HomeBuyingCosts Guide
How Much Deposit Do I Need UK 2026/27? | Min 5%
Updated: 2026-05-26 · 6 min read · Written and reviewed by James Whitfield · Editorial standards · Methodology
A 5% deposit gets you a mortgage, but a 10% or 15% deposit cuts your monthly payments substantially. This guide covers minimum deposits, the Lifetime ISA bonus, and how long it realistically takes to save at different property prices.
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In brief
- 5% minimum deposit (95% LTV) gets you a mortgage, but 10–15% unlocks meaningfully better rates.
- Lifetime ISA pays a 25% bonus up to £1,000 per year on contributions — only usable on properties up to £450,000.
- Help to Buy ISA bonus must be used by 1 December 2030; maximum £3,000 bonus, claimed at completion.
- A realistic UK savings timeline for a 10% deposit is 2–3.5 years at typical savings rates.
The minimum deposit to get a mortgage in the UK is 5% of the purchase price — a 95% loan-to-value (LTV) deal. On a £300,000 property that means £15,000 down. The maximum you can borrow is limited by both the LTV cap and the lender's affordability assessment, so deposit size and mortgage size are closely linked decisions.
Most buyers spend months or years saving for a deposit, so getting the target figure right matters. Saving 10% or 15% instead of 5% is not just a preference — it typically unlocks lower mortgage rates and meaningfully smaller monthly payments, which compounds over the life of the loan.
Worked examples — home mover typical fees
| Price | England/NI tax | Scotland tax | Wales tax |
|---|---|---|---|
| £300,000 | £5,000 | £4,600 | £4,500 |
| £500,000 | £15,000 | £23,350 | £18,000 |
| £750,000 | £27,500 | £48,350 | £36,750 |
Minimum deposits and what lenders actually require
95% LTV mortgages are available but they are the most restrictive tier. Lenders offering them typically apply tighter affordability checks, charge higher rates, and restrict them to specific property types — many exclude new builds, high-rise flats and non-standard construction outright. On a £250,000 purchase, a 5% deposit is £12,500 and you would borrow £237,500.
The more useful tiers for planning are 10% (£25,000 on a £250,000 purchase) and 15% (£37,500). These unlock a meaningfully wider product range and lower rates from most high street lenders. Rates at 85% LTV are typically 0.3–0.8 percentage points lower than at 95% LTV, which sounds modest but translates to hundreds of pounds per year on a typical mortgage.
Lenders also require the deposit to be 'clean' — most will want to see it in your account for at least three months. Gifted deposits are accepted by most lenders but require a gifted deposit letter confirming the money is not a loan. Shared ownership schemes have their own deposit rules, and Help to Buy Scotland operates differently again.
Why a larger deposit makes mathematical sense
The rate differential between LTV tiers is where the saving actually lives. Consider a £300,000 purchase. At 95% LTV (5% deposit, £285,000 mortgage), a two-year fix might cost 5.4%. At 90% LTV (10% deposit, £270,000 mortgage), the same lender might offer 4.8%. The monthly payment difference on a 25-year repayment mortgage: approximately £85 per month, or £1,020 per year. Over a two-year fix that is £2,040 in saved interest payments.
Saving for a few more months to hit the next LTV tier often pays back in mortgage interest within the first year of the product. This is before accounting for the lower total interest over the life of the loan if you maintain a lower LTV through subsequent remortgages.
The flip side is opportunity cost and rental outgoings. If saving an extra £15,000 takes another year in rented accommodation, the rent paid during that year needs to be weighed against the interest saving. In many cases the calculation favours buying sooner at a higher LTV, especially where rents are high relative to mortgage payments.
Help to Buy ISA and Lifetime ISA — the bonuses
The Lifetime ISA (LISA) pays a 25% government bonus on contributions up to £4,000 per year, giving a maximum annual bonus of £1,000. You can contribute from age 18 up to 50, but can only open one before age 40. To use the LISA for a property purchase, the property must cost £450,000 or less and it must be your first home. Withdrawing for any other purpose before age 60 incurs a 25% penalty charge, which effectively means you lose your own money as well as the bonus.
