Photo by Viktor Forgacs on Unsplash
Saving for a house deposit in the UK right now feels like trying to fill a bath with the plug half out. You put money away, then rent goes up, or the car needs a new clutch, or house prices in your area creep up faster than your savings do. It’s not your imagination — deposits have genuinely got harder to save for relative to wages, and nobody explains clearly how much you actually need or where that money should sit while you’re saving it.
This isn’t a “cut out your morning coffee” article. It’s a practical walkthrough: how much deposit you actually need, where to keep the money so it grows instead of sitting idle, what schemes exist to help, and how to build a saving habit that survives real life. By the end, you’ll know exactly what to do this week to get moving.
How much deposit do you actually need?
Most lenders want a minimum of 5% of the property price, but the deal gets meaningfully better at 10%, and better again at 15–25%. That’s because mortgage lenders price risk based on loan-to-value (LTV) — the size of your mortgage compared to the property’s value. A smaller deposit means a bigger loan relative to the property, which the lender sees as riskier, so you pay a higher interest rate.
Here’s roughly what that looks like on a £250,000 property:
| Deposit size | Deposit amount | Mortgage needed | Typical rate situation |
|---|---|---|---|
| 5% | £12,500 | £237,500 | Highest rates, fewest lender options |
| 10% | £25,000 | £225,000 | Noticeably better rates available |
| 15% | £37,500 | £212,500 | Wider choice, more competitive deals |
| 20%+ | £50,000+ | £200,000 or less | Best rates, most lender choice |
You don’t need 20% to buy. Plenty of people buy with 5–10%. But knowing that bigger deposits unlock better rates helps you decide whether it’s worth saving a bit longer versus buying sooner.
Where to actually keep the money
This is the part most guides skip, and it matters more than people think. Cash sitting in a current account earning nothing is losing real value to inflation every month. Where you park your deposit savings should depend on your timeline.
If you’re saving for a deposit over the next 1–5 years, a cash savings account or a Lifetime ISA (more on that below) makes sense. You want the money accessible and protected from market dips, because you can’t afford a stock market wobble the month before you need the cash for a mortgage offer.
If your house purchase is genuinely 5+ years away, some people consider a stocks and shares ISA for part of the savings, accepting more risk for potentially higher growth. This isn’t right for everyone — if the market dips the year you want to buy, you could be worse off than if you’d kept it in cash. It’s a judgement call based on your own risk tolerance and timeline, not a one-size-fits-all answer.
Either way, use an ISA (Individual Savings Account) wrapper where you can — it shields your interest or investment growth from tax, and for most people saving a deposit, that’s free money you shouldn’t leave on the table.
The Lifetime ISA: the scheme most people miss
The Lifetime ISA (LISA) is arguably the single best tool for UK first-time buyers, and a lot of people haven’t heard of it or assume it’s not for them.
Here’s how it works: you can pay in up to £4,000 a year, and the government adds a 25% bonus on top — so £4,000 becomes £5,000. That’s free money, guaranteed, no investment risk required if you use the cash version.
The catches: you must be 18–39 to open one, the property must cost £450,000 or less, and you need to have held the account for at least 12 months before using it to buy. If you withdraw the money for anything other than a first home or retirement, you lose the bonus and pay a penalty on top — so don’t use it as a general savings account.
If you’re a first-time buyer under 40, this is worth checking out before anything else. Full details are on gov.uk’s Lifetime ISA page.
A common misconception: “I need to save the whole deposit before I think about mortgages”
A lot of people wait until they have the full deposit saved before they even look at what mortgage they could get. That’s backwards. Speaking to a mortgage broker or using a lender’s affordability calculator early — even a year or two before you’re ready to buy — tells you what you’re actually working towards, not a guess.
Lenders assess affordability based on your income, outgoings, and credit history, not just your deposit size. Two people with the same deposit can be offered very different mortgage amounts. Finding this out early means you’re saving toward a realistic target, not an arbitrary number, and you can spot problems (like a credit file issue) with enough time to fix them before you apply.
Making the saving habit actually stick
Knowing you need to save £20,000 is one thing. Doing it month after month without giving up is another. A few things that make a real difference:
- Automate it. Set up a standing order that moves money into your deposit savings the day you’re paid, before you see it in your current account. Saving what’s “left over” at the end of the month rarely works because there’s rarely anything left over.
- Separate the account entirely. Keep deposit savings somewhere you can’t easily tap for everyday spending — a different bank, ideally one without an instant-transfer app you check daily.
- Track progress visibly. A simple spreadsheet or even a paper chart showing the total creeping up keeps motivation alive far better than an abstract target.
- Review your biggest fixed costs, not your coffee. Subscriptions, insurance renewals, and phone contracts usually have far more slack in them than daily spending habits. A 20-minute insurance comparison can free up more monthly cash than a month of skipped lattes.
Don’t ignore the costs beyond the deposit
A mistake that catches people out: saving exactly the deposit amount and nothing more. Buying a house comes with extra costs that land all at once — solicitor’s fees, a survey, Stamp Duty (if applicable, depending on the property price and whether you’re a first-time buyer), removal costs, and often immediate costs once you move in, like furniture or repairs.
As a rough guide, budget an extra 1.5–3% of the property price on top of your deposit for these costs. On a £250,000 property, that’s roughly £4,000–£7,500 you’ll want sitting separately from your deposit fund, not counted as part of it.
Help to Buy and other schemes — what’s still actually available
Help to Buy equity loans closed to new applicants in England some years ago, so if you see older articles mentioning it, treat that information as outdated. What’s genuinely still available in 2026 includes:
- Lifetime ISA (covered above) — live and available now.
- Shared ownership — you buy a percentage of a property (often 25–75%) and pay rent on the rest, with the option to buy more later. This lowers the deposit and mortgage you need upfront, though you’ll want to understand the rent and service charge terms carefully.
- Mortgage guarantee schemes — government-backed schemes that encourage lenders to offer 95% mortgages. Availability changes, so check current lender offerings rather than relying on what was available a couple of years ago.
For the most current, accurate picture of what’s live, MoneyHelper’s first-time buyer guidance is a reliable, regularly updated source.
The bottom line
- Open a Lifetime ISA this week if you’re an eligible first-time buyer — the 25% government bonus is the highest guaranteed return you’ll find anywhere for deposit savings.
- Set up an automated transfer into a separate deposit account the day you get paid, not at the end of the month.
- Talk to a mortgage broker or use an online affordability calculator now, even if you’re a year or two from buying, so you’re saving toward a real number.
- Budget separately for buying costs (roughly 1.5–3% of the property price) so your deposit fund doesn’t quietly get eaten by solicitor’s fees and surveys.
- Match your savings vehicle to your timeline — cash or a cash LISA for anything under five years, and only consider investment risk if your purchase is genuinely further out.
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