Frequently Asked Questions
Why is the true APR higher than the quoted rate?
Upfront fees (origination, points) reduce the cash you actually receive but you still repay based on the full loan amount, so the effective cost is higher than the nominal rate.
How is the fee-inclusive APR found?
The calculator computes the monthly payment on the loan, then solves for the rate that equates the financed amount minus fees to that stream of payments.
Why does APR matter for comparing loans?
A loan with a low rate but high fees can cost more than a higher-rate, no-fee loan. APR rolls both into a single comparable number.
Does APR include every cost?
It includes finance charges and most lender fees but not third-party costs that would be paid regardless of the loan. Always check what each lender bundles in.
What is APR and how does it differ from the nominal rate?
The nominal rate (or note rate) is the pure cost of borrowing before any fees. APR folds the upfront fees in as well, spread across the loan term, so it reflects the true total cost of the financing. Always compare loans by APR, not by nominal rate.
When is it worth paying points to lower the rate?
Paying points lowers the rate but raises your upfront cost. Work out the break-even: divide the cost of the points by the monthly savings. If that figure (in months) is shorter than how long you plan to keep the loan, the points pay off. If you expect to refinance or sell soon, they usually do not.
Why does the calculator use bisection instead of a direct formula?
The annuity equation cannot be inverted in closed form to solve for the rate directly. Bisection repeatedly halves a rate interval until the present value matches the financed amount. It is slower than Newton's method, but it is robust and always converges to a finite result, even with unusual inputs.
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Estimates only. Not financial advice.
Financial Disclaimer: Estimates only. Not financial advice.
This calculator provides estimates for informational purposes only. Actual financial outcomes depend on market conditions, personal circumstances, and decisions. Not financial advice. Consult a certified financial planner before making financial decisions affecting your future.