Last reviewed: June 2026
TL;DR- A retirement interest only (RIO) mortgage requires monthly interest payments but no capital repayment - the loan is repaid from the property sale when the borrower dies or moves into care.
- Unlike a standard interest only mortgage, there is no defined term and no repayment vehicle requirement - the end date is the borrower's death or move to care.
- Unlike a lifetime mortgage, interest is paid monthly rather than rolled up, so the outstanding balance stays constant.
- FCA regulation changed in 2018 to make RIO mortgages more accessible by removing the repayment vehicle assessment requirement.
What Is a Retirement Interest Only Mortgage?
A retirement interest only (RIO) mortgage is a mortgage for older borrowers where monthly interest payments are made but no capital is repaid during the life of the loan. The outstanding balance remains constant throughout. The loan is repaid in full when a defined life event occurs: the borrower's death, the sale of the property, or the borrower moving permanently into long-term care.
RIO mortgages were formally introduced as a product category by the FCA in March 2018, when regulatory changes removed them from the standard interest only mortgage framework. This change eliminated the requirement for a credible repayment vehicle (which many older borrowers could not evidence) and made RIO mortgages accessible to borrowers who could afford the monthly interest but not a full repayment mortgage.
How RIO Differs from Standard Interest Only
A standard interest only mortgage requires a defined repayment vehicle (ISA, pension, investment portfolio) to repay the capital at the end of the term. It also has a defined term - typically 25 years. A RIO mortgage has no defined term and no repayment vehicle requirement. The loan runs for the borrower's lifetime (or until they move to care or sell). The lender's security is the property value at the point of eventual sale rather than a separately identified repayment fund.
How RIO Differs from a Lifetime Mortgage
A lifetime mortgage (equity release) typically has no monthly payment requirement - interest rolls up and compounds. A RIO mortgage requires monthly interest payments, which keeps the balance stable and prevents compounding. This means the RIO borrower retains the full equity in the property (less the original loan amount) throughout the mortgage, while a lifetime mortgage borrower's equity is progressively eroded by compounding interest. The RIO borrower must be able to afford the monthly interest payments from pension or other retirement income.
Eligibility and Affordability Assessment
RIO mortgage lenders assess affordability based on the borrower's retirement income - typically pension income, rental income or other regular receipts. The FCA's 2018 guidance established that for RIO mortgages, the repayment of the capital (at the life event) does not need to be assessed - only the affordability of the monthly interest payments. This makes RIO mortgages accessible to borrowers with modest but stable retirement income who would not qualify for a standard repayment mortgage due to income level or age.
Minimum age requirements are typically 55, with most providers requiring the borrower to be in or approaching retirement. The loan-to-value available varies by age and property value.
Frequently Asked Questions
What income counts toward RIO mortgage affordability?
Lenders assess income that is regular, reliable and expected to continue for the life of the mortgage. Qualifying income typically includes: state pension; occupational and personal pension income; annuity payments; rental income from buy-to-let properties; and in some cases, investment income or benefits. PAYE employment income may be included but must be assessed against the prospect of continued employment in later life. Each lender has specific criteria for which income types it accepts and how they are evidenced.
Can two people take a joint RIO mortgage?
Yes. Joint RIO mortgages are available from most RIO lenders. The mortgage continues until both borrowers have died or moved permanently into care. The affordability assessment uses the joint income of both borrowers. Where one borrower predeceases the other, the surviving borrower continues in the property and continues making the monthly interest payments.
Can I make capital repayments on a RIO mortgage?
Most RIO mortgages allow voluntary capital overpayments within defined limits, which reduces the outstanding balance. This can increase the equity available for beneficiaries or for the borrower's own use in the future. Some RIO products allow unlimited overpayments; others impose limits similar to standard mortgage products. The specific overpayment terms should be checked with the lender.
Is a RIO mortgage regulated by the FCA?
Yes. RIO mortgages are regulated by the FCA as a variant of regulated mortgage contract under MCOB rules, following the 2018 regulatory change. The FCA conduct protections applicable to standard residential mortgages apply to RIO mortgages. Borrowers are entitled to the same information, advice and complaint protections as with any other FCA-regulated mortgage product.
