Loan Calculators for Payments, Interest and Amortization

Use the exact note rate, the exact amount financed and the term in months, then apply the standard amortization formula, which is what the calculators here do. Small differences from a lender's figure usually come from rounding, the number of days before the first payment, or fees added to the balance. The lender's disclosure is the final word.

They may round the payment differently, assume a different first-payment date, use a different day-count method or include fees. A difference of a few dollars is rounding; a difference of hundreds usually means a different rate, term or treatment of fees. Check the assumptions each tool states. When in doubt, rely on the lender's disclosure.

For the principal-and-interest part of a fixed-rate mortgage, yes. They do not include property taxes, homeowners insurance or mortgage insurance, which often make up a large part of a monthly housing payment. Adjustable-rate mortgages can only be estimated one rate scenario at a time. Add those costs separately to estimate the full monthly housing bill.

It is paying off a loan with equal regular payments that each cover the interest due and chip away at the principal. Early payments are mostly interest; later ones are mostly principal. By the final payment, the balance reaches zero. Nearly every calculator in this section is built on it.

For total interest, the term often matters as much as or more than the rate, because each extra year keeps a balance outstanding. For the monthly payment, a longer term lowers it while a higher rate raises it. Running both changes in the comparison calculator shows which effect dominates for your loan.

Yes. The remaining-balance calculator finds what you still owe and the interest left, and the payment-breakdown tool shows how each payment splits. Together they help you decide whether to pay extra, refinance, or simply understand why the balance is moving slowly. They can also help you check whether your statements look right.

Most payment calculations here use only the amount, rate and term. Fees paid in cash at closing do not change the payment but do raise the cost of the loan, which the total-cost calculator captures. Fees rolled into the balance raise both, so enter the full amount financed. Comparing APRs between offers helps reveal fee differences.

For fixed-rate, fully amortizing business loans, yes. Commercial loans often use a 365/360 day count or a balloon payment, so check the 365/360 calculator for the day-count effect and be aware that a balloon structure leaves a lump sum the standard schedule does not show. Ask the lender for the full amortization schedule as well.

No. They are educational estimates based on the numbers you enter and the assumptions each page states. They show trade-offs so you can ask better questions; your lender's disclosures, and a qualified professional for tax questions, should confirm any decision. Use them to understand your options before speaking with a lender, and to check that the figures you are quoted make sense.