Overpaying an interest-only mortgage is generally worth it to reduce the final lump sum payment, decrease total interest paid, and build equity. It serves as a guaranteed, tax-free return equivalent to your mortgage interest rate. However, it is not always the best move if you can earn a higher return on investments or lack emergency savings.
Repayment plans
Technically you don't need to pay off an interest-only mortgage until the term comes to an end – for example, after 25 years. But, from a money-saving perspective, you should seriously consider paying off your interest-only mortgage (at least in part) well before the term ends.
If you have a lower interest rate on your mortgage than on your savings account (for example, your mortgage is 3% and your savings is 6%), it makes financial sense to save with the higher interest rate savings account rather than overpay your mortgage.
If your mortgage rate is similar or higher than your savings rate, overpaying can be beneficial. Considering the current financial climate can help you make your decision. For example, if interest levels on saving deposit accounts are low, using spare cash to pay extra on your mortgage may make more sense.
To pay off a 25-year mortgage in 10 years, you need to make significant extra principal payments through strategies like increasing monthly payments, making bi-weekly payments (effectively one extra payment a year), applying windfalls (bonuses, refunds) as lump sums, or refinancing to a shorter term, focusing on early payments to maximize interest savings.
Overpayments on interest-only parts of your mortgage won't automatically reduce your monthly mortgage payment, unless you ask us to, but could save you money by reducing the amount of interest charged.
“Paying off your mortgage early seems impossible but it is completely doable and people do it all the time, but how can you do it and why would you want to put in the extra effort? Paying off your mortgage early will rev up your wealth building.”
Switch to a repayment mortgage
If you have sufficient time before your interest-only mortgage ends, ask your lender to switch it to a repayment mortgage. This will increase your monthly payments but endure that the balance is repaid at the end of the term.
👎 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!
Interest-only repayments
Once the agreed interest-only period ends, you'll start repaying your principal at the current interest rate at that time. As you're not making payments on the 'principal', this will remain the same, unless you choose to make additional repayments.
You could change to a mortgage where you repay the capital as well as the interest. This is called a repayment mortgage. Your monthly payments are more but you can start paying back the capital you owe. If you cannot afford to switch your whole mortgage, you could keep some of it interest only to afford the payments.
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.
Paying off a loan may help you reduce your DTI and qualify for a mortgage, but it could also drop your credit score a few points, so it may be better to reduce your overall debt balance but not pay off any loans or credit cards in full.
If you have a fixed-rate mortgage, you'll have an annual overpayment allowance (AOA), which is the amount you can overpay each year without incurring any charges. Your AOA is equivalent to 10% of the outstanding balance of your mortgage.
Some mortgages may only allow you to overpay a certain amount each year or may charge a fee for overpayments. It is also essential to assess your overall budget to gauge if you can afford lower liquid savings. Overpaying your mortgage could mean that you have less cash available for other expenses or emergencies.