How to compare loan offers
When comparing loan offers, the most useful figures are the monthly payment, total interest, upfront fees, and total cost including fees. A lower rate can help, but the term length also matters because longer repayment periods usually increase total interest.
Looking only at the monthly payment can lead to the wrong decision. A loan with a lower monthly cost may still be more expensive overall if it runs for much longer or includes higher fees.
The core formula
M = P ร [r ร (1 + r)^n] / [(1 + r)^n - 1]
Total Interest = Total Repaid Through Loan Payments โ Principal
Total Cost Including Fees = Total Repaid Through Loan Payments + Upfront Fees
M = monthly payment, P = principal, r = monthly interest rate, n = number of monthly payments.
Why the cheapest monthly payment can be misleading
A lower monthly payment often comes from stretching the loan over more months. That can make the loan easier to manage each month, but it usually increases the total interest paid over time. Fees can make the difference even wider.
The best comparison is usually to check whether the option with the lowest monthly payment is also the cheapest overall. In many cases, it is not.
Example comparison table
| Loan |
Rate |
Term |
Monthly Payment |
Total Interest |
| Offer A | 6.50% | 5 years | โฌ489.11 | โฌ4,346.53 |
| Offer B | 5.90% | 4 years | โฌ586.60 | โฌ3,156.62 |
| Offer C | 7.20% | 6 years | โฌ429.96 | โฌ5,957.04 |
Frequently Asked Questions
Which loan is cheapest overall?+
The cheapest loan overall is the one with the lowest total cost including fees. That combines the repayment stream and any upfront charges into one figure, making the comparison more realistic than checking monthly payment alone.
Why can a lower monthly payment cost more?+
A lower monthly payment often means the loan runs longer. More months usually means more interest charged overall, so the total repayment can be higher even though the monthly amount feels more affordable.
Are upfront fees included?+
Yes. This calculator keeps upfront fees separate from the principal, but adds them to the total cost including fees so you can compare the true borrowing cost more accurately.
What if one loan has 0% interest?+
If a loan has a 0% interest rate, the total interest stays at zero and total repaid through loan payments equals the principal. In that case, fees and payoff speed become the main comparison factors.
Should I choose lower payment or faster payoff?+
A faster payoff usually reduces the overall borrowing cost, but a lower payment can improve short-term cash flow. The better option depends on whether minimizing total cost or preserving monthly flexibility matters more for you.