Yes, the APY on a bank account can change, and for most account types it changes often. Standard savings accounts, high-yield savings accounts, and money market accounts carry variable rates the bank can raise or lower at any time. Certificates of deposit are the exception: the APY is locked for the full term and only resets when the CD matures. With the federal funds rate sitting in the 3.50%–3.75% range as of early 2026, knowing which of your accounts can move, what moves them, and when the bank has to tell you is worth real money.
Which Accounts Have Rates That Change
The account type decides everything. Savings accounts, high-yield savings accounts, and money market accounts use variable rates. The bank can adjust the yield up or down whenever it wants, and the only guarantee is that you can access your money without penalty. When rates across the economy move, so does your return.
CDs work differently. When you open a CD for a set term, the bank commits to paying that specific rate until the account matures. A 12-month CD opened at 4.50% pays 4.50% for the full year regardless of what happens in the broader market. That protection cuts both ways. If rates climb, you’re stuck earning the lower rate you locked in. If rates fall, your locked-in rate looks increasingly attractive.
Tiered-rate accounts add a wrinkle. Your effective APY can shift not because the bank changed its schedule but because your balance crossed into a different tier. A savings account might pay 0.25% on balances under $5,000 and 3.75% above that threshold. Regulation DD requires banks that advertise tiered accounts to list the minimum balance needed for each tier alongside the corresponding yield.
What Makes Variable APYs Move
The Federal Open Market Committee sets a target range for the federal funds rate, which is essentially the price banks pay to borrow from each other overnight. When the FOMC raises that target, borrowing gets more expensive across the financial system, and banks tend to offer higher APYs to attract deposits. When the FOMC cuts the target, the opposite happens.
Banks don’t move in lockstep with the FOMC, though. A bank flush with cash reserves has less reason to compete for deposits and might lag rate increases or cut faster than competitors. A bank that needs deposits to fund lending does the opposite, sometimes pushing its APY above the market to pull in new customers. Online-only banks consistently offer higher yields than traditional brick-and-mortar institutions because they operate with lower overhead, and that competitive pressure forces traditional banks to respond.
So two banks can respond to the same FOMC decision very differently. One might raise its savings APY within days. Another might wait weeks, or not move at all. This is where most people leave money on the table, assuming all banks adjust in unison when they absolutely do not.
How Often Rates Change
Variable-rate accounts have no set schedule. A bank might adjust its APY daily, weekly, monthly, or only after a major FOMC decision. There’s no regulatory requirement to change rates on a particular timeline, and banks aren’t required to wait for any specific trigger before moving. In practice, most changes cluster around FOMC announcements, but competitive moves happen independently.
Fixed-rate CDs change only at maturity. When the term ends, most banks provide a brief grace period, typically seven to ten days, during which you can withdraw the funds, change the term, or roll into a new CD without penalty. If you do nothing during the grace period, the bank usually reinvests your balance into a new CD at whatever rate it’s currently offering, which may be higher or lower than what you earned before. Miss that window and your money is locked in again at a rate you didn’t actively choose.
Will the Bank Tell You Before an APY Change
The Truth in Savings Act, implemented through Regulation DD, sets rules for how banks communicate rate changes to consumers. For changes that reduce the APY or add new fees, the bank must mail or deliver a written notice at least 30 calendar days before the change takes effect.
There’s a major exception. Variable-rate accounts are exempt from this advance-notice requirement. Because the bank disclosed at account opening that the rate could change, it doesn’t have to send you a heads-up each time it adjusts the yield. The new rate simply appears on your next statement. The burden of monitoring falls entirely on you. If your high-yield savings account drops from 4.50% to 3.80%, you might not notice until you review your statement weeks later.
These consumer protections apply only to personal accounts. Regulation DD covers accounts held for personal, family, or household purposes. Business deposit accounts, including those held by sole proprietors, fall outside the regulation entirely, so business account holders have even fewer guaranteed disclosures.
Promotional Rates Are Built to Change
Many banks offer promotional APYs to attract new customers, and these rates deserve special attention because they’re designed to expire. A bank might advertise 4.75% on a new savings account, but that rate only lasts for a set period. Six months is common. After it ends, the account drops to the bank’s standard variable rate, which can be significantly lower.
Regulation DD requires banks to disclose the time period a promotional rate will be offered and any minimum balance needed to qualify. For bonus offers tied to opening an account, the bank must disclose the amount or type of bonus, when it will be paid, and the balance and time requirements to earn it. These disclosures appear in the account agreement and in advertising materials. The catch is that many people open the account, enjoy the promotional rate, and then forget to check what happens afterward. A calendar reminder for the expiration date is the simplest fix.
What to Do About Rate Changes
Knowing that APY can change is only useful if you act on it. A few practical habits make a real difference:
- Monitor your rate, not just your balance. Most people check the balance but never look at the current APY. Variable rates can drift downward without any notification, and even a small drop compounds over time. Check quarterly at minimum.
- Compare across banks regularly. Online banks frequently offer APYs double or triple what traditional banks pay on the same type of account. Moving a savings balance takes a few days and costs nothing.
- Set an expiration reminder for any promotional rate. When it expires, decide whether the standard rate is competitive enough to keep the account or whether your money should move.
- Treat CD maturity as a decision, not an auto-renewal. The seven-to-ten-day grace period is your window to reassess. Don’t let the bank roll your balance into a new term at a rate you haven’t reviewed.
- Match the product to your timeline. Money you might need in six months belongs in a variable-rate account, not a five-year CD. Money you genuinely won’t touch earns more in a longer-term fixed product, especially if current rates look favorable.
APY changes are a certainty for variable accounts and a scheduled event for fixed ones. Neither type requires you to be passive about it.