The prime rate is set by individual commercial banks, not by the Federal Reserve — but in practice, nearly every major U.S. bank follows the same convention of keeping its prime rate exactly 3 percentage points above the upper end of the Fed’s federal funds target range. That convention is why the prime rate looks like a government number even though it isn’t. As of early 2026, the federal funds target range sits at 3.50% to 3.75%, which puts the prime rate at 6.75%.1Federal Reserve Board. H.15 – Selected Interest Rates (Daily)
What the Federal Reserve Actually Controls
The Federal Open Market Committee, the Fed’s policy-setting body, meets eight times a year to decide on a target range for the federal funds rate.2Federal Reserve Board. FOMC Meeting Calendars and Information That rate is what banks charge each other for overnight loans of reserve balances. By moving the target up or down, the committee changes borrowing costs across the economy without directly dictating what any bank charges its customers.
Raising the target makes borrowing more expensive and tends to cool spending. Lowering it does the opposite. In January 2026, the committee held the target range at 3.50% to 3.75%.3Federal Reserve Board. The Fed Explained – Accessible Version The committee can also call unscheduled meetings in emergencies.
So the Fed’s role is upstream. It sets the price banks pay to borrow from each other overnight. What a bank then charges you is a separate decision.
How Banks Set Their Prime Rate
Each bank is a private institution, and no law requires it to charge a specific prime rate. A bank could, in theory, pick any number it wanted based on its cost of funds, competitive pressure, and liquidity. In practice, the largest U.S. banks have followed the same formula since the early 1990s: the prime rate equals the upper end of the federal funds target range plus 3 percentage points. With the current upper target at 3.75%, that produces today’s 6.75% prime rate.1Federal Reserve Board. H.15 – Selected Interest Rates (Daily)
The 3-point spread has held so consistently that many people assume the Fed sets the prime rate directly. It doesn’t. The Fed controls the raw material, and individual banks apply the standard markup on top. Because the convention is near-universal, when the FOMC changes the target, every major bank adjusts its prime rate by the same amount, usually within a day or two. The result looks like a single national rate even though it is really dozens of banks moving in lockstep.
Banks do use other benchmarks for some products. Certain adjustable-rate mortgages are tied to a Cost of Funds Index rather than the prime rate. But for credit cards, home equity lines of credit, and most short-term business loans, prime is the dominant index.
The Published Prime Rate
If each bank technically sets its own number, how does a loan contract point to “the” prime rate? Through a published benchmark. The Wall Street Journal publishes a widely used prime rate figure based on the base rate posted by the largest U.S. banks, and the published number changes when enough of those banks move in the same direction.4The Wall Street Journal. Money Rates The Federal Reserve separately publishes a “bank prime loan” rate on its H.15 release, defined as the rate posted by a majority of the 25 largest U.S.-chartered commercial banks by domestic assets.1Federal Reserve Board. H.15 – Selected Interest Rates (Daily)
Loan contracts routinely reference “the Prime Rate as published in The Wall Street Journal” as the index for variable interest rates. A single, independently published number keeps lenders and borrowers from arguing over what the rate is on a given day. It also means no single bank can shift the national benchmark on its own — the published rate moves only when a critical mass of major banks agree.
How the Prime Rate Reaches Your Loan
Most consumers never actually borrow at the prime rate. Lenders use it as a starting point and add a margin based on your creditworthiness. Prime plus margin is your actual rate. The structure shows up across several common products:
- Credit cards. Most variable-rate cards are priced as prime plus a fixed margin. The average margin across all credit tiers reached 16.4% in 2024, which with today’s 6.75% prime rate puts a typical cardholder above 23% APR. Stronger credit profiles get smaller margins; weaker ones get larger.5Consumer Financial Protection Bureau. The Consumer Credit Card Market Report to Congress
- Home equity lines of credit. Nearly all HELOCs are indexed to the prime rate, and the rate adjusts within one to two billing cycles after prime moves.
- Auto loans and personal loans. Many variable-rate products from banks and credit unions are also indexed to prime.
Credit scores drive the margin. Borrowers at the top of the range receive the smallest margins above prime; those with fair or poor credit can see margins many times larger.6MyCreditUnion.gov. Credit Scores The prime rate itself, with no margin added, is generally reserved for large corporations with the strongest financial profiles, not individual consumers.
SBA Loans
Small Business Administration 7(a) loans, when variable-rate, are typically indexed to the prime rate. Federal regulations require the base rate on a variable-rate 7(a) loan to be the prime rate as printed in a national financial newspaper, and rate adjustments can occur no more often than monthly.7eCFR. 13 CFR 120.214 – What Conditions Apply for Variable Interest Rates The first adjustment may happen on the first day of the month after disbursement.
The SBA caps the spread a lender can charge above prime, with the cap depending on loan size. Loans of $50,000 or less can carry up to prime plus 6.5%, while loans above $350,000 are capped at prime plus 3%.8U.S. Small Business Administration. Types of 7(a) Loans At today’s 6.75% prime rate, a borrower with a large SBA loan could pay no more than 9.75%, while a borrower with a very small one could pay up to 13.25%.
When Your Rate Changes
Variable-rate credit card holders usually expect advance notice before a rate increase. Federal law generally requires 45 days’ written notice, but there is an important exception: when your rate rises solely because the prime rate increased under your existing agreement, no advance notice is required.9eCFR. 12 CFR 1026.9 – Subsequent Disclosure Requirements You already agreed to a rate tied to a public index, so the change is treated as automatic rather than discretionary.
For credit cards, the higher rate usually shows up on the next billing statement after prime moves. For HELOCs, the adjustment typically takes effect within one to two cycles. The new prime rate appears in any major financial publication the day it changes, so there is no hidden or proprietary figure.
Lenders still have to tell you upfront how the variable rate works. Credit card issuers must disclose that the rate may vary and identify the index, such as the prime rate. Home equity lenders must explain the circumstances under which the rate can rise and any caps that apply. For adjustable-rate mortgages, the lender must provide a handbook on adjustable rates and a program disclosure explaining how future adjustments will be calculated.
When the FOMC leaves the target alone, as it did in January 2026, the prime rate stays put and variable-rate borrowers see no change in their index.10Federal Reserve Board. FOMC Minutes January 2026 On a $50,000 HELOC balance, a quarter-point increase adds roughly $125 per year in interest. On a $10,000 credit card balance carried month to month, the same move adds about $25 annually. Those amounts compound quickly when the committee makes several consecutive moves in the same direction, which is why watching the Fed, even though it isn’t the entity signing your loan, is still the best way to see where your prime-indexed rate is headed next.