How a Federal Reserve rate decision reaches your loans and savings

By the Business News Analysis desk · Published September 29, 2026

The Fed sets one overnight interest rate. Here is how that decision flows through to credit cards, car loans, savings accounts and mortgages, and why some rates barely move.

Eight times a year, the Federal Open Market Committee (FOMC) meets and announces whether it is raising, lowering or holding its policy interest rate. Coverage of the decision often implies that every rate in the economy moves with it. Some do, almost to the day. Others respond slowly, partially or not at all. The difference comes down to what each loan or account is priced from.

What the Fed actually sets

The FOMC sets a target range for the federal funds rate, the interest rate at which banks lend reserve balances to each other overnight. The range is a quarter of a percentage point wide, for example 4.25% to 4.50%. The Fed keeps the actual market rate inside that range mainly by setting the interest rate it pays banks on reserves held at the Fed and the rate on its overnight reverse repurchase facility.

The federal funds rate itself matters to very few households directly. Its influence comes from being the foundation on which other short-term rates are built.

Rates that move almost immediately

The prime rate. Most large US banks set their prime rate, the base rate for many consumer and small-business loans, at the upper end of the fed funds target range plus three percentage points. Banks typically change prime the day after an FOMC decision.

Credit cards. Most credit card rates are variable and written as prime plus a margin. When prime rises by a quarter point, the card's rate rises by a quarter point, usually from the next billing cycle. The margin itself, which depends on the card and the borrower's credit, is often far larger than any single Fed move.

Home equity lines of credit and many small-business lines also tend to be tied to prime and adjust quickly.

Adjustable-rate loans tied to short-term benchmarks such as the Secured Overnight Financing Rate (SOFR) move as those benchmarks move, but only on the loan's scheduled reset dates.

Rates that move partly or with a lag

Savings accounts and certificates of deposit. Banks are not required to pass rate changes to depositors, and historically deposit rates at many large banks have risen more slowly than the fed funds rate when the Fed is tightening. Online banks and money market funds, which compete harder for deposits, usually pass through more of the change and do so faster. Money market fund yields track short-term Treasury bill and repo rates closely, so they tend to follow Fed moves within weeks.

Auto loans. Most car loans have a fixed rate for the life of the loan, so an existing loan is unaffected. Rates on new loans are influenced by the lender's funding costs, which follow short- and medium-term market rates, as well as competition and manufacturer promotions.

Private student loans with variable rates follow their benchmark. Federal student loans have fixed rates set once a year by a formula tied to the 10-year Treasury auction, not to the fed funds rate.

Mortgages: the big exception

The typical American mortgage is a 30-year fixed-rate loan. Its rate is driven mainly by long-term market rates, and in particular it tends to track the yield on the 10-year Treasury note, plus a spread. Long-term yields reflect what investors expect short-term rates, inflation and economic growth to be over many years, not what the Fed did at its latest meeting.

This is why mortgage rates sometimes rise after the Fed cuts, or fall before it cuts. If investors already expected a cut, it is priced in. If the Fed signals that fewer cuts are coming, or inflation expectations rise, long-term yields can go up even as the policy rate goes down.

Expectations matter as much as decisions

Financial markets price in expected Fed moves well before they happen. Much of the effect of a rate change on market rates occurs when investors come to expect it, through Fed officials' speeches, the post-meeting statement, the chair's press conference and the Summary of Economic Projections, which the FOMC publishes four times a year and which includes each participant's projection for the policy rate (the "dot plot").

For this reason, the language of a Fed announcement can move bond yields, and therefore mortgage rates, more than the decision itself.

What this means in practice

• Carrying a credit card balance? Every Fed move changes your rate within a month or two. Paying down variable-rate debt protects you from increases, and the benefit of a cut is usually small compared with the margin you already pay.
• Holding cash? Check what your bank pays compared with high-yield savings accounts, money market funds and Treasury bills. The gap can be several percentage points.
• Shopping for a mortgage? Watch the 10-year Treasury and weekly mortgage rate surveys rather than FOMC dates, and compare offers from several lenders on the same day.
• Have a fixed-rate loan? Nothing changes for you unless you refinance.

The bottom line

The Fed controls one short-term rate directly. Loans priced off prime and short-term benchmarks follow it closely; deposits follow it partly; fixed-rate mortgages follow long-term bond markets, which respond to the Fed's expected path more than to any single meeting.

This article is general information, not financial advice.