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Repayment method

Interest-only mortgage and your repayment strategy

An interest-only mortgage keeps the monthly payment lower because none of it pays off the loan. The catch is the end of the term: the whole balance is still owed, and a lender will usually want to see a believable plan for clearing it before it agrees. Whether that plan is selling the home, selling another property, investments or a pension lump sum, the strategy gets assessed, not just the payment. This note is general information from Property Money Limited — not advice and not a personal recommendation.

The problem

Two groups usually end up asking about interest-only. Some want a lower monthly payment on a new purchase or remortgage and have assets they expect to repay from later. Others already have an interest-only mortgage, often taken out years ago, and the end of the term is getting close without a clear plan for the balance.

Both hear mixed messages: “nobody does interest-only any more” on one side, “just sell the house at the end” on the other. Neither is quite right. Interest-only is still available from some lenders, but it is assessed on the repayment strategy as much as on income, and the rules on which strategies count are lender-specific.

What usually matters

• The repayment strategy itself. Lenders want to know how the balance will be cleared at the end of the term. Common strategies include sale of the mortgaged property, sale of other property, investments such as ISAs or shares, a pension lump sum, or a mix. Some strategies are accepted by some lenders and refused by others; hoped-for inheritances and future pay rises are generally not treated as a strategy.
• Sale of the mortgaged property. Where a lender accepts “downsizing” as the plan, it often wants a meaningful amount of equity left after the loan is repaid, sometimes with higher minimums in pricier regions, and a lower loan-to-value. The idea is that you could repay and still afford somewhere to live. Exact thresholds vary by lender and change over time.
• Loan-to-value. Interest-only is usually offered at a lower maximum LTV than repayment, so more equity or deposit is needed. Part-and-part (some of the loan interest-only, some repayment) can sit between the two.
• Income and affordability. A lower monthly payment does not mean a lighter affordability test. Some lenders assess interest-only cases as if they were on repayment, and some set a minimum income for interest-only at all. See affordability and existing debts.
• Evidence for the strategy. Investment or pension statements, valuations or mortgage statements for other property, and projections where relevant. Underwriters often look at today’s value and whether it is plausibly enough by the end of the term, not at optimistic growth.
• Age and term end. Interest-only that runs into retirement, or retirement interest-only (RIO), is a different product family with its own tests. See mortgage for older applicants.

Paths that often help

• Write the strategy down with numbers. What will repay the loan, roughly what it is worth now, when it becomes available, and what evidence backs it. “I’ll sort it nearer the time” is not a strategy a lender can assess.
• Consider part-and-part. Putting part of the loan on repayment shrinks the balance left at the end and can make the remaining interest-only slice easier to place, at a higher monthly cost than full interest-only.
• Look at repayment in full as a comparison. Running both figures through the mortgage calculator shows the monthly gap. Sometimes a longer repayment term closes more of that gap than people expect, subject to age and lender limits.
• If your term is ending soon, start early. Existing interest-only borrowers are often contacted by their lender ahead of term end. Talking options through well before the final year — extending, switching some or all to repayment, remortgaging, or planning a sale — usually leaves more room than waiting for the deadline.
• Keep other property separate on paper. If the plan is to sell a buy-to-let or second home, have its value, the mortgage on it and any likely tax on sale to hand. The amount that would actually be left after costs is what matters, not the gross price.

Want someone to look at your own situation? Send us the facts — a few lines is enough.

Mortgagability in plain terms

Mortgagability here means: will a lender offer interest-only on this loan size and LTV, at your income, with this repayment strategy and the evidence you can show? A lower monthly payment is the easy part to work out. Whether the plan for the balance at the end passes a lender’s rules is the real question, and it varies more from lender to lender than most repayment cases do.

Common mix-ups

“My house will be worth more by then” is not usually treated as a strategy on its own. Where sale of the home is accepted, lenders tend to work from today’s value and want enough left over to buy again, not a guess at future prices.

A pension pot is not the same as the tax-free lump sum you could take from it, and a lender may only count the part that would realistically be available at term end. Investments that rise and fall can be counted more cautiously than cash.

Interest-only on a buy-to-let is a different market with its own rental tests. This guide is about residential homes you live in.

A lower payment can free up money each month, but the full balance is still owed at the end. It is fair to ask whether the people who rely on the home would be protected if the plan fell short or income stopped. The protection gap analyser is an optional illustrative check only.

Next step

Put together the loan you want, the property value, your income, and the repayment strategy with its current value and paperwork. If you already have an interest-only mortgage, add the term end date and the outstanding balance. That pack usually moves the conversation on faster than asking whether interest-only is “still allowed”.