TurboFunding.com
Walk into any conversation about a business loan and one of the first questions a lender will ask is whether you want fixed or variable. Most owners answer on instinct, usually picking whichever sounds safer that day, and end up with a structure that does not match how their business actually makes money. The right answer is not universal. It depends on your margins, your industry, the rate environment, and how much variance your cash flow can swallow before it hits a covenant or a payroll cycle.
This guide walks through how each rate type is actually priced, what you give up in exchange for predictability, and how to match the structure to the business. We will show you the math on a realistic $500K loan and explain why the same rate decision can be obviously right for one borrower and obviously wrong for the one next door.
How variable rate business loans actually work
Variable rate loans are almost always quoted as an index plus a spread. The index is usually the Wall Street Journal Prime Rate, sometimes SOFR or a Treasury yield, and the spread is the lender's margin based on your credit profile and the product type. If Prime is 8.50% and your spread is 2.00%, your effective rate is 10.50%. When the Fed moves the federal funds rate, Prime moves in lockstep within a day or two, and your loan rate adjusts on its next repricing date.
The repricing cadence matters more than most borrowers realize. A bank business line of credit typically reprices monthly, which means a 25 basis point Fed cut shows up in your payment within 30 days. An SBA 7(a) variable rate loan reprices quarterly, so the same cut takes up to three months to flow through. Asset-based lending facilities and merchant cash advances also carry variable-like exposure, although MCAs price the variance into a fixed factor rate at origination rather than letting it float.
Conventional commercial mortgages often use a hybrid structure. The rate is fixed for the first 5 or 7 years and then floats over Prime or SOFR for the remaining term, which is one reason refinance volume spikes every time a cohort of these loans hits its reset date. Our deep dive on how business loan rates are built walks through the spread components in more detail, and our piece on 2026 rate cuts and their impact on business loans covers what to expect from the current cycle.
The advantage of variable is simple. You start at a lower rate than the equivalent fixed product, and if rates fall, you capture the benefit automatically with no refinance cost. The risk is just as simple. If rates rise, your payment rises with them, and that variance has to come out of margin somewhere.
How fixed rate business loans work, and what you give up
Fixed rate loans lock the rate at origination for the full term. Your payment is identical in month one and month sixty, regardless of what the Fed does in between. That predictability is the entire product. You can model your cash flow with certainty, you can lock in expansion plans without worrying about a future rate shock, and you do not need to build covenant headroom for rate variance.
The cost of that certainty is typically 50 to 200 basis points over an equivalent variable rate at origination. The lender is effectively selling you insurance against rate increases, and they price it based on their own forward rate expectations plus a buffer. In a steeply normal yield curve environment, the fixed premium widens. In a flat or inverted curve, it narrows or sometimes flips, with fixed actually pricing below variable for short tenors. That dynamic is worth checking on the day you sign, not assuming based on what was true last quarter.
Equipment financing is almost always fixed because the underlying asset depreciates on a predictable schedule. The lender wants their payment curve to match the asset's value curve, and a fixed structure does that cleanly. Most bank term loans are also fixed for the first 3 to 5 years, often with a balloon payment or a refinance clause at the end. The gold standard for fixed pricing in small business is the SBA 504 CDC debenture portion, which is fully fixed for 25 years and consistently prices below conventional commercial real estate debt. There is no better long-term fixed rate available to a small business owner buying their building.
What you give up with fixed is upside. If rates drop materially after you close, you are stuck at the original rate unless you refinance, and refinancing costs $3,000 to $7,000 in fees plus the time and document drag. The rule of thumb most CFOs use is that a refi makes sense when the rate drops 100 basis points or more with at least 18 months remaining on the loan. Below that threshold, the fees eat the savings.
Matching the rate type to your business and cash flow
Here is where most borrowers get it wrong. The choice between fixed and variable is not about predicting where rates are going. It is about how much rate variance your business can absorb before it hits a problem.
