Carrying a mortgage into retirement — why a RIO mortgage may serve you better than extending your term

The mortgage-into-retirement trend

UK Finance data shows that the number of mortgages with terms extending past state pension age has grown substantially over the past decade. Where a mortgage taken out in the 1990s would typically be structured to complete by age 65, mortgages taken out in the 2010s increasingly run to 70 or beyond — partly because buyers started later, partly because high house prices required longer terms to make monthly payments affordable.

Additionally, during the 2022–23 cost-of-living crisis, many homeowners who moved onto higher SVR rates or took new fixed deals requested term extensions to reduce their monthly payments. While this helped in the short term, it pushed the end date further into retirement.

The result is a significant cohort of homeowners in their late 50s and 60s who will still be making mortgage repayments well into their 70s — at a time when retirement income typically falls and healthcare costs rise. Carrying a capital-and-interest mortgage repayment on a fixed retirement income can be a significant financial strain.

What a term extension from your existing lender actually does

Extending your existing mortgage term is the path of least resistance — your existing lender can often process it without a full affordability assessment. But it has real costs that are easy to underestimate:

• More total interest paid. Extending from a 20-year term to a 30-year term means ten more years of interest payments on the outstanding capital. On a £150,000 mortgage at 5%, that is roughly £75,000 in additional interest over the life of the loan.
• Still a fixed-term product. An extended term mortgage still has an end date — at which point the capital must be repaid. If you extend to age 80, you still face the same repayment question at 80 that you face now. Unless your retirement plans include selling, downsizing, or a pension lump sum that will cover the balance, you are simply kicking the problem down the road.
• Age caps from lenders. Many high-street lenders will not extend mortgage terms past age 75 or 80, and some have lower limits. The older you are when requesting the extension, the fewer options you may have.

How a Retirement Interest-Only mortgage compares

A Retirement Interest-Only (RIO) mortgage replaces your existing mortgage with a product that has no fixed end date. You pay only the interest each month — keeping the outstanding balance flat — and the capital is repaid from the sale of the property when you die or enter long-term care. There is no maturity date, no repayment cliff, and no need to plan a capital repayment strategy.

For a homeowner with an existing capital-and-interest mortgage of £150,000 at 5.5% with 15 years remaining, the monthly repayment is approximately £1,225. Switching to a RIO at a comparable rate, the monthly interest payment would be approximately £688 — freeing up around £537 per month in retirement cash flow. The trade-off is that the £150,000 capital balance does not reduce over time (it remains as a liability against the property), but the property's equity still exists and will be realised on eventual sale.

Whether a RIO or term extension is more appropriate depends on your specific balance, rate, income, equity position, and long-term plans. A Verity Home adviser can model both scenarios with your actual numbers and help you make a properly informed choice.

What you need to qualify for a RIO

RIO mortgages are assessed on the basis of affordability of the monthly interest payment — not on a full repayment basis. This typically makes them accessible to homeowners whose income (pension, state pension, rental income) is sufficient to service the interest comfortably. The FCA requires lenders to assess affordability carefully, but the test is genuinely about whether you can afford the monthly interest — not about whether you can repay the capital during your lifetime.

Minimum age for most RIO products is 55. The property must be your primary residence. Most lenders require a minimum property value and a minimum loan amount. An independent valuation will be required. Legal advice — to ensure you understand the product independent of the adviser — is mandatory.

If an existing mortgage is being replaced, the RIO proceeds are used to repay it at completion. The net result is a lower monthly payment and the removal of the term-end repayment risk.