Interest-only mortgages offer lower initial payments but come with significant risks, primarily that you build no home equity during the initial period and face a major payment shock when principal repayment begins. Borrowers risk owing more than the home is worth if property values drop, and often pay higher interest rates over the life of the loan.
The biggest drawback of an interest only mortgage is that you don't pay off the loan as you go. This means you have to find another way to do this – you can't just forget about it. Another downside of an interest-only mortgage is that the total amount you repay over time will be much higher than a repayment mortgage.
One major risk is that your monthly payments could increase significantly at the end of the interest-only period when you are required to start paying both principal and interest. Additionally, if your property's value decreases, you could find yourself underwater on your loan — owing more than the property is worth.
If you intend to invest and sell before the loan term ends, interest-only might be useful for you. On the other hand, if you're buying a family home for the long term, principal-and-interest repayments might serve you better.
An interest-only mortgage payment on $200,000 depends on the interest rate, but at 5%, it's around $833/month (just interest), significantly lower than principal & interest payments, though you never build equity and pay more total interest over time, with later payments including principal. For example, at 3.25%, the initial payment is about $542/month for the interest-only period.
With interest-only mortgages, you only pay off the interest on the amount you borrow. You use savings, investments or other assets you have (known as 'repayment plans') to pay off the total amount borrowed at the end of your mortgage term.
The 3-7-3 Rule in mortgages isn't a loan type but a federal timeline from the TILA-RESPA Integrated Disclosure (TRID) rule, ensuring borrower protection by mandating disclosures within 3 business days of application, a 7-business-day wait between the initial Loan Estimate and closing, and another 3-day wait if significant changes (like APR) occur, giving borrowers time to review costs before committing to a loan.
What are the benefits of interest-only mortgages? Some people like the flexibility to be able to make lower payments initially, and pay more when their income or savings increase near the end of their mortgage term.
An interest-only mortgage offers a lower monthly payment at first and is best suited for people with ample assets, good credit and short-term ownership.
If you do not feel downsizing is practical for health or other reasons, Martin Lewis thinks a lifetime mortgage is an option to consider, if you seek expert advice on all your options, including any other alternatives, such as entitlement to means tested benefits and taking a lodger to provide extra income, for example ...
When your interest-only mortgage ends, your lender will expect you to pay off the loan in full with a single lump sum. Hopefully this won't be a surprise. Your lender should have been in touch with you a year before, six months before and finally just before the end of your mortgage.
Interest-only mortgages used to be easy for banks to resell to other financial institutions. That's no longer the case. Today, this loan type is seen as higher risk. As a result, mortgage lenders often charge higher interest rates than they do for fixed-rate mortgages.
👎 Drawbacks of Interest-Only Mortgages
With interest-only, you're only paying to borrow, not own. So, unless the market adds value to your home, you won't be building any equity. If prices drop, you could even end up owing more than your home's worth – a bit like paying rent but with a big bill waiting at the end!
The interest paid on a mortgage, along with any points paid at closing, are tax-deductible if you itemize on your tax return. Use this calculator to see how this deduction can create a significant tax savings.
You can pay off your interest only mortgage early, but there may be limitations to the amount you can repay without incurring an Early Repayment Charge (ERC), depending on your mortgage. Check your mortgage terms for more information on repayments limits or charges.
Increasing your monthly payments, making bi-weekly payments, and making extra principal payments can help accelerate mortgage payoff. Cutting expenses, increasing income, and using windfalls to make lump sum payments can help pay off the mortgage faster.