SBA caps the interest rate on a 7(a) loan as a base rate, usually the Prime rate, plus a maximum spread that depends on the loan's size. For variable-rate loans the cap is the base rate plus 6.5% for loans of $50,000 or less, plus 6% from $50,001 to $250,000, plus 4.5% from $250,001 to $350,000, and plus 3% above $350,000. Fixed-rate loans have their own, higher caps. Lenders may charge less, and many do. The cap limits the rate, not the guaranty fee or other costs.
- Who sets the cap
- SBA, in its lending rules (SOP 50 10)
- Base rate
- Usually the Prime rate; SBA allows a short list of alternatives
- Loans above $350,000
- Variable rate capped at the base rate plus 3%
- Fixed rates
- Allowed, with their own, higher maximum spreads
- What the cap does not cover
- SBA's guaranty fee, closing costs, and the prepayment fee on long loans
- What lenders actually charge
- Anywhere up to the cap; pricing varies widely by lender
The caps, by loan size
SBA's rules set a ceiling on the spread a lender may add to the base rate. The ceiling falls as the loan gets larger, on the reasoning that small loans cost nearly as much to make and service as large ones, so lenders need more margin to make them at all. For a variable-rate 7(a) loan, the caps are:
| Loan amount | Maximum variable rate | Who is usually in this band |
|---|---|---|
| $50,000 or less | Base rate plus 6.5% | Very small working capital and equipment loans |
| $50,001 to $250,000 | Base rate plus 6% | Small working capital loans, many SBA Express loans |
| $250,001 to $350,000 | Base rate plus 4.5% | Smaller acquisitions and refinancings |
| Above $350,000 | Base rate plus 3% | Larger acquisitions, real estate and refinancings, up to the $5 million 7(a) limit |
The cap is a spread, not a fixed number. When Prime rises, the maximum rate rises with it; when Prime falls, so does the ceiling. A borrower on a variable-rate loan above $350,000 can be charged no more than Prime plus 3% at any reset, whatever Prime is at the time.
On any variable-rate 7(a) loan above $350,000, the rate can never exceed the base rate plus 3%, however strong or weak the file.
Base rates, fixed rates and how often the rate moves
Most 7(a) quotes are written as Prime plus a spread, using the Prime rate as published. SBA's rules also let lenders peg to a short list of alternative base rates, but whichever base the note uses, the same spread caps apply. The note states the base, the spread, and how often the rate adjusts.
SBA also permits fixed-rate 7(a) loans. Their caps also step down as the loan grows, but allow larger maximum spreads than variable loans, because the lender carries the risk that rates rise over the life of the loan. In practice, fixed-rate 7(a) loans are less common than variable ones, and some lenders offer a rate fixed for an initial period that then converts to variable. A borrower weighing the two should read fixed versus variable, keeping in mind that on a long SBA loan the choice runs for a decade or more.
Where the base is Prime, SBA pricing moves with the same Federal Reserve decisions as SOFR-based loans, but Prime sits higher than SOFR, so an SBA spread looks small next to a private credit spread for reasons that have nothing to do with price. The SOFR versus Prime comparison explains the gap.
The cap is a ceiling; lenders price below it
Many SBA lenders price at or near the maximum, and many price below it. What a given borrower is offered depends on the lender's appetite, the size of the loan, the collateral, the strength of cash flow and the file itself. Transparent's SBA loan rates page shows how widely lenders' actual pricing ranges across SBA's own loan data, for the same program under the same caps.
The spread is not the only term that varies. Lenders differ on whether they will finance goodwill-heavy acquisitions, how they treat a seller note, what collateral they take, and how they read add-backs. A lender below the cap that will not do the deal is worth less than one at the cap that will. Transparent's lender book includes 278 lenders that write SBA 7(a) and 504, which is what makes a comparison possible rather than a single take-it-or-leave-it quote.
