Free commercial loan calculator to estimate your monthly payments, total interest, and check your bank approval odds. Enter your business financials and loan details to see your Debt Service Coverage Ratio (DSCR) in real time.
📊 Business Financials
Your average monthly cash flow before this new loan.
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🏦 Loan Details
The financing you want to apply for.
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✅Enter your numbers above to check your approval odds.
Estimated Monthly Payment
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Principal and interest per month
Bank Approval Odds (DSCR)
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Affordability Reality Check
How your monthly net income compares against the new loan payment, and how much breathing room you have left over each month.
Monthly Net Operating Income--
New Monthly Loan Payment--
Monthly Breathing Room
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This is what stays in your business each month after making the loan payment.
Total Interest Paid
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Total Cost of Loan
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Monthly Net Operating Income
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Borrowing for a personal, auto, or home purchase instead of your business? See also the Loan Calculator for a general payment and interest breakdown that is not tied to business cash flow.
Key Terms Explained
DSCR (Debt Service Coverage Ratio)
Your monthly net operating income divided by your monthly loan payment. It tells a lender how comfortably your business income covers the debt. A DSCR of 1.25 means you earn 1.25 dollars for every 1 dollar of payment.
Net Operating Income (NOI)
Your average monthly gross revenue minus your average monthly business expenses. This is the cash your business actually produces before the new loan payment, and it is the number lenders use to test affordability.
Amortization
The process of repaying a loan through fixed, equal monthly payments over the term. Each payment covers interest first, with the remainder reducing the principal balance until the loan reaches zero.
Principal
The original amount of money you borrow, before interest. On a 50,000 dollar loan, the principal is 50,000 dollars. Your total cost is the principal plus all the interest paid over the term.
SBA Loan
A small business loan partially guaranteed by the U.S. Small Business Administration. The guarantee lowers lender risk, so SBA loans often carry longer terms and lower down payments than a standard bank loan, in exchange for more paperwork.
Collateral
A business or personal asset, such as equipment, real estate, or inventory, that you pledge to secure a loan. If you default, the lender can seize the collateral to recover its money, which reduces its risk and can improve your terms.
The Complete Guide to Business Loan Affordability
Before a bank lends your business a single dollar, it asks one core question: can your cash flow comfortably cover the payment? This calculator answers that question the same way a commercial loan officer does, by measuring your Debt Service Coverage Ratio (DSCR). Enter your revenue, your expenses, and the loan you want, and you will instantly see your monthly payment, your approval odds, and exactly how much breathing room you have left each month.
How to Use This Calculator
Start in the Business Financials panel. Enter your average monthly gross revenue and your average monthly business expenses. The calculator subtracts the two to find your monthly Net Operating Income (NOI), which is the cash your business produces before the new loan.
Next, fill in the Loan Details panel: the loan amount you want, the annual interest rate, and the term in years. Use the quick-select buttons for the most common business loan terms of 3, 5, and 10 years, or type any term you like. Everything recalculates in real time as you type, so there is no submit button to press.
The hero section shows your estimated monthly payment alongside your DSCR, the single number banks care about most. Below it, the Affordability Reality Check compares your net income against the payment so you can see your remaining monthly cushion at a glance.
How the Math Works
Your monthly payment uses the standard amortization formula that every lender uses: the loan amount times the monthly rate, adjusted for the number of months in the term. Total interest is simply every payment added up, minus the amount you originally borrowed. The DSCR is your monthly NOI divided by that monthly payment, rounded to two decimal places.
For example, a business earning 20,000 dollars in revenue with 15,000 dollars in expenses has a monthly NOI of 5,000 dollars. On a 50,000 dollar loan at 8.5 percent over 5 years, the monthly payment is roughly 1,026 dollars, producing a DSCR near 4.87. That is far above the 1.25 threshold, so approval odds are excellent.
Why 1.25 Is the Magic Number
Most banks and SBA lenders require a DSCR of at least 1.25 to approve a business loan. The extra 0.25 above breaking even is a deliberate safety buffer. It assumes your revenue might dip, an unexpected expense might hit, or interest rates might rise, and confirms your business can still make the payment. A DSCR below 1.0 means your income does not even cover the payment, which is an almost automatic denial unless you add collateral or a strong co-signer.
What This Calculator Does Not Include
This tool estimates affordability from cash flow alone. It does not account for personal credit scores, time in business, industry risk, origination fees, down payments, personal guarantees, or collateral. Real lenders weigh all of those factors too. Treat your DSCR result as a powerful first signal, then confirm the full picture with your lender or an SBA-approved lending partner.
Frequently Asked Questions
Most banks and SBA lenders want to see a Debt Service Coverage Ratio (DSCR) of at least 1.25. A DSCR of 1.25 means your business produces 1.25 dollars of net operating income for every 1 dollar of loan payment, leaving a 25 percent safety cushion. A ratio of exactly 1.0 means you break even with no buffer, which lenders consider risky. Below 1.0 means your income does not cover the payment, and approval is unlikely without additional collateral or a co-signer.
An SBA loan is a loan made by a bank or lender but partially guaranteed by the U.S. Small Business Administration. That government guarantee lowers the lender's risk, so SBA loans usually offer longer terms, lower down payments, and more flexible qualification than a traditional bank loan. The trade-off is more paperwork and a slower approval process. A traditional bank loan is funded entirely by the bank, often closes faster, but typically requires stronger financials, more collateral, and a higher DSCR to qualify.
Banks size your loan around your business cash flow, not just the amount you request. They calculate your net operating income (revenue minus expenses) and confirm that it comfortably covers the proposed monthly payment, usually requiring a DSCR of 1.25 or higher. They also weigh your time in business, personal and business credit scores, available collateral, and the industry you operate in. If the payment on your requested amount pushes your DSCR below their threshold, they will offer a smaller amount or a longer term to bring the ratio back into range.
No. This calculator estimates affordability based purely on your business cash flow and the loan terms you enter. It does not factor in personal guarantees, real estate or equipment collateral, credit scores, or lender-specific fees. Almost all small business and SBA loans require a personal guarantee from owners with a 20 percent or greater stake, and many require collateral. Treat the DSCR result as a strong first signal of approval odds, then confirm the full requirements with your lender.
This tool is for educational and estimation purposes only and is not financial advice or a loan offer. DSCR thresholds, qualification rules, fees, and rates vary by lender. It is not affiliated with the U.S. Small Business Administration. Consult a licensed lender or financial advisor before making borrowing decisions.