Paying the Deposit on a House Purchase

At Towerstone, we provide specialist property accountancy services for homeowners, landlords, and property investors. This article explains the key points you need to understand around this topic.

The deposit is one of the most misunderstood parts of buying a house. I regularly speak to buyers who assume they need to hand over thousands of pounds as soon as their offer is accepted, while others think the deposit is paid on completion. Neither is quite right.

In the UK, the deposit is paid at a very specific point in the buying process and understanding when that happens, how much it is, and where the money actually goes can make the whole process far less stressful.

In this article, I will explain clearly when you pay the deposit for a house, how it works in practice, what happens to the money, and how this differs from the deposit you save for your mortgage. I will also cover common scenarios such as first-time buyers, chains, and what happens if a sale falls through.

What People Mean by “The Deposit”

One reason this topic causes confusion is that people use the word deposit to mean two different things.

There is the mortgage deposit, which is the money you put towards the purchase price from your own funds.

Then there is the exchange deposit, which is the money you pay when contracts are exchanged.

They are related, but they are not the same thing and they are not paid at the same time.

The Mortgage Deposit Comes From Your Savings

The mortgage deposit is the difference between the price of the house and the amount you borrow from the lender.

For example, if you buy a house for £250,000 and your mortgage is £225,000, your mortgage deposit is £25,000.

This money usually comes from savings, a gifted deposit from family, or sometimes other approved sources.

However, you do not hand this money over to the seller when your offer is accepted.

When the Exchange Deposit Is Paid

The point at which you actually pay a deposit during the legal process is exchange of contracts.

Exchange of contracts is the moment the sale becomes legally binding. Before exchange, either party can walk away. After exchange, neither side can back out without serious financial consequences.

The exchange deposit is paid on the day contracts are exchanged, not before.

This is the first time money usually leaves your account as part of the purchase.

How Much Is the Exchange Deposit?

Traditionally, the exchange deposit is 10 percent of the purchase price.

So if you are buying a £250,000 house, the standard exchange deposit would be £25,000.

However, in modern transactions, especially for first-time buyers, the exchange deposit is often less than 10 percent.

If your mortgage deposit is only 5 percent, you usually pay that amount at exchange rather than a full 10 percent.

The key point is that the exchange deposit is usually limited to the amount of money you actually have available.

Do You Always Have to Pay 10 Percent at Exchange?

No.

This is one of the biggest myths.

If you are buying with a 5 percent or 10 percent mortgage deposit, your solicitor will normally negotiate a reduced deposit on exchange that matches your available funds.

Sellers generally accept this, particularly where the buyer is a first-time buyer and the rest of the purchase price is coming from a mortgage.

However, the contract will still usually say that the full 10 percent deposit is due if you later fail to complete. This is a legal protection for the seller.

Where the Deposit Money Goes

When you pay the exchange deposit, the money does not go directly to the seller.

It is paid to your solicitor, who then sends it to the seller’s solicitor.

The seller’s solicitor holds the deposit as stakeholder or agent, depending on the terms of the contract.

The money is held safely and is credited towards the purchase price on completion.

It is not released to the seller to spend at that stage.

What Happens to the Deposit on Completion

On completion day, the deposit you paid at exchange is simply deducted from the total amount you owe.

Using the earlier example of a £250,000 purchase with a £25,000 deposit, on completion the mortgage lender sends the remaining £225,000 to your solicitor.

Your solicitor combines the mortgage funds with your deposit and sends the full £250,000 to the seller’s solicitor.

You do not pay the deposit again.

How This Works in a Property Chain

In a chain, the process is slightly more complex but the principle is the same.

If you are selling a property and buying another at the same time, the deposit from your buyer is often passed up the chain and used as the deposit for your purchase.

This means you may not need to physically provide new deposit funds at exchange, provided the figures line up.

Your solicitor coordinates this and will explain if any additional money is required.

First-Time Buyers and Deposits

First-time buyers often feel the most anxious about deposits.

In most cases, a first-time buyer will not pay any money at all until exchange of contracts.

You may be asked to transfer your deposit funds to your solicitor shortly before exchange so they are ready, but the actual payment happens only when exchange takes place.

Before that point, you will usually only have paid for things like surveys and solicitor search fees.

Do You Pay a Deposit When Making an Offer?

No.

You do not pay a deposit when you make an offer on a house.

An offer is simply an expression of intent. It is not legally binding and no money changes hands.

If anyone asks you to pay a deposit just to make an offer, that is a red flag.

What Happens If the Sale Falls Through Before Exchange

If the sale falls through before exchange of contracts, you do not lose your deposit because you have not paid one yet.

This is why exchange is such an important milestone.

You may still lose money you spent on surveys, searches, or legal work, but your deposit itself is not at risk.

What Happens If the Sale Falls Through After Exchange

If the sale falls through after exchange, the consequences are serious.

If you are the buyer and you fail to complete without a valid legal reason, the seller is usually entitled to keep your deposit.

This is why solicitors are very careful about timing exchange and only proceed once everyone is confident that completion can happen.

Can You Exchange Without Paying a Deposit?

In very rare cases, yes.

This is known as a zero deposit exchange.

It usually only happens where:

Both parties agree

There is a strong chain

The seller is comfortable with the risk

This is uncommon and not something buyers should expect.

How Much Notice Do You Get Before Paying the Deposit?

Your solicitor will usually give you clear notice before exchange.

They will tell you:

The exact amount needed

When it needs to be transferred

Where it should be sent

You are not expected to produce the money instantly. Exchange is usually planned a few days in advance.

Common Mistakes Buyers Make

One common mistake is assuming the deposit is needed much earlier than it actually is and panicking unnecessarily.

Another is confusing the mortgage deposit with the exchange deposit and thinking they are separate payments.

Some buyers also forget that deposit funds must be cleared and accessible. Money tied up in fixed accounts or investments may need time to release.

Practical Timeline Summary

In a typical purchase, the sequence looks like this:

You make an offer and it is accepted with no money paid.
You instruct a solicitor and apply for a mortgage.
You pay for searches and surveys during the process.
Shortly before exchange, you transfer your deposit funds to your solicitor.
On the day of exchange, the deposit is paid.
On completion, the rest of the money is paid and you get the keys.

Final Thoughts

So, when do you pay the deposit for a house?

In the UK, you usually pay the deposit at exchange of contracts, not when you make an offer and not on completion.

For most buyers, especially first-time buyers, this means the deposit is paid relatively late in the process, once everything is in place and the purchase is legally secure.

My advice is always to speak openly with your solicitor early on. They will tell you exactly how much you need, when you need it, and make sure you are not caught off guard. Understanding this one part of the process clearly removes a huge amount of unnecessary stress from buying a home.

You may also find when to instruct a solicitor when buying a house and when to worry about house not selling uk useful. For broader property guidance, visit our property hub.