Gypes

Borrowing offer comparison

Loan comparison calculator

Compare two written fixed-rate offers using the same usable proceeds, then separate contract payment, disclosed APR, fees, full-term cost, and an equal-time payoff horizon.

Use two transaction-specific disclosures for the same borrowing purpose. The contract interest rate drives each modeled payment; disclosed APR is recorded separately so a fee is not silently counted twice.

1Set the common comparison basis

Both offers must produce the same usable cash. Add an equal-time horizon only when you expect to refinance, sell, or pay off before one or both contractual terms end.

2Enter Offer A payment terms

Copy the contract or note rate used to calculate payment. Record APR separately; APR can include finance charges and is not automatically the payment rate.

3Reconcile Offer A mandatory fee

Enter one exact mandatory lender-fee total from the disclosure and show how it affects cash or principal. Do not include optional products you have declined.

4Enter Offer B payment terms

Use a written offer for the same usable proceeds and borrowing purpose. Copy rate, term, and APR from the same version and date of the offer.

5Reconcile Offer B mandatory fee

Use the same fee scope as Offer A so the cost difference is not created by including a charge on one side and omitting it on the other.

Begin with two matched written offers

A useful loan comparison starts with two transaction-specific disclosures for the same borrower, purpose, and usable proceeds. Do not place a lender’s lowest advertised rate beside a complete offer issued after underwriting. Do not compare a $25,000 loan with a second contract that leaves only $24,000 available after a withheld fee. Differences in source documents can overwhelm the differences the calculator is meant to measure.

Record each offer’s contract interest rate, term, disclosed APR, mandatory lender-fee total, and the way that fee affects cash or principal. Use documents produced close enough together that market movements or changed borrower information are not the hidden reason for different terms. The result is an estimate to reconcile with disclosures, not a substitute for them.

Compare the same usable net proceeds

The common amount on this page is the cash available for the intended purchase, payoff, or other borrowing purpose. A fee paid separately leaves contract principal equal to those proceeds and creates an upfront cash cost. A fee added to principal increases the amount on which interest is charged. A fixed fee deducted from proceeds also requires a higher modeled gross principal when the borrower still needs the same net amount.

For example, if the borrower needs $25,000 and a lender withholds an exact $500 fee, a $25,000 gross loan would deliver only $24,500 under that simplified treatment. This model instead uses a $25,500 principal so the two offers still supply matched proceeds. If a lender calculates the fee as a percentage of gross principal, enter the exact dollar fee from the transaction disclosure; do not enter the percentage in a dollar field.

The fee treatment can make two offers with the same headline amount economically different. The structured result therefore shows usable proceeds, contract principal, cash fee, and interest attributable to a financed fee separately.

Interest rate and APR are not interchangeable

The contract or note rate drives the scheduled amortization payment. APR is a broader annualized measure that can incorporate certain lender charges. The CFPB’s explanation of loan interest rate versus APR says both are important measures and warns consumers to compare APR with APR rather than APR with an interest rate.

The old version of this page used an input labeled APR directly as the payment rate and then added fees again. That could mix two different measures or double-count a charge already reflected in APR. The current workflow requires the contract rate for payment math, records disclosed APR only as a separate reference, and explicitly counts the entered mandatory fee once according to its cash treatment.

If a written offer supplies only APR but no contract rate or payment schedule, obtain the missing terms before using this amortization model. Do not reverse-engineer a contractual payment from APR when the disclosure has already calculated it using rules and finance charges the page cannot infer.

Monthly payment is only one layer of the decision

A longer term often produces a smaller scheduled payment while increasing total interest. The CFPB’s guidance on comparing auto-loan offers recommends examining amount financed, APR and interest rate, term, and monthly payment, and it demonstrates how a longer term can substantially increase total interest even when the payment falls.

The result therefore reports payment, first-payment principal and interest, full-term interest, mandatory fee, total borrowing cost, and total cash outflow. “Lower payment” and “lower cost” are separate conclusions. A lower payment can improve immediate cash flow without making the contract less expensive. A higher payment can shorten the term and reduce interest but still fail a household budget.

Full-term cost compares complete payoff paths

Full-term borrowing cost equals all modeled scheduled payments plus any fee paid separately, minus the common usable proceeds. For a separately paid fee, that is interest plus the cash fee. For a financed or withheld fee, scheduled payments repay the fee-increased principal and its interest, so subtracting only usable proceeds captures the fee and financing cost without adding the same fee again.

