✅ What are the requirements for a buy to let mortgage?
BTL is assessed on the property’s rental income, not primarily your salary. The checklist: a deposit of 25% as standard (specialists sometimes 15–20%; 30–40% unlocks noticeably better rates, and weak EPC ratings can push the minimum up); age typically 21–25 minimum with maximums around 85–95 at term end; first-time landlords often need personal income, while experienced landlords frequently need none at all. Disqualifiers: recent bankruptcy, a repossession within ~6 years, or an unlettable property. Most BTL sits outside FCA regulation, many deals run interest-only, and portfolio landlords face whole-portfolio PRA review at four properties. Money Pilot covers it all across 200+ lenders at zero broker fees — FCA regulated (FRN: 968705).
Buy-to-let mortgages get assessed on a genuinely different basis to the mortgage on your own home, and knowing exactly what lenders are checking before you apply saves you from a wasted application, or worse, an accepted offer at a rate you could have improved with better preparation. Let’s go through it properly.
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Unlike a residential mortgage, which focuses heavily on your personal income, buy-to-let lending is assessed primarily on the property’s rental income. Lenders want that rental income to cover somewhere between 125% and 145% of the mortgage payment, stresstested at a notional higher rate than you’re actually being offered, to make sure the numbers still work if rates rise or you hit a void period between tenants.
What deposit do you actually need?
Most lenders require a minimum of 25%, though this varies:
- Some specialist lenders will consider 15-20% in specific circumstances, though the pool of lenders offering this shrinks considerably
- Holiday lets typically need a minimum of 20% through a specific holiday let product, standard BTL mortgages generally exclude holiday lets altogether
- A larger deposit, 30-40%, genuinely unlocks noticeably better rates, it’s not just a marginal improvement
My top tip: if you’re anywhere close to a deposit threshold, 20% versus 25%, say, it’s worth checking whether stretching that extra 5% opens up a meaningfully wider, cheaper pool of lenders before you commit to a property.
Does the property’s EPC rating affect your deposit?
Increasingly, yes, worth knowing given how much attention EPC requirements are getting. Some lenders now require a larger deposit, for example 25% rather than the standard 20%, if the property has a weaker EPC rating (D or E), reflecting both the property’s lower current efficiency and the future cost of bringing it up to any new minimum standard.
What age do you need to be?
Technically 18, but in practice most mainstream lenders set a minimum around 21-25. At the other end, maximum age at the end of the mortgage term is typically 70-75, though several lenders remove any upper age limit entirely for experienced landlords putting down a larger deposit, commonly 35% or more.
Do you need a minimum income?
This depends heavily on whether you’re a first-time landlord or an experienced one:
- First-time landlords are often assessed more like a residential mortgage applicant, personal income matters, and borrowing may be capped using a multiple of salary similar to standard mortgage lending, alongside a lower maximum LTV, commonly 70- 75%.
- Experienced landlords with an existing portfolio are frequently assessed with no minimum personal income requirement at all, since the rental income itself, alongside your track record, carries the weight instead.
What disqualifies someone from a buy-to-let mortgage?
Common exclusions across the market include:
- Being currently bankrupt, or having been bankrupt within roughly the last 4 years
- Having had a property repossessed within roughly the last 6 years
- The property not being in a genuinely lettable condition
Is a buy-to-let mortgage regulated by the FCA?
Generally, no. Most buy-to-let mortgages sit outside FCA regulation, since they’re treated as a business or investment activity rather than consumer lending. This means fewer standardised protections apply than with a residential mortgage, worth understanding clearly before signing anything.
Can portfolio landlords get a buy-to-let mortgage?
Yes, most lenders actively accept applications from portfolio landlords, though if you own four or more mortgaged buy-to-let properties, PRA rules require a more detailed, wholeportfolio assessment rather than looking at the new property in isolation.
Are buy-to-let mortgages interest-only or capital repayment?
Many are structured as interest-only, where your monthly payment covers just the interest, and the original loan is repaid at the end of the term, typically through sale or refinance. Capital repayment options exist too, though interest-only remains the more common structure for landlords focused on cash flow and yield.
What costs beyond the deposit should you budget for?
Buy-to-let purchases currently carry a stamp duty surcharge on top of standard rates, and rental income is subject to income tax or corporation tax depending on your ownership structure, with mortgage interest relief for individual landlords no longer fully deductible against rental income following the Section 24 tax changes. These factor into whether a specific investment genuinely stacks up, not just whether you can secure the mortgage itself.
What documents will you typically need?
- Proof of ID and address
- Evidence of your deposit
- For first-time landlords, proof of personal income
- For experienced landlords, a portfolio schedule showing existing properties, rental income, and mortgage balances
- Details of the property’s projected rental income, often via a letting agent’s assessment
The bottom line
Buy-to-let mortgage requirements centre on the property’s rental income and your deposit far more than your personal salary, particularly once you have some landlord experience behind you. Get your deposit as strong as you can, understand how rental coverage and stress testing actually work, and check the specific criteria, age limits, EPC-linked deposit requirements, portfolio assessment rules, before you commit to a property, not after.
