Mortgages
TL;DR
Most UK lenders require a minimum 5% deposit for a residential mortgage, but the best rates are available from 25% or 40% loan-to-value. Each 5% increase in deposit generally unlocks a lower rate band. A Lifetime ISA adds a 25% government bonus on up to £4,000 per year for first-time buyers. Gifted deposits from family are acceptable to most lenders with documentation confirming the gift is non-repayable.
The deposit is the foundation of any house purchase: it determines how much you need to borrow, which lenders will consider your application, and what mortgage rate you will be offered. For first-time buyers in 2026, the national average house price means a 10% deposit requires saving approximately £28,000 and a 20% deposit approximately £56,000, based on the most recent UK House Price Index from the ONS. These are substantial sums that typically require years of disciplined saving, which is why understanding how deposit size affects mortgage rates and which savings tools accelerate accumulation is important.
The deposit also signals your creditworthiness to lenders: a larger deposit means a lower loan-to-value ratio, which reduces the lender's risk and is rewarded with lower mortgage rates. The difference in monthly payments between a 5% deposit mortgage and a 20% deposit mortgage at current rates can be several hundred pounds per month over a 25-year term. This guide covers minimum deposit requirements, LTV rate bands, savings vehicles, and how gifted deposits work.
Key facts (2026)
- Average UK house price: approximately £281,000 as of Q1 2026 (ONS UK House Price Index). A 10% deposit on the average purchase is approximately £28,100.
- Minimum deposit for most UK residential mortgages: 5% LTV (95% LTV mortgage). Higher-risk applicants may be required to provide 10% or more by individual lenders.
- The Lifetime ISA provides a 25% government bonus on up to £4,000 per year for first-time buyers aged 18-39, usable toward a property purchase under £450,000 (HMRC).
- Most lenders apply risk tiers at 5% deposit intervals: 95%, 90%, 85%, 80%, 75%, 60%, and 40% LTV are typical price points where rates improve materially (FCA MCOB mortgage data).
- Gifted deposits are accepted by most UK lenders provided a signed gift letter from the donor confirms the money is a gift and not a loan, and that the donor has no financial interest in the property (individual lender policy and FCA anti-money-laundering rules).
Minimum deposit requirements by lender type
The vast majority of mainstream UK lenders offer mortgages at 95% loan-to-value, meaning a minimum 5% deposit. The Mortgage Guarantee Scheme, a government initiative, incentivised lenders to offer 95% LTV products by providing a partial government guarantee on the portion of the loan above 80% LTV. As of 2026, several major lenders continue to offer 95% LTV mortgages independently of the scheme. However, 95% LTV products carry the highest mortgage rates in the market and the most stringent affordability and credit requirements. Lenders may require a minimum 10% deposit for new-build properties, properties of non-standard construction, high-rise flats, or applicants with adverse credit. Check lender-specific criteria before assuming 5% is achievable for your specific property type.
How loan-to-value affects mortgage rates
Mortgage rates are tiered by loan-to-value, with the lowest rates available at the lowest LTV bands. The rate improvement for each step down in LTV is not linear; some transitions produce a larger benefit than others. Moving from 95% to 90% LTV typically unlocks a more material rate reduction than moving from 70% to 65% LTV, because the 90% tier carries substantially lower risk for the lender. The key inflection points in 2026 are typically at 90%, 75%, 60%, and 40% LTV. At 60% LTV and below, borrowers access the most competitive fixed rate products; at 40% LTV or below, some lenders offer their lowest available rates. If you are close to a rate band boundary - for example, if your deposit is 9% when 10% would move you into a lower rate tier - it may be worth delaying the purchase to save the additional sum, depending on the rate difference and your savings timeline.
Lifetime ISA and other savings vehicles
The Lifetime ISA is one of the most tax-efficient ways to save for a first home deposit. Contributions of up to £4,000 per year attract a 25% government bonus - up to £1,000 per year - paid monthly by HMRC directly into the account. The LISA must have been open for at least 12 months before use, and the property purchased must be worth no more than £450,000 and be the purchaser's first home. Both buyers in a joint purchase can each use their own LISA toward the same property. Standard cash ISAs and stocks and shares ISAs are also tax-efficient savings vehicles: ISA interest and gains are free of income tax and CGT up to the £20,000 annual allowance in 2025/26. For deposit savings with a timeline of three years or more, the stock market exposure of a stocks and shares ISA has historically provided higher real returns than cash, though with investment risk. Premium Bonds offer tax-free prizes and 100% capital security but no guaranteed return.
