. This is why completion dates are agreed carefully at exchange, especially in chains.
Final legal checks are carried out. The buyer’s conveyancer will perform a Land Registry priority search to freeze the title position for a short period and a bankruptcy search if a mortgage is involved. These checks help ensure there are no new entries against the seller’s title and no issues that would prevent the lender from releasing funds. For leasehold purchases in Birmingham, there may also be requirements to prepare notices to the freeholder or managing agent and to ensure the management company knows where to send future service charge demands.
Practical arrangements matter as much as legal ones. Buyers should arrange buildings insurance from exchange if the contract requires the risk to pass at that point, which is common. Even if you are not moving in immediately, the property may need appropriate cover. Removals should be booked for completion day, with a realistic schedule that accounts for the fact that keys are typically released only after funds arrive and the seller’s conveyancer confirms completion. That can be late morning or afternoon.
Sellers need to arrange their move out, final meter readings, and leaving the property in the agreed condition, including removing rubbish and leaving items included in the fixtures and fittings list. If there is a chain, everyone is aiming to complete on the same day, and delays can ripple. Being organised about funds, paperwork, and access arrangements reduces the chance of a stressful completion day.
FAQs
When do I become legally committed, at exchange or at completion?
You become legally committed at exchange of contracts. Before exchange, either side can usually withdraw without having to complete the transaction, although you may lose money spent on surveys, searches, and legal work. Once contracts are exchanged, the agreement is binding and the completion date is fixed. If you then change your mind or cannot complete, the consequences can be serious, including losing the deposit and paying the other side’s losses. Completion is different: it is the day the transaction is carried out in practice, money changes hands, and you receive the keys. Many people feel emotionally committed earlier, especially after a survey or mortgage offer, but legally the turning point is exchange. This is why you should avoid making irreversible plans, such as ending a tenancy or booking non-refundable removals, until exchange has happened.
How long is it between exchange and completion?
It can be anything from the same day to several weeks, but a common gap is one to two weeks. The right length depends on your circumstances and the chain. A short gap can reduce the time you are in limbo, but it requires that mortgage funds can be drawn down quickly and that you can move at short notice. A longer gap gives more time to organise removals, childcare, and work, and it can help if you are waiting for a landlord notice period or need time to pack. The gap can also be influenced by chain logistics, such as coordinating multiple households and ensuring each lender can release funds in time. The completion date is agreed at exchange, so discuss what is realistic before you commit.
Can exchange and completion happen on the same day?
Yes, it is possible, but it is less common and it carries extra risk. If exchange and completion happen on the same day, you do not have the security of a binding contract until the moment you are trying to complete. If something goes wrong that morning, such as a banking delay, a missing document, or an issue in the chain, you may have removals booked and a property packed up without the certainty that completion will happen. Same-day exchange and completion is more common when there is no chain, when the buyer is a cash purchaser, or when timing is critical. If a mortgage is involved, lenders usually need notice to release funds, which can make same-day completion harder. If you are considering it, plan contingencies carefully and be clear on funds transfer timings.
What happens if completion is delayed after exchange?
If completion does not happen on the agreed date after exchange, the contract sets out what happens next. Typically, the party who is ready to complete can serve a formal notice to complete, which makes time of the essence and may allow interest to be charged for each day of delay. If the buyer is at fault, they may have to pay daily interest on the balance and could ultimately lose the deposit if they still cannot complete. If the seller is at fault, the buyer may claim losses and, in some circumstances, seek to enforce the sale. In a chain, a delay is often caused by funds arriving late from another transaction, so one problem can affect multiple moves. The practical impact can include extra removal costs and temporary accommodation. The best protection is to ensure funding, documents, and move plans are lined up well before completion day.
Do I need buildings insurance from exchange or completion?
Often you need buildings insurance from exchange, not completion, because the contract commonly provides that the property is at the buyer’s risk from exchange. That means if there is damage between exchange and completion, the buyer may still be required to complete and would need insurance to cover the loss. This point is sometimes misunderstood, especially by first-time buyers. Leasehold flats can be different because the building is usually insured by the freeholder or management company and the cost is recovered through the service charge. Even then, you may need contents insurance from completion and you should check what the block policy covers. Always confirm the position before exchange so you can arrange the right cover at the right time and avoid being uninsured during a critical period.
When should I book removals and give notice on my tenancy?
Ideally, book removals only after exchange, because that is when the completion date becomes fixed and enforceable. Before exchange, delays are common and you can end up paying cancellation charges or losing deposits on removal services. Giving notice on a tenancy is trickier because notice periods can be long. Some buyers choose to wait until exchange, but that can mean paying rent and a mortgage at the same time. Others serve notice earlier to avoid overlap, but they accept the risk that the purchase might be delayed and they may need temporary accommodation. Consider how competitive the rental market is and how easily you could extend a tenancy if needed. A cautious approach is to plan for a small overlap if your budget allows, as it reduces pressure on completion day.
Conclusion
Exchange and completion are the two moments that define a property transaction, but they do very different jobs. Exchange is the legal commitment point: once contracts are exchanged, you are bound to complete on the agreed date, and the financial consequences of failing to do so can be significant. Completion is the practical finish line, when the purchase money is transferred, ownership changes hands, and you can collect the keys. Understanding the difference helps you time key decisions properly, especially around surveys, mortgage arrangements, insurance, removals, and notice periods.
Before exchange, the focus is on reducing uncertainty by completing searches, raising and resolving enquiries, confirming your mortgage offer, and making an informed decision based on survey findings. At exchange, the contract becomes binding and the deposit is paid. Between exchange and completion, conveyancers carry out final checks, request mortgage funds, and prepare the statements and documents needed for a smooth transfer, while you arrange the practicalities of moving home.
If you would like to read more guidance on the conveyancing process and what to expect at each stage, you can explore the resources available at https://www.chapterlaw.co.uk/.