Holiday Let Mortgages: How Lenders Assess Seasonal Income

A holiday-let mortgage funds a property that earns its keep in short, furnished stays rather than a single twelve-month tenancy. That one difference, income that rises and falls with the season instead of a fixed monthly rent, changes almost everything about how a lender underwrites the loan. Fewer lenders offer these products, deposits run a little higher, and the amount you can borrow is set by a blended seasonal average rather than the best week of August.

This is a finance-mechanics guide. It covers how holiday-let lending actually works: the seasonal affordability basis, why short-term and Airbnb letting sits on a specialist panel, the planning and registration overlay, limited-company holiday-let lending, and how the interest coverage ratio bites on variable income. The tax angle changed materially when the Furnished Holiday Lettings regime ended in April 2025, so we summarise that here and link to the full property tax guides rather than re-arguing it.

What makes a holiday-let mortgage different from a standard buy-to-let

A standard buy-to-let is underwritten on a known, contractual rent: one tenant, one assured shorthold tenancy, one monthly figure the lender can stress against an interest coverage ratio. A holiday let has none of that certainty. The income arrives in irregular bookings, peaks in the summer or over a festive week, and can fall to almost nothing in the low season. Lenders treat that variability as a credit risk and price and structure the loan accordingly.

The practical consequences are consistent across the specialist panel. The lender pool is smaller, concentrated in building societies and specialist lenders rather than the high street. Maximum loan-to-value is usually a little more conservative, commonly 70% to 75% rather than the 75% to 80% available on mainstream buy-to-let. Rates sit modestly above equivalent buy-to-let products. And crucially, the income the lender uses is not the headline nightly rate you see on a booking site but a blended, discounted figure designed to reflect a realistic year.

Everything else follows the general buy-to-let framework. If you want the wider picture of how buy-to-let lending works before drilling into the holiday-let specifics, start with our buy-to-let mortgages guide, and see what drives buy-to-let mortgage rates for why a holiday-let product carries a small premium.

How lenders assess seasonal holiday-let income

This is the heart of holiday-let underwriting. Rather than a single rent, the lender builds an assessed income figure from a seasonal projection, then treats that figure exactly as it would a buy-to-let rent. There are two common methods:

• Blended seasonal average. The lender takes low, mid and high-season weekly rates, usually from a professional holiday-letting agent's projection or a market data estimate, and averages them into a sustainable monthly figure. This is the most common approach.
• Discounted annual projection. The lender takes the projected gross annual letting income and applies a discount (for voids, cleaning, agent fees and off-season weeks) before converting to a monthly figure.

Both methods share the same purpose: to avoid lending against the peak. A cottage that commands £1,500 a week in August might let for £400 a week in January and sit empty for parts of the shoulder season. Underwriting on the August rate would let an owner borrow far more than the property can sustainably service across a full year, so lenders deliberately look through it to the average.

Worked example: a coastal cottage on a blended average

Take a £250,000 coastal cottage. A letting agent projects gross income of roughly £24,000 a year, which blends to about £2,000 a month across the seasons, but the low-season run only produces around £1,100 a month. A holiday-let lender advances 70% of value, a £175,000 loan, and assesses affordability on the blended £2,000, not the peak weeks.

At a stressed notional rate of around 5.5%, the interest on £175,000 is about £802 a month. Applied to a 125% interest coverage ratio, the assessed income needs to cover roughly £1,002 a month (£802 × 1.25). The blended £2,000 clears that comfortably, so the loan is affordable on the lender's test. Had the lender instead used the £1,100 low-season figure, the case would be far tighter, and had an owner assumed the peak-week rate as if it ran all year, they would have tried to over-borrow against income the property cannot deliver in February.

The lesson is that borrowing capacity on a holiday let is a function of the sustainable average and the interest coverage ratio, not the best week on the calendar. You can model the same test on your own figures with our buy-to-let rental stress test calculator and size the loan with the buy-to-let mortgage calculator.

Short-term lets, Airbnb and the planning overlay

Most mainstream buy-to-let mortgages explicitly prohibit short-term or holiday letting in their conditions, so running an Airbnb on a standard buy-to-let product without consent is a breach of the mortgage terms. The holiday-let panel exists precisely because it accepts short-term letting openly and prices for it. Matching the product to the intended use from the start avoids a serious problem later.

Lenders on this panel also scrutinise whether short-term letting is actually permitted at the property. They will look at the lease and any freeholder covenants, the local planning position, and whether the area operates a registration or licensing scheme for short-term lets. Rules have tightened across the UK: parts of England, Wales and Scotland now require planning permission, a change of use, or registration before a property can be let short-term, and some areas restrict new short-term lets. The government's proposals for a short-term lets registration scheme and planning changes in England are the live direction of travel, and Scotland already operates a short-term let licensing regime. A planning restriction can undermine the entire business case, so confirm the local authority position before committing.

Loan-to-value, deposit and the interest coverage ratio

Holiday-let lenders typically cap at 70% to 75% loan-to-value, so a 25% to 30% deposit. The tighter ceiling reflects the variable income and the narrower lender pool. It also has a knock-on benefit on affordability: a larger deposit means a smaller loan, which lowers the stressed interest and makes the interest coverage ratio easier to clear on a blended income. On a marginal case, adding equity can turn a decline into an offer.

