Equal Payment Calculator
Calculate monthly payments for equal payment amortization loans
Input
Result
Total Principal vs Total Interest
This calculator is for informational purposes only and should not be considered as financial advice. Actual values may vary.
What is Equal Payment Calculator?
The Equal Payment Calculator (also known as an amortization calculator) helps you determine the fixed monthly payment for a loan under the equal payment amortization method. In this repayment structure, you pay the same total amount every month throughout the loan term. Each monthly payment consists of two parts: principal repayment and interest. Early in the loan, a larger portion of your payment goes toward interest, while the principal portion gradually increases over time. The formula used is M = P × [r(1+r)^n] / [(1+r)^n - 1], where M is the monthly payment, P is the loan principal, r is the monthly interest rate, and n is the total number of payments. This is the most common repayment method for mortgages and personal loans in Korea and worldwide because it provides predictable, consistent monthly payments that make budgeting easier. Our calculator instantly computes your monthly payment, total payment, total interest, and generates a complete amortization schedule showing exactly how each payment is split between principal and interest. Whether you are planning a home purchase, comparing loan offers from different banks, or considering refinancing, this tool helps you understand the true cost of borrowing and make informed financial decisions.
How to Use
- Enter the loan amount.
- Enter the annual interest rate (%).
- Enter the loan term in months.
- Review the calculation results and amortization schedule.
Tips & Best Practices
- Compare the same loan amount across different interest rates and terms to find the most affordable option before signing a loan agreement.
- Shorter loan terms mean higher monthly payments but significantly lower total interest paid over the life of the loan.
- Even a 0.1% difference in interest rate can translate to hundreds of thousands of won in savings over a 20-30 year mortgage.
- Consider making extra principal payments when possible to reduce total interest and shorten your loan term without refinancing.
- Use the amortization schedule to identify how much of your early payments go to interest versus principal, helping you plan prepayment strategies.
Use Cases
Home Mortgage Planning
Compare different mortgage offers from banks by entering each loan amount, rate, and term to see which option results in the lowest total cost.
Auto Loan Comparison
Calculate monthly payments for various car financing options to determine which fits your monthly budget while minimizing total interest.
Refinancing Analysis
Enter your current loan balance as the new principal with a lower interest rate to see how much you could save by refinancing.
Debt Consolidation
Combine multiple debts into one loan amount and calculate whether consolidation at a given rate would reduce your overall monthly payment.
FAQ
What is equal payment amortization?
Equal payment amortization means you pay the same total amount each month (principal + interest). Initially the interest portion is larger, and over time the principal portion increases.
What is the difference between equal payment and equal principal?
Equal payment keeps monthly payments constant, while equal principal divides the principal equally, resulting in higher initial payments that decrease over time. Total interest is lower with equal principal.
How is total interest calculated in equal payment loans?
Total interest is calculated as (monthly payment × number of months) minus the principal. Longer loan terms result in higher total interest.
What is an amortization schedule?
An amortization schedule is a table showing the breakdown of principal and interest in each monthly payment. It helps you see how your balance decreases over time.
Is my financial data stored?
No, all calculations are performed in your browser and no financial data is sent to or stored on any server.
Does a small difference in interest rate matter?
Yes, with large loan amounts and long terms, even a 0.1% difference can result in hundreds of dollars in additional interest.
Can I use this calculator for mortgages?
Yes, this calculator works perfectly for mortgages. Enter your home loan amount, the annual interest rate offered by your bank, and the loan term in months (e.g., 360 for a 30-year mortgage) to see your fixed monthly payment and total cost.
What happens if I make extra payments on my loan?
Extra payments reduce your outstanding principal faster, which means less interest accrues in subsequent months. This can significantly shorten your loan term and reduce total interest paid. You can simulate this by recalculating with the reduced balance.
Why is more interest charged at the beginning of the loan?
Interest is calculated on the remaining balance each month. Since the balance is highest at the start, the interest portion of your payment is largest initially. As you gradually pay down the principal, the interest portion decreases and more of your payment goes toward the principal.
How accurate is this calculator compared to actual bank calculations?
This calculator uses the same standard amortization formula used by financial institutions. However, actual payments may vary slightly due to rounding, specific bank policies, fees, or variable rate adjustments.
What is a good interest rate for a loan in Korea?
Interest rates fluctuate based on the Bank of Korea base rate and market conditions. As a general guideline, mortgage rates typically range from 3% to 6%, while personal loans may range from 4% to 15% depending on creditworthiness.
Should I choose a longer or shorter loan term?
A shorter term means higher monthly payments but much lower total interest. A longer term offers lower monthly payments but costs significantly more in total interest. Choose based on your monthly budget and financial goals.