CD Ladders vs Treasury Bills: Which Wins in 2026?

With cash yields above 4% in 2026, the question of where to park liquid savings has stopped being academic. CD ladders and Treasury bill ladders both work — but the right choice depends heavily on your federal bracket, your state of residence, and how often you might need the money back.

The two products in 30 seconds

The state-tax wedge that changes the answer

Treasury bill interest is exempt from state and local income tax. CD interest isn't. So even when nominal yields look identical, the after-tax yields can differ significantly:

• California (13.3% top): T-bill at 5.0% beats CD at 5.5% on after-tax basis.
• New York (10.9% top): T-bill at 5.0% beats CD at 5.4%.
• Texas / Florida (0%): no advantage — go for the higher nominal rate.

Liquidity: who actually wins

Both are illiquid in the sense that you should hold to maturity. The difference is what happens if you can't:

• Bank CD early-out penalty: typically 3 months interest on short-term CDs, 6 months on longer. Predictable, formulaic.
• Brokered CD secondary market: you can sell early, but at the prevailing market price — which may be below par if rates have risen since you bought.
• T-bill secondary market: deeply liquid. You can sell any T-bill on TreasuryDirect or your brokerage at the current market price within a day. Same interest-rate risk as brokered CDs.

The ladder structure (works the same for both)

A ladder spreads maturities across multiple rungs so you have something maturing at regular intervals. A 12-month ladder of $5,000 each at 1, 2, 3, 4 months means $5,000 matures every month (after rollover begins), giving you a regular source of available cash plus the average of recent rates.

Ladder benefits

• Cash availability without paying early-out penalties.
• Reduces interest-rate risk — you're always re-pricing some of your money.
• Captures longer-end yields without locking up everything.

Where to buy each

• Bank CDs: direct from your bank or credit union. Typically the best rates come from online banks (Marcus, Ally, Synchrony, Capital One) rather than brick-and-mortar branches.
• Brokered CDs: through Fidelity, Schwab, Vanguard, etc. Aggregates rates from many banks. Convenient inside an existing brokerage account; tradable on secondary market.
• T-bills via TreasuryDirect: free, direct from the US Treasury. Can't be sold there — must hold to maturity or transfer out.
• T-bills via brokerage: Fidelity / Schwab let you buy at auction or on the secondary market. Better for ladders because you can manage them in one account.
• T-bill ETFs (BIL, SGOV, USFR): instant liquidity, automatic ladder, slight expense ratio (0.07–0.15%). Loses the state-tax exemption only if held in a fund that mixes other instruments — pure-Treasury ETFs preserve it.

Special case: high-yield savings (HYSA)

If your alternative is a 4.5% HYSA with full liquidity and no maturity, the bar for CDs and T-bills is whether they pay enough more to justify the term commitment. In an inverted yield curve (which has been the norm 2023–2026), short-term yields can be higher than long, which actually favors HYSA over a 5-year CD.

Which to pick

• Live in a high-tax state (CA, NY, NJ, OR): default to T-bills.
• Live in a no-income-tax state: compare nominal yields; CDs often win by 10–25 bps.
• Want maximum simplicity: T-bill ETF (SGOV, USFR) or brokered CD ladder in your existing brokerage.
• Have $250K+ at one bank already: T-bills sidestep FDIC limits since they're Treasury-backed regardless of size.
• Need cash unpredictably: HYSA + small ladder, not a deep ladder of either product.