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.
Lifetime Mortgage Calculator
Enter loan amount and rate, see roll-up balance or interest-only payment instantly
Balance after 10 years
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
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.