Retirement Interest-Only Mortgage Rates: Fixed, Variable and What Affects Them
Written and reviewed by the Later Life editorial teamUpdated 4 min read
Retirement interest-only mortgage rates can be fixed for a set period or variable. The rate you are offered depends on the lender, the deal you choose and how much you borrow compared with your home's value. Because a retirement interest-only (RIO) mortgage payment is all interest, the rate directly sets what you pay each month.
This page does not quote current rates. Rates change often and vary between lenders, so an adviser or lender can tell you what is available now. For how the product works, see our guide to the retirement interest-only mortgage. We do not provide financial advice.
Why the rate matters so much on a RIO mortgage
With a repayment mortgage, part of each payment reduces the loan. With a RIO mortgage, the whole payment is interest. So any change in the rate passes straight into your monthly payment, and there is no end date after which the payments stop, other than the end of the mortgage itself.
That is why lenders test whether the payment would stay affordable if rates rose. Our guide to RIO affordability calculations explains how this is done.
Fixed and variable retirement interest-only mortgage rates
Fixed rates
A fixed rate stays the same for the length of the deal, so your payment does too, whatever happens to wider interest rates. That can make budgeting easier. When the deal ends, the rate usually moves to the lender's standard variable rate unless a new deal is arranged. MoneyHelper notes that this rate is often higher.
The trade-offs are that you do not benefit if rates fall during the fixed period. Early repayment charges may also apply if you repay or switch during the deal.
Variable rates
A variable rate can go up or down during the deal. There are three main kinds:
- Tracker rates follow another rate, usually the Bank of England base rate, plus a set margin. If the base rate rises, the tracker rises by the same amount.
- Standard variable rates are set by the lender. They usually follow base rate changes, but not always by the same amount.
- Discounted rates are set a certain amount below the lender's standard variable rate for a limited time.
Variable rates can mean lower payments when rates fall, but higher payments when they rise. On a RIO mortgage, where the payment can continue for life, that uncertainty can matter more.
Questions to think about
There is no single right choice. It may help to consider:
- how much your budget could absorb if your payment rose;
- how much you value knowing your payment in advance;
- whether you might sell, move or repay during the deal;
- what happens, and what it costs, when the deal ends.
What affects the rate you are offered
Each lender prices its RIO mortgages in its own way. Common influences include:
- The wider interest rate market. The Bank of England base rate and lenders' own funding costs affect the rates on offer, especially for new deals.
- Loan-to-value. This is the loan as a percentage of your home's value. MoneyHelper notes that, for mortgages generally, rates often depend on loan-to-value, with lower bands usually cheaper. RIO lenders set their own bands. For context, MoneyHelper says a RIO mortgage may allow you to borrow up to 50-60% of your home's value at age 50, so where your loan sits within that range can matter.
- The type and length of the deal. Fixed and variable deals, and fixes of different lengths, are priced differently.
- Fees. A lower rate may come with a higher arrangement fee, and the reverse. The cheaper deal depends on the loan size and how long you keep it.
- Your property and circumstances. Lenders apply their own criteria to the property and to you. These can affect which products you are offered.
Comparing rates fairly
The headline rate is only part of the cost. When you receive a mortgage illustration, known as the ESIS (European Standardised Information Sheet), it shows the annual percentage rate of charge (APRC). This combines the interest rate with certain fees to give an overall cost figure, which can help when comparing deals.
It also helps to compare the early repayment charges, whether the mortgage can move with you if you sell, and what rate applies when the deal ends. Our post on retirement interest-only mortgage pros and cons looks at the wider risks of changing rates.
If rates make the payments hard to plan for
If you are unsure you could manage higher payments later in life, it may be worth understanding the alternatives. Equity release usually has no monthly payments, but interest is added to the loan and the debt grows. Downsizing avoids borrowing altogether, although moving has its own costs. Each option affects your home and estate differently.
Not sure where to start?
An FCA-regulated mortgage adviser can show you the current retirement interest-only mortgage rates available to you, explain fixed and variable options, and compare the total cost of different deals. MoneyHelper offers free guidance on mortgages and interest rates. We do not provide financial advice.
Frequently asked questions
Can I switch to a new rate on my existing RIO mortgage?
It may be possible. MoneyHelper explains that for mortgages generally, a current lender may offer a new deal when an introductory deal ends, called a product transfer. Moving to another lender, known as remortgaging, usually means fresh checks and new fees. Early repayment charges on the current deal can apply. Whether RIO lenders offer product transfers varies, and an adviser can compare staying with moving.
What happens to my rate when a RIO fixed deal ends?
The rate usually moves to another rate set out in your mortgage offer, often the lender's standard variable rate, unless you arrange a new deal. MoneyHelper notes this rate is often higher. Your lender or adviser can tell you what products are available as the end date approaches, and whether any fees or checks apply to switching.
Does the Bank of England base rate affect my RIO mortgage?
It depends on the type of rate. A tracker rate moves directly with the base rate. A standard variable rate is set by the lender and often moves with it, but not always by the same amount. A fixed rate is not affected until the fixed period ends, although base rate changes can affect the new deals available then.
Can borrowing less lower my RIO mortgage rate?
Sometimes. MoneyHelper explains that, for mortgages generally, the interest rate often depends on the loan-to-value, which is the loan as a percentage of the home's value, with lower loan-to-value deals usually cheaper. Whether a RIO lender prices this way varies. Borrowing less also reduces the monthly interest itself. An adviser can show whether a smaller loan would change the rate offered.
What is the APRC on a RIO mortgage illustration?
The APRC, or annual percentage rate of charge, combines the interest rate with certain fees to show the overall cost of the loan on a comparable basis. It appears in the mortgage illustration, known as the ESIS. It can help when comparing deals with different fees, but it assumes the rate and terms stay as set out in the illustration.
