Buy-to-Let Deposit: How Much You Need in 2026 (and Why It’s Usually 25%)
How much deposit do you need for a buy-to-let? Usually 25% — but the honest answer is that your rent sets the figure, not a rule. Here’s the deposit at every price and LTV band, the real all-in cash beyond the deposit, and why the 25% “standard” is really the rental-cover test in disguise.
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Quick answer
Most buy-to-let mortgages need a deposit of at least 25% of the property price — a 75% loan-to-value (LTV) — so on a £200,000 property that’s £50,000. Some lenders go to 20% (80% LTV) for strong cases, a handful reach 85% LTV at higher rates, and the best rates unlock at 40% down (60% LTV). But the number most guides miss is why 25% is standard: it isn’t a fixed rule, it’s what falls out of the rental cover test. Lenders require your rent to cover the mortgage interest by 125–145%, and on typical 2026 rates and rents, 25% down is simply the deposit at which the average property’s rent clears that test — push the loan higher and the rent often can’t stretch to cover it. So your rent sets your deposit, not the other way round. Two more essentials: the deposit isn’t your only upfront cash — with stamp duty (including the 5% surcharge) and fees, the true all-in on a £200,000 purchase is around £63,500, of which the deposit is about 79%; and a bigger deposit does double duty, both passing the rent test and dropping you into cheaper LTV rate bands. Limited-company, HMO and first-time-landlord cases shift the numbers, all covered below. Much buy-to-let lending is not regulated by the FCA.
Your property may be repossessed if you do not keep up repayments on your mortgage.
In this guide
How much deposit: the numbers at every price
The buy-to-let deposit is a percentage of the purchase price, set by the maximum LTV the lender offers. Here’s what that means in cash across common price points and bands:
| Property price | 15% (85% LTV)* | 20% (80% LTV) | 25% (75% LTV) | 40% (60% LTV) |
|---|---|---|---|---|
| £150,000 | £22,500 | £30,000 | £37,500 | £60,000 |
| £200,000 | £30,000 | £40,000 | £50,000 | £80,000 |
| £250,000 | £37,500 | £50,000 | £62,500 | £100,000 |
| £300,000 | £45,000 | £60,000 | £75,000 | £120,000 |
*85% LTV buy-to-let exists but is a small, higher-rate corner of the market. 25% (75% LTV) is the workhorse — the level most lenders price around and most landlords use. Going to 20% widens your buying power but narrows your lender choice and lifts your rate; going to 40% buys you the cheapest rates and the easiest rental-cover pass. Which of these you actually need — as opposed to prefer — is decided by the next section.
Why it’s usually 25% — the real reason
Ask “why 25%?” and most answers say “because that’s the rule.” It isn’t. The 25% standard is a by-product of the rental cover test (ICR), and understanding that changes how you plan a purchase. Lenders assess buy-to-let affordability on whether the rent covers the mortgage interest by 125% (basic-rate and limited-company borrowers) to 145% (higher-rate taxpayers) at a stress rate. Watch what happens to a £200,000 property renting at £950/month as the deposit shrinks and the loan grows, on an illustrative 5.25%:
| Deposit | Loan | Interest/mo | Rent covers | Passes 125%? |
|---|---|---|---|---|
| 25% (£50,000) | £150,000 | £656.25 | 145% | Yes — comfortably |
| 20% (£40,000) | £160,000 | £700.00 | 136% | Yes |
| 15% (£30,000) | £170,000 | £743.75 | 128% | Only just |
See the mechanism: the smaller your deposit, the bigger your loan, the more interest the rent must cover — and the rent is fixed by the market, not by you. At 25% down this property sails through even the higher-rate 145% test; by 15% it barely scrapes the basic-rate 125% and fails the higher-rate one entirely. 25% is “standard” because it’s the deposit at which a typical property’s rent comfortably clears the test — lenders didn’t pick it arbitrarily, the arithmetic did. The practical upshot is powerful: in strong-yield areas where rents are high relative to prices, you may need less deposit because the rent stretches further; in low-yield areas (much of the South East), you may need more than 25% to make the sums work, regardless of what the headline LTV allows — and higher-yielding niches like holiday and short-term lets can shift the calculation again. Your deposit requirement is really a rent calculation wearing a percentage. The full ICR maths — stress rates, five-year-fix concessions, maximum-loan-from-rent — is in our interest-only vs repayment guide, and product choice moves the result too.
