The average UK house deposit is around £53,000 — a significant amount that takes years to save without a strategy. But with the right combination of high-interest accounts, government bonuses, and disciplined saving, you can reach your target significantly faster.
How Much Do You Actually Need?
A 10% deposit is the minimum for most high-street mortgages in 2026. On a £250,000 property that's £25,000. A 15-20% deposit gives access to significantly better mortgage rates — often 0.5-1% lower — which can save tens of thousands over the mortgage term. If your parents can help (Bank of Mum and Dad or guarantor mortgage), you may access 95% LTV products with just a 5% deposit.
- •5% deposit: 95% LTV mortgages available, highest rates
- •10% deposit: much wider mortgage choice
- •15-20% deposit: best rates unlocked
- •Every 5% extra deposit typically improves your mortgage rate
- •Target 10% minimum, 15% if achievable within your timeframe
Best Accounts for Saving a Deposit
Your deposit savings should be working hard in high-interest accounts while you save. In 2026, cash ISAs are paying up to 4.5%, regular savers up to 7%, and easy-access accounts up to 5%. The Lifetime ISA (LISA) is specifically designed for first-time buyers and adds a 25% government bonus.
- •Lifetime ISA: 25% government bonus on up to £4,000/year = £1,000 free/year
- •Cash ISA: up to 4.5% tax-free, flexible versions allow withdrawals
- •Regular Saver: up to 7% on monthly amounts (usually £50-£300/month)
- •Easy-access savings: up to 5%, use for emergency fund portion
- •Fixed-rate bonds: higher rates, but lock money away for 1-5 years
Should I use a LISA for a house deposit?+
Yes, if you're 18-39, haven't owned a property before, and are buying under £450,000. The 25% bonus is genuinely free money. The penalty for non-qualifying withdrawals (25% on the whole amount) means you must be committed to using it for a first home.
Creating a Realistic Savings Timeline
Work backwards from your target. If you need £30,000 and can save £700/month, you're looking at about 40 months (over 3 years). Factor in LISA bonuses (up to £1,000/year) and savings interest (around 4-5%) — these can shorten your timeline by 6-12 months on a £30,000 target.
- •Calculate: target ÷ monthly savings = rough months to target
- •Add LISA bonus: up to £1,000/year reduces timeline
- •Add savings interest: 4-5% on growing pot
- •Build a specific target date — makes saving feel purposeful
- •Review and adjust every 6 months
Increasing Your Savings Rate
The fastest lever is increasing your monthly savings contribution. Every extra £100/month saved shortens your timeline significantly. Consider moving to a cheaper rental during your saving period, eliminating non-essential subscriptions, taking on additional income, or receiving a pay rise specifically earmarked for the deposit pot.
- •Automate savings on payday — don't leave it to willpower
- •Review subscriptions and cancel non-essentials
- •Any windfall (tax refund, bonus) goes to deposit pot
- •Even moving from 60% to 70% savings rate shortens timeline substantially
- •Consider house-sharing to save on rent while saving for deposit
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