How this calculator works
Enter the principal you expect to borrow, an annual interest rate, and the number of monthly payments. The calculator converts the annual rate to a monthly rate and applies the standard fixed-payment amortization formula. Each payment first covers that month's interest; the remainder reduces principal. The schedule repeats this process until the balance is paid off.
The total interest is the sum of the scheduled interest amounts over the selected term. This is an estimate for a conventional fixed-rate, fully amortizing loan with monthly payments. It does not include origination fees, closing costs, variable-rate changes, balloon payments, late fees, or lender-specific day-count rules.
When the rate is zero, the payment is principal divided evenly over the term. The amortization table is useful for understanding the direction of your balance, not a lender's payoff quote. Always compare the annual percentage rate, fees, repayment conditions, and prepayment rules in the actual offer.
What the results mean
Monthly payment is the scheduled amount under the entered assumptions. Total interest describes the financing cost over the full term, while the balance schedule shows how slowly or quickly principal falls. A longer term often lowers each payment but increases total interest; a shorter term often does the reverse.
Use payment affordability alongside revenue timing. A business can be profitable on paper and still struggle to make a payment if client receipts arrive late or costs are seasonal. Consider a conservative cash-flow scenario before taking on a fixed obligation.
Common mistakes to avoid
Do not compare offers by monthly payment alone. Compare total repayment, fees, rate type, collateral, guarantees, and prepayment terms.
Do not use a fixed-rate amortization result as a payoff quote or as a model for a variable-rate, interest-only, or revolving facility.
Do not assume the displayed payment includes lender fees or that approval and affordability are determined by the calculator.
Compare offers carefully
Ask lenders for a complete written repayment schedule and the total amount payable. Confirm whether the rate is fixed, whether payments are monthly, and whether a personal guarantee or collateral is required. A low headline rate may not mean a low total cost after fees.
This calculator is a comparison aid, not loan advice or an approval decision. If the loan is secured or a material commitment for your business, review the documents with an independent adviser before signing.
Evaluate affordability beyond the monthly payment
A payment can fit the average month but become difficult during a slow season. Compare the schedule with cash receipts and obligations already committed, and test a lower-revenue month. Include costs that arrive quarterly or annually so the business does not mistake a strong balance today for dependable capacity to repay.
The amortization schedule shows the split between principal and interest under a fixed-rate assumption. Early payments usually include more interest because the outstanding balance is larger. As principal declines, the interest portion tends to fall. Actual lender statements can differ because of payment dates, rounding, fees, payment holidays, or how the agreement accrues interest.
Compare the full cost of multiple offers, not only the advertised rate. Ask for the annual percentage rate where available, total scheduled repayment, origination and broker fees, required collateral, personal guarantees, prepayment charges, and conditions that could change the rate. Read the contract's default and acceleration terms carefully.
Borrowing can support equipment, working capital, or a planned expansion, but financing does not make an unprofitable activity profitable by itself. Write down what the funds will enable, how the benefit will be measured, and what happens if the investment takes longer than expected to generate revenue.
If the proposed amount or guarantee could put personal assets at risk, pause for independent advice. The calculator cannot assess creditworthiness, suitability, lender conduct, or legal enforceability. Use the estimate as a comparison aid and obtain an official schedule and tailored professional guidance before signing.
A borrowing decision also affects the business's flexibility. Ask what covenants or reporting obligations continue after funding and whether a late payment could trigger additional costs. Keep a copy of the signed agreement and payment schedule somewhere accessible to the people responsible for cash management. If a lender's offer differs from the assumptions entered here, rerun the estimate with the final terms rather than relying on an earlier comparison.
This estimate assumes the entire principal is paid out at the beginning and repaid in equal monthly installments. A line of credit, interest-only period, deferred draw, balloon balance, or additional principal payment follows a different pattern. Use the calculator only when its structure resembles the offer, and ask the lender to explain any term that changes how interest accrues.
Frequently asked questions
Is the interest rate entered monthly or annually?
Enter the nominal annual interest rate as a percentage; the calculator converts it to a monthly rate.
Does the payment include fees?
No. Origination and other lender fees are not included in this standard amortization estimate.
Why does a longer loan have more total interest?
Principal remains outstanding for more payment periods, so interest generally accumulates for longer.
Can I use this for a variable-rate loan?
Only as a snapshot at the rate entered. A changing rate will change future payments or the payoff timeline.
Is the amortization schedule an official payoff amount?
No. Request an exact payoff statement from your lender for settlement or accounting purposes.
This page is educational information, not individualized tax, legal, or financial advice. Verify current rules with the relevant authority or a qualified professional.
Official sources and further reading
Use current official guidance to confirm rules for your circumstances: