Mortgage Deposit guide (2026): How much you need, how to save & get better rates

What is a mortgage deposit?

A mortgage deposit is the upfront payment you make when buying a property. The remaining amount is covered by your mortgage. Your deposit forms your initial equity in the property. A larger deposit reduces the amount you need to borrow and lowers the lender’s risk.

This risk is important because it affects your approval odds, the interest rate you’re offered, and the total cost of your mortgage. A mortgage is essentially a shared investment. You provide the deposit, and the lender finances the remainder. A higher deposit increases the lender’s confidence in the transaction.

How much deposit do you need for a mortgage?

In most cases, buyers need between 5% and 20% of the property value.

• £300,000 property
• 5% deposit → £15,000
• 10% deposit → £30,000
• 20% deposit → £60,000

Although 5% is often presented as the minimum, it is more accurately considered the entry point rather than the standard.

A larger deposit reduces the amount you need to borrow and strengthens your position with lenders. This can result in better rates, lower monthly payments, and greater flexibility when selecting mortgage products.

The key consideration is not only how much you need, but how much will place you in a stronger financial position.

Minimum vs ideal deposit — what should you aim for?

5% deposit (95% LTV)
This is the lowest standard entry point into the market.

This option prioritises speed, allowing earlier entry into the market in exchange for higher long-term costs.

10–15% deposit
At this level, affordability and cost begin to balance.

For many buyers, this is the most realistic target and can often be achieved without significantly delaying the purchase.

20%+ deposit
At this level, mortgage terms improve significantly.

At this stage, the focus shifts from getting approved to optimising the mortgage.

What is Loan-to-Value (LTV) and why does it matter?

Loan-to-Value (LTV) measures the amount borrowed as a percentage of the property’s value. LTV = (Loan / Property Value) * 100

• Example:
  • Property: £200,000
  • Deposit: £40,000
  • Loan: £160,000
  • LTV = 80%

LTV is a key factor in mortgage lending because it directly indicates the level of risk.

• A lower LTV means lower risk and typically results in better interest rates.
• A higher LTV indicates greater risk and usually results in more expensive borrowing.

Lenders use LTV to determine your mortgage terms. Even a small change, such as moving from 90% to 85%, can provide access to better rates. In practice, your deposit is not only a requirement; it also influences the long-term cost of your mortgage.

What can you use as a mortgage deposit?

Lenders assess both the size and origin of your deposit. Funds must be legitimate, traceable, and must not increase your financial risk profile. Your deposit should come from stable, well-documented sources. Any indication of hidden debt or temporary funding may raise concerns during underwriting.

Savings

Savings are the most straightforward and preferred deposit source.

Lenders prefer a consistent savings pattern over time rather than a lump-sum payment. Regular contributions demonstrate financial discipline and help verify the origin of funds. You may need to provide several months of bank statements to confirm the funds are not from undisclosed borrowing.
For lenders, savings indicate stability and suggest you are likely to maintain payments over the long term.

Gifted deposit

Gifted deposits are common, especially for first-time buyers, but require strict documentation.
Lenders need formal confirmation that:

• The money is a genuine gift
• It will not be repaid
• The person giving the money has no legal claim to the property

This is important because any expectation of repayment converts the gift into a hidden loan, which can affect your affordability profile. Some lenders also verify the source of gifted funds, such as a parent’s savings, especially for anti-money laundering checks.

Sale of another property

If you already own property, your deposit often comes from equity released after a sale. It is clearly documented, easy to verify, and directly tied to an existing asset. This equity often determines how competitive your next mortgage will be, especially if it significantly reduces your loan-to-value ratio.

Inheritance

Inheritance is generally accepted if you can provide evidence of the source of funds. This may include legal documents, executor statements, or proof of transfer. As with all deposit sources, transparency is essential. From a risk perspective, lenders treat inheritance similarly to savings, provided the documentation is clear.

What you cannot use

Using borrowed money as a deposit is a common reason for mortgage rejection

• Credit cards
• Informal loans from friends

The issue is not only policy but also risk. A deposit should reduce the lender’s exposure, which is not the case if it is funded by debt. Lenders often detect this through credit checks and bank statement analysis, even if it is not immediately obvious. Any inconsistencies can delay or derail your application.

Government schemes to help with a deposit

For many buyers, the deposit is the biggest barrier — not affordability. To address this, several government-backed schemes are designed to accelerate savings or reduce the upfront requirement.

Lifetime ISA (LISA)

A Lifetime ISA helps you save for your first home by providing a government bonus. You can contribute up to £4,000 per year, and the government adds a 25% bonus, up to £1,000 annually.

Over time, these contributions add up. For example, saving £4,000 per year for five years results in £20,000 of your own savings plus £5,000 in bonuses.

The main advantage is leverage: you can increase your deposit without increasing your income.

Help to Buy (legacy schemes)

Help to Buy schemes have been phased out in many areas, but similar options may still be available in your region or through recent policy changes. Historically, these schemes allowed buyers to purchase with a smaller deposit by combining a mortgage with a government equity loan.

Although availability is now limited, the broader concept remains relevant: reducing upfront capital in exchange for shared ownership or future obligations.

Shared Ownership

Shared Ownership allows you to purchase a percentage of a property, such as 25 to 75 percent, and pay rent on the remaining share. Since you are only purchasing part of the property, your deposit requirement is lower.

However, this option involves trade-offs:

• Ongoing rent payments
• Restrictions on selling
• Additional fees

Can you get a mortgage with no deposit?

In most cases, no. Lenders generally require you to contribute some capital upfront. That said, there are a few exceptions.

How your deposit affects your mortgage rate

Your deposit not only affects approval but also directly influences your mortgage rate. Lenders assess risk, and deposit size is a key indicator. A smaller deposit increases the lender’s exposure, resulting in a higher interest rate. A larger deposit lowers this risk and reduces your rate.

Loan-to-Value (LTV) is important here. As your deposit increases and LTV decreases, you qualify for better pricing bands. These thresholds, such as 95%, 90%, 85%, and 80%, are not linear; moving past one can significantly improve your offer.

Even a 5-10% increase in your deposit can significantly reduce your costs. This is not due to borrowing much less, but because you access a lower rate for the entire loan.

How a bigger deposit can save you money

A larger deposit benefits your mortgage in several important ways:

• Lower loan amount: You borrow less, which reduces your monthly payments.
• Better interest rates: A lower loan-to-value ratio gives you access to more competitive mortgage deals.
• Less total interest: Savings accumulate significantly over the life of a 20 to 30 year mortgage.
• Stronger remortgaging position: You will have more options available in the future.
• Lower financial risk → more buffer if property values fall.

Importantly, these benefits are cumulative rather than isolated. Increasing your deposit does more than slightly improve your situation. It fundamentally changes the long-term cost structure of your mortgage.

How to save for a mortgage deposit

Saving for a deposit relies more on having a clear structure than on discipline alone.

Begin by setting a clear savings target based on the property price and required deposit. Next, divide this goal into manageable monthly amounts:

• £10,000 → ~£278/month over 3 years
• £10,000 → ~£167/month over 5 years

Consistency is essential. Set up a dedicated savings account and automate contributions to ensure regular progress.

Progress typically comes from both managing expenses and increasing income. In most cases, growing your income accelerates savings more effectively than reducing costs alone.

How long does it take to save a deposit?

There is no set timeline; it depends on your income, savings rate, and target deposit. In broad terms:

• A 5% deposit typically takes approximately 1 to 3 years to save.
• A 10-15% deposit usually takes about 2 to 5 years.
• 20%+ → ~4–7+ years

These ranges serve as a general guideline. Your actual timeline will depend on how much you can save each month. Two individuals with the same deposit goal may reach it at different times, depending on their monthly savings and income growth. Ultimately, your strategy has a greater impact than market conditions.

Common mistakes when saving for a deposit

Most problems arise not from income, but from avoidable decisions

Using borrowed money as a deposit

This is one of the quickest ways to be declined. A deposit funded by debt increases risk rather than reducing it, and lenders will notice.

Ignoring additional costs

Focusing only on the deposit is a common mistake. Stamp duty, legal fees, surveys, and moving costs can easily exceed your budget if not planned for.

Aiming for the absolute minimum

A 5% deposit may secure a property, but it often results in higher rates and fewer options. What seems like a shortcut can become costly over time.

Delaying affordability checks

Many buyers check their borrowing capacity only at the end. In reality, this should be the starting point, as it defines your target and saves months of uncertainty.

The pattern is clear: most mistakes occur when the deposit is viewed as just a number, rather than as part of a broader financial plan.

Deposit requirements for buy-to-let mortgages

Deposits for buy-to-let mortgages are generally higher than those required for residential properties. Most lenders require a minimum deposit of 20 to 25 percent, based on their risk assessment.

• A higher minimum deposit, typically 20 to 25 percent or more, is standard for most lenders.
• Stricter affordability checks → rental income must comfortably cover mortgage payments.
• There is greater risk exposure due to potential void periods, tenant turnover, and market fluctuations.
• Lending criteria are more conservative, resulting in fewer high loan-to-value options.

In practice, the deposit is not only a barrier to entry but also a crucial factor in ensuring the investment is viable.

Frequently Asked Questions

What is the minimum deposit for a mortgage?

In most cases, the minimum deposit is 5% of the property value. However, options at this level are limited and usually have higher interest rates.

Is a 5% deposit enough?

Yes, but it is not always ideal. While a 5% deposit lets you enter the market sooner, it often leads to higher costs and fewer mortgage choices.

Can I use a gifted deposit?

Yes. Many lenders accept gifted deposits from family members if you can provide documentation that the funds are a non-repayable gift.

Can I get a mortgage with no deposit?

In rare cases, yes. This is possible through 100% or guarantor mortgages, though these options are limited and carry higher risk.

How long does it take to save a deposit?

Typically, it takes between 2 and 5 years, depending on your income, savings rate, and target deposit amount.