Borrowing and credit
What is an interest-only mortgage?
Quick definition: An interest-only mortgage is a mortgage where monthly payments cover interest only, leaving the borrowed capital to be repaid separately.
At a glance
- The loan balance does not reduce just because monthly interest is paid.
- A credible repayment plan is needed for the end of the term.
- It can have lower monthly payments than a repayment mortgage.
- It creates a significant risk if the repayment strategy fails.
Explain it simply
An interest-only mortgage means the monthly payment covers the interest charged by the lender, but it does not gradually pay back the amount borrowed. If someone borrowed 200,000 pounds, they would still need to repay that 200,000 pounds at the end of the mortgage term. This means the borrower needs a separate plan, such as savings, investments or selling a property. It can look cheaper each month, but the final repayment risk is much bigger.
Student explanation
Interest-only mortgages separate interest servicing from capital repayment. The borrower pays interest during the term and must repay the capital through a separate repayment vehicle or strategy. This could include investments, pension lump sums, sale of the property or other assets, depending on lender policy and suitability. Students should understand why regulators and lenders treat interest-only lending carefully: lower monthly payments can mask the fact that the debt remains outstanding unless the repayment plan works.
Professional explanation
An interest-only mortgage is a residential or buy-to-let mortgage where scheduled payments service interest without amortising capital. Lender controls normally focus on acceptable repayment strategies, plausibility checks, equity, loan to value, customer understanding and maturity management. Historic interest-only books have created conduct and maturity risks where borrowers lack credible repayment routes. Professional treatment requires clear distinction between payment affordability during the term and repayment capacity at maturity. Interest-only lending should not be described as cheaper overall simply because monthly instalments are lower.
UK example
A borrower pays interest each month on a 150,000 pound interest-only mortgage and plans to repay the capital when an investment matures.
Why it matters
Interest-only mortgages can reduce monthly payments but leave a large debt to repay, so the repayment plan is central.
Common misunderstanding
Paying every monthly interest bill does not mean the mortgage balance is being paid down.