Side by side
| Lifetime mortgage | RIO mortgage | |
|---|---|---|
| Monthly payments | None required — interest rolls up | Mandatory monthly interest payment |
| Balance over time | Grows through compound interest | Stays flat — you never repay capital |
| Affordability assessment | None — no income test | Full affordability check on retirement income |
| Minimum age | Usually 55 | Usually 50–55, varies by lender |
| What happens if you cannot pay | Nothing — there is nothing to pay | Arrears, and ultimately repossession risk |
| How it ends | Death or move into long-term care | Death or move into long-term care |
| Effect on inheritance | Reduces it, potentially significantly | Preserves it apart from the original capital |
| No Negative Equity Guarantee | Yes on ERC-member plans | No — it is a standard mortgage |
What a RIO mortgage is
A retirement interest-only mortgage is an ordinary interest-only mortgage with no fixed end date. You borrow a capital sum, pay the interest every month for as long as you live in the home, and the capital is repaid when the property is sold — on death or a move into long-term care.
Because the interest is paid rather than added, the balance never grows. Borrow £80,000 and, thirty years later, your estate still owes £80,000. That is the entire appeal.
The price of that is an affordability test. A RIO is a regulated residential mortgage, so the lender must be satisfied your retirement income can sustain the payments indefinitely — including, for a couple, what happens to the household income if one of you dies and a pension falls.
The cost difference over time
Illustration. £80,000 borrowed at 6.0% at age 68.
Lifetime mortgage, no payments: nothing to find each month. After 20 years the balance is roughly £257,000 — around £177,000 of it interest.
RIO, interest paid monthly: about £400 a month, roughly £96,000 paid over 20 years. The balance stays at £80,000 throughout, so the estate repays £80,000.
Illustrative only, at a constant 6.0% and ignoring fees. Actual rates on the two products differ and your own figures will vary.
The RIO is clearly cheaper — but only if the payments are affordable for two decades. If a pension is lost, care costs arrive, or income simply fails to keep up with inflation, those payments become an obligation you cannot drop. A lifetime mortgage never becomes an obligation, which is precisely what some households are buying.
Which one fits
- ✔ You have a secure, index-linked pension income
- ✔ Preserving the inheritance is a priority
- ✔ The payments are comfortable, not marginal
- ✔ A surviving partner's income could still cover them
- ✔ You are converting an existing interest-only mortgage reaching its end
- ✔ Your income would not pass an affordability test
- ✔ You want the certainty of no monthly commitment
- ✔ You want flexibility to draw more later
- ✔ You value the No Negative Equity Guarantee
- ✔ Inheritance is a lower priority than income today
The middle option most people miss
An optional payment lifetime mortgage takes the useful half of each product. It is a lifetime mortgage, so there is no affordability test and no obligation to pay anything — but you may pay some or all of the interest each month if you want to, which slows or entirely stops the roll-up.
The decisive feature is that you can stop at any time without penalty. Pay the interest while your income allows and the balance behaves like a RIO; stop when it does not and it quietly reverts to rolling up. For households whose retirement income is adequate but not guaranteed, this often beats committing to either extreme.
The trade-off is that rates on lifetime mortgages are typically higher than on RIOs, so if you are certain the payments are affordable for the long run, the RIO usually wins on cost.
Other routes to consider first
- Downsizing — releases equity with no interest at all, if moving is acceptable
- A standard mortgage or later-life mortgage — if you are still earning, or the term can be repaid
- Pension drawdown — if you hold pension assets you have not yet accessed
- Unclaimed benefits — Pension Credit and Attendance Allowance go unclaimed by many eligible households
- Family support — a loan or gift from relatives who would otherwise inherit
A regulated adviser is required to consider these alternatives with you before recommending equity release.
Frequently asked questions
Related guides
A regulated adviser will test your income against a RIO and price a lifetime mortgage alongside it — no obligation.
Explore equity release →