Interest-Only vs Repayment Mortgage: Which One Is Right for You?

Every mortgage you’ll ever be offered falls into one of two camps: interest-only or repayment. The difference sounds simple, but it shapes how much you’ll actually owe at the end of your term, and it’s worth understanding properly before you choose either one.

What’s the Actual Difference?

On a repayment mortgage, every monthly payment chips away at both the interest and the amount you originally borrowed, so the balance shrinks to zero by the end of the term. On an interest-only mortgage, your payment only covers the interest. The capital you borrowed is still owed in full at the end, unless you’ve arranged a separate way to pay it off.

Why Do People Choose an Interest-Only Mortgage?

Usually for lower monthly payments, or because they already have a clear plan to repay the capital another way, through savings, investments, or the sale of another asset. It’s also common on buy-to-let properties, where the strategy is often built around the property’s value rather than paying down the loan monthly.

What You Need in Place at the End of the Term

A credible plan, and your lender will want to see evidence of it before they approve you. This is usually called a repayment vehicle, and it might be a savings plan, an investment, a pension lump sum, or the sale of the property itself. If you’re relying on investments, it’s worth reviewing them regularly, since their value can fall as well as rise, and a shortfall at the end of your term can leave you needing to find the difference at short notice. MoneyHelper’s guide sets out the main options in more detail.

Is a Repayment Mortgage Always the Safer Choice?

For most people buying a home to live in, yes, it’s the default for a reason. Provided you keep up the payments, your balance is guaranteed to reach zero by the end of the term, with no dependency on how an investment performs. The trade-off is a higher monthly payment than an interest-only mortgage of the same size.

Can You Switch From Interest-Only to Repayment Later?

Often, yes, subject to your lender’s rules and an affordability check at the time. Some people also move to a part-and-part arrangement, paying down some capital each month while keeping part of the loan on interest-only terms. It’s worth raising this at your next renewal rather than waiting until the end of the term to think about it.

So Which One Should You Choose?

For most people buying a home to live in, repayment is the straightforward choice. Interest-only tends to suit specific circumstances, such as landlords or those with a clear, evidenced plan for the capital, rather than being a general affordability shortcut. Understanding your full mortgage affordability picture, and getting a mortgage agreement in principle in place, will make the right option clearer before you commit either way.

Not Sure Where You Stand?

Whether you’re weighing up your first mortgage or reviewing an interest-only deal that’s coming up for renewal, a quick conversation costs nothing and could save you a lot. Get in touch with our team and we’ll give you a straight, honest picture of your options.

Frequently Asked Questions

What’s the difference between an interest-only mortgage and a repayment mortgage?

A repayment mortgage pays off both interest and capital each month, clearing the balance by the end of the term. An interest-only mortgage only covers the interest, leaving the full capital still owed at the end.

Can I get an interest-only mortgage for my own home?

Some lenders offer this, but you’ll usually need to show a credible, evidenced plan for repaying the capital, along with meeting stricter income and equity requirements than on a standard repayment mortgage.

What happens if my repayment plan falls short?

You’ll need to find another way to cover the gap, whether that’s remortgaging part of the balance, using other savings, or in some cases selling the property. This is exactly why lenders want a credible plan in place from the outset.

Can I switch from interest-only to repayment?

Often, yes, subject to an affordability check with your lender. Many people also opt for a part-and-part mortgage as a middle ground.

Is an interest-only mortgage cheaper overall?

Monthly payments are lower, but you’ll pay more interest over the life of the loan since the capital isn’t reducing. Whether it’s “cheaper” depends on how the separate repayment vehicle performs.

Do I need proof of a repayment plan to get an interest-only mortgage?

Yes, in almost all cases. Lenders will ask for evidence of your repayment vehicle, whether that’s an investment statement, a pension projection, or another credible source, before approving an interest-only application.