What the rate cap does not cover
The interest rate is the largest cost of an SBA loan, but not the only one. The ones borrowers most often miss:
- SBA's guaranty fee, charged on the guaranteed portion of the loan and usually financed into it. It is set by SBA, not the lender, and sits outside the rate cap.
- Closing costs: appraisals, the independent business valuation SBA requires when the amount financed, less appraised real estate and equipment, exceeds $250,000 or buyer and seller are related, environmental reports on real estate, legal and title costs.
- The prepayment fee. On 7(a) loans of 15 years or more, prepaying more than 25% in any of the first three years costs 5% of the prepaid amount in year one, 3% in year two and 1% in year three. See SBA prepayment penalty.
- Agent fees, which SBA requires to be disclosed on Form 159. Transparent charges nothing before a loan closes, and on SBA loans the lender pays Transparent, not the borrower.
Comparing an SBA quote with conventional and private credit offers
A buyer with an SBA quote in one hand and a bank or private credit term sheet in the other is rarely comparing like with like. The rate is one line. The terms around it change what the business can afford and what the owner is on the hook for.
| Term | SBA 7(a) | Conventional bank | Private credit |
|---|---|---|---|
| Rate | Prime plus a spread, capped by SBA | Prime or SOFR plus a spread, not capped | SOFR plus a wider spread, often with a floor and upfront discount |
| Loan size | Up to $5 million | Set by the bank's appetite and collateral | Sized on EBITDA, commonly 2x to 3.5x for senior cash-flow lenders |
| Amortization | Up to 10 years for goodwill and working capital, 25 years for real estate | Often shorter for goodwill | Light amortization, larger payment at maturity |
| Equity from the buyer | At least 10% of project costs on a change of ownership | Usually more | Usually more, from a sponsor or the buyer |
| Personal guarantee | Every owner of 20% or more | Common | Often not required |
| Coverage | At least 1.15x; 1.25x on historical results for a change of ownership from 1 October 2026 | Commonly at least 1.25x | Leverage and coverage covenants |
| Early payoff | Fee on loans of 15 years or more in the first three years | Varies | Call protection is common |
The longer SBA amortization often matters more than the rate. Spreading goodwill over 10 years instead of a shorter bank schedule lowers the annual payment, which lifts debt service coverage and can be the difference between a deal that works and one that doesn't. Against that, SBA requires personal guarantees, full-standby treatment for any seller note counted as equity, and a financing ceiling of $5 million.
The fair comparison is annual debt service and total cost over the years you expect to hold the loan, with the fees included and the guarantees and restrictions weighed alongside. The SBA versus conventional acquisition loan page walks through that side by side, and interest rate versus all-in cost shows how to put fees on the same footing as the rate.
Common questions
- Can an SBA lender charge more than Prime plus 3%?
- On a variable-rate 7(a) loan above $350,000, no. Smaller loans have higher caps: up to the base rate plus 4.5% from $250,001 to $350,000, plus 6% from $50,001 to $250,000, and plus 6.5% at $50,000 or less. Fixed-rate loans have their own higher caps.
- Is the SBA rate fixed or variable?
- Either. Most 7(a) loans are variable, tied to Prime and adjusting on the schedule in the note. Fixed-rate loans are permitted with higher maximum spreads. Some lenders fix the rate for an initial period and then let it float.
- Does the rate cap include the SBA guaranty fee?
- No. The guaranty fee is a separate charge set by SBA on the guaranteed portion of the loan, and it is usually financed into the loan. Closing costs, appraisals and valuations are also outside the cap.
- Why do SBA lenders offer different rates if SBA sets the cap?
- The cap is a maximum, not a price. Each lender chooses where to price below it based on its funding costs, its appetite for the loan type and the strength of the file. SBA's own loan data shows a wide range of pricing across lenders.
- Do SBA rate caps apply to SBA 504 loans?
- No. The caps described here are for 7(a) loans. In a 504, the bank's first-lien loan is priced by the bank, and the CDC's portion carries a fixed rate set when SBA sells the debentures that fund it.