How Much Should Your Business Borrow? Debt Capacity, Fixed vs Floating Rates, and Covenant Headroom

Borrowing lets a business grow faster than its retained cash allows, but it adds fixed payments to a business whose income is not fixed. Deciding how much to borrow comes down to a few measurable questions: how much debt the cash flow supports, what happens to the payments if interest rates rise, how far results can fall before a covenant is breached, and whether the loan will need refinancing at a bad moment.

This guide covers those questions with a worked example. For the loan products themselves, including SBA 7(a) and 504 terms, bank and online lenders, and a cost comparison, see our small business loans guide. Larger companies borrowing from private funds should read our guides to private debt and mezzanine financing.

When borrowing makes sense

Debt suits spending that produces cash on a schedule you can predict: equipment that raises output, a second location in a market you already know, inventory for confirmed orders, or the purchase of a profitable business. It suits spending with uncertain or distant payoffs poorly, such as funding operating losses, an unproven product, or payroll through a slow patch. A loan used for those has no new cash flow to repay it, so repayment comes out of the existing business.

Two quick tests before you size anything:

• Does the project's expected return, after tax, clearly exceed the after-tax interest rate? If the margin is thin, a small delay or cost overrun turns the loan into a drag.
• Would the business survive if the project produced nothing for a year? If not, the project is a candidate for equity, or for a smaller first step.

Debt capacity: three methods, use the lowest

Lenders size loans in several ways and lend the smallest amount the tests allow. You should do the same before you talk to them.

Illustration: a business with $4.0 million of EBITDA, $0.8 million of annual capital spending it needs to stay in business, and $0.4 million of cash taxes. Its cash flow available for debt service is $2.8 million. Assume a floating rate of SOFR (3.90%) plus 3.00%, or 6.90%.

The table shows how much the answer depends on the method and the term. The same payment supports $9.5 million over five years and $12.4 million over seven. Leverage multiples ignore the term altogether, which is why lenders use them together with coverage tests. The stress row is the one lenders rarely compute for you: it asks what the business could carry in a bad year without defaulting.

Market norms vary by size. Prairie Capital's Winter 2026 middle-market report put average total debt for sponsored middle-market deals at 3.9 times EBITDA in the second quarter of 2025. That is a benchmark for middle-market companies with steady cash flows. Owner-operated small businesses borrowing from banks usually face lower multiples and stricter coverage requirements, and the SBA's own minimum coverage is 1.15 times for standard 7(a) loans.

Based on the three methods, the business in the illustration might settle on $10 million: below every capacity figure, at 2.5 times EBITDA.

Fixed or floating

Most bank term loans and lines of credit float over SOFR or the prime rate. SOFR was 3.90% on September 28, 2026 (FRED), down from 4.24% a year earlier and from a peak of 5.40% on December 28, 2023. It is not moving in one direction: the Federal Reserve's target range rose from 3.50%-3.75% to 3.75%-4.00% during September 2026 (FRED), and the prime rate moved from 6.75% to 7.00% with it.

Fixed rates follow longer-term yields, and those have risen faster. The 5-year Treasury yield was 5.06% on September 28, 2026, up from 3.51% at the end of February (FRED). With the yield curve that steep, a fixed-rate loan or an interest rate swap costs noticeably more than floating at the start.

The choice turns on how much a rate rise would hurt you:

• Float if your coverage stays comfortable after a 2 to 3 point rise, you expect to repay early, or your revenue tends to rise with inflation and rates.
• Fix, or hedge with a swap or cap, if the rate shock test below pushes coverage near your covenant, or if the loan finances a long-lived asset with fixed income such as a leased building.
• Splitting the debt, part fixed and part floating, is common and limits regret in either direction.

Read the prepayment terms of any fixed-rate loan. Many carry prepayment penalties or swap breakage costs, and if rates fall you may owe a sizable payment to get out.

A rate-shock test

Illustration, continued: the $10 million loan has a 5-year term, repays $1 million of principal a year, and leaves a $5 million balloon at maturity. It floats at SOFR plus 3.00%. The table shows year-one debt service coverage (cash flow for debt service divided by principal plus interest) under rate increases and EBITDA declines.

A rate rise alone does not threaten this borrower: even at +3 points, coverage is 1.44 times. The damage comes from the combination. EBITDA down 15% with rates up 2 points drops coverage to 1.19 times, below a typical 1.20 times fixed charge covenant. EBITDA down 25% with any rate rise leaves the business unable to cover its payments from operations.