The Help to Buy ISA stopped accepting new accounts in November 2019 and the deadline to use the bonus on a property purchase is 1 December 2030. If you still hold one, the government adds a 25% bonus on the closing balance when you buy, subject to a maximum bonus of £3,000. The minimum purchase price for the bonus is £1 and the maximum eligible property price is £250,000 outside London (£450,000 in London). The bonus is paid at completion, not exchange — your solicitor claims it on your behalf.
You can hold both a Help to Buy ISA and a Lifetime ISA simultaneously, but you can only use the government bonus from one of them on the same purchase. Most buyers with both accounts use the LISA bonus (maximum £1,000 per year vs maximum £3,000 total from Help to Buy ISA) if they are still actively saving.
How long does it take to save — worked examples
At the UK average first-time buyer price of around £230,000, a 10% deposit is £23,000. Saving £800 per month gets you there in just under two and a half years. Add the LISA bonus (£1,000 per year for two years) and you reach the target about three months sooner. Saving £1,200 per month cuts the timeline to under two years.
At £350,000 (a more typical budget in southern England), a 10% deposit is £35,000. At £800 per month that takes 3.5 years without any bonus. With a LISA maxed out for three years (£3,000 in bonuses), the effective timeline drops to around three years. At £1,500 per month saving, the same target takes just over two years.
The LISA's greatest impact is proportional when the property price is lower — a £1,000 bonus on a £23,000 target is more meaningful than on a £35,000 target. Buyers targeting properties above £450,000 cannot use the LISA for the purchase, though they can still save into a standard ISA and claim back LISA contributions if the product is not used for a house.
Decision framework used by careful buyers
Start with an offer ceiling based on total cash, not headline house price. In practice, buyers who only track deposit and mortgage payments can miss the transaction-cost layer, which is exactly where completions become stressful.
Use a three-pass approach: first estimate tax by nation and buyer type, then add realistic fees, then pressure-test the result by increasing the offer by £10,000 and £25,000. This shows how sensitive your budget is before bidding.
Treat the model as a planning instrument. Final legal liability always sits with official calculators and your conveyancer’s completion statement, but early visibility reduces avoidable surprises.
Practical checklist before making an offer
Confirm your likely buyer status first (home mover, first-time buyer, or additional property). Switching status can alter tax materially at the same price point, so this should be fixed before negotiating.
Collect at least two conveyancing quotes and check what is included. Buyers often compare legal fees without checking disbursements, search packages, leasehold supplements or transfer fees.
Keep a contingency buffer instead of budgeting to the exact minimum. A modest reserve can protect timelines when valuation, legal or lender admin costs move late in the process.
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Frequently asked questions
What is the minimum deposit for a first-time buyer?+
5% of the purchase price, which gives a 95% LTV mortgage. On a £250,000 property that is £12,500. However, a 10% or 15% deposit unlocks better mortgage rates and a wider product choice.
Can I use a Lifetime ISA for any property?+
Only for a first home costing £450,000 or less. Withdrawing for any other reason before age 60 incurs a 25% penalty, which claws back the bonus and a portion of your own contributions.
What is the Help to Buy ISA deadline?+
You must use the bonus by 1 December 2030. New accounts closed in 2019. If you hold one, the maximum bonus is £3,000 and your solicitor claims it at completion.
Does a larger deposit reduce my monthly mortgage payment?+
Yes, in two ways: you borrow less, and you usually access a lower interest rate. Moving from 95% LTV to 90% LTV on a £300,000 purchase can save over £1,000 in interest in the first two years alone.
Can a gift count as a deposit?+
Yes. Most lenders accept gifted deposits from close family, provided the donor signs a gifted deposit letter confirming the money is not a loan and they have no claim over the property.
References
- GOV.UK: Stamp Duty Land Tax — Primary SDLT rates and process guidance.
- Revenue Scotland: LBTT — Official LBTT rates and ADS information.
- Welsh Revenue Authority: LTT — Official LTT rates and higher-rate guidance.
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