Retirement interest-only mortgage vs equity release: with a RIO you pay the interest monthly; a lifetime mortgage usually lets it roll up and grow.
That one difference shapes the affordability checks, the risk to your home and what your family inherits. Below, the two are set side by side from MoneyHelper, the free and impartial money guidance service, and the FCA's rules. Which fits turns on your income in later life and what you hope to leave, and the form on this page puts those questions to a qualified equity release adviser.
What each one is
MoneyHelper describes a retirement interest-only (RIO) mortgage as "a special type of home loan if you’re an older borrower (over 50) whose needs aren’t met by a standard mortgage." It adds that "Lenders set their own rules on who can apply for a retirement interest-only mortgage."
Equity release comes in two forms; the one that compares with a RIO is the lifetime mortgage. The Equity Release Council, a voluntary trade body, says a lifetime mortgage "does not require monthly repayments" and that "interest on the loan is rolled up (compounded)". A home reversion plan, where you sell all or part of the home, is the other option; our guide to equity release in the UK covers both. An interest-only lifetime mortgage is different again: paying the interest is optional.
Monthly interest or roll-up: the two side by side
| Retirement interest-only mortgage | Roll-up lifetime mortgage | |
|---|---|---|
| Monthly payments | You pay the interest each month | None required; interest is added to the loan |
| Affordability | The lender must assess it | MoneyHelper says there is no affordability assessment |
| The debt | No compound interest, says MoneyHelper | Grows as interest compounds |
| Repaid when | Usually when the home is sold, on death or a move into long-term care; some have a set term | When you die or go into long-term care; for a couple, once both have |
| Left to pass on | More likely to leave something, says MoneyHelper | Only what remains once the loan and interest are repaid |
| Adviser | Need not hold an equity release qualification | A qualified equity release adviser is needed |
MoneyHelper puts the contrast directly: "With a RIO mortgage, you pay the interest each month. With a roll-up lifetime mortgage, you don't have to make monthly payments, so the interest can build up and increase what you owe." It also cautions that a lifetime mortgage can carry a higher rate than an ordinary mortgage, so what you owe can climb fast; equity release rates and equity release fees cover the cost.
Affordability checks, and what happens if you cannot pay
A RIO is a regulated mortgage, so the FCA's general affordability rule (MCOB 11.6.2 R) applies: before lending, the firm must check whether the borrower "will be able to pay the sums due". FCA guidance names RIOs twice: with joint borrowers, the lender "should consider the ability of a single borrower to continue making the required payments if the other dies" (MCOB 11.6.15 G), and selling the home can be an acceptable way to repay the capital (MCOB 11.6.45 G). MoneyHelper adds that you must "prove you can afford the monthly interest repayments, now and after retirement", and that switching lender or borrowing more may mean a fresh assessment.
Roll-up lending sits outside that test: the rule does "not apply in relation to an interest roll-up mortgage" (MCOB 11.6.57 R), and a lifetime mortgage is the first of the cases in which a lender may offer one.
The catch is that a RIO puts your home at risk if the payments stop; if paying gets hard, MoneyHelper says to "talk to your mortgage lender about your options as soon as possible". Under MCOB 13.3.2A R a lender dealing with someone in payment difficulty must "make reasonable efforts to reach an agreement with a customer" over the shortfall and must "not repossess the property unless all other reasonable attempts to resolve the position have failed." A roll-up plan has no monthly payment to miss, but the debt grows instead.
Whether you could keep paying if your income fell is a question to test on your own figures; an adviser qualified in equity release can go through it with you, and the form on this page leads to that conversation.
Death, long-term care and what you leave
For both products the home is usually where repayment comes from. MoneyHelper says a RIO is "similar to a lifetime mortgage where the loan is usually only paid off when you sell the house, die or move into long-term care". But "Some RIO mortgages do state a set time to repay the money", and if you are still in the home then, "you will need to repay the loan at that point." On a couple's lifetime mortgage, the Council says nothing is repaid while either partner still lives there.
Because a RIO's balance does not grow, MoneyHelper sees a better chance of leaving an inheritance; with a lifetime mortgage your heirs receive what is left once the rolled-up debt is cleared (how equity release affects inheritance). A lifetime mortgage can also reduce means-tested benefits and help such as Council Tax reductions (equity release and benefits), and ending it early may bring an early repayment charge (repaying equity release early). The UK equity release guide covers each of these, and is equity release a good idea? and alternatives to equity release the wider weighing-up.
Advice, safeguards and Scotland
Advice rules differ. MoneyHelper says "You must speak to a qualified equity release adviser to get a lifetime mortgage", whereas advisers helping you find a RIO, it says, "don’t need to have an equity release qualification". The Council's standards bind its members, not every firm; under them customers "need to receive independent legal advice." Members' lifetime mortgages let you stay for life or until a permanent move into care, while the home remains your main residence and you keep to the terms. And provided the home fetches the best price reasonably obtainable and the loan conditions were met, neither you nor your estate owes more than its value, less reasonable selling costs (the Council's standards in full).
If someone contacts you out of the blue about borrowing against your home, the FCA's advice is: "Treat all unexpected calls, emails and text messages with caution." How to find and check an adviser explains the checks. In Scotland, either loan would take the form of a standard security, the only way the Conveyancing and Feudal Reform (Scotland) Act 1970 allows a debt to be secured over land.
Questions people ask
Is a retirement interest-only mortgage the same as equity release?
No. MoneyHelper presents a retirement interest-only mortgage as an alternative to equity release: you pay the interest each month and, in its words, "you don’t have the risk of compound interest." The lifetime mortgage is the equity release product it is usually compared with.
Which suits an older homeowner better?
Neither is better in general. MoneyHelper suggests a RIO is worth considering by someone who can keep up monthly payments, and notes it may let you borrow a larger share of your home's value; a lifetime mortgage asks for no payments and no affordability test, at the cost of a growing debt. The balance turns on your income in later years and what you want to leave.
Can I move from a RIO to a lifetime mortgage?
MoneyHelper says that if a RIO's payments become a struggle you "might be able to change to a lifetime mortgage where you can opt out of monthly repayments", though compound interest makes that dearer over time. Taking out the lifetime mortgage would mean speaking to a qualified equity release adviser.
Next step
Monthly interest or roll-up comes down to your income, home and family. A few lines about your situation, sent through the form on this page, let a qualified equity release adviser ring to talk it over, at no cost; MoneyHelper's guidance stays free to use too.
Sources: MoneyHelper, Retirement interest-only (RIO) mortgage (archived 7 October 2025); MoneyHelper, What is equity release? (archived 19 September 2026); Equity Release Council, Professional Standards & Guarantees and What is equity release?; FCA Handbook, MCOB 11.6; MCOB 13.3 and 13.1; FCA, Protect yourself from scams; Conveyancing and Feudal Reform (Scotland) Act 1970, s. 9. All accessed 18 October 2026.