Gifted deposits: what lenders require
A gifted deposit is money given to a buyer by a family member (most commonly a parent) to fund all or part of the deposit. Most UK lenders accept gifted deposits, but they require documentation to satisfy anti-money-laundering requirements and to confirm that the funds are a genuine gift and not a loan. Typically required: a signed gift letter from the donor stating the amount, that it is an unconditional gift, that the donor has no financial interest in the property, and that repayment is not expected; evidence of the source of the donor's funds, such as bank statements or savings account statements for the three to six months prior to the gift; and confirmation that the donor is solvent and the gift does not jeopardise their own finances. Some lenders require the donor to be a close family member; others accept gifts from friends and more distant relatives. Check lender-specific policy before the gift is made.
Deposit protection before exchange
Once you have saved your deposit, it is important to keep it in a protected, accessible account until exchange of contracts. After exchange, you typically pay a 10% exchange deposit to the vendor's solicitor; this is held by the solicitor and not protected by the FSCS. Before exchange, ensure your deposit savings are held in an FCA-regulated, FSCS-protected account (up to £85,000 per person per institution). If your deposit exceeds £85,000, split it across accounts at different FSCS-protected institutions. Do not tie your deposit up in investments or fixed-term accounts that may not be accessible within your purchase timeline. Most conveyancing processes complete within three to six months of a mortgage offer; plan your savings accessibility accordingly.
Related guides
- UK mortgage repayment calculator
- UK mortgage affordability calculator
- UK stamp duty calculator 2026
- All Mortgages guides →
Frequently asked questions
Can I use a Help to Buy Equity Loan in 2026?
No. The Help to Buy: Equity Loan scheme for England closed to new applications on 31 October 2022 and no replacement scheme had been announced as of May 2026. The Scottish, Welsh, and Northern Irish governments operated separate versions of Help to Buy which also ended. Alternatives include the Lifetime ISA, the First Homes scheme (discounted first-time buyer homes from developers), and shared ownership. Check the current position at gov.uk as policy may have changed since this guide was published.
What is the minimum deposit for a new-build property?
Many lenders require a minimum of 10% deposit for new-build properties even if they offer 5% LTV products for existing homes. This is because new-build properties can experience a greater drop in value immediately after purchase as the developer premium is removed, increasing the lender's risk at high LTV. Check the lender's specific new-build criteria before making an offer on a new-build property.
How does a Lifetime ISA bonus work toward a deposit?
The LISA bonus is paid by HMRC directly into your LISA account, not to you separately. At the point of property purchase, your conveyancer requests the full LISA balance - your contributions plus all bonuses earned - from the LISA provider, which pays the funds directly to the conveyancer. You cannot withdraw the LISA as cash and then use it for a deposit; the funds must flow through the conveyancing process to qualify as a first-home purchase withdrawal.
Do I need a solicitor's letter for a gifted deposit?
No, but you need a signed gift letter from the donor meeting the lender's requirements. Most lenders provide a template or list of required wording. Your solicitor or conveyancer may also request sight of the gift letter and the donor's source of funds documentation as part of their own anti-money-laundering obligations. Prepare this documentation early, as delays in providing it can hold up the mortgage application and exchange timeline.
Can savings from a stocks and shares ISA be used as a deposit?
Yes. The origin of deposit funds does not restrict which type of savings vehicle they came from, provided the source of funds can be documented. If selling stocks and shares ISA investments, ensure the settlement and transfer timeline aligns with your exchange of contracts date, as investment proceeds can take several working days to settle and transfer to a bank account. Also note that investments may fall in value; do not rely on an assumed value for deposit savings held in volatile assets.
How we verified this guide
All deposit requirements and LISA rules were verified against HMRC LISA guidance, ONS UK House Price Index Q1 2026, FCA MCOB mortgage data, and FSCS deposit protection rules during May 2026. We do not accept payment from lenders and do not earn commission on mortgage or savings referrals.
Primary sources
- HMRC - Lifetime ISA rules and eligibility
- ONS - UK House Price Index
- FSCS - Deposit protection limits
- MoneyHelper - Saving for a mortgage deposit
Last reviewed: May 2026.