Enter a loan balance or principal and the annual interest rate (%) to calculate the quarterly interest owed on the loan.
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Quarterly Interest Formula
The following formula is used by the calculator above to determine the quarterly interest of a loan or mortgage.
QI = LB X AIR / 400
- Where QI is the quarterly interest ($)
- LB is the loan balance ($)
- AIR is the annual interest rate (%)
- 4 represents the number of quarters in a year
To calculate quarterly interest, multiply the loan balance by the annual interest rate, convert the rate to a decimal by dividing by 100, and then divide by 4 (effectively dividing by 400).
This formula calculates the total interest you would pay each quarter on a loan throughout its lifetime. Note that actual payment schedules may vary as most loans are repaid on a monthly basis.
Quarterly Interest Definition
Quarterly interest is the interest accrued over a three-month period on a loan or mortgage, based on the annual interest rate and the loan balance.
