High-Yield Savings vs. CDs vs. T-Bills: Where to Park Cash in 2026
All three pay 4-5% right now. Here's which fits your liquidity needs.
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For the first time in 15 years, cash actually pays. High-yield savings accounts, certificates of deposit, and Treasury bills all yield in the 4-5% range. They look almost identical at a glance — and the differences are where the real money is.
High-yield savings accounts (HYSAs)
Online banks (Ally, Marcus, SoFi, Wealthfront) consistently pay 10-20x what brick-and-mortar banks offer. Money is FDIC insured up to $250k per depositor per bank, withdrawals settle in 1-2 business days, and there are no minimums or lockups.
The catch: rates float. When the Fed cuts, your yield drops within weeks. HYSAs are the right home for emergency funds and money you might need in the next 12 months.
Certificates of deposit (CDs)
A CD locks your rate for a fixed term — 3 months to 5 years. Break it early and you forfeit 3-6 months of interest. The trade is simple: you give up liquidity in exchange for rate certainty.
CDs are most useful when you expect rates to fall and you have a known timeline (a home down payment in 18 months, a tax bill due next April). Build a CD ladder — equal amounts maturing every 6 months — to keep some liquidity while locking yield.
Top 4.5%+ savings accounts
Updated weekly — FDIC insured, no minimums.
Treasury bills
T-Bills are short-term US government debt (4, 8, 13, 17, 26, 52 weeks). They are the safest dollar-denominated asset on Earth and — critically — interest is exempt from state and local income tax.
In a high-tax state like California (13.3%) or New York City (10.9%), a 4.8% T-Bill beats a 5.0% HYSA on an after-tax basis. Buy them free at TreasuryDirect or inside a brokerage account at Fidelity, Schwab, or Vanguard.
Side-by-side
- HYSA — fully liquid, FDIC insured, floating rate. Best for emergency fund.
- CD — locked term, FDIC insured, fixed rate. Best when rates may fall and you have a date in mind.
- T-Bill — locked term, US government backed, state-tax-free. Best for taxable money in high-tax states.
- Money market fund — near-instant liquidity, very low risk, yields close to T-Bills. Great in a brokerage.
What to avoid
Big-bank savings accounts paying 0.01-0.5%. Promo rates that drop after 3 months. CDs at your local bank when the online equivalent pays a full point more. Always compare against the current 4-week T-Bill yield as your benchmark.
If your savings account pays less than the current 4-week T-Bill, you're donating money to your bank.
Frequently asked questions
Are CDs worth the lockup?+
Only if the CD rate is meaningfully above the best HYSA AND you have a defined timeline for the money. Otherwise stay in a HYSA or T-Bills.
Is my HYSA actually safe?+
Yes, up to $250k per depositor per bank under FDIC insurance. For more, split across banks or use a brokered cash sweep that spreads coverage.
How do T-Bills get bought?+
Easiest: inside your brokerage, search for the auction or buy on the secondary market. TreasuryDirect.gov is free but clunky.
What about I-Bonds?+
Good for inflation protection but capped at $10k/year and locked for a year. Not a substitute for an emergency fund.
Should I chase the highest rate?+
Mostly. Just verify FDIC membership and avoid teaser rates that reset after 90 days.
Personal finance writer and ex-banker. Pays off his cards weekly.
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