A house deposit is, for most people, the largest single sum they'll have saved up to that point in their lives. That changes how you should hold the money — the priorities shift from chasing growth to protecting what you've built and keeping it available for completion day.
Protecting the money matters more than growing it
Once you're within a few years of buying, the deposit shouldn't be exposed to investments that could fall in value right when you need it. A market dip the month before you complete could cost you the home. For short timeframes, stability beats potential growth — which usually means cash savings, not investments. Our guide on saving vs investing explains the timeframe logic.
Use the right accounts
A Lifetime ISA can be powerful for a first home because of the government bonus, within its rules and property price cap — see our LISA guide. Beyond that, easy-access and fixed-term savings each have a role depending on how soon you'll buy; our savings account types guide covers the trade-offs.
Budget for more than just the deposit
The deposit is the headline number, but completion involves other costs: legal fees, a survey, mortgage arrangement fees, removals, and potentially Stamp Duty depending on the price and your circumstances (first-time buyers often get relief — check the current rules). Building these into your savings target avoids an unwelcome surprise near the finish line.
The deposit size affects your mortgage
A larger deposit means a lower loan-to-value ratio, which typically unlocks better mortgage rates. That's why pushing a deposit from, say, 10% to 15% can be worth more than the extra saving alone suggests — it can reduce the interest rate on the entire mortgage. Our mortgage calculator lets you see how deposit size changes the monthly cost.