The interest coverage ratio (ICR) itself follows the standard buy-to-let framework set out in the Prudential Regulation Authority's supervisory statement on buy-to-let underwriting. For basic-rate individual borrowers and for limited-company borrowers the ratio is typically 125%; for higher and additional-rate individual borrowers it is often 145%, reflecting the Section 24 finance-cost restriction that applies to personal ownership. The stress rate is commonly around 5.5% on shorter fixes and variable products, sometimes lower on five-year-plus fixes, but it is lender-specific and moves with the market, so verify it at the time you apply. These are the norms described in the PRA's SS13/16 underwriting standards for buy-to-let. The point unique to holiday lets is only that the rent fed into the test is the blended seasonal figure, not the peak.

Buying a holiday let through a limited company or SPV

Several holiday-let lenders lend to limited companies and single-purpose vehicles, usually at the same loan-to-value bands as personal borrowing and sometimes at a small rate premium. The attraction is on the tax side rather than the lending side: a company deducts mortgage interest in full against profit, whereas an individual owner is now restricted to a basic-rate tax credit under Section 24, since holiday lets fell into the ordinary property-income rules when the Furnished Holiday Lettings regime ended.

Whether personal or company ownership is right for a holiday let is a genuine tax and structuring decision that turns on your other income, your plans for the property, and your eventual exit. It should be worked through before you apply, because changing the borrower after an offer means starting again. Our limited company versus personal ownership tax comparison sets out the decision in full, and the Section 24 tax relief guide explains the finance-cost restriction that makes the company route attractive to higher-rate owners.

The Furnished Holiday Lettings tax regime ended in April 2025

For years, a property that met the Furnished Holiday Lettings (FHL) conditions enjoyed a favourable tax regime: capital allowances on furnishings and equipment, access to business-asset capital gains reliefs, and profits that counted as relevant earnings for pension contributions. That regime was abolished by Finance Act 2025, from 1 April 2025 for corporation tax and 6 April 2025 for income tax and capital gains tax. Holiday lets are now taxed under the normal property-income rules, which means individual owners fall within the Section 24 restriction on mortgage interest relief in the same way as any other landlord.

This matters for the after-tax return on a holiday let, not for whether you can get the mortgage. The lending assessment is unchanged: a lender still underwrites on blended seasonal income and the interest coverage ratio regardless of tax status. Because the old perks that once justified buying a holiday let specifically for tax reasons have gone, the case for one now rests on the letting economics and any lifestyle value, which makes an honest income projection more important than ever. For the tax detail, see our guides on how much tax you pay on a holiday let, the end of the Furnished Holiday Letting regime, and what the FHL abolition means for individual owners. If you are weighing a holiday let against a longer-term rental, the serviced accommodation versus buy-to-let tax comparison puts the two side by side. HMRC's historic FHL guidance sits in the Property Income Manual at PIM4100, and the abolition is documented in the government's policy paper on abolishing the FHL regime.

Where a holiday let tips into a regulated mortgage

Holiday-let lending on the specialist panel is unregulated business lending: the property is a business asset let commercially to guests, and an introduction to a finance broker is a bare introduction, not regulated advice. A limited amount of owner use during the year is accepted by many lenders as part of a genuine letting business.

There is a line, though, and it matters. If the property is bought mainly so that you or a close relative can occupy it, or if your personal use is substantial rather than incidental, the loan can become a regulated mortgage contract or a consumer buy-to-let under the Financial Conduct Authority's rules rather than unregulated business lending. That is a different, regulated product with different protections, and it is not something we introduce. If what you actually want is a second home you will use for much of the year, with occasional letting to offset costs, that is very likely a regulated case: speak to an FCA-authorised mortgage adviser rather than treating it as a business let. The boundary is drawn in FCA PERG 4.10A and the underlying Regulated Activities Order.

Choosing a lender and where the tax and finance sides meet

The holiday-let panel is small and its rules vary widely: on acceptable income evidence, minimum personal income, short-term-let and Airbnb stance, location, and whether first-time landlords are considered. Because the pool is narrow, applying to the wrong lender is a common and avoidable cause of decline. A whole-of-market broker who knows which lenders accept your income basis and letting model, and which will look at a coastal, rural or first-time case, saves wasted applications. For the wider view of who lends on what, see our guide to buy-to-let mortgage lenders.

The two sides of a holiday-let purchase fit together closely. The tax question (personal or company ownership, the post-FHL position, deposit efficiency) shapes the finance question (which borrower the lender is underwriting, at what interest coverage ratio), and getting the order wrong means redoing the application. We handle the tax and structuring side as the property brand's own service, and where a holiday-let mortgage is needed we can make a soft, business-purpose introduction to a specialist finance broker. That introduction is a name and a business-purpose gate, not advice on a specific product or lender, and the consumer and regulated scenarios above stay firmly outside it. The financial-promotion perimeter that keeps it a bare introduction is set by section 21 of the Financial Services and Markets Act 2000.

If you want the tax side reviewed first, tell us about the property and how you intend to let it using the form below, and we will point you in the right direction.