How to evaluate a high-yield savings account, May 2026.
"Best" depends on what you weigh. A short list of online banks dominates the high-yield category and tracks the federal funds rate. This page covers the dimensions that actually matter: APYAnnual Percentage Yield (APY)The real return on savings after the bank pays interest on top of interest. A 5% APY savings account turns $1,000 into $1,050 after one year.Full definition trajectory, FDICFederal Deposit Insurance Corporation (FDIC)The US agency that insures bank deposits up to $250,000 per depositor if a bank fails. coverage, withdrawal mechanics, account minimums, and how HYSAs compare with money-market funds for your emergency fund.
This page covers personal finance fundamentals that apply regardless of your view on Bitcoin or fiat currencyfiat currencyMoney declared legal tender by a government, not backed by a physical commodity. Its value rests on trust in the issuing government.Full definition.
HYSA yields track the federal funds rate within roughly 1.0 to 1.5 percentage points. With the Fed target range at 3.5% to 3.75% in May 2026, top HYSAs pay approximately 3.5% to 4.0% APY. A money-market fund at Fidelity (SPAXX, FZFXX, FDLXX) pays approximately 3.2% to 3.3% with similar safety and faster access to your brokerage. Evaluate on FDIC coverage, withdrawal friction, and rate stickiness, not on the headline APY alone.
Rate snapshot, May 2026
As of May 2026 the Federal Reserve target range for the federal funds rate is 3.5% to 3.75%, unchanged for the last two FOMC meetings, with the committee signaling "higher for longer" verify×DON'T TRUST, VERIFYClaim: Fed target range is 3.5% to 3.75% as of May 2026, with FOMC signaling no near-term cuts.Verify at: FOMC minutes ↗ · FRED target rate ↗Fed target range changes only at FOMC meetings. Confirm against the most recent statement.. HYSA APYs as a result run approximately 3.5% to 4.0% at the top of the market.
- Top online banks (Marcus, Ally, Discover, SoFi, Wealthfront, Bask, Bread): approximately 3.7% to 4.0% APY
- Big-bank standard savings (Chase, BofA, Wells Fargo): approximately 0.01% to 0.05% APY
- Fidelity SPAXX (money market, not technically a HYSA): 3.29% 7-day yield
- 4-week T-bill (TreasuryDirect, fully state-tax-exempt): approximately 3.5% to 3.7%
Rates move with the federal funds rate. Verify current APYs at the bank's product page before opening an account. Bankrate's HYSA tracker aggregates the current market.
How to evaluate an HYSA
The headline APY is the easy comparison. These four dimensions are the ones that actually determine whether the account fits your stack.
1. FDIC insurance
Verify the bank is FDIC-insured (most are; some "savings apps" route through partner banks and the coverage map is murky). The FDIC limit is $250,000 per depositor, per insured bank, per account ownership category verify×DON'T TRUST, VERIFYClaim: FDIC insurance limit is $250,000 per depositor, per bank, per ownership category.Verify at: FDIC deposit insurance ↗ · FDIC EDIE coverage calculator ↗FDIC has not changed the $250K limit since 2008. Verify current bank coverage at the FDIC BankFind tool.. A married couple has $500K of effective coverage on joint accounts.
Above $250K per bank, consider splitting across multiple FDIC-insured banks (an "ICS" or "DDA sweep" arrangement at some banks automates this) or using Treasury money-market funds, which have separate SIPCSecurities Investor Protection Corporation (SIPC)A nonprofit that pays back customers up to $500,000 if a stock brokerage firm goes bankrupt and loses their shares. It protects against the firm failing, not against your investments dropping in value. coverage and avoid the FDIC cap entirely.
2. Withdrawal mechanics
ACH out to your checking account is the standard withdrawal path. Speed varies: 1 to 3 business days at most online banks, same-day at a few. Wire transfers are faster but cost $10 to $30.
Some HYSAs are linked to a debit card or checking account for instant access. Others are intentionally "savings only" with no debit card, which adds 1 to 3 days of friction that many users find behaviorally useful.
3. Rate stickiness
Online banks adjust APY in response to Fed moves on different schedules. Marcus and Ally tend to be relatively sticky; SoFi and some newer entrants chase yield more aggressively in both directions. None pays guaranteed-for-12-months rates the way a CD does.
For more than a 1-month time horizon at a known yield, a Treasury bill or a CD is the alternative. See the comparison on I-bonds and T-bills.