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Beyond the deposit: the true cash needed
The deposit is the biggest number but not the only one, and first-time landlords routinely under-budget. The full upfront stack on a £200,000 purchase at 25% down:
| Cost | Amount | Notes |
|---|---|---|
| Deposit (25%) | £50,000 | The headline figure |
| Stamp duty + 5% surcharge | £11,500 | Additional-property surcharge applies to most BTL (England) |
| Legal, valuation, broker | ~£2,000 | Conveyancing, survey, any broker fee |
| True all-in | ~£63,500 | Deposit is ~79% of the cash needed |
That extra ~£13,500 is the gap between “I’ve got the deposit” and “I can complete.” The 3% additional-property SDLT surcharge became 5% in October 2024, so on buy-to-let it’s a bigger line than many landlords remember — and it’s payable in cash, not addable to the mortgage. Budget the whole stack before you offer; the first-time landlord guide walks through the full first-purchase checklist, including the stamp duty differences between buyer types (a homeowner buying a rental pays that surcharge; some situations don’t).
Why a bigger deposit pays for itself
The deposit does two jobs at once
A larger deposit doesn’t just pass the rent test more easily — it drops you into a cheaper LTV rate band, and buy-to-let rates step down meaningfully at 75%, 65% and 60%. On the same £150,000 loan, moving from a ~5.2% (higher-LTV) rate to a ~4.8% (lower-LTV) rate saves about £50 a month — £600 a year, £3,000 over a five-year fix — purely from the band, before you count the smaller loan itself. So the choice between, say, 25% and 35% down isn’t only “how much cash do I tie up” — it’s “how much rate do I buy.” For landlords sitting near a band threshold, finding the extra to cross it is often the highest-return use of that cash, especially on interest-only where the rate applies to the whole balance every month. The flip side: cash tied in deposit isn’t available for the next deposit, so portfolio builders deliberately run higher LTVs to spread capital across more properties — lower rate versus more doors is a genuine strategy fork, not a right answer.
Company, HMO and first-timer differences
The 25% baseline shifts with structure:
- Limited company BTL. Company purchases often want a slightly higher deposit — commonly 25% but sometimes more — and historically carried a small rate premium (now narrowing). The trade is worth it for higher-rate taxpayers escaping Section 24, but factor the deposit and rate into the personal-versus-company sum, ideally with a tax adviser.
- HMOs. Houses in multiple occupation typically need 25% and often more, plus lender requirements for landlord experience — the higher yields come with higher deposits and stricter criteria, as the first-timer guide covers.
- First-time landlords. No automatic deposit penalty if you own your own home, but a first-time buyer going straight to BTL faces a narrower panel that may want more down. Homeownership matters more than landlord experience for the deposit itself.
- New-build flats and ex-local-authority. Some lenders impose higher deposits (e.g. 25–30%) on property types they view as higher-risk — a criteria quirk a broker navigates rather than a universal rule.
Where the buy-to-let deposit comes from
Three common sources, each with a caveat. Savings — cleanest, but the surcharge and fees mean budgeting the full ~£63,500, not just the £50,000. Releasing equity from your own home — very common: a remortgage of your residence raises the rental deposit, but it increases borrowing against the home you live in to fund an investment, so model it deliberately rather than defaulting to it. Equity from an existing rental — portfolio landlords remortgage one property to deposit the next, recycling capital, which builds portfolios fast but raises leverage across the whole holding. Note that gifted deposits are treated more cautiously in BTL than in residential — some lenders accept them, others don’t, and borrowed deposits (e.g. loans or credit) are widely refused because they distort the affordability picture. Whatever the source, lenders want it evidenced and traceable; a broker matches your deposit source to lenders comfortable with it.
The bottom line
Plan for 25% — £50,000 on a £200,000 property — as the working assumption, with 20% possible at a price, 40% unlocking the best rates, and the true all-in nearer £63,500 once the 5% stamp duty surcharge and fees are in. But hold the real insight: the deposit isn’t a rule you meet, it’s an output of the rent test, so a high-yield property may need less and a low-yield one more, whatever the headline LTV says. Size the deposit to the rent, budget the whole cash stack rather than the deposit alone, and treat every extra 5% you can put down as buying both an easier approval and a cheaper rate band. Then let a broker match your numbers to the lenders whose criteria actually fit them.
