How often the APY changes depends entirely on the type of account you hold. On a variable-rate savings or money market account, the APY can move at any time, with no advance notice, and it most commonly shifts in the days or weeks following one of the Federal Reserve’s rate decisions. On a fixed-rate certificate of deposit, the APY doesn’t change at all during the term you agreed to. Between those two poles sit specialty CDs whose rates change on a set schedule or on request.
APY Change Frequency by Account Type
Variable-Rate Savings and Money Market Accounts
High-yield savings accounts and money market accounts carry variable rates. Your bank can raise or lower the APY at any time based on market conditions or its own financial goals. You might see a 4.50% APY one week and 4.25% the next, with no change in your balance and no prior warning. There is no minimum interval and no cap on how many times per year the rate can move. In practice, most depositors see several changes a year, clustered around Fed decisions and competitor moves.
Fixed-Rate CDs
A standard CD locks in your APY for the full term, whether that’s a few months or several years. The rate does not change once you open the account, regardless of what the Fed does afterward. The trade-off is liquidity: withdrawing early triggers a penalty that commonly ranges from 60 to 365 days of interest, depending on the bank and the length of the CD.
Bump-Up and Step-Up CDs
Bump-up CDs let you request one rate increase during the term if the bank’s posted rate has risen since you opened the account. The request is not automatic; you have to ask, and most products allow only a single bump. Step-up CDs raise the APY automatically at intervals written into the contract when you open the account. In both cases, the frequency of change is defined up front rather than left to the bank’s discretion.
The Fed’s Meeting Calendar Sets the Rhythm
The Federal Open Market Committee sets the target range for the federal funds rate, the rate banks charge each other for overnight lending.1Federal Reserve Bank of New York. Effective Federal Funds Rate The FOMC holds eight regularly scheduled meetings each year, roughly once every six to seven weeks, plus additional meetings if economic conditions call for them.2The Federal Reserve. FOMC Calendars and Information As of January 2026, the target range sits at 3.50% to 3.75%.3The Federal Reserve. The Fed Explained – Accessible
When the FOMC raises or lowers the target, usually by 25 to 50 basis points at a time, the change ripples through the broader economy. Banks borrow from each other at rates tied to this benchmark, so the cost of the money they lend rises or falls accordingly. They then adjust what they pay depositors to protect their margins. Each of those eight annual meetings is a moment when your variable APY may shift, which is why savings-rate movement tends to cluster on the Fed’s calendar rather than spread evenly through the year.
How Quickly Banks Pass Fed Changes Through
No law requires a bank to change its deposit rates within any set number of days after a Fed announcement. Adjustments tend to happen gradually rather than in a single jump, and the direction matters. Banks often move quickly to lower rates after a cut, because reducing APYs shrinks their interest expenses immediately. After a hike, banks sometimes wait longer before passing the benefit along to depositors. Keeping the old, lower rate widens their profit margin until competitive pressure forces them to match the market.
Where you bank also shapes the timing. Online-only banks tend to respond faster than traditional brick-and-mortar institutions. Without physical branch overhead, they rely heavily on attractive APYs to draw new customers, so when a competitor raises its rate, others often follow within days to stay near the top of comparison sites. Traditional banks, which lean more on branch convenience and long-standing customer relationships, may take weeks or longer to adjust.
Why Your Rate Can Move Between Fed Meetings
The federal funds rate is not the only thing pushing your APY around. Banks also adjust yields based on how badly they need deposits. A bank gearing up to fund a wave of new loans may raise its APY to attract fresh capital even if the Fed has not changed rates. A bank sitting on excess cash may keep its rates low to avoid paying more interest than necessary. This internal balance-sheet management explains why two banks can offer noticeably different APYs on nearly identical products at the same time, and why your rate can move on a random Tuesday with no Fed news attached.
Promotional or “teaser” rates add another layer of change. These are temporarily elevated APYs designed to attract new deposits, and they typically last a few months before dropping to the bank’s standard rate, which may be significantly lower. Before opening an account based on a promotional APY, check what the rate will be once the introductory period ends. That post-promotion rate is what you’ll actually earn for the long run.
What Notice You Get Before a Cut
Regulation DD, the federal rule implementing the Truth in Savings Act, governs how banks communicate rate changes. At account opening, your bank must tell you that the interest rate and APY on a variable-rate account may change.4eCFR. 12 CFR Part 1030 – Truth in Savings (Regulation DD) After that, the bank does not have to give you advance notice before lowering your variable-rate APY. You may discover the cut only when you check your online dashboard or read your next periodic statement.
The rules are stricter for non-rate changes that hurt you. If a bank wants to increase a monthly maintenance fee or impose a new charge, it must mail or deliver notice at least 30 calendar days before the change takes effect.5eCFR. 12 CFR 1030.5 – Subsequent Disclosures For APY changes themselves, though, checking your statements and account alerts regularly is the most reliable way to catch a drop.