Loan Amortization Calculator
Frequently Asked Questions
What is loan amortization?
Loan amortization is the process of paying off a debt over time through regular payments. Each payment is split between:
- Principal - the portion that reduces your loan balance
- Interest - the cost of borrowing money
Early in the loan, most of your payment goes toward interest. Over time, more goes toward principal as your balance decreases.
How is the monthly payment calculated?
The monthly payment is calculated using the standard amortization formula:
M = P[r(1+r)^n]/[(1+r)^n-1]
- M = Monthly payment
- P = Principal (loan amount)
- r = Monthly interest rate (annual rate / 12)
- n = Total number of payments
How do extra payments help?
Making extra payments can significantly reduce your total interest paid and shorten your loan term:
- Extra payments go directly toward principal
- Lower principal means less interest accrues each month
- Even small extra payments can save thousands over the loan life
- You can pay off your loan months or years early
What types of loans use amortization?
Amortization is used for most installment loans, including:
- Mortgages and home loans
- Auto loans
- Personal loans
- Student loans
- Business loans
Credit cards and lines of credit typically do not use amortization - they are revolving credit.
Should I choose a shorter or longer loan term?
The right loan term depends on your financial situation:
- Shorter terms: Higher monthly payments, but less total interest paid and faster payoff
- Longer terms: Lower monthly payments, but more total interest paid over the life of the loan
Consider your budget, other debts, and financial goals when choosing a term.