Calculator Inputs
Use the form below to estimate personal loan APR from loan size, fees, term, payment timing, and optional balloon structure.
Example Data Table
This example shows how fees can push APR above the note rate, even when payment timing stays unchanged.
| Loan Amount | Stated Rate | Total Fees | Payments | Frequency | Payment | Estimated APR |
|---|---|---|---|---|---|---|
| $20,000.00 | 11.50% | $900.00 | 48 | Monthly | $521.78 | 13.98% |
| $12,500.00 | 9.25% | $350.00 | 36 | Monthly | $398.57 | 11.08% |
| $8,000.00 | 13.00% | $200.00 | 52 | Weekly | $174.55 | 14.37% |
Formula Used
APR is solved as the annualized discount rate that makes the present value of scheduled payments equal the net amount the borrower actually receives.
Payment = [r × (PV − FV / (1 + r)^n)] ÷ [1 − (1 + r)^−n]
Net Proceeds = Loan Amount − Included Fees
Net Proceeds = Σ [Payment_t ÷ (1 + i)^t]
Nominal APR = i × Periods Per Year
Effective Annual Rate = (1 + i)^(Periods Per Year) − 1
Here, PV is principal, FV is balloon payment, r is the note rate per period, n is the payment count, and i is the solved APR rate per period.
How to Use This Calculator
Enter the original loan amount first. Add the stated note rate if you want the calculator to estimate the scheduled payment automatically.
Choose the total number of installments and the payment frequency. Enter a custom payment only when your contract already states a fixed periodic amount.
Add origination, insurance, and other upfront charges. Keep the fee inclusion option on when those charges reduce the amount you actually receive.
Use a balloon payment if the contract ends with a larger final amount. Then submit the form to see APR, repayment totals, finance charge, graph, and schedule.
Download CSV for spreadsheets and PDF for reports, reviews, or borrower comparisons.
Frequently Asked Questions
1. What does APR show that the stated rate does not?
APR reflects the broader borrowing cost. It includes the effect of prepaid charges and payment timing, so it usually shows a truer cost than the note rate alone.
2. Why is APR usually higher than the interest rate?
When fees are deducted from the proceeds, you receive less cash but still repay the full scheduled amount. That difference pushes the solved APR above the note rate.
3. Should I enter a payment amount manually?
Enter a payment only when your agreement already specifies it. Otherwise, leave the field blank and let the calculator derive payment from the stated rate, term, and balloon amount.
4. What is net proceeds in this calculator?
Net proceeds are the funds the borrower actually receives after included fees are deducted. APR is solved against that amount rather than the original face-value loan size.
5. Can this calculator handle balloon loans?
Yes. Add the final lump sum in the balloon field. The calculator uses it both in the note-payment logic and the APR cash-flow solve.
6. Why does my ending balance stay above zero?
That usually happens when a custom payment is too small for the stated note rate and term. Increase payment, extend term, or add a larger balloon amount.
7. Is the effective annual rate the same as APR?
Not always. This page shows nominal APR and effective annual rate together. APR is annualized from the periodic solve, while effective rate includes compounding across the year.
8. Will lender disclosures always match this output exactly?
Not necessarily. Real disclosures may follow jurisdiction-specific rules, exact calendar-day timing, rounding rules, or fee treatments. This calculator is strong for analysis, comparison, and planning.