Estimate the real cost of an unsecured personal loan. Enter the amount, rate, and term for the monthly payment, total interest, and payoff date. Open Fee and insurance to fold in origination (percent or dollars, deducted or upfront) and optional monthly credit insurance — the calculator then reports cash received, total cost, and the fee-inclusive APR.
Formula
The contractual payment amortizes the face loan amount. Monthly rate r is the annual rate ÷ 12; n is years × 12 + extra months:
payment = P × r / (1 − (1 + r)^(−n))
Each payment covers that month's interest first; the rest reduces principal. Origination does not change P — a deducted 5% fee on $20,000 still amortizes $20,000. You simply receive $19,000.
When fees or insurance are on, cost of loan is total interest + origination
- total insurance. APR is the IRR of (rounded monthly payment + insurance)
against net proceeds (
loan − origination), annualized as12 × monthly IRRand rounded to three decimals.
Rank offers by APR, not the note rate. A 12% loan with a 5% fee has an APR around 14.3% over five years — still cheaper than many credit cards, but not the 12% on the flyer.
Typical personal loan terms
| Common range | |
|---|---|
| Amount | $5,000 – $35,000 |
| Term | 3 or 5 years |
| Rate (unsecured) | Often high single digits to 25%+ |
| Origination | 1–5% of the loan, usually deducted |
Examples
$20,000 at 10% for 5 years
The default: a $424.94 monthly payment, $25,496.45 over 60 payments, and $5,496.45 in interest, paying off in September 2031 if you start in September 2026. No fees — APR equals the 10% note rate.
Same loan with a 5% origination fee deducted
You still pay $424.94 a month, but only $19,000 is disbursed. Origination is $1,000, cost of the loan is $6,496.45, and APR rises to 12.239%. Paying that fee upfront instead of deducting it produces the same APR (same net proceeds).
Debt-consolidation comparison
$16,000 for 5 years at 12% with a 5% fee upfront: $355.91 a month and an APR of about 14.28%. If that replaces cards at 19.99% and 24.99%, the personal loan is cheaper — provided the origination is paid once and the cards are not used again.