Loan Calculator
Calculate monthly payments and total cost for any fixed-rate loan.
What You'll Get From This Loan Calculator
Use this calculator to estimate your monthly loan payment, total interest, and overall repayment cost based on the amount borrowed, interest rate, and loan term. You can also see how changing the repayment period affects the cost of borrowing.
The calculator also lets you test extra monthly, yearly, and one-time payments so you can compare repayment strategies and see how paying additional principal may shorten the loan and reduce future interest.
Build a realistic loan scenario
Begin with the amount you actually expect to borrow rather than the amount you hope to qualify for. Enter the annual interest rate and repayment term from the loan offer or scenario you are comparing. The monthly payment is only one part of the picture: the total interest and total repayment show how the length and pricing of the loan affect its overall cost.
Understand the effect of the repayment term
A shorter term generally means the balance is repaid over fewer scheduled payments, while a longer term spreads repayment across more months. Changing the term can therefore change both the required monthly payment and the amount of interest accumulated over the life of the loan. Comparing two terms with the same borrowed amount and rate can make this trade-off easier to see.
Check extra-payment scenarios
If you have the option to make additional payments, use the extra monthly, yearly, or one-time payment fields to examine how the repayment schedule changes. Extra principal can reduce the balance sooner, which can affect future interest and the payoff date. Treat the resulting figures as planning estimates and check the lender's terms for prepayment rules, fees, payment allocation, and any other conditions that can affect the real repayment schedule.
Review the complete borrowing cost
If you are comparing real loan offers, record any origination charges, application fees, or other costs separately from the interest calculation. The calculator focuses on the inputs available on the page, while an actual agreement may contain additional charges or conditions. Checking the disclosed annual rate, fees, payment schedule, and total repayment together gives you a more complete picture of the offer.
Extra Payments
About Loan Calculator
This Loan Calculator estimates the periodic payment, total amount repaid, total interest, and repayment schedule for a fixed-rate installment loan. It is designed for loans where the borrower makes regular payments over a defined period, with each payment generally containing both interest and principal. By entering the loan amount, annual interest rate, and repayment term, you can estimate the cost of borrowing and see how the balance changes throughout the loan.
The calculator also allows you to include additional monthly, yearly, or one-time payments. These extra payments are applied toward principal and can help illustrate how paying down the balance faster may reduce the total interest charged and shorten the time required to repay the loan.
How Loan Payments Are Calculated
For a standard fixed-rate amortizing loan, the regular payment is calculated using the loan principal, the periodic interest rate, and the total number of scheduled payments. The calculation assumes that the interest rate remains unchanged throughout the repayment period and that payments are made at regular monthly intervals.
In this formula, M represents the monthly payment, P is the original loan principal, r is the monthly interest rate expressed as a decimal, and n is the total number of monthly payments. The annual interest rate is divided by 12 to determine the monthly rate, while the loan term in years is multiplied by 12 to determine the number of monthly payments.
Principal and Interest
The principal is the amount originally borrowed. Interest is the cost charged for borrowing that money. With a typical amortizing loan, interest is calculated from the outstanding balance. Because the balance generally decreases after each payment, the interest portion tends to decline over time while the portion applied to principal generally increases.
Principal
Principal represents the actual amount borrowed from the lender. When a portion of a payment is applied to principal, the remaining loan balance is reduced. Paying principal more quickly can shorten the repayment period and reduce the balance on which future interest is calculated.
Interest
Interest represents the borrowing cost associated with the loan. For a fixed-rate amortizing loan, the interest charged in each period is based primarily on the remaining principal balance and the applicable periodic interest rate. As the outstanding balance falls, the interest portion of future payments generally becomes smaller.
How Loan Term Affects Cost
The repayment term determines how many payments are required to repay the loan. A longer term generally produces a lower required monthly payment because the balance is spread across more payments. However, interest may be charged over a longer period, which can result in a higher total interest cost.
A shorter loan term generally produces a higher monthly payment because the principal must be repaid more quickly. In exchange, the borrower typically pays interest for fewer periods, which can reduce the total cost of borrowing when the interest rate and other terms remain the same.
