Interest Rate Comparison Calculator

Test monthly payments, total interest, and loan cost instantly. Compare lenders with side-by-side results today. Choose the lowest overall borrowing path before you commit.

Compare up to three loan offers

Use the same loan amount and term to compare rate, APR impact, fees, and payoff behavior.

Loan settings

Tip: compare offers using the same loan amount and term. Use extra payments only when you want to model faster payoff.

Offer 1

Offer 2

Offer 3

Example data table

Lender Rate Fees Points Extra Payment Finance Charges?
Metro Credit 6.75% $250 0.50% $0 No
Blue Oak Lending 6.45% $550 1.00% $25 No
North Star Finance 6.95% $100 0.00% $75 Yes

Formula used

Monthly rate: r = annual rate / 12 / 100

Standard payment: M = P × [r(1+r)^n] / [(1+r)^n - 1]

Zero-rate payment: M = P / n

Total borrowing cost: lifetime cash outflow − original loan amount

APR estimate: a monthly internal-rate calculation based on net proceeds and the generated payment stream.

When fees are financed, the balance increases. When fees are paid upfront, net proceeds decrease. Both situations change the effective borrowing cost.

How to use this calculator

  1. Enter the loan amount and full term in months.
  2. Add up to three offers with each lender’s annual rate, flat fees, and discount points.
  3. Enter an optional extra monthly payment if you want to model faster payoff.
  4. Check the financed charges box when fees and points will be rolled into the loan balance.
  5. Submit the form to view monthly payment, APR estimate, payoff time, interest, and total borrowing cost.
  6. Use the chart, comparison table, and export buttons to review or share results.

FAQs

1) What should I compare first?

Start with total borrowing cost, then check payment size and APR. A loan with a lower rate can still cost more when fees, points, or financed charges raise the balance.

2) Why can a lower interest rate still cost more?

Fees and points change what you really receive or repay. A slightly lower rate may lose its advantage when closing charges or financed costs are heavier.

3) Should I finance fees and points?

Financing charges reduces cash needed at closing, but it increases the balance and can create interest on those charges. Compare both ways before deciding.

4) What does extra monthly payment change?

Extra payment shortens payoff time and usually lowers total interest. This calculator applies the extra amount each month and adjusts the final installment automatically.

5) Is the APR here exact?

It is an estimate from generated cash flows and net proceeds. A lender’s disclosed APR can differ because of timing rules, insurance, or regulated calculation details.

6) Does this include taxes, penalties, or insurance?

No. The comparison focuses on principal, interest rate, fees, points, financed charges, and optional extra payments. Add outside costs separately when they apply.

7) Which offer is best?

The best offer depends on your goal. Pick the lowest total cost for savings, the lowest payment for cash-flow relief, or the shortest payoff for faster debt reduction.

8) Can I compare more than three offers?

This version compares three offers at once for clarity. Reuse the form with new numbers or duplicate the offer card pattern to expand it.

Related Calculators

Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.