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
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