This comparison answers what happens if each loan runs to its contractual payoff. When Offer A lasts 36 months and Offer B lasts 60 months, their costs span different lengths of time. That can be appropriate when the real choice is to follow either complete schedule, but it does not answer which is cheaper if the borrower expects to refinance, sell collateral, or repay both loans after 24 months.

Use an equal-time horizon for an expected early payoff

The optional horizon creates a balance-aware comparison at the same month. For each offer, the model adds scheduled payments through that month, any fee paid separately, and the remaining principal needed to pay off the modeled balance. It subtracts the common usable proceeds, leaving interest and fee cost accumulated through the hypothetical payoff.

This prevents a common mistake: comparing payments made while ignoring the fact that the lower-payment offer may leave a larger unpaid balance. It also avoids comparing Offer A at its full term with Offer B after only part of its term. If the horizon extends beyond an offer’s contractual payoff, that offer simply has no remaining balance or additional modeled payments.

For mortgages, the CFPB recommends examining a consistent five-year interest-and-fee measure when comparing Loan Estimates, while acknowledging that an individual time horizon can differ. This generic calculator does not reproduce the official Loan Estimate “In 5 years” disclosure, but it follows the same decision principle: compare costs over the period the borrower realistically expects to keep the loan.

Read the cost-crossover result carefully

A lower-rate offer can begin with a higher fee. The accumulated-cost check starts with each mandatory fee, then adds modeled interest month by month. It reports the first month when the initially higher-fee path catches the initially lower-fee path, or says that no crossover occurs before both contractual terms end.

A crossover is not a break-even on the borrower’s entire financial decision. It excludes opportunity cost, taxes, collateral value, insurance, prepayment charges, closing cash, optional products, and uses a simplified monthly interest schedule. It is a diagnostic showing when modeled interest savings recover a mandatory fee difference.

Enter mandatory fees, not every adjacent purchase

The CFPB notes that personal installment loans can include fees such as origination and documentation charges and advises checking lender disclosures. Enter mandatory lender fees needed to obtain the quoted loan. Use the same scope for both offers.

Do not automatically include optional credit insurance, service contracts, warranties, maintenance packages, or other add-ons that can be declined. If an optional product changes the rate or approval conditions, obtain written versions with and without it. For an auto purchase, keep vehicle price, trade value, taxes, negative equity, and optional products in the auto loan calculator; this page isolates financing offers with matched usable proceeds.

What this fixed-rate model excludes

The formula assumes a fixed contract rate, monthly interest equal to one-twelfth of the annual rate, level scheduled payments, no late payments, and a final payment reduced to the exact amount due. Real contracts may use daily simple interest, different payment allocation, odd first periods, prepaid interest, rounding conventions, or payment dates that shift total interest.

Variable rates, adjustable-rate mortgages, balloon payments, interest-only periods, deferred interest, negative amortization, revolving credit, payment holidays, subsidized or forgivable loans, prepayment penalties, collateral risk, tax consequences, and future late fees are outside the model. A fee deduction that depends on a percentage of gross principal needs the exact disclosed dollar amount. A prepayment penalty can invalidate the horizon comparison and must be evaluated separately.

A source-first loan comparison workflow

  1. Obtain two written offers for the same borrower, purpose, and usable proceeds.
  2. Confirm the fixed contract interest rate and whole-month term for each offer.
  3. Record disclosed APR separately and compare APR with APR.
  4. Identify mandatory lender fees and whether each is cash-paid, added to principal, or withheld.
  5. Enter a realistic equal-time horizon only when early payoff, sale, or refinancing is part of the decision.
  6. Compare scheduled payment, full-term cost, horizon cost, remaining balance, and accumulated-cost crossover.
  7. Reconcile every result with amount financed, finance charge, payment schedule, and other written disclosures before accepting an offer.

Official references used for this workflow

This calculator provides educational fixed-rate arithmetic, not lending, underwriting, financial, tax, credit, insurance, or legal advice. It is not a loan offer, required disclosure, approval, or recommendation. Verify amount financed, finance charge, APR, payment schedule, fees, collateral, optional products, and early-payoff terms in the complete written contract.