Fixing the rate changes the bad case. If the whole loan were fixed at 7.60% (our assumption for a 5-year fixed quote with the 5-year Treasury near 5.06%), year-one interest would be about $0.72 million, $67,000 more than floating today. In the worst row, EBITDA down 25% and SOFR up 3 points, coverage would be 1.05 times instead of 0.93. Fixing half the loan gives 0.98 times. Whether $67,000 a year is worth that protection depends on how likely you think the bad case is, which is a judgment only you can make.

Private credit borrowers learned this between 2022 and 2026. Valuation Research Corporation's Q2 2026 private markets report found that companies financed in 2021 had leverage about 0.9 times higher and cash interest coverage about 0.4 times lower by the first quarter of 2026 than when their loans were made.

Covenant headroom

Most bank and private loans include financial covenants tested each quarter. The common ones:

• Maximum total leverage: debt divided by trailing twelve-month EBITDA.
• Minimum fixed charge coverage: cash flow after capital spending and taxes divided by principal plus interest.
• Minimum liquidity or net worth, and limits on capital spending or distributions.

Headroom is how far results can fall before a test fails. For the $10 million loan:

A 20% cushion sounds generous until a large customer leaves or a price war starts. When you negotiate, ask for covenants set against a downside version of your plan rather than the base case, an equity cure right (the owners can inject cash to fix a breach a limited number of times), and definitions of EBITDA that include the add-backs you actually expect to use. A covenant breach does not usually mean the loan is called immediately, but it gives the lender the right to charge a waiver fee, raise the rate, or tighten terms at a moment when you have little bargaining power.

Match the maturity to the asset

The repayment term should roughly match the life of what the loan pays for. Financing seven-year equipment with a one-year merchant cash advance forces the equipment to pay for itself in months. Financing seasonal inventory with a ten-year loan leaves interest running long after the goods are sold.

• Inventory and receivables: a revolving line, repaid as the goods sell and customers pay. Our working capital guide covers the cash conversion cycle behind that.
• Equipment: a term loan or lease over its useful life.
• Real estate: long amortization, ideally with a fixed rate, such as an SBA 504 loan.
• An acquisition: a term loan sized to the target's historical cash flow, not its projections. Our M&A strategy guide covers what to pay before deciding how to fund it.

Refinancing risk

A loan with a balloon payment has to be refinanced or repaid at maturity, on whatever terms are available then. In the illustration, $5 million is due at the end of year five. If the business refinances it over five more years at today's 6.90%, payments are about $1.19 million a year; at 9.90%, about $1.27 million. The rate is the smaller risk. The bigger one is that refinancing is harder in a recession, when the business's results are weak and lenders are cautious at the same time.

Practical defenses:

• Start refinancing 12 to 18 months before maturity, while the business still has time to shop and a lender is not forced to decide under deadline.
• Stagger maturities so that not all debt comes due in the same year.
• Prefer amortizing loans when coverage allows, so the balance at maturity is small.
• Keep the lender informed. Borrowers who share monthly results and raise problems early get more flexibility than those who surprise a lender at the covenant test.

When existing debt is already a strain

If coverage is already near 1.0, the choices are to cut spending, raise equity, sell assets, or renegotiate. Consolidating several expensive obligations, such as merchant cash advances and card balances, into one amortizing loan can lower payments considerably, as our small business loans guide shows in its cost comparison. Renegotiating with an existing lender, through an interest-only period, an extended maturity, or a covenant reset, works best before a payment is missed. Our cash flow management guide covers the 13-week forecast lenders will ask for in that conversation.

Checklist before signing

1. Calculate debt capacity by leverage multiple, by coverage at the proposed term, and in a stress case, and borrow below the lowest.
2. Run the rate-shock table with at least +2 and +3 points and EBITDA declines of 15% and 25%.
3. Decide how much to fix or hedge based on that table, and price the prepayment or swap breakage cost.
4. Compute covenant headroom and negotiate covenants against your downside plan, with an equity cure.
5. Match the term to the asset and note every balloon and maturity date.
6. Plan the refinancing timeline for any balloon at least a year ahead.
7. Read the personal guarantee and collateral terms; our business credit guide covers how lenders view owners' credit.

This guide is for informational purposes only and does not constitute financial, legal, or tax advice. Interest rates are as of late September 2026 and change daily; the illustrations use assumed figures and are not forecasts or loan quotes. Consult a qualified accountant, banker, or financial adviser before borrowing.