How Interest Rate Affects Loan Payments
The interest rate directly affects both the periodic payment and the total interest paid. For the same loan amount and repayment term, a higher interest rate generally results in a higher monthly payment and greater total interest. A lower interest rate generally reduces both the periodic payment and the overall borrowing cost.
Understanding the Amortization Schedule
An amortization schedule provides a payment-by-payment view of the loan. It shows the payment number, payment date, scheduled payment, interest charged, principal paid, additional principal payments, and remaining balance. This makes it easier to see how the loan progresses from the original balance toward full repayment.
Early in an amortizing loan, the outstanding balance is at its highest level, so the interest portion of the payment is typically larger. As principal is paid down, less interest is calculated on each subsequent balance and more of the regular payment can be applied toward principal.
How Extra Payments Affect a Loan
Additional payments can be used to reduce the principal balance faster than required under the original payment schedule. Because future interest is generally calculated using the remaining balance, reducing principal earlier can lower the amount of interest that accrues over the remaining life of the loan.
This calculator supports three types of additional payments: recurring extra monthly payments, an additional yearly payment, and a one-time payment during a selected month. The effect of these payments depends on their amount and timing. An earlier reduction in principal can generally have a greater effect on future interest than the same amount paid later.
Loan Payment vs. Total Loan Cost
The monthly payment alone does not describe the full cost of a loan. Two loans can have similar monthly payments while producing different total costs because of differences in the interest rate, repayment term, fees, or other charges. Comparing total payments and total interest can provide a clearer view of the long-term borrowing cost.
The calculator separates the original loan amount, scheduled payments, interest, and additional principal payments so that you can see how each component contributes to the overall repayment amount.
Loan Calculator Example
Suppose you borrow $25,000 at a fixed annual interest rate of 7.5% for five years. With monthly payments and no additional payments, the loan is repaid over 60 scheduled payments.
These figures represent the estimated principal and interest repayment for the example loan. Making additional principal payments can change the payoff time and reduce the amount of interest charged over the remaining repayment period.
Fixed-Rate vs. Variable-Rate Loans
This calculator is designed primarily for fixed-rate installment loans. With a fixed-rate loan, the interest rate remains constant throughout the calculation, allowing the regular principal and interest payment to be determined in advance.
Variable-rate loans can change their interest rate during the repayment period. Because future payments may change when the rate changes, a fixed-rate amortization calculation may not accurately represent the future payment schedule for a variable-rate loan.
Factors That Can Change the Actual Loan Cost
The calculated result represents an estimate based on the information entered. Actual borrowing costs can differ because lenders may apply origination fees, administrative charges, insurance costs, late payment charges, prepayment conditions, or other loan-specific fees. Payment timing and lender-specific calculation methods can also affect the final amount paid.
Frequently Asked Questions
What is an amortizing loan?
An amortizing loan is repaid through a series of scheduled payments that gradually reduce the outstanding principal balance. Each payment generally includes interest and principal, with the balance eventually reaching zero when the scheduled payments are completed.
Does a longer loan term mean a lower monthly payment?
Generally, yes. Extending the repayment period spreads the principal across more payment periods, which usually lowers the required monthly payment. However, the longer period can also result in more total interest being paid.
Can I make extra payments?
Yes. You can enter an extra monthly payment, an extra yearly payment, and a one-time payment. The calculator applies these additional amounts toward the principal balance.
Do extra payments reduce total interest?
They can. Reducing the principal balance sooner generally reduces the balance used to calculate future interest, which may lower the total interest paid over the remaining repayment period.
What happens if the interest rate is 0%?
When the interest rate is 0%, no interest is charged under the calculation. The original loan amount is divided across the total number of scheduled payments, subject to any additional payments entered by the user.
Why is my actual payment different from the calculator result?
Actual loan payments may differ because lenders can include fees, insurance, taxes, different payment frequencies, variable rates, rounding methods, or other contractual terms that are not included in this basic loan calculation.
Financial Disclaimer
Results are estimates only and should not be considered financial, investment, tax, or legal advice. Please consult a qualified professional before making financial decisions.