After-tax cash yields, all 50 states + DC

Top marginal state rate; federal tax not deducted here (it hits every option equally).

StateTop rate#1After state tax#2After state tax
Alabama5.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Alaskanone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Arizona2.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Arkansas3.90%52-wk T-billT-bill4.62%26-wk T-bill4.37%
California13.30%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Colorado4.40%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Connecticut6.99%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Delaware6.60%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Floridanone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Georgia5.19%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Hawaii11.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Idaho5.30%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Illinois4.95%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Indiana2.95%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Iowa3.80%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Kansas5.58%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Kentucky3.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Louisiana3.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Maine7.15%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Maryland6.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Massachusetts9.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Michigan4.25%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Minnesota9.85%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Mississippi4.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Missouri4.70%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Montana5.65%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Nebraska4.55%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Nevadanone52-wk T-billT-bill4.62%26-wk T-bill4.37%
New Hampshirenone52-wk T-billT-bill4.62%26-wk T-bill4.37%
New Jersey10.75%52-wk T-billT-bill4.62%26-wk T-bill4.37%
New Mexico5.90%52-wk T-billT-bill4.62%26-wk T-bill4.37%
New York10.90%52-wk T-billT-bill4.62%26-wk T-bill4.37%
North Carolina3.99%52-wk T-billT-bill4.62%26-wk T-bill4.37%
North Dakota2.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Ohio2.75%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Oklahoma4.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Oregon9.90%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Pennsylvania3.07%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Rhode Island5.99%52-wk T-billT-bill4.62%26-wk T-bill4.37%
South Carolina6.00%52-wk T-billT-bill4.62%26-wk T-bill4.37%
South Dakotanone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Tennesseenone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Texasnone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Utah4.50%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Vermont8.75%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Virginia5.75%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Washingtonnone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Washington DC10.75%52-wk T-billT-bill4.62%26-wk T-bill4.37%
West Virginia4.82%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Wisconsin7.65%52-wk T-billT-bill4.62%26-wk T-bill4.37%
Wyomingnone52-wk T-billT-bill4.62%26-wk T-bill4.37%
Not financial advice. Rankings are mechanical calculations from published yields and issuer tax data. They ignore fees you pay your broker, trading spreads, minimums, liquidity, and your full tax picture. Check the source links before acting.