What Is the Prime Rate?
- 6 min. Read
- Last Updated: 11/04/2026
Table of Contents
A prime rate is the interest rate a bank uses as the starting point for pricing variable-rate loans. In the U.S., the prime rate refers to the benchmark the largest banks generally follow, with lenders adding a margin based on each borrower’s credit and risk.
How Is the Prime Rate Set?
Every bank sets its own prime lending rate, so there are technically many prime rates. In practice, the largest banks match each other, which is why one figure serves as the benchmark. The Federal Reserve’s H.15 release reports the rate posted by a majority of the 25 largest U.S. banks.
Most banks determine their prime rate by adding 3% to the top of the federal funds target range set by the Federal Open Market Committee. The Fed does not set the prime rate itself, but banks usually announce a matching change right after a Fed rate decision, effective the next business day.
Example: A target range peaking at 3.00%, would put the prime rate at 6.00% (3.00% + 3.00%).
How the Prime Rate Affects Borrowing Costs
Lenders rarely charge the prime rate itself. They price variable-rate loans at prime plus a margin that reflects the borrower’s credit, collateral, and overall risk. The margin usually stays the same for the life of the loan, so when the prime rate moves, the loan’s rate moves with it.
Example: A business line of credit is priced at prime plus 2%.
- If prime is 6.00%, the line’s rate is 8.00% (6.00% + 2.00%)
- If prime rises to 6.25%, the rate becomes 8.25%
- On a $100,000 balance, that 0.25% increase adds about $250 a year in interest ($100,000 × 0.25%)
Prime Rate History
The prime rate has swung widely over the decades. It peaked at 21.5% in December 1980 and fell to a low of 3.25% from 2020 to 2022. It then climbed quickly, holding at 8.50% from July 2023 to September 2024. For the full prime rate history, see the St. Louis Fed’s daily prime rate data and its record of each rate change.
The current prime rate is 7.00%, effective September 17, 2026, per the Federal Reserve’s H.15 release.
What Small Businesses Should Know
Small business employers should be fully aware of their options and the variable nature of prime rates.
This means that they should:
- Know which debts are variable. Lines of credit, SBA loans, business credit cards, and some equipment loans often carry variable rates tied to prime.
- Read the loan agreement. Look for the index the rate is based on, the margin, how often the rate adjusts, and any caps or floors that limit how far it can move.
- Understand SBA pricing. SBA 7(a) loans are priced as a base rate, often the prime rate, plus a margin negotiated with the lender. The SBA caps that margin based on loan size and current limits.
- Plan for rate changes. A higher prime rate raises the interest on variable balances, so reviewing those balances after each Fed decision helps keep cash flow forecasts accurate.
How Paychex Can Help
Every move in the prime rate can shift what a business pays to borrow, which makes comparing options before committing worth the effort. Through the Paychex Small Business Loan Center, business owners can review financing options in one place, with guidance from Biz2Credit a third-party lending marketplace.
Prime Rate FAQs
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Is the Prime Rate the Same As the Federal Funds Rate?
Is the Prime Rate the Same As the Federal Funds Rate?
No. The federal funds rate is what banks charge each other for overnight loans, and the Federal Open Market Committee sets a target range for it. The prime rate is what banks use as a starting point for lending to customers. Businesses cannot borrow at the federal funds rate directly.
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How Often Does the Prime Rate Change?
How Often Does the Prime Rate Change?
There is no fixed schedule. The Federal Open Market Committee meets eight times a year, and banks typically adjust prime only when the Fed changes its target range. The rate can go years without moving. Unscheduled Fed moves, like the emergency cuts in March 2020, can also trigger changes.
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Do All Variable-Rate Loans Use the Prime Rate?
Do All Variable-Rate Loans Use the Prime Rate?
No. Prime is one of several benchmarks. Some lenders use the Secured Overnight Financing Rate (SOFR) or Treasury rates instead, and since March 2026, the SBA allows certain alternative base rates on variable-rate 7(a) loans. The loan agreement names the index, which determines how and when the rate moves.
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Does the Prime Rate Affect Fixed-Rate Loans?
Does the Prime Rate Affect Fixed-Rate Loans?
No. A fixed-rate loan already in place keeps its rate for the fixed term, no matter how the prime rate moves. New fixed-rate offers may still reflect current rates, since lenders consider prevailing rates when pricing them. Some loans start fixed and later convert to variable, so the agreement shows whether that applies.
This content is for general information only and is not financial, legal, or tax advice. Rates, terms, and eligibility vary by lender. Consult a qualified professional about a specific business situation.
AI was used to assist in the creation of this content.
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