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Calculate the true annualized cost of a loan, including interest and extra fees, to reveal your actual borrowing burden.
Enter loan information to calculate APR
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Enter a loan amount, a positive nominal annual interest rate, a term in years, and any one-time upfront fee. The calculator estimates a monthly payment, total scheduled payments, interest, and a fee-adjusted annualized rate under a simplified monthly-payment model. It assumes the fee is withheld at the start, so the borrower receives the loan amount minus that fee while making payments based on the full principal.
In the United States, a lender’s APR disclosure follows Truth in Lending requirements and may account for finance charges and transaction details beyond this model. The estimate here is not a lender disclosure, Loan Estimate, or legal APR determination. Use official lender disclosures to compare real offers. The CFPB explains that a loan interest rate and APR differ because APR accounts for additional charges, while the precise calculation depends on the transaction.
Let P be principal, R the nominal annual rate entered as a percent, Y the term in years, and F the upfront fee. The monthly rate is r = R ÷ 100 ÷ 12, and the number of payments is n = 12Y. The payment follows the standard amortizing-loan formula; a separate monthly rate is then solved so the present value of those payments equals P − F.
Payment = P × r × (1 + r)n ÷ ((1 + r)n − 1)
P − F = Payment × (1 − (1 + i)−n) ÷ i
Displayed estimate = 12 × i × 100%
The displayed estimate annualizes the solved monthly rate by multiplying by 12. It is not the effective annual rate compounded over 12 months. Total payments are payment multiplied by the number of months; displayed total interest is total payments minus principal.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use a positive principal amount, a positive annual interest rate, a term in years, and a one-time fee. Keep all money values in the same currency, such as US dollars.
Compare the estimated annualized rate with the monthly payment, total payment, and total interest. The schedule chart shows remaining balance by month; the breakdown separates principal from interest.
Adjust the upfront fee or term to see how the simplified estimate changes. Keep the rate and payment structure comparable when reviewing two hypothetical cases.
Before making a decision, compare the lender’s official APR and itemized fees in the disclosure for the actual loan.
APR displays three decimal places; payment, total repayment, and interest display two. The underlying figures are not rounded first, so independently adding displayed amounts can differ by a few cents.
Use cases
See how the tool fits into real work and everyday tasks.
A borrower can model the same principal and term with each quote’s positive rate and one-time upfront fee. Treat the output as a screening estimate and confirm recurring or financed charges in each lender’s disclosure.
A household can compare a hypothetical no-fee case with one that withholds an upfront fee. The fee lowers modeled proceeds while the payment remains based on the stated principal, which raises the computed annualized rate.
A learner can inspect how a fixed payment is split between principal and interest over time under a steady monthly rate. The modeled schedule does not include payment timing changes or other loan charges.
Q&A
Find concise answers to common questions and confusing cases.
No. It is an estimate under a simplified set of assumptions. US disclosure rules can include transaction-specific charges and calculation requirements; use the lender’s official disclosure for the actual loan.
No. The payment calculation divides by the monthly rate, so this calculator requires a positive rate. A zero-rate loan needs a different payment calculation and should not be forced through this form.
The headline total is computed as total scheduled payments minus principal, while the schedule contains month-by-month floating-point values. Small differences can result from calculation and display rounding.
No. The fee reduces the modeled amount received and affects the rate solve; it is not added to the displayed scheduled-payment total or interest figure.
Notes
Review scope, result limitations, and important precautions before use.
This calculator models a fixed nominal rate, equal monthly payments, a term expressed in whole monthly periods, and a single upfront fee deducted from proceeds. It does not account for every charge, payment date, adjustable rate, insurance premium, tax, or other feature that may affect a US APR disclosure. The result is not financial advice or a lender’s legally required APR. Do not rely on it to sign or price a loan; review the actual disclosures and consult a qualified professional if you need help interpreting them.
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