🏢Business Loan Calculator

Our business loan calculator goes beyond the simple monthly payment to show you the true cost of borrowing. A small business loan calculator that only shows the payment hides the impact of origination fees, documentation charges, and the difference between stated interest rate and actual APR. For any lender comparison to be meaningful, you need to see the true APR — the single number that accounts for all costs — not just the advertised rate.

Types of Business Loans and How Payments Are Structured

Business loans come in several structural varieties, each with different payment mechanics and risk profiles. Understanding the structure before calculating the payment is essential to choosing the right product for your business's cash flow.

A fully amortizing term loan, the standard structure for SBA 7(a) loans and most conventional bank loans, requires equal periodic payments that cover both interest and principal throughout the term. Each payment reduces the outstanding balance, and the interest portion declines over time while the principal portion increases — the standard amortization pattern. By the final payment, the balance reaches exactly zero. This structure is predictable and straightforward to budget.

An interest-only loan requires payments that cover only the interest accruing on the balance, with the full principal due as a balloon payment at the end. This structure lowers periodic payments but creates a significant refinancing or repayment obligation at maturity. It is common in short-term bridge financing, commercial real estate, and working capital lines of credit where the borrower expects the principal to be repaid from a specific event (a sale, a contract payment, or a refinancing).

A balloon loan combines a period of interest-only payments with a large lump sum due at a specified date before the notional term. A five-year term with a three-year balloon, for example, requires three years of interest-only payments followed by full principal repayment — even though the loan was originally structured for five years. This creates refinancing risk if credit conditions tighten before the balloon date. Use the payment frequency toggle in this business loan payment calculator to model weekly or bi-weekly payment structures, which some online lenders prefer for cash-flow management.

Origination Fees and How They Raise Your True APR

The origination fee is one of the most important costs to understand when comparing business loan offers. It is a one-time charge, expressed as a percentage of the loan amount, deducted from the proceeds before the money is disbursed to your business. A 2% origination fee on a $150,000 loan means you receive $147,000 but make payments based on $150,000.

This creates a spread between the stated interest rate and the true APR. The fee effectively increases your cost of funds because you are paying interest on $150,000 while only having use of $147,000. The shorter the loan term, the larger the APR impact, because the fee is spread over fewer payment periods. A 2% origination fee on a 1-year loan adds approximately 3.5–4% to the effective APR. The same fee on a 10-year loan adds only about 0.35–0.40%.

This is why comparing only the stated rate across lenders is misleading. A lender offering 7.5% with a 3% origination fee may be significantly more expensive than a lender offering 8.5% with no origination fee, particularly for short-term loans. Use the APR output from this calculator — calculated using the same Newton-Raphson method required under the Truth in Lending Act for consumer loans — to make genuine apples-to-apples comparisons. Always ask any lender what fees are included in their quoted APR and what fees are not.

SBA Loans: Rates, Fees, and How to Calculate SBA Payments

SBA 7(a) loans are partially guaranteed by the Small Business Administration, which allows participating lenders to offer longer terms and lower rates than would otherwise be available to small businesses. As of 2024–2025, SBA 7(a) loan rates are typically prime rate plus 2.25% to 4.75% depending on loan size and term, with the prime rate fluctuating with Federal Reserve policy. For loans over $50,000, the rate cap is prime + 2.75% for terms under seven years and prime + 3.25% for terms over seven years.

SBA 7(a) loans carry a guarantee fee based on the loan amount and term. For loans between $150,000 and $700,000, the upfront guarantee fee is typically 2%–3% of the guaranteed portion. For loans above $700,000, the fee can reach 3.5%. These fees function exactly like origination fees from a true APR perspective: they reduce the net proceeds while the payment is based on the full loan amount. Always enter these guarantee fees in the origination fee field when modeling an SBA loan to see the true borrowing cost. Use our APR calculator if you need to model a non-standard fee structure.

SBA loan terms extend up to 25 years for real estate and 10 years for equipment and working capital. Longer terms dramatically reduce monthly payments but increase total interest cost. A $200,000 SBA loan at 10.5% costs $6,649 per month on a 36-month term (total interest: $39,367) versus $2,149 per month on a 120-month term (total interest: $57,912). The 10-year option saves $4,500 per month but costs an extra $18,500 in interest — a trade-off worth modeling explicitly before choosing.

Prepayment Penalties and Early Payoff Planning

Many business loans, particularly those from online lenders and alternative finance providers, include prepayment penalties that charge a percentage of the remaining balance if the loan is paid off early. Prepayment penalties protect the lender's expected interest income. They can range from 1% to 5% of the outstanding principal and are sometimes structured as a declining schedule (5% in year one, 4% in year two, and so on).

If you anticipate paying the loan off early — because a revenue milestone, a business sale, or a refinancing opportunity may arise — the prepayment penalty is a critical cost to model before signing. A 3% prepayment penalty on a $150,000 loan is $4,500, which may or may not be justified by the interest savings from early payoff depending on how early the payoff occurs.

SBA loans generally do not allow prepayment penalties on loans with maturities under 15 years. For SBA loans with maturities of 15 years or more, prepayment penalties apply only in the first three years: 5% in year one, 3% in year two, and 1% in year three. Conventional bank loans and online lenders operate under different rules, so always review the specific loan agreement. Use our loan payoff calculator to model early payoff scenarios and calculate the break-even between prepayment penalty cost and interest savings.

Fixed vs. Variable Rate Business Loans

A fixed-rate business loan locks your interest rate for the entire loan term, making every payment identical and the total interest cost fully predictable at origination. Fixed rates provide certainty for budgeting and protect against rising rates. The tradeoff is that fixed rates at origination are typically slightly higher than variable rates, and you do not benefit if rates fall during the loan term.

A variable-rate loan, often tied to the prime rate or SOFR (Secured Overnight Financing Rate, which replaced LIBOR), adjusts periodically as the benchmark rate changes. Variable rates often start lower, but your payment can increase significantly if rates rise. SBA 7(a) loans are predominantly variable rate, adjusting quarterly.

This calculator models fixed-rate loans. For a variable-rate loan, model the current payment using the current rate, then run a separate scenario with a rate 1.5%–2% higher to stress-test your cash flow against potential rate increases. If the higher-rate scenario breaks your ability to service the debt, consider a fixed-rate product even at the slightly higher initial rate. A business's cash flow durability under stress is a more important consideration than the initial payment optimization.

Using Business Loan Calculations for Lender Comparison

When comparing multiple loan offers, the only fair comparison is on total cost including all fees and the true APR. Run each offer through this calculator with its specific origination fee, documentation fee, and rate. The lender with the lowest stated rate is not necessarily the cheapest. The lender with the lowest true APR on your specific loan amount and term is.

Also compare the total interest cost over the life of the loan, not just the APR. Two loans with identical APRs but different terms will have very different total interest costs. And consider the payment amount relative to your business's monthly cash flow — the lowest payment is not always optimal if it comes with a longer term that significantly increases total interest paid. A useful rule of thumb: total debt service (all loan payments) should not exceed 40–45% of your monthly net cash flow, leaving adequate buffer for operating expenses and unexpected costs. Pair this calculator with our affordability calculator if you need to model the combined impact of business and personal debt obligations.