How to save for a mortgage deposit in the UK

Saving for a mortgage deposit starts with a realistic cash target. Residential mortgages can sometimes start with a deposit of around 5% to 10%, but the amount a lender requires and the rate offered depend on the deal, the property, your circumstances and affordability checks. A larger deposit may improve the available terms, but it does not guarantee approval. Buy-to-let lending has separate, lender-specific deposit, property and rental-income criteria.

Treat the deposit as one part of the moving budget, not the entire goal. A practical plan is to:

• choose a target property price and calculate the deposit you want to build;
• set aside separate money for legal, survey, moving and any purchase-tax costs, which vary by UK nation and personal circumstances;
• keep an accessible emergency reserve rather than committing all cash to the purchase;
• decide on an affordable monthly saving amount, arrange a regular transfer and review the plan as your circumstances or target change.

Lifetime ISA

A Lifetime ISA account can be useful for some first-time buyers saving over a longer period. You can open one when you are aged 18 to 39, provided you meet the residence rules (with limited specified exceptions); your first payment must be made before you turn 40. You can choose a cash LISA or an investment LISA. Contributions and government bonuses stop at age 50.

You can contribute up to £4,000 in each tax year, within the overall ISA allowance. The government bonus is 25% of what you contribute, up to £1,000 in a tax year, and is paid monthly. For example, £4,000 of contributions could receive a £1,000 bonus before any growth or fees. The amount available depends on what you contribute, the tax years involved and a qualifying use.

For a qualifying first-home purchase, the home must be in the UK, cost no more than £450,000 in total, be intended as your main residence and be bought with an eligible mortgage. At least 12 months must have passed since your first LISA payment. A first-time buyer is someone who has never owned a home anywhere in the world. Your LISA manager pays the withdrawal directly to your conveyancer; you cannot withdraw it yourself for the purchase.

If two people are buying together, each person can use a LISA only if they separately meet the rules. An eligible LISA holder can buy with someone who has previously owned a home. Ask your conveyancer and LISA manager about the process early, and see HMRC’s Lifetime ISA withdrawal guidance for the rules on failed purchases and other exceptions.

A LISA is not a substitute for emergency cash. Withdrawals that do not meet an exception normally face a 25% charge on the amount withdrawn, including the bonus. That can mean receiving back less than you put in: ignoring growth and fees, withdrawing £5,000 made up of £4,000 contributions and a £1,000 bonus would incur a £1,250 charge, leaving £3,750. The main exceptions include a qualifying first-home purchase, reaching age 60 and terminal illness with less than 12 months to live.

For more detail, see our guide to the Lifetime ISA.

Financial markets

Investing can suit money you will not need for a long time, but it is usually a poor match for a deposit needed in the near term. Investment values can fall and there is no guarantee that markets will recover when you need to exchange contracts. The FCA generally treats investing as a longer-term activity, often at least five years, and losses remain possible. If your purchase timetable is close, focus on keeping the deposit accessible rather than relying on a market recovery.

Savings accounts

Savings accounts and bank deposits are ways of holding cash, rather than a separate investment shortcut. The right option depends on when you may need the money and how much flexibility you need. Common UK choices include:

• Easy-access accounts, which can allow withdrawals without a notice period, subject to the provider’s terms.
• Regular saver accounts, which may set limits on monthly contributions or withdrawals.
• Notice accounts, where you give notice before taking money out.
• Fixed-term accounts, where access before the end of the term may be restricted or carry a penalty.
• Cash ISAs, where interest is normally tax-free; they are different from Lifetime ISAs and have their own rules.

Rates can be variable or fixed, and variable rates can change. Check the product terms for access, withdrawal penalties, contribution limits and how long a rate applies before moving money. Interest on non-ISA savings depends on your income and available allowances. For example, the Personal Savings Allowance is currently £1,000 for basic-rate taxpayers, £500 for higher-rate taxpayers and nil for additional-rate taxpayers; other allowances may also apply.

Eligible deposits with UK-authorised banks, building societies and credit unions have FSCS protection up to £120,000 per eligible person, per authorised institution. It is not a per-account limit: balances with brands that share a banking licence count together. FSCS protection does not remove the need to check the provider and account terms, and it does not cover investment losses.

Is it worth saving money in the form of physical cash?

Cash at home may be immediately available, but it can be lost or stolen and does not earn interest. Inflation can also exceed the interest available on savings, so no account automatically protects spending power.

Keeping a clear trail for your deposit matters too. Lender and conveyancer requirements differ, so ask about them early and retain records that trace how savings built up, including relevant income or gift evidence. Paying cash into an account does not by itself prove the source of funds or mean that it will be accepted.

Summary

Build a plan around the amount you can save regularly while keeping separate money for buying costs and emergencies. A cash LISA may help an eligible first-time buyer who can meet its conditions and leave the money in place; accessible cash savings can be more suitable for money needed soon. Compare account terms as well as rates, keep deposit records organised and avoid putting a near-term purchase at risk through investments that can fall in value.