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SenseCalc
Updated 6 April 2026

Lifetime Mortgage Calculator · Free UK 2026

See how interest rolls up over 5, 10, 15, and 20 years, or calculate monthly interest-only payments. No personal details required.

✓ Free to use✓ Roll-up & interest-only✓ 5–20 year projections✓ Instant results

Lifetime Mortgage Calculator

Enter loan amount and rate, see roll-up balance or interest-only payment instantly

£
%

Balance after 10 years

£170,814.45

Starting from £100,000.00 at 5.5% AER, no monthly payments

Original loan

£100,000.00

Balance after 5 years

£130,696.00

Balance after 10 years

£170,814.45

Balance after 15 years

£223,247.65

Balance after 20 years

£291,775.75

Projections are illustrative only, not financial advice. Rates and terms vary by lender. Seek independent FCA-regulated advice before taking a lifetime mortgage.

How Lifetime Mortgages Work

Quick Answer: A lifetime mortgage is a loan secured against your home with no mandatory monthly repayments. Interest compounds and the balance is repaid when you die or move into long-term care. At 5.5% AER, a £100,000 loan grows to approximately £170,800 after 10 years.

Roll-Up vs Interest-Only

With a roll-up lifetime mortgage, interest compounds annually, you pay nothing during your lifetime and the full balance is cleared from the sale of your home. With an interest-only lifetime mortgage, you pay the monthly interest to keep the balance static, leaving more equity for your estate.

Formula

Roll-up balance = Loan × (1 + rate)^years | Interest-only payment = Loan × rate ÷ 12

e.g. £100,000 × (1.055)^10 = £170,814 | £100,000 × 5.5% ÷ 12 = £458/month

Worked Example, £100,000 loan at 5.5% AER

Loan amount£100,000
Interest rate5.5% AER
Balance after 5 years (roll-up)£131,209
Balance after 10 years (roll-up)£170,814
Balance after 15 years (roll-up)£222,500
Interest-only monthly payment£458/month

Roll-up interest compounds annually. Interest-only keeps the balance at £100,000 but requires monthly payments.

Frequently Asked Questions

The amount depends on your age and property value, typically 20% to 55% LTV (loan-to-value). A 65-year-old might borrow up to 35–40% of their property's value. Some lenders also offer enhanced terms if you have certain health conditions. Use our equity release calculator for a quick LTV estimate.