Payment Formula
This calculator uses the standard annuity formula to compute loan payments:
PMT = [PV × r × (1 + r)^n] / [(1 + r)^n - 1]
- PMT = Payment amount per period
- PV = Present Value (loan amount)
- r = Interest rate per payment period
- n = Total number of payment periods
Compounding Frequency
Compounding frequency affects how often interest is calculated and added to the principal:
- Monthly: Interest compounds 12 times per year
- Quarterly: Interest compounds 4 times per year
- Semi-Annually: Interest compounds 2 times per year
- Annually: Interest compounds once per year
More frequent compounding results in slightly higher effective rates and payments.
Payment Type
- End of Period: Payments are made at the end of each period (most common for loans)
- Beginning of Period: Payments are made at the start of each period, resulting in slightly lower payment amounts
Balloon Payments
A balloon payment is a large payment due at the end of the loan term. When you include a balloon payment:
- • Monthly payments are lower during the loan term
- • The balloon amount is paid in full at the final payment
- • Common in commercial loans and some auto financing
- • Requires planning to ensure funds are available at maturity
How to Use This Calculator
- Enter the Present Value (total loan amount)
- Optionally enter a Future Value if you have a balloon payment
- Input the Annual Interest Rate as a percentage
- Specify the Number of Years for the loan
- Select the Compounding Frequency (usually monthly)
- Choose the Payment Type (end of period is standard)
- Review the calculated monthly payment and total costs
- Examine the amortization schedule to see payment breakdowns
Important Notes
- • This calculator assumes fixed interest rates and equal payment amounts
- • Actual loan terms may include additional fees or charges
- • Some loans have prepayment penalties or restrictions
- • Always verify calculations with your lender before making financial decisions
- • Consider factors like origination fees, insurance, and taxes in your total cost