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Buy-to-let deposits: FAQs
How much deposit do you need for a buy-to-let?
Usually at least 25% of the property price — a 75% loan-to-value — so £50,000 on a £200,000 property. Some lenders accept 20% (80% LTV) for strong cases at higher rates, a small higher-rate corner of the market reaches 85% LTV, and the best rates unlock at 40% down (60% LTV). The exact figure you need depends on your rent, because lenders require the rent to cover the mortgage interest by 125–145%, so in high-yield areas you may need less and in low-yield areas more. Remember the deposit isn’t the only upfront cost.
Why is the buy-to-let deposit usually 25%?
Because of the rental cover test, not an arbitrary rule. Lenders require rent to cover the mortgage interest by 125% to 145% at a stress rate, and on typical 2026 rates and rents, 25% down is the deposit at which an average property’s rent comfortably clears that test. Push the loan higher on a smaller deposit and the fixed market rent often can’t stretch to cover the larger interest bill. So 25% is really the rental-cover test expressed as a percentage — which is why strong-yield properties can sometimes need less and low-yield ones more.
Can you get a buy-to-let mortgage with a 20% or lower deposit?
Sometimes. A number of lenders offer 80% LTV (20% deposit) buy-to-let for strong applications, and a small, higher-rate segment reaches 85% LTV (15% deposit). Both narrow your lender choice, raise your rate, and demand the rent stretch further to pass the cover test — on a £200,000 property at 15% down, £950 rent covers only about 128% of interest, clearing the basic-rate 125% test only just and failing the higher-rate 145% one. Lower-deposit buy-to-let exists but costs more and suits fewer properties; a broker will tell you quickly whether your rent supports it.
What’s the total cash needed for a buy-to-let, beyond the deposit?
More than the deposit alone. On a £200,000 purchase at 25% down, the deposit is £50,000, but stamp duty including the 5% additional-property surcharge adds about £11,500 in England, and legal, valuation and any broker fees add roughly £2,000 — an all-in of around £63,500, with the deposit about 79% of it. The surcharge rose from 3% to 5% in October 2024 and is payable in cash, not added to the mortgage. Budget the whole stack before offering; underbudgeting the extras is a common first-time-landlord mistake.
Does a bigger deposit get you a better buy-to-let rate?
Yes — buy-to-let rates step down at lower LTV bands, notably 75%, 65% and 60%. On a £150,000 loan, moving from a higher-LTV rate around 5.2% to a lower-LTV rate around 4.8% saves roughly £50 a month, £600 a year, or £3,000 over a five-year fix, purely from the band and before the smaller loan is counted. So finding extra deposit to cross a band threshold is often a high-return use of cash. The counterweight for portfolio builders is that capital tied in a large deposit isn’t available for the next purchase, so some deliberately run higher LTVs to buy more properties.
Can I use equity from my home as a buy-to-let deposit?
Yes, and it’s very common — remortgaging your own home to release equity for a rental deposit, or remortgaging an existing rental to fund the next. Both work and both raise borrowing: against your home in the first case, across your portfolio in the second, so model the added risk deliberately. Gifted deposits are treated more cautiously in buy-to-let than in residential lending, with some lenders accepting them and others not, while borrowed deposits from loans or credit are widely refused. Lenders want the deposit source evidenced and traceable whatever it is.
- GOV.UK — Stamp Duty Land Tax (rates and the additional-property surcharge)
- UK Finance — Buy-to-Let Lending data (2026 market rates and cover ratios)
- MoneyHelper — free, government-backed money guidance
Important information
nextmove is an introducer, not a lender or adviser. This article is for general information only and does not constitute financial or tax advice. Figures are illustrative: rates, stress rates, rental-cover requirements and maximum LTVs vary by lender and change, and stamp duty is shown on England’s 2026 bands (Scotland and Wales differ). Your actual deposit requirement depends on the rent, the property, your tax band and lender criteria. Releasing equity to fund a deposit increases your borrowing and risk; incorporation and portfolio decisions have tax consequences — take advice from a qualified tax adviser before acting. We introduce you to FCA-regulated, whole-of-market mortgage brokers who can advise, and we may receive a fee or commission for doing so. Much buy-to-let lending is not regulated by the FCA.
Your property may be repossessed if you do not keep up repayments on your mortgage.
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