Finance

Home Loan Total Interest Calculator (15 Years)

Estimate total interest paid over a loan. This home version uses a 15-year planning term as its starting point.

Over 15 years, total interest is the extra amount paid to the lender on top of the borrowed amount, and total paid is the borrowed amount plus that interest, so together they show the full cost of the home loan rather than just the price of the home.

Formula

Total interest equals monthly EMI times number of payments minus the principal.

How it works

A longer term lowers the monthly payment but raises total interest.

Worked example

Loan amount $200,000, annual rate 6.5%, term 15 years. The monthly rate is 6.5% divided by 12, which is 0.0054167, and there are 180 monthly payments. Using the page formula, the EMI is $1,742.21 a month, so the total paid is $313,598.65. Total interest is the total paid minus the principal, which is $313,598.65 minus $200,000, equal to $113,598.65, or 56.8 of the amount borrowed.

A 15-year term is often presented as the balanced home-loan choice, and the numbers show why: the monthly payment is still well above the 30-year figure, but total interest is less than half of the 40-year figure. For a home buyer this term suits a household that can stretch the monthly payment in order to keep the lifetime cost down.

Who this term suits for a home buyer: a home buyer who can afford a firmer monthly payment, for example a household buying a family home and planning to be mortgage-free while still working, who would rather pay more now than pay $157,875.11 or more in interest over a longer term.

FAQs

Why does a longer loan cost more interest?
More payments mean interest is charged for longer, so total interest rises even if each payment is smaller.

Is this home calculator exact?
No, it is an estimate for planning only, based on the numbers you enter.

Are these figures financial advice?
No, they are estimates for planning only, not financial advice. Check with a qualified adviser for decisions involving large sums.

When does a 15-year term make sense for a home loan?
When the household can afford $1,742.21 a month and wants the mortgage finished in a working lifetime without paying the much larger interest bills of 25- or 30-year terms. It trades a higher monthly payment for $113,598.65 of interest, against $255,088.98 over 30 years.

How can a 15-year borrower cut the interest bill?
By overpaying when income allows, because every extra payment cuts the balance that future interest is charged on. Even small regular overpayments shorten a 15-year loan and reduce the $113,598.65 bill.

Can a 15-year figure be used for a second home purchase, like a flat or a plot?
Only as a rough guide. The maths is the same for any $200,000 loan at 6.5%, but a second property may carry different fees, taxes, and lending rules, so the real cost must be checked separately.

Estimates only, not financial advice. Figures are approximate and do not include all fees, taxes, or changing rates unless stated.