Quick answer: amortization is how a loan payment splits between interest and principal over time. Early payments go mostly to interest; later payments go mostly to principal. Generate your own schedule with our free Amortization Schedule Generator.
Why Early Payments Are Mostly Interest
Interest is calculated on your remaining balance each period. Early in the loan, the balance is largest, so the interest charge is largest too. As you pay down the balance, less interest accrues each period, so more of your fixed payment goes toward principal instead.
A Real Example
On a $300,000 loan at 6.5% over 30 years, the monthly payment stays fixed at about $1,896 — but in year 1, roughly $1,620 of that goes to interest and only $276 to principal. By year 25, that ratio nearly flips.
Why This Matters for Extra Payments
Because interest is highest early on, extra payments made in the first few years of a loan save far more in total interest than the same extra payment made near the end. Even one extra payment per year in the early period can shave years off a mortgage.
Frequently Asked Questions
Does this work for any loan type?
Yes — mortgages, car loans, personal loans, or student loans, as long as it's a fixed-rate, fixed-term loan.
Why does my balance not reach exactly zero?
Rounding in the final payment typically brings it to exactly zero; minor display rounding may show a tiny residual.
How can I use this to pay off my loan faster?
Look at the early years' interest portion — extra payments there reduce the balance while interest is highest, saving the most over the life of the loan.
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