The deposit is the single biggest hurdle between renting and owning — and the part of buying you have the most control over. You need a minimum of 5% of the property price, but the smarter target for most first-time buyers is 10%, because it crosses into a better interest-rate tier. This guide is the practical playbook: how much you really need, how the deposit size changes your mortgage, realistic monthly saving targets, how long it takes, and the Lifetime ISA's 25% government bonus that most buyers should use. It's about how to build the money — once you've saved it, our £20,000 deposit guide shows what a saved sum actually buys.
At a glance
The minimum deposit is 5% of the price (about £12,150 on a typical £243,000 first home), but 10% (~£24,300) unlocks meaningfully better rates. Saving £400 a month reaches 10% in roughly five years — faster with a Lifetime ISA, which adds a 25% government bonus on up to £4,000 a year. Aim for the next loan-to-value threshold, not an arbitrary round number.
Contents
How much deposit do you need?
Forget the old idea that you need 20%. In 2026 the realistic minimum is 5% of the purchase price, which gives you a 95% loan-to-value (LTV) mortgage. These are widely available, helped by the Freedom to Buy (mortgage guarantee) scheme, made permanent in July 2025, which backs lenders offering 91–95% mortgages on homes up to £600,000.
But "minimum" and "best value" aren't the same thing. Your deposit sets your LTV, and your LTV sets your interest rate. The more you put down, the lower the lender's risk and the cheaper your borrowing. So while 5% gets you through the door, every step up the deposit ladder lowers your monthly cost — which is why the size of your target matters as much as reaching it at all.
5% vs 10% vs 15% vs 20% — the trade-off
Here's what each deposit level means on a typical £243,000 first-time-buyer home. The pattern to notice is that the jumps aren't equal — the step from 5% to 10% is the most valuable one you can make:
| Deposit | Cash needed | LTV | Loan | Rate & monthly cost |
|---|---|---|---|---|
| 5% | £12,150 | 95% | £230,850 | Highest mainstream rates — priciest monthly |
| 10% | £24,300 | 90% | £218,700 | A clear rate improvement over 95% |
| 15% | £36,450 | 85% | £206,550 | Cheaper again; a comfortable tier |
| 20% | £48,600 | 80% | £194,400 | Among the best mainstream rates |
Two things fall out of this table. First, a bigger deposit cuts your monthly payment twice over — a smaller loan and a lower rate on it. Second, the single most valuable move for most buyers is getting from 5% to 10%: that jump crosses an LTV threshold into a better rate tier, and on a typical purchase it can save more each month than the extra £12,000 "cost" you to save. You do not need to chase 20%. You need to reach the next threshold, then decide whether the one after is worth the wait. See the full LTV rate ladder in the main mortgage guide, and model the monthly difference with the payment calculator.
What a deposit looks like by region
National averages hide how different this challenge is depending on where you buy. Using average regional prices from HM Land Registry's UK House Price Index (early 2026), here's the cash needed for a 10% deposit — the sensible target — across England:
| Region | Avg price | 5% deposit | 10% deposit |
|---|---|---|---|
| North East | £162,000 | £8,100 | £16,200 |
| Yorkshire & the Humber | £208,000 | £10,400 | £20,800 |
| North West | £215,000 | £10,750 | £21,500 |
| East Midlands | £242,000 | £12,100 | £24,200 |
| West Midlands | £246,000 | £12,300 | £24,600 |
| South West | £301,000 | £15,050 | £30,100 |
| South East | £379,000 | £18,950 | £37,900 |
| London | £542,000 | £27,100 | £54,200 |
Two honest caveats. First, first-time buyers typically buy below the regional average — the England-wide first-time-buyer average was around £243,000 in early 2026 — so your real target may be lower than the "all buyers" figure above. Second, these are averages with a wide spread inside every region; a deposit that's ambitious in one town is modest a few miles away. Use them to size the challenge, then set your target against the actual homes you're looking at.
Monthly saving targets & timelines
A deposit stops feeling impossible when you turn it into a monthly number. Here's how long it takes to reach a 10% deposit of about £24,300 at different monthly saving rates, before any Lifetime ISA bonus or interest (both of which get you there faster):
| Saved per month | Per year | To reach ~£24,300 |
|---|---|---|
| £200 | £2,400 | ~10 years |
| £300 | £3,600 | ~7 years |
| £400 | £4,800 | ~5 years |
| £600 | £7,200 | ~3.5 years |
| £800 | £9,600 | ~2.5 years |
The jump in speed as the monthly figure rises is why finding even an extra £100–£150 a month — a lodger, a side income, a cut subscription — moves your buying date forward by a lot. And these timelines are before the Lifetime ISA bonus and savings interest, both of which pull the date closer. Rather than work off a generic table, put your own target and monthly figure into the calculator for a realistic date.
The Lifetime ISA: 25% free money
If you're a first-time buyer aged 18 to 39, the Lifetime ISA (LISA) is usually the first place your deposit savings should go. It's the closest thing to free money in the system:
How the Lifetime ISA works
You can pay in up to £4,000 a year, and the government adds a 25% bonus — up to £1,000 a year. Save the full £4,000 and you have £5,000 working toward your deposit. Over four years, that's £4,000 of free bonus money on top of what you put in.
The money can be used for a first home worth up to £450,000, bought with a mortgage, at least 12 months after your first payment into the account. You can open a cash LISA (like a savings account) or a stocks-and-shares LISA.
The catch to know: if you withdraw for anything other than a qualifying first home (or before age 60), a 25% withdrawal charge applies — which can leave you with slightly less than you put in. And the £450,000 cap hasn't risen with prices, so it can bite in the most expensive areas. The LISA is due to be replaced by a new first-time-buyer product from April 2028; existing accounts continue.
