Is a 1-year CD better than a Treasury bill for a 12-month hold?

Top 1-year CDs near 4.55% to 4.60% APY in October 2026 were comparable to 1-year Treasury yields near 4.5%. CDs carry FDIC insurance up to $250,000 per bank; Treasuries are backed by the U.S. government and may avoid state income tax. Compare after-tax yield and how quickly you can access cash without a penalty.

How do I build a CD ladder starting with 1-year terms?

Split savings into five equal tranches and open 1-, 2-, 3-, 4-, and 5-year CDs simultaneously. When the 1-year rung matures, reinvest into a new 5-year certificate at the prevailing top rate — 5.00% APY at Popular Direct in October 2026 — so one fifth of your ladder refreshes every year at peak yield.

What penalty applies if I break a 1-year CD early?

Many banks charge 3 to 6 months of interest. On $10,000 at 4.55% APY, that is roughly $114 to $228. If you withdraw in the first three months, the penalty can exceed accrued interest and reduce principal. Use a HYSA or no-penalty CD when access within 12 months is possible.

CD Interest scenario

1-Year CD Calculator — 12-Month APY & Total Interest

Calculate 12-month CD earnings at 4.55% APY on $10,000. FDIC national 1-year average 1.76% (Oct. 2026); top online CDs near 4.55% to 4.60%.

The 12-month CD remains the benchmark term banks and publishers quote when comparing rates. FDIC data for October 19, 2026 put the national average 1-year CD at 1.76%, while NerdWallet's October 20 roundup listed E*TRADE at 4.55% APY with no minimum and Popular Direct at 4.60% APY with a $10,000 minimum. The pre-filled calculator uses 4.55% and daily compounding — a realistic top-tier rate observation, not the branch-bank average most savers see on auto-renewal notices.

Initial Deposit

APY

Term

months

Compounding Frequency

Total at Maturity

$10,465.48

Interest Earned

$465.48

Stated APY

4.55%

Effective Annual Rate

4.65%

Month-by-Month Growth (First Year)

Month	Balance	Interest This Month	Total Interest
1	$10,037.99	$37.99	$37.99
2	$10,076.12	$38.13	$76.12
3	$10,114.39	$38.28	$114.39
4	$10,152.81	$38.42	$152.81
5	$10,191.38	$38.57	$191.38
6	$10,230.09	$38.71	$230.09
7	$10,268.95	$38.86	$268.95
8	$10,307.96	$39.01	$307.96
9	$10,347.12	$39.16	$347.12
10	$10,386.42	$39.30	$386.42
11	$10,425.88	$39.45	$425.88
12	$10,465.48	$39.60	$465.48

Key Considerations

At 4.55% APY with daily compounding, $10,000 matures at about $10,465 — $465 in guaranteed interest over 12 months.
That $465 is roughly $289 more than you would earn at the 1.76% FDIC national average on the same deposit, which is why rate shopping before each maturity matters.
Early withdrawal penalties on 12-month CDs often run 3 to 6 months of interest — on $10,000 at 4.55%, that is about $114 to $228, enough to erase most of your first-year yield.
Treasury bills near 4.5% yields in October 2026 compete with top CDs; Treasuries are state-tax-free while CD interest is ordinary income — run the after-tax math if you are in a high-tax state.
No-penalty 12-month CDs sometimes pay 0.25% to 0.50% less than standard CDs; weigh that spread against the cost of breaking a locked rate early.

Quick Numbers

Pre-filled APY	4.55%
Interest on $10,000 (12 mo)	$465
Maturity value	$10,465
FDIC national avg. (12 mo)	1.76%
Top online APY range	4.55% to 4.60%
Typical early penalty	3 to 6 months of interest

How This Compares

A 1-year CD at 4.55% APY earns about $245 more on $10,000 than a 6-month CD at 4.35% while keeping the commitment to a single calendar year. Versus a 5-year CD at 5.00% APY ($2,840 interest on $10,000), the 1-year term gives up roughly $2,375 of total yield but lets you reinvest if rates rise after the September 2026 Fed hike. Match the term to a dated expense — next year's tuition invoice, not your primary emergency buffer.

Frequently Asked Questions

Is a 1-year CD better than a Treasury bill for a 12-month hold?: Top 1-year CDs near 4.55% to 4.60% APY in October 2026 were comparable to 1-year Treasury yields near 4.5%. CDs carry FDIC insurance up to $250,000 per bank; Treasuries are backed by the U.S. government and may avoid state income tax. Compare after-tax yield and how quickly you can access cash without a penalty.
How do I build a CD ladder starting with 1-year terms?: Split savings into five equal tranches and open 1-, 2-, 3-, 4-, and 5-year CDs simultaneously. When the 1-year rung matures, reinvest into a new 5-year certificate at the prevailing top rate — 5.00% APY at Popular Direct in October 2026 — so one fifth of your ladder refreshes every year at peak yield.
What penalty applies if I break a 1-year CD early?: Many banks charge 3 to 6 months of interest. On $10,000 at 4.55% APY, that is roughly $114 to $228. If you withdraw in the first three months, the penalty can exceed accrued interest and reduce principal. Use a HYSA or no-penalty CD when access within 12 months is possible.

Sources FDIC National Rates and Rate Caps (Oct. 19, 2026), NerdWallet best CD rates (Oct. 20, 2026). Checked October 2026.