The Interest Only Mortgage Trap: Are You Stuck — and What Can You Do?

How did we get here?

From the 1980s through to the early 2010s, interest only mortgages were widely sold across the UK. The premise was straightforward: pay only the interest each month — keeping payments low — and repay the capital at the end of the term using a separate savings vehicle. Endowment policies were the most common vehicle, alongside ISAs, pensions, and in many cases simply the anticipated sale of the property.

In theory, this worked. In practice, a great many of these repayment vehicles failed to deliver. Endowment policies — sold aggressively through the 1980s and 90s — routinely underperformed their projections. Many homeowners cashed them in early. Others were told their mortgage came with a built-in repayment plan when it did not. And a significant number simply never gave serious thought to what would happen at the end of the term.

The result is what the industry now calls the interest only mortgage time bomb: an estimated 1.5 million UK homeowners who still have interest only mortgages, many of them now in their 50s, 60s, or 70s, approaching the end of their term with the full capital balance outstanding.

What actually happens when the term ends?

When an interest only mortgage reaches its end date, the lender expects full repayment of the outstanding capital in one lump sum. If you cannot pay it — and you have no repayment vehicle to do so — the lender will look to repossess and sell the property to recover the debt.

This is not an immediate or automatic process. Lenders are required to treat borrowers fairly and will typically contact you in the years before the term ends to discuss your repayment plan. The FCA has been clear that lenders must explore all options before initiating possession proceedings.

But make no mistake: if you reach the end of your term without a plan and without the ability to repay, your home is at risk. The time to act is now — not in the final months.

Signs you might be in the interest only trap

Many people in this situation are not entirely sure where they stand. Here are the signs to look out for:

• You are paying a mortgage but your balance never goes down
• You had an endowment policy that has matured or been cashed in — and the proceeds will not cover the mortgage balance
• Your mortgage term ends within the next 5–10 years and you do not have a confirmed repayment plan
• Your lender has written to you asking about your repayment strategy
• You planned to sell the property but that no longer feels like the right option
• You are approaching or in retirement with a significant mortgage balance still outstanding

Solution 1: Remortgage to a repayment mortgage

If you still have time remaining on your mortgage and can afford higher monthly payments, the cleanest solution is to switch from interest only to a full capital repayment mortgage. Your monthly payment will increase — because you are now paying off the loan as well as the interest — but at the end of the new term, you own the property outright with no balance remaining.

The key question is affordability. Lenders will assess your income (including pension income if you are retired or close to retirement) and calculate whether you can service the higher repayment amount. Many people who assume they cannot afford repayment are surprised to find that a competitive rate over a longer term brings monthly payments to a manageable level.

We search over 90 lenders to find the most competitive repayment deal for your circumstances — including lenders who are more flexible on age at end of term and who accept retirement income.

Solution 2: Part repayment, part interest only

If switching entirely to repayment would increase your monthly payments beyond what you can comfortably afford, a split mortgage may be the answer. Many lenders allow you to put part of your balance on repayment and keep part on interest only.

This reduces the capital outstanding more slowly than a full repayment mortgage, but it lowers the final balloon payment you need to find at the end of the term. Combined with a realistic plan to pay off the remaining interest-only portion (through savings, a planned downsize, or later life lending), this can be an effective middle ground.

Solution 3: Retirement interest-only mortgage (RIO)

A retirement interest-only mortgage is specifically designed for older borrowers. Like a standard interest-only mortgage, you pay the interest each month and the balance stays the same. The crucial difference is that there is no fixed end date — the loan runs indefinitely and is only repaid when you die, sell the property, or move into long-term care.

RIO mortgages became a regulated product in 2018 and are now available from a growing number of lenders. They are assessed primarily on your retirement income — state pension, private pension, investment income — rather than your age. If your income can comfortably cover the monthly interest, a RIO can effectively resolve an interest only maturity problem without increasing your outgoings.

They are an excellent solution for homeowners who are asset-rich (significant equity in the property) but income-modest in retirement.

Solution 4: Equity release (referred to specialists)

For homeowners who have significant equity in their property and want to eliminate monthly mortgage payments entirely, a lifetime mortgage — the most common form of equity release — can pay off the outstanding interest only balance in full.

With a lifetime mortgage, you borrow against your property with no monthly repayments required. Interest rolls up and the whole amount (original loan plus accumulated interest) is repaid from the sale of the property when you die or move into long-term care. Modern lifetime mortgages from Equity Release Council members come with a no-negative-equity guarantee.

We are not currently authorised to advise on equity release directly — this requires a specialist qualification beyond a standard CeMAP. We refer clients to fully qualified equity release specialists we trust. If you enquire with us and equity release looks like the right solution, we will make a warm introduction and stay involved throughout.

What your lender is likely to say — and what to do if they say no

If you contact your existing lender about your interest only situation, they are obligated to explore options with you. However, they can only offer their own products — and their criteria may not suit your circumstances. Age restrictions, income requirements, or simply a lack of suitable products on their shelf can result in a dead end.

This is where an independent broker adds real value. We know which lenders are most flexible for older borrowers, which ones accept pension income generously, and which ones will lend to higher ages at end of term than the mainstream banks. Many of our clients have found solutions after being told by their existing lender that there was nothing that could be done.

Do not accept a refusal from your current lender as the final word.

How much time do you have — and why it matters

The single most important factor in how many options are available to you is how much time remains before your mortgage term ends.

• 5+ years remaining: the full range of solutions is available, including longer repayment terms, RIO mortgages, and careful planning
• 2–5 years remaining: most options are still available, but the term on a repayment mortgage may need to be longer to keep payments manageable
• 1–2 years remaining: options are becoming limited; urgent action needed — lender contact is likely already underway
• Less than 12 months: crisis territory; specialist broker support essential; equity release or RIO may be the fastest route