For most first-time buyers the maths is simple: capture the LISA bonus first (up to £4,000 a year), because a guaranteed 25% uplift beats any savings rate. A couple buying together can each hold a LISA, doubling the annual bonus to £2,000. Just keep the £450,000 price cap and the 12-month rule in mind so the timing works.
Where to keep your deposit savings
Because a house purchase is usually a few years away — and you can't risk your deposit falling in value just before you buy — cash savings are generally more appropriate than the stock market for money you'll need soon. A sensible order for most savers:
- Lifetime ISA first — capture the 25% bonus on up to £4,000 a year (a cash LISA if buying within a few years).
- Then a competitive cash ISA or easy-access savings account for anything above the LISA limit, keeping the interest tax-efficient.
- Fixed-term accounts can pay more if you're confident you won't need the money before a set date — useful when your timeline is clear.
Compare current rates before committing, and check that any account lets you access the money in time for completion. This is general guidance, not a personal recommendation — where to hold savings depends on your circumstances and tax position, so consider independent advice if you're unsure.
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How to save faster
Beyond the headline account choice, the levers that move a deposit date forward the most are rarely glamorous — they're consistency and a few structural changes:
- Automate it. Set a standing order into your LISA or savings account for the day after payday, before the money is spendable. Saving what's left at month-end almost never works.
- Attack the big three. Rent, transport and food dwarf small treats. A house-share, a cheaper commute or a few months back with family (if that's an option) build a deposit faster than cutting coffees.
- Clear expensive debt in parallel. Credit-card and car-finance balances not only cost interest, they shrink how much you can later borrow — so paying them down helps twice.
- Add income where you can. A lodger under the Rent a Room scheme, overtime, or freelance work channelled straight to savings shortens the timeline sharply.
- Ring-fence windfalls. Bonuses, tax refunds and gifts go straight to the deposit, not into everyday spending.
Common deposit-saving mistakes
A few avoidable errors slow savers down or trip them up at the finish line:
- Forgetting the deposit isn't all the cash you need. Conveyancing, searches, a survey, mortgage fees and removals all fall due at purchase — keep a separate buffer on top of the deposit. See the full cost of buying a house.
- Missing the Lifetime ISA bonus by not opening one early enough — remember the 12-month rule before you can use it for a purchase.
- Chasing 20% when 10% would do. Over-saving can mean years more rent for a marginal rate gain, when reaching the next LTV threshold was the real prize.
- Putting a soon-needed deposit into the stock market and risking a fall right before completion.
- Ignoring debt. A clean saving record next to an untouched car loan can still shrink your eventual mortgage offer.
- Not automating, and relying on willpower at month-end — the slowest way to build a deposit there is.
Saving a deposit is a marathon, but it's a winnable one: pick a target that hits the next LTV threshold, capture the Lifetime ISA bonus, automate the monthly amount, and protect it from risk and from expensive debt. Do that consistently and the date you can buy stops being a vague hope and becomes a line in your calendar. When you're close, run your numbers through the deposit savings calculator and see what they buy in our Property Intelligence development guides.
Frequently asked questions
How much deposit do I need to buy a house in the UK?
The realistic minimum is 5% of the purchase price, giving a 95% loan-to-value mortgage — widely available in 2026 and supported by the Freedom to Buy mortgage guarantee scheme. On a typical £243,000 first home that's about £12,150. However, a 10% deposit (around £24,300) crosses into a better interest-rate tier and lowers your monthly payment, so aiming for 10% where you can is usually worth the extra time.
How long does it take to save for a house deposit?
It depends on your target and what you can put aside. To reach a 10% deposit of about £24,300, saving £400 a month takes roughly five years, £600 a month around three and a half years, and £800 a month about two and a half years — and those timelines shorten once you add a Lifetime ISA's 25% bonus and interest. Saving into a Lifetime ISA, where the government adds £1 for every £4 you save, is the single biggest accelerator for most first-time buyers.
What is a Lifetime ISA and how does it help?
A Lifetime ISA (LISA) is a savings account for first-time buyers aged 18 to 39. You can pay in up to £4,000 a year and the government adds a 25% bonus — up to £1,000 a year — which you can put toward a first home worth up to £450,000. Over a few years the bonuses add up to thousands of pounds of free money toward your deposit. The funds must be used for a qualifying first home or kept until age 60, or a withdrawal charge applies. The LISA is due to be replaced by a new first-time-buyer product from April 2028; existing accounts continue.
Where should I keep my house deposit savings?
For most first-time buyers a Lifetime ISA captures the 25% bonus first (up to £4,000 a year), with any savings beyond that in a competitive easy-access or fixed-term cash savings account or a regular cash ISA. Because a house purchase is usually a few years away and you can't risk the money falling in value just before you buy, cash savings are generally more appropriate than the stock market for a deposit you'll need soon. Compare current rates and check whether a fixed term suits your timeline.
Can my parents help with my deposit?
Yes. A gifted deposit from a close family member is common and accepted by lenders, provided it's a genuine gift with no repayment expected — the lender will usually ask for a signed letter confirming this. Other routes include a Joint Borrower Sole Proprietor mortgage, where a parent's income boosts your borrowing without them owning the property, and family offset or guarantor products. Each has tax and legal implications worth checking, so take advice before arranging one.
Is it better to save a bigger deposit or buy sooner?
There's a genuine trade-off. A bigger deposit lowers your loan-to-value, unlocks better rates and reduces your monthly payment — and getting from 5% to 10% is especially valuable because it crosses a rate threshold. But saving longer means more rent paid in the meantime and the risk that prices move. A sensible target for most buyers is the next LTV threshold (usually 10%) rather than an arbitrary large figure, then reassessing. Run both scenarios through a calculator before deciding.
Last reviewed: July 2026
Next review due: October 2026