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What “the interest rolls up” actually looks like

With a lifetime mortgage there is nothing to pay each month unless you choose to, so the interest is added to the debt and then charged on the larger amount. This shows what that does over thirty years, and the four things that change it.

Everybody nods at that phrase. Almost nobody pictures the number. Here it is, worked out, so you can look at it before you decide anything.

Equity release may involve a lifetime mortgage, secured against your property, or a home reversion plan. It will reduce the value of your estate and impact funding long-term care.

How this page is kept
Written by
Equity Release Facts editorial
Last checked
6 September 2026
Next review
6 March 2027

£50,000 borrowed, nothing repaid

With a lifetime mortgage there is nothing to pay each month unless you choose to. The interest is added to what you owe, and then next year’s interest is charged on that larger amount as well. That is all “rolling up” means, and this is what it does.

An illustration, not a quote and not our verified rate. It is used because it is close to where the market floor has been sitting. Your rate depends on your age, your property, how much you borrow against its value and which product you are placed on, and it will not be this number.

The arithmetic is ours and you can check it: each row is £50,000 multiplied by 6.2% compounded for that many years.

An illustration at 6.2% on £50,000, with no payments made. Not a quote, not our verified rate, and not a projection of your own plan. The shading behind each row is proportional to the amount owed, so the widest row is the largest debt and not the longest wait.
After You would owe Times
day one £50,000 1.00
5 years £67,545 1.35
10 years £91,246 1.82
15 years £123,264 2.47
20 years £166,518 3.33
25 years £224,948 4.50
30 years £303,882 6.08

How long the debt takes to double

A rate a little under two points higher takes four years off the doubling time. That is why the difference between two quotes matters far more here than it would on a mortgage you were paying down.

On a repayment mortgage a slightly higher rate costs you a little more each month. Here it changes what your family inherits, because nothing is being paid off in between.

5% doubles in 14.2 years
6.2% doubles in 11.5 years
7% doubles in 10.2 years

Four things that change those numbers

The tables above assume the worst version: the full amount, taken on day one, with nothing paid. Most of that is a choice rather than a feature of the product.

Paying the interest, or some of it

Most plans allow voluntary payments. Paying the interest each month stops the debt growing at all: it stays at what you borrowed. Paying part of it slows the growth rather than stopping it. Both are optional, and the Equity Release Council requires a plan to allow them within stated limits.

Taking less than the maximum

The maximum is rarely the right answer. Half the money compounds to half the debt, and the maximum figure on a calculator is a ceiling rather than a recommendation.

Drawing it down in stages

On a drawdown plan you take an initial amount and leave the rest in a reserve. Interest is only charged on what you have actually taken, so money you have not needed yet is not compounding.

How long the plan runs

The one thing nobody controls, and the one that matters most. The tables above are the same arithmetic at every age; what differs is how many rows of them you live through.

What the guarantee does, and does not, cover

None of this can leave your estate owing more than the property sells for. That is what the no-negative-equity guarantee does, and it is a condition of Equity Release Council membership. What it does not do is protect what is left over: the guarantee caps the debt at the value of the house, and the difference between those two things is your inheritance.

What we are not telling you

Whether any of this is too much. That is not a judgement a page can make: it depends on what the money is for, what else you have, and what you want to leave behind. Some people look at the twenty-year row and stop. Others look at it and decide it is worth it. Both are reasonable.

What we would say is this: an adviser has to give you an illustration with these exact figures on your actual rate. Ask for it, read the table, and take it home before you decide.

Worth knowing

Equity release requires repaying any existing mortgage. Money released, plus accrued interest, would need to be repaid upon death or moving into long-term care.

Where this comes from
  1. 01 Equity Release Facts · opened 6 September 2026 Our own arithmetic, shown on the page so you can check it Each row is the amount borrowed compounded at the illustrative rate for that many years. Compound interest needs no citation: it needs showing, which is what the tables do.
  2. 02 Equity Release Council · opened 6 September 2026 Standards: the no-negative-equity guarantee (Equity Release Council) Their standard requires that "the borrower or estate will never owe more than the property is worth, after deduction of reasonable sales costs".

Questions worth asking

All four are for an adviser, and all four have a number for an answer.

  1. 01

    What would I owe at year ten, fifteen and twenty on the actual rate I am offered?

    Ask for the figures, not the rate. An adviser must give you an illustration showing exactly this, and it is the single most useful page of the whole document.

  2. 02

    What voluntary payments does this plan allow, and up to how much?

    Paying the interest stops the debt growing. The limits are set by the product and they differ.

  3. 03

    Would drawdown suit me better than taking it all at once?

    If you do not need all of it now, the part you leave behind is not compounding. There is usually a trade-off in the rate.

  4. 04

    What happens to the figures if I take less?

    Worth asking explicitly. Advisers can model it and the difference over twenty years is larger than most people expect.

Read next

What has changed on this page
  1. First publication. The growth and doubling figures were computed rather than estimated; recompute them if the illustrative rate ever changes.
How this page is kept
Written by
Equity Release Facts editorial
Last checked
6 September 2026
Next review
6 March 2027
Checked 10 September 2026
[6.20%]lowest lump sum rate, fixed for life[lender rate sheets] [6.44%]lowest drawdown rate[lender rate sheets] 43.5%most you could release at 70LTV schedule, July 2026 54%most you could release at 80 or overLTV schedule, July 2026 55Legal & General's youngest applicantL&G lending criteria, 6 September 2026 £0to pay each month unless you choose tosubject to lender terms [6 to 8 weeks]typical time from application to money £70,000Legal & General's minimum for a houseL&G lending criteria, 6 September 2026

Questions people ask about this

Short answers to the things that come up most. None of it is advice, and every figure on this page carries its source.

What does roll-up actually mean?

Interest is added to what you owe rather than paid, so the following year interest is charged on the interest as well. That is why the debt grows faster the longer the plan runs.

What is the biggest thing I can do about it?

Pay the interest, or some of it. Most plans allow voluntary payments, and paying the interest each month stops the debt growing at all: it stays at what you borrowed. Paying part of it slows the growth rather than stopping it.

Does taking less make a difference?

Directly. Half the money compounds to half the debt. The maximum figure on a calculator is a ceiling rather than a recommendation, and the maximum is rarely the right answer.

What is a drawdown plan?

You take an initial amount and leave the rest in a reserve. Interest is only charged on what you have actually taken, so money you have not needed yet is not compounding.

Can the debt ever exceed what the house is worth?

Not where the plan carries a no-negative-equity guarantee, which is a condition of Equity Release Council membership. Whatever the debt has grown to, it cannot exceed what the property sells for, so no debt passes to your family.

Worth knowing

Equity release may involve a lifetime mortgage, secured against your property, or a home reversion plan. It will reduce the value of your estate and impact funding long-term care.

Talk it through with an adviser

Takes about two minutesFree, no obligation, and nothing committed

One qualified equity release adviser. They will go through your figures and tell you if there is a better answer. It costs nothing and commits you to nothing.

Advice is required to proceed with equity release and there may be other options which better suit your circumstances. Only if your case completes would an advice fee be payable, and the adviser will tell you what theirs is before you commit to anything. Other lender and solicitor fees may apply.

We pass your details to one adviser and nobody else.