Anytime, with no notice. HYSA rates are variable by definition — the bank can change them daily, weekly, or monthly at its sole discretion. In practice, most online banks adjust within 30-60 days of a Fed funds rate move. Between 2020 and 2024 the average HYSA went from 0.50% to over 5.00%; by mid-2026 most sit around 4.00-4.50% after Fed cuts.
HYSA APYs are variable rates. The bank can change them at any time, for any reason, with no advance notice to you. There is no rate guarantee in a savings account, no matter what the marketing says about being a "high-yield" account.
In practice, most online banks reprice their HYSA in waves — typically within 30 to 60 days after a Federal Reserve change to the federal funds rate. Some move within a week (Ally, Marcus tend to be quick on the way up). Some lag for months (especially on the way down, where banks pocket the spread).
The rate you see today is not the rate you'll get next quarter. A 4.50% HYSA in June can be a 3.75% HYSA in December if the Fed cuts twice. That's a $1,875/year difference on a $250,000 balance.
If you need a rate that doesn't move, you need a fixed-rate product — a CD (FDIC-insured, fixed 3-60 months) or a MYGA (insurance contract, fixed 2-10 years). Both lock today's rate so a future Fed cut can't drag your yield down with it.
| Period | Avg top-10 HYSA APY | Driver |
|---|---|---|
| Mid 2020 (post-COVID) | 0.50% | Fed funds at 0.00-0.25% |
| 2021 average | 0.45% | Fed still at zero |
| Mid 2022 | 1.50% | Fed starts hiking |
| Mid 2023 | 4.50% | Fed funds 5.00-5.25% |
| Late 2024 peak | 5.00-5.30% | Fed funds 5.25-5.50% |
| Mid 2026 (current) | 4.00-4.50% | Fed cuts since late 2024 |
Translation: in 4 years, the top HYSA went from 0.50% to 5.30% — a 10x swing. Anyone who assumed the 0.50% rate or the 5.30% rate was permanent was wrong both times.
You put $200,000 in a HYSA at 5.00% in January 2024. Your assumed annual interest: $10,000.
The Fed cuts 100 basis points over the next 12 months. Your bank passes most of that through — your rate drops to 4.00% by mid-year, 3.75% by year-end. Actual interest earned: roughly $8,400. You "lost" $1,600 to repricing.
Same $200,000 in a 5-year MYGA at 5.40% (locked Jan 2024): $10,800/year, every year, for 5 years. Total 5-year edge over the dropping HYSA: easily $6,000-$10,000 depending on Fed path.
HYSAs are the right tool when (a) the money is needed soon, or (b) you actively want to ride rates higher if the Fed hikes. They're the wrong tool when you want rate certainty.
The decision tree most people should run on their cash pile:
I'm Hans Goldstein — independent licensed insurance producer (NPN 20602398), appointed with multiple A-rated carriers. I don't sell HYSAs (banks do), but I run the math against CDs and MYGAs every week for retirees and pre-retirees. Tell me how much cash you're parking and how soon you need it — I'll send back a one-page comparison.
Hans Goldstein · 213-414-2808 · NPN 20602398 · independent, appointed with multiple A-rated carriers
This article is general educational information, not personalized financial, tax, or legal advice. HYSA APYs, CD rates, and MYGA rates change frequently — confirm current figures with the bank or carrier and the actual contract or account agreement before acting. FDIC insurance covers deposits at member banks up to $250,000 per depositor, per insured bank, per ownership category. State insurance guaranty associations cover annuity contracts up to state-specific limits (typically $250,000-$300,000). Hans Goldstein is an independent licensed insurance producer (NPN 20602398). No compensation has been received from any bank or carrier in connection with this article. Past rates do not predict future rates. Tax discussion reflects federal law as of 2026 and is subject to change; consult a CPA for your specific situation.