Run this math on your own P&L. Take your current loan balance, multiply it by 150 basis points (a realistic one-year rate move in either direction), and ask whether your business can absorb that swing without hitting a debt service coverage covenant or eating into owner draws. On a $500K balance, 150 basis points is $7,500 a year, or roughly $625 a month. If your business runs at a 20% net margin on $2M of revenue, that is $400K of net income and the variance is a rounding error. If you run at a 5% net margin on the same revenue, that is $100K of net income and the swing eats 7.5% of your bottom line in a single year.
The cash flow profile matters as much as the margin. A business with predictable, recurring revenue (think SaaS, memberships, long-term contracts) can carry variable rate debt comfortably because the deposit side of the bank statement does not surprise underwriters. A seasonal business or one with concentrated customer revenue should lean fixed, because a rate increase on top of a slow quarter compounds into a real liquidity problem. Our guide on how lenders read bank statements covers exactly what cash flow patterns get flagged.
Here is a concrete example. Take a $500K loan at 9.5% variable versus 10.5% fixed on a 5-year term. Year one, the variable borrower saves roughly $5,000 in interest. If Prime jumps 200 basis points at the start of year two and holds through year five, the variable rate climbs to 11.5% and the borrower now pays approximately $5,000 more per year through the back end of the loan. Probability weighted across a normal rate cycle, the expected value of fixed in volatile rate environments is often positive, especially for borrowers who cannot easily refinance into a better structure.
For shorter horizons and revolving capital needs, variable usually wins. A line of credit you draw and repay within 60 days is barely exposed to rate movement, and the lower starting rate is real money. For multi-year asset purchases, build-outs, or real estate, fixed almost always wins on a risk-adjusted basis. If you are unsure whether you need revolving or term capital in the first place, see our breakdown of working capital versus line of credit.
How TurboFunding Helps
TurboFunding works with both fixed and variable structures across the full product stack, and we help you pick the right one based on your actual cash flow rather than whatever the lender pitches first. We fund term loans, SBA 7(a), SBA 504, equipment financing, lines of credit, bridge loans, MCAs, and working capital from $10K to $5M. We accept 550+ FICO, $10K+ in monthly revenue, and 6+ months in business on most revenue-based products. The application takes 3 minutes, uses a soft credit pull, and gives you real options with real rate structures so you can compare apples to apples. Find out More.
Frequently Asked Questions
Q. Is variable always cheaper than fixed at origination?
A. Usually, but not always. In a flat or inverted yield curve environment, short-term fixed rates can price below variable for 3 to 5 year terms. Check the actual quoted rate on the day you sign rather than assuming variable wins by default.
Q. Can I switch from variable to fixed later?
A. Yes, by refinancing. Most variable rate business loans do not have an internal conversion option, so switching means a new loan with new closing costs. Plan for $3,000 to $7,000 in fees and budget the time accordingly.
Q. How often do SBA 7(a) variable loans reprice?
A. Quarterly, on the first business day of the calendar quarter. Some lenders also offer SBA 7(a) with monthly repricing, but quarterly is the standard. Our SBA 7(a) qualification guide covers the full structure.
Q. What is the cheapest fixed rate product for small business?
A. The CDC debenture portion of an SBA 504 loan, used to buy owner-occupied real estate, is fully fixed for 25 years and consistently prices well below conventional commercial mortgage debt. See our guide to the cheapest business loans for the full ranking.
Q. Should I lock fixed if I expect rates to fall?
A. Maybe, depending on how much they fall and how long you keep the loan. If your loan is at least 18 months from payoff and rates drop 100 basis points or more, refinancing into a lower fixed or variable rate usually pencils after closing costs. Below that threshold, the fees eat the savings and locking fixed today still made sense.
The fixed versus variable question is not a coin flip, and it is not a bet on the Fed. It is a structural decision about how much variance your business can carry without breaking. Match the rate type to the cash flow, not to the headline, and the loan will work for you instead of against you. If you want to compare both structures on the same deal and see real numbers, we can run them side by side in the same application. Apply in 3 minutes with a soft credit pull and no impact to your score. Find out More.