4. Account minimums and fees
Most top HYSAs have no minimum balance and no monthly fees. Promotional or tiered rates that require $5,000+ balances are common; pick a base-rate account if you do not want to optimize tiers.
HYSA vs Fidelity money market fund
Fidelity's government money market funds (SPAXX, FZFXX, FDLXX) are the most common alternative to a standalone HYSA. They sit inside a Fidelity brokerage or cash management account, which means cash and investments live in one place.
- Yield (May 2026): HYSA ~3.7-4.0% vs SPAXX ~3.3%. Edge: HYSA, by approximately 40 basis points.
- Insurance: HYSA up to $250K FDIC. MMF is SIPC-protected as a security up to $500K (different mechanism; government MMFs are also extremely safe).
- Access to invest: HYSA requires an ACH out to brokerage to invest. MMF settles as cash inside the brokerage instantly.
- State tax: HYSA interest is fully taxable at federal and state levels. Government MMFs (especially FDLXX) get partial or full state-tax exemption on the Treasury portion. For high-state-tax residents this can offset most of the yield difference.
For a household that already uses Fidelity for investing, holding cash in SPAXX or FDLXX inside the brokerage often beats opening a separate HYSA, even with a 40-basis-point yield gap, because the friction of moving money between institutions is itself a cost. See cash management for the full framework and the money-market-comparison calculator to model your own state-tax-adjusted yield.
Fidelity CMA + FDLXX: the state-tax-aware HYSA replacement
The Fidelity Cash Management Account (CMA) is checking-account-shaped on the outside — bill pay, mobile check deposit, no-fee ATM use, debit card, FDIC-swept default cash balance. The interesting move is what you can hold inside it. By default the CMA sweeps cash to FDIC-insured partner banks; you can re-route into a money market fund manually. The most useful for high-state-tax households is FDLXX (Fidelity Treasury Only Money Market), which holds essentially 100% direct Treasury obligations and is correspondingly the most state-tax-friendly of the Fidelity MMF lineup verify×DON'T TRUST, VERIFYClaim: FDLXX holds almost entirely direct Treasury obligations, making its income substantially state-tax-exempt.Verify at: Fidelity FDLXX fund page ↗Verify the most recent annual letter for the exact percentage of US government obligations. Fidelity discloses the state-tax-exempt portion each January.. Fidelity discloses the state-tax-exempt percentage on FDLXX each January — recent years have been north of 95%.
SPAXX vs FDLXX vs HYSA after-tax (May 2026 rates)
The relevant comparison is not the headline 7-day yield. It is the after-state-tax yield in your specific state. Assume a top-of-market HYSA at 3.90% APY, SPAXX 7-day at 3.29%, FDLXX 7-day at 3.20% (slightly lower than SPAXX because pure-Treasury allocation runs a hair behind the broader government MMF in normal markets). Federal marginal rate held constant; state-marginal-rate is the variable.
| SCENARIO | HYSA AFTER-TAX | SPAXX AFTER-TAX | FDLXX AFTER-TAX | WINNER |
|---|---|---|---|---|
| No state tax (FL, TX, TN, NV, WA, WY, SD, NH) | ~3.90% | ~3.29% | ~3.20% | HYSA by ~60 bp |
| SC (~7% state top rate) | ~3.63% (3.90 × 0.93) | ~3.13% (taxable on commercial-paper slice) | ~3.19% (state-exempt on Treasury slice) | HYSA by ~44 bp, but FDLXX edge over SPAXX is real |
| CA (~13.3% state top rate) | ~3.38% (3.90 × 0.867) | ~3.00% (state hits commercial-paper portion) | ~3.19% (state-exempt on ~98% Treasury) | HYSA still wins but FDLXX beats SPAXX by ~19 bp |
| NYC resident (~10.9% state + 3.876% city) | ~3.32% | ~2.99% | ~3.18% | HYSA narrowly, but if convenience trumps 14 bp, FDLXX inside the CMA wins on workflow |
After-tax math uses simplifying assumptions (no AMTAlternative Minimum Tax (AMT)A second federal tax calculation. You compute your normal tax, you compute AMT, and you pay whichever is higher. Often triggered by employee stock options or large state-tax deductions.Full definition, federal marginal held constant). Run the actual numbers in the money-market comparison calculator with your full bracket stack.
