Business Loan Affordability Calculator
Work backward from your cash flow to find the maximum business loan amount you can afford.
How to Use This Calculator
Enter your monthly gross revenue, the total income your business generates before any expenses. Use an average month if your revenue fluctuates seasonally. For seasonal businesses, consider using your lowest revenue month to stress-test affordability.
Enter your monthly operating expenses, including rent, payroll, utilities, insurance, supplies, and all recurring costs except existing debt payments. Existing debt is entered separately so the calculator can isolate your available cash flow accurately.
Enter any existing monthly debt payments, including current loan payments, equipment leases, and any other fixed debt obligations. Credit card minimum payments should be included if you carry a balance.
Set a target debt service coverage ratio (DSCR). The DSCR measures how much cash flow cushion exists above your debt payments. A DSCR of 1.0 means every dollar of available cash flow goes to debt service, leaving no margin. A DSCR of 1.25 means you have 25% more cash flow than required for debt payments. Most lenders require a DSCR between 1.15x and 1.50x depending on loan type.
Finally, enter the estimated interest rate and loan term you expect. The calculator uses these to translate your affordable monthly payment into a maximum loan amount. Try multiple rate and term combinations to see how they affect your borrowing capacity.
What Lenders Look at When Sizing a Loan
Lenders fundamentally want to answer one question: can this business generate enough cash flow to make the payments reliably? The debt service coverage ratio is their primary tool for answering it.
SBA lenders typically require a minimum DSCR of 1.15x to 1.25x. The SBA's Standard Operating Procedure guidance allows flexibility, but most participating lenders set their own floors within this range. SBA loans generally accept lower coverage ratios than conventional loans because the government guarantee reduces lender risk.
Conventional bank lenders usually require 1.25x to 1.50x DSCR. Banks without a government guarantee need a larger cash flow cushion to offset their full exposure to default risk. Higher-risk industries or newer businesses may face requirements at the top of this range or higher.
Online and alternative lenders often accept DSCR as low as 1.0x to 1.15x, compensating for higher risk through higher interest rates and shorter terms. Some revenue-based lenders focus more on revenue consistency than traditional DSCR calculations.
Beyond DSCR, lenders evaluate collateral (assets that secure the loan), credit history (personal and business), industry risk, and time in business. Strong performance in these areas can sometimes offset a borderline DSCR, while weakness in multiple areas may require a higher coverage ratio than the lender's standard minimum.
How to Improve Your Borrowing Capacity
If the calculator shows a lower loan amount than you need, there are concrete steps to increase your qualifying capacity. Each lever either increases available cash flow or reduces the payment required per dollar borrowed.
Increase revenue before applying. Even modest revenue growth over 3 to 6 months improves your DSCR and demonstrates positive trajectory. Lenders look at trailing financials, so improvements need to show up in your bank statements and tax returns before they count.
Reduce operating expenses. Every dollar of expense reduction flows directly into available cash flow. Review subscriptions, renegotiate vendor terms, and eliminate costs that do not directly support revenue generation. A $500 monthly expense reduction increases your annual qualifying cash flow by $6,000.
Pay down existing debt. Reducing or eliminating current debt payments frees up cash flow for a new loan. If you have a small-balance loan with a few months remaining, paying it off before applying can meaningfully increase your capacity.
Choose a longer loan term. Extending the term from 5 years to 10 years can increase your qualifying loan amount by 60-70%, because the same monthly payment services a larger principal balance. The trade-off is more total interest paid over the life of the loan.
Improve your interest rate. Better credit scores, stronger financials, or SBA-guaranteed products can lower your rate. Each percentage point of rate reduction increases your qualifying amount by approximately 8-12% on a 10-year term. Spending 6 months improving your credit profile before applying can be more valuable than any other single action.
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This estimate is based on cash flow alone. A lender will also evaluate credit, collateral, and industry risk.
Get Matched to Loan Options That Fit Your Cash FlowFrequently Asked Questions
What is a good debt service coverage ratio for a small business loan?
A DSCR of 1.25x is a solid target for most business loan applications. It means your business generates 25% more cash flow than needed to cover all debt payments, giving lenders confidence in your ability to repay even during slower months. SBA loans may accept 1.15x to 1.25x, conventional banks typically want 1.25x to 1.50x, and online lenders may work with ratios as low as 1.0x. Aim for the highest DSCR you can achieve, as a stronger ratio often leads to better terms.
Should I use my best month or worst month for revenue in this calculator?
Use your average monthly revenue over the past 12 months as the baseline, then test with your worst month to stress-test affordability. Lenders will review 12 to 24 months of bank statements and calculate their own average. If your business is highly seasonal, some lenders annualize revenue and divide by 12, while others weight recent months more heavily. Running the calculator at both your average and your lowest month shows you the range between your qualifying capacity and your comfort capacity.
How do lenders verify the income and expense numbers I provide?
Lenders verify your financials through multiple documents: 2 to 3 years of business and personal tax returns, 3 to 12 months of business bank statements, a current profit and loss statement, and a business debt schedule. They reconcile the numbers across these sources to check for consistency. Bank statement deposits are compared against reported revenue, and regular outflows are matched against stated expenses. Material discrepancies between your application and the supporting documents will delay or deny the loan.
Does existing debt always reduce how much I can borrow?
Yes, because existing debt payments reduce the cash flow available for new debt service. However, the impact varies. A loan with 3 months remaining reduces your capacity far less than one with 5 years left, because lenders may exclude debts that will be paid off shortly after the new loan funds. Some lenders also allow debt consolidation, where the new loan pays off existing obligations, effectively removing them from the calculation and potentially increasing your net borrowing capacity.
Why does a longer loan term let me borrow so much more?
Longer terms spread the principal repayment over more months, which reduces the monthly payment per dollar borrowed. If your affordable monthly payment is $5,000 at a 7% rate, a 5-year term supports roughly $253,000 in principal, while a 10-year term supports roughly $431,000. That is a 70% increase in borrowing capacity from the same monthly payment. The trade-off is total interest cost: the 10-year loan costs significantly more in total interest. The right choice depends on whether you need maximum loan size or minimum total cost.
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