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Equal-Payment vs. Equal-Principal Loan Repayment: What's the Difference?

When taking out a mortgage or similar loan, you often choose between "equal payment" and "equal principal" repayment. Even with the same loan amount, interest rate, and term, the total you pay differs based on which you choose.

What is equal-payment repayment

A method where the total payment each period (principal + interest combined) stays the same throughout the loan term. Interest makes up a larger share of the payment early on, with principal's share growing over time.

What is equal-principal repayment

A method where the principal portion repaid each period stays the same. Since interest is calculated on the remaining balance, the total payment (principal + interest) is highest at the start and gradually decreases over time.

The difference in monthly payment amount

Under identical loan terms, the payment right after the loan begins is higher with equal-principal and lower with equal-payment β€” though the equal-principal payment gradually decreases over time.

The difference in total interest paid

Because the principal balance (on which interest is calculated) shrinks faster under equal-principal repayment, total interest paid tends to be lower with equal-principal than with equal-payment, given the same loan amount, rate, and term.

Ease of household budgeting

Because the monthly payment never changes, equal-payment repayment makes household budgeting easier to plan β€” it's the standard method used by most mortgage lenders.

Which to choose depends on your priorities

Equal-payment suits those who want to minimize the burden right after the loan starts; equal-principal suits those who want to minimize total interest and can handle a higher initial payment. Note that not all lenders offer equal-principal repayment, so check in advance.

Why the payment breakdown shifts over time

Because interest is calculated on the outstanding loan balance, equal-payment repayment has a higher share of interest early on, when the balance is largest. As the balance shrinks with each payment, the interest portion shrinks too β€” so within a fixed total payment, more and more goes toward principal over time.

Checking with a lender or simulator is the surest approach

The actual payment amount and total interest vary significantly based on loan amount, rate type (fixed or variable), and term. For exact figures, using a repayment simulator offered by a financial institution is recommended.

Frequently Asked Questions

Can anyone choose equal-principal repayment?

Some lenders or loan products don't offer equal-principal repayment. If you want it, you'll need to confirm availability with the lender before applying.

Can I switch repayment methods partway through the loan?

Whether you can change repayment methods after signing depends on the lender and product. If you want to switch, start by consulting your lender.