When the CMA actually beats an HYSA
- High-state-tax resident with Fidelity already as the brokerage. The headline-yield gap is meaningfully smaller after state tax, and the workflow simplification (cash and investments in one place, instant settlement into ETFsExchange-Traded Fund (ETF)A basket of investments (stocks, bonds, or Bitcoin) that trades on a stock exchange like a single share.) often outweighs the remaining basis-point spreadspreadThe difference between the market price of Bitcoin and what an exchange actually charges you, a hidden cost on top of stated transaction fees.Full definition.
- Pre-move-to-no-tax-state planning. If you are in SC or CA today and planning to move to TX or TN, FDLXX still wins on federal taxes after the move (no state penalty in either jurisdiction). The decision is robust to the move.
- Single-institution preference. Households who value the discipline of a single financial brain (Fidelity for everything) over chasing the absolute top yield.
When an HYSA actually beats the CMA
- Institutional diversificationdiversificationSpreading investments across different assets so a drop in one doesn't devastate your entire portfolio.Full definition. A separate online bank for the emergency fund means a problem at Fidelity does not also lock your liquid cash. The probability of either institution failing is low; the cost of concentrating both at one institution is also low; pick your preference.
- Behavioral wall between checking and savings. Some households are better off with the deliberate friction of an ACH transfer between institutions. Money that sits inside the brokerage is easier to "accidentally" deploy than money that requires a 1–3 business day move.
- Promotional sign-up bonuses. New-account HYSA promos at SoFi, Wealthfront, and other online banks have run $200–500 in 2025–2026 for new deposits. A one-time cash bonus often beats years of basis-point optimization.
The honest read: the FDLXX vs HYSA debate is not "one of these is dramatically better." It is "in high-state-tax states the gap is much narrower than the headline 7-day yields suggest, and the workflow argument can plausibly flip the decision." See cash management · money market funds for the SPAXX/FZFXX/FDLXX side-by-side under one roof.
Who actually needs an HYSA
- Emergency fund (3 to 6 months of expenses): yes. HYSA or government MMF. Same logic.
- Down payment savings on a 1 to 3 year timeline: yes. T-bills or CDs may pay slightly more if you can lock the funds.
- "Sleep at night" cash on top of an emergency fund: personal preference. Some households want a year of expenses in HYSA in addition to an emergency fund; others run lean.
- Long-term wealth-building dollars: no. The opportunity costopportunity costWhat you silently give up when you pick one option over another. Spending $100 today on dinner means giving up whatever that $100 could have grown into if you had invested it instead.Full definition of HYSA vs equities or Bitcoin over 10-30 years is enormous. HYSA is for capital preservation, not capital growth.
Common questions
Why does my HYSA pay less than the Fed funds rate?
Banks earn the federal funds rate (or close to it) on reserves and short-term assets, then pass through a portion to depositors. The spread is bank profit margin. Online banks tend to pass through more of the rate than big banks because they compete on yield rather than branch convenience.
Are HYSAs safe?
Yes, up to the $250K FDIC limit per bank per ownership category. FDIC insurance has paid every covered depositor in full in every bank failure since 1933.
Is the interest taxable?
Yes, as ordinary income. The bank issues a 1099-INT for interest above $10. No special treatment.
Should I chase the highest APY?
Not for small differences. The behavioral cost of opening a third or fourth HYSA, remembering passwords, and managing the ACH plumbing typically exceeds the 25-basis-point yield bump. Stick with one or two well-known institutions and accept that you may give up 10 to 30 basis points versus the absolute top of the market.
What about credit union money markets?
Credit unions are NCUA-insured (equivalent to FDIC) up to the same $250K cap. Their rates are usually competitive with online banks, sometimes higher in promotional tiers. Worth checking if you are a member.
Related reading
- Cash management framework · the umbrella page
- Money market comparison calculator
- Banking · the broader account-architecture page
- I-bonds and T-bills · the term-locked alternatives
- Order of operations · where cash sits in the priority list
- Federal Reserve, FOMC minutes and target rate · federalreserve.gov
- FDIC deposit insurance rules · fdic.gov
- Fidelity, SPAXX/FZFXX/FDLXX fund pages · fidelity.com
- Bankrate HYSA rate tracker · bankrate.com
- FRED, effective federal funds rate (DFEDTARU) · fred.stlouisfed.org
Last updated 2026-05-16. Not financial advice. Do your own research.
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