First-Time Buyer Mortgage Deposit 2026: How Much You Actually Need
The minimum deposit is usually 5-10% of the purchase price, but the deposit size you choose has a big effect on the mortgage rate you're offered. Here's how deposit size, loan-to-value bands and monthly cost interact.
Minimum Deposit Requirements
Most mainstream UK lenders require a minimum deposit of 5-10% of the purchase price for a standard first-time buyer mortgage:
| Purchase price | 5% deposit | 10% deposit | 15% deposit |
|---|---|---|---|
| £200,000 | £10,000 | £20,000 | £30,000 |
| £250,000 | £12,500 | £25,000 | £37,500 |
| £300,000 | £15,000 | £30,000 | £45,000 |
| £400,000 | £20,000 | £40,000 | £60,000 |
A small number of specialist products offer 100% or near-100% mortgages, typically requiring additional security such as a guarantor's savings held with the lender, or a family member's property offered as additional collateral — these products are less widely available and often carry specific conditions worth reading carefully.
Why Deposit Size Affects Your Interest Rate
Mortgages are priced in loan-to-value (LTV) bands — the loan amount as a percentage of the property's value. A smaller deposit means a higher LTV (more borrowed relative to the property value), which lenders treat as higher risk, since there's less equity buffer if property prices fall.
| LTV band | Typical relative rate pricing |
|---|---|
| 95% (5% deposit) | Highest rates in this structure |
| 90% (10% deposit) | Noticeably lower than 95% band |
| 85% (15% deposit) | Lower again |
| 75% (25% deposit) | Often a meaningful further improvement |
| 60% (40% deposit) | Typically the best-priced band |
Because lenders price in these discrete bands rather than a smooth curve, being just over a threshold (e.g., a 91% LTV) versus just under it (89% LTV) can mean the difference between two different pricing tiers — sometimes it's worth finding a slightly larger deposit specifically to cross into the next lower band and access materially better rates across the whole loan.
Worked Example: The Effect of Crossing an LTV Band
Consider a £250,000 property purchase, comparing a 9% deposit (91% LTV) against a 10% deposit (90% LTV) — a difference of just £2,500 extra deposit.
| Scenario | Deposit | Loan amount | LTV band | Illustrative rate impact |
|---|---|---|---|---|
| 9% deposit | £22,500 | £227,500 | 91% (in the 95% pricing band) | Higher rate |
| 10% deposit | £25,000 | £225,000 | 90% (crosses into 90% pricing band) | Meaningfully lower rate |
Because mortgage rates are applied to the entire loan balance, a rate improvement of even a modest amount, applied across a 25-30 year mortgage term, can save considerably more in total interest than the extra £2,500 deposit required to reach the lower band — worth checking specific lender rate tables against your likely LTV before finalising your deposit target.
Schemes That Can Help Build or Reduce the Deposit Needed
| Scheme | How it helps |
|---|---|
| Lifetime ISA | 25% government bonus on savings up to £4,000/year, usable towards a first home up to £450,000 — directly boosts deposit savings |
| Mortgage guarantee schemes | Government-backed guarantee to the lender, enabling 95% LTV mortgages that might not otherwise be offered, without the buyer needing a bigger deposit |
| Guarantor mortgages | A family member's income, savings or property is used as additional security, sometimes reducing the deposit needed or improving affordability assessment |
| Joint Borrower Sole Proprietor | A family member is added to the mortgage (boosting affordability) without being a co-owner of the property |
| Gifted deposits | Family members can gift some or all of a deposit — most lenders accept this, requiring a signed letter confirming the gift is not a loan requiring repayment |
Availability and specific terms of these schemes change over time — always check current details directly with lenders or a mortgage broker rather than relying on older information.
Save Longer for a Bigger Deposit, or Buy Sooner With a Smaller One?
This is genuinely dependent on individual circumstances and local market conditions rather than having a universal right answer:
| Factor | Favours buying sooner with a smaller deposit | Favours waiting and saving more |
|---|---|---|
| Local property prices rising faster than your savings rate | Yes — waiting may mean needing an even bigger deposit later | — |
| Local property prices stable or falling | — | Yes — waiting doesn't cost you relative ground |
| Large rate improvement available at next LTV band | — | Yes — worth the extra saving time for better long-term rate |
| Rental costs currently very high relative to likely mortgage payment | Yes — delay has an ongoing rental cost | — |
Running the actual numbers for your specific target area and realistic savings timeline is more useful than following a general rule either way.
Costs Beyond the Deposit
First-time buyers commonly underestimate the costs required on top of the deposit itself:
| Cost | Typical range |
|---|---|
| Mortgage arrangement/product fee | £0 – £2,000+ (sometimes added to the loan instead of paid upfront) |
| Valuation fee | £0 – £300 (often free with certain products) |
| Survey (recommended beyond the lender's basic valuation) | £300 – £1,000+ depending on survey level |
| Solicitor/conveyancing fees | £800 – £1,500+ |
| Stamp Duty Land Tax | Varies — first-time buyer relief applies up to certain thresholds, but can still be due above that, especially in higher-cost areas |
| Removals | £300 – £1,500+ |
Budgeting a contingency of several thousand pounds beyond the deposit itself, rather than assuming the deposit is the only upfront cost, avoids a last-minute scramble for extra funds close to completion.
Frequently asked questions
Related reading
How Much Deposit Do You Need to Buy a House in the UK in 2026?
Minimum deposit is 5% but most lenders prefer 10%. On the average UK house price of £285,000, that's £14,250 to £28,500. Here's how deposit size affects rates, SDLT and monthly costs.
Mortgage on a Flat With Cladding in 2026: What Lenders Accept
EWS1 ratings, which lenders accept B1/B2 cladding, the Building Safety Fund, and a practical checklist for buyers of flats with cladding issues.
Buildings and Contents Insurance Explained 2026
What buildings and contents insurance covers, how to set your sum insured correctly, flood risk ratings, new-build cover, and HMO insurance requirements.