The bank prime rate is the interest rate that banks charge their most creditworthy customers for loans, and it moves based on decisions made by the Federal Reserve.

The prime rate is not set by any single authority — instead, it follows the federal funds rate, which is the interest rate that banks charge each other for overnight loans. When the Federal Reserve raises or lowers the federal funds rate, banks typically raise or lower the prime rate by the same amount within a day or two. Most banks use the Wall Street Journal's published prime rate as their benchmark, though some may use their own internal calculations.

The prime rate matters to you because it is the starting point for almost every other interest rate you encounter. When a bank advertises a rate for a credit card, home equity line of credit, or adjustable-rate mortgage, that rate is usually the prime rate plus a markup called a spread. If the prime rate rises, those rates rise too — sometimes immediately, sometimes at the next billing cycle or rate adjustment date.

Key Takeaways

  • The prime rate is the baseline interest rate banks use for their best customers and moves when the Federal Reserve changes the federal funds rate.
  • Your savings account, money market account, or certificate of deposit may earn interest tied to the prime rate, so higher prime rates can mean higher yields on your deposits.
  • Credit cards, home equity lines of credit, and adjustable-rate loans charge the prime rate plus a spread, so your borrowing costs rise when the prime rate rises.
  • The prime rate is published daily in the Wall Street Journal and changes only when the Federal Reserve acts, not continuously throughout the day.

How the prime rate affects savings and deposit accounts

Banks use the prime rate as a reference when setting the interest rates they pay on savings accounts, money market accounts, and certificates of deposit. When the prime rate is high, banks have more room to offer higher yields to attract deposits. When the prime rate is low, banks offer lower yields because they are earning less on their own loans.

The relationship is not one-to-one — a bank does not automatically raise your savings rate by the full amount the prime rate rises. Banks adjust deposit rates at their own pace, and some move faster than others. Online banks and credit unions often respond more quickly to prime rate changes than large traditional banks, because they compete more directly on interest rates.

If you hold a certificate of deposit with a fixed rate, the prime rate does not affect your rate during the term — your rate is locked in when you open the account. But when your CD matures and you renew it, the new rate will reflect the current prime rate environment.

How the prime rate affects borrowing costs

Credit cards, home equity lines of credit, and adjustable-rate mortgages all use the prime rate as their foundation. A bank might advertise a credit card with an APR of "prime plus 12%," which means if the prime rate is 8%, your APR is 20%. When the prime rate rises to 8.5%, your APR automatically rises to 20.5%.

Fixed-rate loans — like a standard 30-year mortgage or a personal loan with a locked rate — are not affected by changes in the prime rate after you sign. The rate you locked in at closing stays the same for the life of the loan. But when you shop for a new loan, the rate you are offered will reflect the current prime rate plus the lender's spread.

Adjustable-rate mortgages (ARMs) and home equity lines of credit (HELOCs) often have an initial fixed period — sometimes 3, 5, 7, or 10 years — followed by a period where the rate adjusts periodically based on the prime rate. When the adjustment period begins, your rate can change significantly if the prime rate has moved.

When and why the prime rate changes

The Federal Reserve meets eight times per year to review economic conditions and decide whether to raise, lower, or hold the federal funds rate steady. The prime rate follows these decisions almost immediately. If the Fed raises the federal funds rate by 0.25%, the prime rate rises by 0.25% the next business day.

The Fed raises rates when inflation is too high and the economy is growing too fast. It lowers rates when the economy is weak or unemployment is rising. These decisions affect the entire financial system — not just the prime rate, but also mortgage rates, auto loan rates, and the yields on savings accounts.

The prime rate can remain unchanged for months or even years if the Fed holds the federal funds rate steady. It can also move multiple times in a single year if economic conditions shift rapidly. There is no set schedule for when the prime rate will change — it changes only when the Federal Reserve acts.

How to track the current prime rate

The Wall Street Journal publishes the prime rate daily in its Money and Investing section and online. The rate appears as a single number — for example, 8.50% — and represents the consensus of major banks about where the prime rate stands. You can also find the current prime rate on financial websites like CNBC, Investopedia, or your own bank's website.

Your bank is required to disclose the index and margin (spread) used to calculate any adjustable rate you hold. If you have a HELOC or adjustable-rate mortgage, your loan documents will state something like "prime rate plus 1.5%." You can use the published prime rate to calculate what your rate should be at any time.

If you are shopping for a loan or opening a savings account, ask the lender or bank what index they use and what margin they apply. Some use the prime rate; others use the SOFR (Secured Overnight Financing Rate) or other benchmarks. The spread or margin is what the bank keeps as profit, so comparing spreads across lenders can help you find the best deal.

The difference between the prime rate and other interest rates

The prime rate is one of several benchmark rates used in finance. The federal funds rate is the rate the Fed targets, and the prime rate follows it. The SOFR is a newer benchmark based on actual overnight lending transactions rather than bank estimates, and some lenders are moving toward it for new loans.

Treasury rates — the yields on U.S. government bonds — are separate from the prime rate and move based on demand for government debt and inflation expectations. Mortgage rates are influenced by Treasury rates and the prime rate but are not directly tied to either one. Credit card rates and personal loan rates are most directly tied to the prime rate.

Understanding which rate applies to your account or loan matters because it tells you what will happen when interest rates change. If you have a prime-based adjustable rate, your costs or earnings will move with Federal Reserve decisions. If you have a fixed rate or a rate based on Treasury yields, you are insulated from prime rate changes.

What happens to your accounts when the prime rate rises or falls

When the prime rate rises, banks earn more on their loans, so they can afford to pay more on deposits — but they do not always do so immediately or by the full amount. Savers benefit most when the prime rate is high and banks are competing for deposits. Borrowers benefit most when the prime rate is low.

When the prime rate falls, banks earn less on loans, so they lower the rates they pay on deposits. Borrowers with adjustable rates see their payments fall, but savers see their yields shrink. This is why savers often move money into certificates of deposit when rates are high — locking in a rate before it falls.

If you have both savings and debt, rising prime rates are a mixed outcome: your savings earn more, but your adjustable-rate borrowing costs more. The net effect depends on how much you have in each category and how quickly your bank adjusts your rates.

Frequently Asked Questions

Does the prime rate affect my fixed-rate savings account or CD?

No, once you open a fixed-rate account, the rate you earn is locked in regardless of what happens to the prime rate. When your CD matures, the new rate offered will reflect the current prime rate environment, but your existing rate does not change.

Can I predict when the prime rate will change?

The Federal Reserve publishes its meeting schedule in advance, so you know when decisions will be made. However, the Fed does not announce its decision before the meeting, so you cannot know whether it will raise, lower, or hold rates until the announcement is made. Financial news outlets often discuss the likelihood of a rate change before each meeting.

If my credit card rate is prime plus 12%, will my rate always be 12% above prime?

Yes, the spread stays the same. If prime is 8% and your rate is 20%, and prime rises to 8.5%, your rate becomes 20.5%. The 12% difference between your rate and prime does not change unless your card issuer changes the terms of your account.

Why do some banks raise deposit rates faster than others when the prime rate rises?

Banks set their own rates based on competition and funding needs. Online banks often raise rates quickly because they compete directly on yield. Large banks with many branches may move more slowly because they have other ways to attract deposits. Shopping around when rates rise can help you find banks that pass increases to savers quickly.

Is the prime rate the same at every bank?

The prime rate itself is the same — it is published as a single number. But the rates banks charge or pay are the prime rate plus their own spread or margin. Two banks might both use the prime rate as their index but charge different APRs on credit cards because they add different spreads.