What Happens When Your Interest-Only Mortgage Ends?

Hundreds of thousands of interest-only mortgages taken out in the late 1990s and 2000s are now reaching the end of their terms, and a lot of the people holding them are discovering that the repayment plan they had in mind, an endowment, an investment, a future property sale, has not quite delivered what was expected. If you have had a letter from your lender reminding you that your term is ending and the balance is due, this guide explains what actually happens next and what your realistic options are.

The first thing to say is that you have more options than you might think, but the earlier you act, the more of them are available. At Drummonds Finance Group we help borrowers in exactly this position, and the difference between starting two years before the term ends and two months before is enormous.

What the lender expects at the end of the term

With an interest-only mortgage, your monthly payments have only covered the interest. On the final day of the term, the original capital, the full amount you borrowed, becomes repayable in one lump sum. The lender will write to you in the years and months leading up to that date asking how you intend to repay.

If the term ends and the balance is not repaid, the debt does not disappear. Interest usually continues to accrue, the lender will press for a resolution, and ultimately a lender can seek possession of the property to recover what is owed. In practice, lenders would much rather agree a workable plan than repossess, and regulators expect them to treat borrowers in this position fairly. But their patience is not indefinite, and hoping the letter goes away is the one strategy that reliably fails.

Option one: repay from your intended vehicle

If your endowment, ISA, pension lump sum or other investment covers the balance, the process is simple. If it covers most of it, you may be able to repay the majority and remortgage the shortfall, which is often a very manageable loan. A £30,000 shortfall on a £250,000 property with strong pension income is, frankly, an easy case. It is worth getting up-to-date valuations of any repayment vehicles well before the end date so you know the size of any gap early.

Option two: remortgage onto a new deal

Age is not the barrier it used to be. Plenty of lenders now lend to older borrowers, some with no maximum age at all, and a remortgage onto a new term can work in several forms. Some borrowers switch to full repayment over a new term, which clears the debt but raises the monthly payment considerably. Others take a part-and-part arrangement, repaying some capital while keeping payments manageable. Affordability in retirement is assessed on pension and investment income, and lenders are far more flexible on this than most people expect.

Our page on mortgage age limits and over 60s lending covers how different lenders approach age, and our post on whether it is ever too late to get a mortgage tackles the myths directly. If you would like a feel for what a repayment or part-and-part arrangement would cost each month over different terms, our mortgage calculator is a useful starting point before we refine the numbers together.

One nuance worth knowing: if you want to stay with your existing lender, a straightforward product switch may be on the table too, and it is always worth comparing that against the wider market. Our page on product transfers versus remortgaging explains the trade-off between convenience and cost.

Option three: a retirement interest-only mortgage

A retirement interest-only mortgage, usually shortened to RIO, is designed for precisely this situation. You continue paying interest each month, just as you have been, but there is no fixed end date. The capital is repaid when the property is sold, typically on death or a move into long-term care. Affordability is assessed on your retirement income, and because you are servicing the interest, the debt does not grow. For borrowers with reliable pension income who want to stay in their home, a RIO is often the most natural successor to a maturing interest-only loan.

Option four: downsize

Selling and buying somewhere smaller clears the mortgage and can release equity on top. It is the right answer for some households and the wrong one for others, and the true costs of moving, stamp duty, estate agency and legal fees among them, belong in the comparison against remortgaging and staying put. Our guide to stamp duty in 2026 gives worked examples so you can put a real figure on that part of the move, and our moving home team can handle the mortgage side if a small loan is still needed on the onward purchase.

Option five: equity release

Lifetime mortgages can repay a maturing interest-only balance without monthly payments, with the interest rolling up against the property instead. For some borrowers this is appropriate, but the compounding interest erodes equity over time and it is a decision that needs specialist advice, careful comparison against a RIO, and usually a family conversation. It should be a considered choice, not a default.

How to compare the routes

The right answer usually falls out of three questions. What income will you have through retirement, and how reliable is it? How important is preserving equity, whether for inheritance or later-life care costs? And how attached are you to the property itself? High income and a wish to stay put point towards a RIO or a new term. Thin income but plenty of equity points towards downsizing or, with care, equity release. A shortfall rather than a full balance points towards a simple part repayment and remortgage. Laying the options side by side with real figures, rather than in the abstract, is where the decision usually makes itself.

Frequently asked questions

Can my lender extend my interest-only term? Some will grant short extensions, particularly where a property sale is already in progress, but extensions are a bridge rather than a solution and are entirely at the lender's discretion.

Can I get a new interest-only mortgage in my sixties or seventies? Potentially yes. Standard interest-only deals need a credible repayment strategy, while RIO mortgages need affordable interest payments from retirement income. Different lenders draw these lines differently.

Will I be credit-checked for a RIO? Yes, it is a normal regulated mortgage application, with affordability assessed on pension and investment income.

What happens if I do nothing? The balance falls due, interest and pressure mount, and the lender can ultimately pursue possession. Engaging early, with the lender and with advice, always produces better outcomes.

The practical next step

If your interest-only term ends within the next five years, now is the time to look at it. We will review your balance, your property value, your income and any repayment vehicles, then compare the realistic routes side by side, whether that is a new term, a RIO, part repayment or something else across the whole market. If your current lender has already written to you, do respond to them, and feel free to get in touch with us on 0330 1330034 before agreeing to anything, so you know what the wider market would offer you first.