The prime rate is the interest rate that banks charge their most creditworthy customers, and it changes based on decisions made by the Federal Reserve

The prime lending rate (also called the prime rate or the base rate) is the lowest interest rate that banks will offer on loans. Banks use it as a starting point: if you get a loan, your actual rate will be the prime rate plus an additional percentage that depends on your credit score, income, and the type of loan.

The prime rate itself is not set by any single bank or government agency. Instead, it follows the federal funds rate, which is the interest rate that the Federal Reserve sets for banks to lend money to each other overnight. When the Federal Reserve raises or lowers the federal funds rate, banks typically raise or lower the prime rate within a day or two.

You do not borrow at the prime rate unless you have excellent credit and a strong financial history. Most people pay prime plus 2 to 10 percentage points, depending on the loan type and their creditworthiness.

Key Takeaways

  • The prime rate is the baseline interest rate banks use to calculate what they charge you on a loan.
  • The Federal Reserve does not set the prime rate directly, but changes to the federal funds rate cause banks to adjust their prime rates within days.
  • Your actual loan rate will be higher than the prime rate, with the difference depending on your credit score and the type of loan.
  • Prime rate changes affect credit cards, home equity lines of credit, and adjustable-rate mortgages more quickly than fixed-rate loans.
  • You can find the current prime rate published daily in major financial newspapers and on bank websites.

How the Federal Reserve controls the prime rate indirectly

The Federal Reserve does not announce a "prime rate" the way it announces the federal funds rate. Instead, the Fed sets a target range for the federal funds rate—the rate at which banks lend reserve balances to each other overnight. This is the tool the Fed uses to influence the broader economy.

When the Federal Reserve raises the federal funds rate, banks face higher costs to borrow from each other, so they raise the prime rate to offset that cost. When the Fed lowers the federal funds rate, banks lower the prime rate. The prime rate typically moves in lockstep with the federal funds rate, usually within one business day of a Fed announcement.

The Fed raises rates when it wants to slow inflation and reduce spending. It lowers rates when it wants to encourage borrowing and spending to boost economic activity. These decisions happen roughly every six weeks at a Federal Reserve meeting, though the Fed can act between meetings if conditions warrant it.

Why banks add extra percentage points to the prime rate

The prime rate is the floor, not the price you pay. Banks add a margin on top of the prime rate to account for the risk that you might not repay the loan. A borrower with a 750 credit score and steady income poses less risk than a borrower with a 600 credit score and variable income, so the bank charges the second borrower a higher margin.

The margin also depends on the type of loan. A home equity line of credit (HELOC) typically has a smaller margin than a personal loan, because the home serves as collateral—the bank can sell it if you do not pay. A credit card usually has a larger margin because there is no collateral at all.

Your actual rate = Prime Rate + Bank's Margin. If the prime rate is 8.5% and your margin is 4%, you pay 12.5%. When the prime rate moves, your rate moves by the same amount (unless you have a fixed-rate loan, which does not change).

Which loans are affected most quickly by prime rate changes

Loans with rates tied directly to the prime rate change immediately when the prime rate changes. These include most credit cards, home equity lines of credit (HELOCs), and adjustable-rate mortgages (ARMs). If you carry a credit card balance, a prime rate increase means your interest charges go up the next billing cycle.

Fixed-rate loans—like a traditional 30-year mortgage or a personal loan with a locked rate—do not change when the prime rate changes. Your rate was set the day you signed the loan documents and stays the same for the life of the loan. However, when you refinance or take out a new loan, the rate you are offered will reflect the current prime rate plus margin.

Savings accounts and money market accounts sometimes pay interest rates tied to the prime rate, though the connection is looser. Banks may raise savings rates when the prime rate rises, but they often lag behind and do not rise by the full amount.

Where to find the current prime rate

The prime rate is published daily in the Wall Street Journal, which is the source most banks use as their official reference. You can also find it on the Federal Reserve's website, on major financial news sites like CNBC or Bloomberg, and on most bank websites.

The current prime rate is typically listed as a single number—for example, 8.5%—because nearly all banks use the same rate. If you see different banks advertising different prime rates, one of them is using an outdated number or a different reference point.

If you want to track how the prime rate has moved over time, the Federal Reserve publishes historical federal funds rates going back decades. Since the prime rate follows the federal funds rate, you can use the Fed's data to see how your loan rate may have changed.

How prime rate changes affect your monthly payments

On a fixed-rate loan, prime rate changes do not affect your payment at all. You locked in your rate when you borrowed, and it does not move.

On an adjustable-rate loan or a credit card, a prime rate increase means your interest rate goes up, which increases what you owe each month. On a credit card, the effect is immediate—your next statement will show a higher interest charge. On an ARM mortgage, the rate usually adjusts once or twice a year on a set date, so you might not see the change for several months.

On a HELOC, the rate adjusts continuously as the prime rate moves. If you are drawing money from the line, your payment can change from month to month. If you are not drawing money, you still owe interest on the balance at the current rate.

Why the prime rate matters even if you have a fixed-rate loan

If you have a fixed-rate loan, the prime rate does not change what you owe. But it matters for your future borrowing. When you refinance a mortgage, take out a new car loan, or open a new credit card, the rate you are offered will be based on the current prime rate plus your margin.

If the prime rate has risen since you took out your current loan, refinancing will be more expensive. If the prime rate has fallen, refinancing might save you money. Watching the prime rate helps you time major financial decisions.

The prime rate also signals the direction of the economy. A rising prime rate usually means the Federal Reserve is trying to cool down inflation, which often leads to slower economic growth. A falling prime rate usually means the Fed is trying to stimulate the economy, which often happens during or after a recession.

Frequently Asked Questions

Does the prime rate change every day?

No. The prime rate changes only when the Federal Reserve changes the federal funds rate, which happens roughly every six weeks at a scheduled meeting. Between meetings, the prime rate stays the same. The Fed can call an emergency meeting to change rates if conditions warrant it, but this is rare.

Can I negotiate a better rate than prime plus my margin?

For most consumer loans, no. Banks use the prime rate plus a margin as their standard pricing model, and the margin is based on your credit score and loan type. However, if you have excellent credit and a long relationship with a bank, you may be able to negotiate a slightly lower margin on some products like a HELOC or personal loan. Credit card rates are almost never negotiable.

What happens to my ARM mortgage when the prime rate rises?

Your interest rate will increase on the adjustment date specified in your loan documents, usually once or twice a year. Your monthly payment will go up. Most ARMs have a cap on how much the rate can increase per adjustment period and over the life of the loan, so your rate cannot rise indefinitely, but it can still increase significantly over time.

If I pay off my credit card balance, do I still care about the prime rate?

Only if you carry a balance in the future. If you pay your full statement balance every month, you pay no interest regardless of the prime rate. However, if you ever carry a balance, the interest rate you pay will be based on the prime rate at that time plus your card's margin.

Is the prime rate the same in every country?

No. Each country has its own central bank that sets its own base rate. The United States has the Federal Reserve and the federal funds rate. The United Kingdom has the Bank of England and the Bank Rate. Canada has the Bank of Canada and the overnight rate. Each country's prime rate follows its own central bank's decisions.