Understanding Loan Payments
A loan payment calculator helps you determine how much you will pay each month on a personal loan, auto loan, or other installment loan. Understanding the components of your loan payment, including how much goes to principal versus interest, empowers you to make better borrowing decisions and develop strategies to pay off your loan faster. Most installment loans use an amortization schedule where early payments are heavily weighted toward interest, with more going to principal as the loan matures.
The total cost of a loan depends on three primary factors: the loan amount, the interest rate, and the repayment term. A longer term reduces your monthly payment but significantly increases the total interest paid. For example, a $15,000 loan at 7% costs $297/month over 5 years ($2,804 total interest) but only $177/month over 10 years ($6,173 total interest). The lower monthly payment costs an additional $3,369 in interest over the life of the loan.
The Annual Percentage Rate (APR) includes both the interest rate and any loan fees, giving you the true cost of borrowing. When comparing loans, always compare APR to APR. A loan with a lower interest rate but higher fees may have a higher APR than a loan with a slightly higher rate and no fees.
Loan Payment Formula
| Rate/Term | 36 Months | 48 Months | 60 Months | 72 Months |
|---|---|---|---|---|
| 5% | $449 | $345 | $283 | $242 |
| 7% | $463 | $359 | $297 | $256 |
| 10% | $484 | $380 | $319 | $278 |
| 15% | $520 | $417 | $357 | $317 |
| 20% | $557 | $456 | $397 | $359 |
- 1Monthly rate: 7% / 12 = 0.5833%
- 2Monthly payment = $15,000 x [0.005833 x (1.005833)^60] / [(1.005833)^60 - 1]
- 3Monthly payment = $297.02
- 4Total paid over 60 months: $297.02 x 60 = $17,821
- 5Total interest: $17,821 - $15,000 = $2,821
- 6First month: $87.50 interest, $209.52 principal
- 7Last month: $1.72 interest, $295.30 principal
Types of Loans and Typical Rates
- Personal loans: 6-36% APR depending on credit score; unsecured, typically 2-7 year terms
- Auto loans (new): 4-8% APR for good credit; secured by the vehicle, 36-84 month terms
- Auto loans (used): 5-12% APR; higher rates due to older collateral
- Student loans (federal): Currently 5.50% for undergrad; fixed rate, various repayment plans
- Student loans (private): 4-16% APR based on creditworthiness; fixed or variable rate
- Home equity loans: 7-10% APR; secured by home equity, tax-deductible interest (if used for home improvement)
- Credit card debt: 15-29% APR; revolving, compounded daily; the most expensive common debt
Strategies to Reduce Loan Costs
Save Money on Loans
Canadian Loan Considerations
Canadian loan interest is typically disclosed as an annual rate but may be compounded differently depending on the loan type. Canadian mortgages compound semi-annually, while most other loans compound monthly or daily. The Canadian Interest Act requires that loan agreements clearly state the annual interest rate. Canadian payday loan regulations vary by province but generally cap rates at $15 per $100 borrowed per two-week period (equivalent to approximately 390% APR). Credit unions in Canada often offer the best personal loan rates. Canadians should compare the total cost of credit (TCC) disclosed by lenders to understand the true cost of borrowing.
Extending a loan term to get a lower monthly payment significantly increases total interest. A $20,000 auto loan at 7% costs $3,762 in interest over 5 years but $6,713 over 7 years. The extra 2 years add $2,951 in interest. Always consider total cost, not just monthly payment.