MORTGAGE How Much Deposit Do You Really Need in 2026?
The honest answer is more than 5% and probably less than 25%. Here is how to find your number, balancing rate, monthly payment and the time it takes to save.
Key Takeaways
- 1Lenders price in LTV bands at 95%, 90%, 85%, 80% and 75%, so the threshold you cross matters more than the exact pound figure
- 2The biggest rate improvement for most buyers comes between 90% and 85% LTV, not between 85% and 75%
- 3Plan for an extra 3 to 5 percent of the purchase price in fees, surveys, conveyancing and moving costs
- 4A Lifetime ISA bonus of up to £1,000 a year is the single best deposit accelerator for buyers under 40
- 5Once you clear your target band and have a separate emergency fund, more saving rarely beats buying
Why the Number Matters More Than You Think
Your deposit does two jobs at once. It reduces the amount you need to borrow, and it sets the loan-to-value (LTV) band that lenders use to price your rate. Cross an LTV threshold and the rate steps down. Stay just above it and you pay a premium for the entire fixed period.
Most first-time buyers are told to aim for 10%. That is decent advice for a starting point, but the honest answer depends on the price band you are buying in, how long you plan to stay, and how much longer it would take to save more.
The LTV Bands Lenders Actually Use
Lenders price mortgages in bands. The thresholds that matter most for residential borrowers in 2026 are these:
95%
5% deposit
Highest rates
90%
10% deposit
Common FTB band
85%
15% deposit
Best value step
75%
25% deposit
Lowest mainstream rates
The biggest single drop in rate usually sits between 90% and 85%. Saving the extra 5% of the purchase price often shaves more off your monthly payment than the next 10% of deposit will. Below 75% the savings start to flatten out, which is why we call 75% the floor of mainstream pricing.
A Worked Example on a £275,000 Home
Take a typical UK first-home purchase price of around £275,000. The deposit you put down changes both the borrowing and the rate you qualify for.
Plug your own numbers into the repayment calculator to see how each band changes your monthly cost.
The move from 95% to 90% typically buys you a meaningfully lower rate and removes the lender's reliance on the Mortgage Guarantee Scheme. The move from 90% to 85% usually gives the biggest pound-for-pound saving on monthly payments. Beyond 75%, the rate barely budges, so extra savings are better spent on furnishings, an emergency fund, or an overpayment in year one.
The Costs People Forget to Save For
Your deposit is not the only cash you need on completion day. Plan to have roughly 3 to 5 percent of the purchase price set aside for the costs around the move itself. Some of this is mandatory, some is optional but sensible.
Stamp duty (if applicable)
First-time buyers pay nothing up to £300,000. Home movers pay from £125,000. Run the numbers with the stamp duty calculator.
Conveyancing and searches
Budget around £1,500 to £2,500 including local authority searches, land registry fees, and the solicitor's bill.
Survey
A Level 2 HomeBuyer Report runs around £400 to £700. For older homes, a Level 3 building survey is worth the extra.
Mortgage product and broker fees
Product fees range from £0 to about £1,500 and can usually be added to the loan. Many brokers charge nothing on residential cases.
Removals and first month
Removals run £400 to £1,500. Leave room for the boiler service, white goods, and the first council tax bill.
Smart Ways to Grow the Deposit
Once you know which LTV band you are aiming for, the next question is how fast you can get there. Four routes do most of the heavy lifting in the UK.
Lifetime ISA
Save up to £4,000 a year and the government adds a 25% bonus, capped at £1,000 a year. Usable on properties up to £450,000. Must be opened between ages 18 and 39.
Cash ISA or easy-access savings
For money you might need within 2 years, prioritise access over a tiny rate uplift. Check the FSCS protection limit covers your balance.
Family gift or loan
Gifted deposits are accepted by every major lender, but a signed gift letter is required. Loans from family are treated differently and can hurt affordability, so be transparent.
Joint borrower sole proprietor
If a parent's income (rather than savings) is the bottleneck, a JBSP arrangement can let them support the mortgage without going on the deeds.
When You Should Stop Saving and Buy
Bigger is not always better. Three signals suggest your deposit is large enough to act on.
- You have cleared the LTV threshold for the rate band you want and an extra year of saving would only nudge you into the next band slowly.
- Rents in your area are rising faster than house prices, so waiting costs you more in rent than the price drop you might gain.
- You have an emergency fund of 3 to 6 months of essential outgoings, separate from the deposit, so a boiler failure in month two does not derail you.
If none of those apply, keep saving and revisit every three months. The market does not need to be timed, but personal readiness does.
See what your deposit buys you
Try different deposit sizes against your salary and see how the LTV band changes your borrowing.
This guide is for general information only and does not constitute financial advice. Mortgage Lens is not authorised by the Financial Conduct Authority. Speak to a qualified mortgage adviser before making borrowing decisions.