CDs vs. Treasuries: Five Factors, and the One That Usually Decides It

CDs and Treasuries are both high-quality homes for cash, and the right choice usually comes down to taxes. Treasury interest is exempt from state and local income tax; CD interest is not. For investors in income-tax states holding cash in taxable accounts, that exemption often makes a Treasury with a lower stated yield pay more after tax than a CD with a higher one. Safety, yield, maturity, and liquidity each matter, but for taxable money in a state like Wisconsin, the state tax factor decides most contests.

Factor 1: How safe is each one?

Both sit at the top of the credit spectrum, but the protection works differently.

CDs are bank deposits insured by the FDIC up to $250,000 per depositor, per insured bank, per ownership category. The insurance is excellent but bounded: a couple holding $2 million of CDs at one bank in one ownership category is mostly uninsured, and staying covered at that scale means spreading deposits across multiple banks or titling structures. Above the limits, you are an unsecured creditor of the bank.

Treasuries are direct obligations of the United States, backed by its full faith and credit with no dollar cap. There is no per-account limit to manage and no bank-failure scenario to think through. For seven-figure cash balances, this is not a tie: Treasuries remove an administrative burden that FDIC limits impose on large depositors.

Factor 2: Which yields more right now?

As of mid-June 2026, the 1-year Treasury yielded 3.85 percent (U.S. Treasury daily yield curve, June 11, 2026). The best nationally available 1-year CDs paid around 4.10 to 4.11 percent APY, while the national average 1-year CD paid only about 1.98 percent (Bankrate, June 12, 2026).

Two lessons sit in those numbers. First, the average CD is not competitive with anything; banks count on depositor inertia, and rolling over whatever your branch offers is usually the worst option on this page. Second, top CDs currently out-yield Treasuries by roughly a quarter of a percentage point before tax. That headline gap is real, and in a tax-deferred account it is the end of the analysis. In a taxable account it is not, as the next factor shows.

Factor 3: How do taxes change the answer?

Both CD and Treasury interest are taxed as ordinary income federally. The difference is at the state line: Treasury interest is exempt from state and local income tax under federal law, while CD interest is fully taxable by your state.

Here is a hypothetical worked example for a Wisconsin resident in the state's top 7.65 percent bracket, investing $500,000 of taxable cash for one year at the June 2026 rates above.

• Top 1-year CD at 4.10 percent: $20,500 of interest. Wisconsin tax at 7.65 percent takes $1,568, leaving $18,932 after state tax, an effective yield of about 3.79 percent.
• 1-year Treasury at 3.85 percent: $19,250 of interest, none of it taxable by Wisconsin, leaving $19,250, an effective 3.85 percent.

The Treasury wins by roughly $318 despite a headline yield 0.25 points lower. The breakeven is simple arithmetic: divide the Treasury yield by one minus your state rate. At 7.65 percent, a CD must pay about 4.17 percent to match a 3.85 percent Treasury, and as of mid-June 2026 no nationally available 1-year CD cleared that bar. Federal tax applies equally to both and largely drops out of the comparison; for most high earners the state tax paid on CD interest produces no offsetting federal benefit once the SALT deduction cap is absorbed by other taxes. Wisconsin investors can find the full state tax picture in our Wisconsin wealth guide.

The exception worth naming: in IRAs and 401(k)s, no state tax applies to either, so the higher headline yield simply wins. Residents of states with no income tax can also take the CD's extra yield at face value.

Factor 4: Which offers better maturities?

Treasuries cover the entire curve: bills from 4 weeks to 52 weeks, notes from 2 to 10 years, bonds to 30 years, plus inflation-protected TIPS. New supply is auctioned continuously, so any ladder structure you want can be built and rebuilt indefinitely.

CDs concentrate where banks want funding, mostly 3 months to 5 years, and attractive rates appear unevenly across terms. Promotional rates often apply to odd terms like 7 or 13 months and reset to mediocre rates at renewal. Callable brokered CDs add another wrinkle: the bank can redeem them early when rates fall, which is precisely when you want to keep the yield. For multi-year planning, the Treasury market's depth and regularity are a structural advantage.

Factor 5: What if you need the money early?

This is the most underrated difference. Treasuries trade in the deepest securities market in the world; selling before maturity takes moments at a tight bid-ask spread, with a price that may be above or below your cost depending on where rates have moved.

Bank CDs typically impose early-withdrawal penalties, commonly several months of interest, and some institutions can refuse early redemption entirely. Brokered CDs have no withdrawal option at all; they must be sold on a thin secondary market where wide spreads can cost far more than a bank penalty would. Cash that might be needed on short notice is better held in Treasuries, money market funds, or true savings vehicles than locked into a CD term.

So which one should you buy?

For taxable accounts in income-tax states, the state tax exemption is usually the deciding factor, and it points to Treasuries unless a CD's pre-tax yield beats the breakeven math in Factor 3. Run the breakeven at your own state rate before buying either. For retirement accounts and no-income-tax states, buy whichever yields more for the term you want, mindful of call features and renewal rates. For sums above FDIC limits, Treasuries also remove the multi-bank juggling that large CD positions require.

Whichever instrument wins, laddering does the structural work: staggering maturities, for example every quarter across one to two years, keeps cash flowing back on schedule, reduces the bet on any single rate, and pairs naturally with the Liquidity strategy in our goals-based framework. The broader architecture of reserves, sweeps, and money funds is covered in our guide to cash management for wealthy families, and the underlying tax mechanics in our primer on how investment income is taxed.

Key numbers

Frequently asked questions

Are Treasuries safer than CDs?Both are extremely safe within FDIC limits. Treasuries carry the direct backing of the U.S. government with no dollar cap, while CD protection ends at $250,000 per depositor, per bank, per ownership category, which makes Treasuries simpler for large balances.

Do you pay state taxes on Treasury interest?No. Interest on Treasury bills, notes, and bonds is exempt from state and local income tax, though it remains fully taxable at the federal level.

When does a CD beat a Treasury?In tax-deferred accounts, in states with no income tax, or whenever the CD's yield exceeds the Treasury yield divided by one minus your state tax rate. Verify the CD is not callable and check the renewal rate before committing.

Can I lose money selling a Treasury before maturity?Yes. If rates have risen since purchase, the market price will be below your cost. Held to maturity, you receive full face value.

What about Treasury money market funds instead of either?Funds holding mostly Treasury securities pass through largely state-tax-exempt income with daily liquidity, at the cost of a floating yield and a fund expense ratio. They suit operating cash; bills and CDs suit money with a known date.

Is laddering worth the effort?For cash beyond a few months of spending, usually yes. A ladder smooths reinvestment risk and returns principal on a schedule, and at current volumes most custodians make Treasury ladders nearly effortless to maintain.