Where to keep cash in Oklahoma

Why Treasuries win in Oklahoma

Savings accounts, CDs and most money funds pay interest that Oklahoma taxes at up to 4.50%. Treasury bills don’t. So a Treasury bill paying 4.50% keeps what a fully taxable account paying 4.85% would, for a top-bracket Oklahoma resident. Today the best 1-year CD we track pays 4.65% and the best savings account 3.55%.

Municipal money funds in Oklahoma

We don’t list a money fund that holds only Oklahoma municipal debt. A national municipal fund is free of federal tax but generally taxed by Oklahoma; for a top-bracket resident it needs at least 2.97% to beat a 1-year Treasury bill.

Oklahoma taxes on cash, in brief

• Top income tax rate: 4.50%. Your own rate may be lower; change it above.
• Interest on U.S. Treasury bills, notes and bonds: exempt from state and local income tax, taxed federally.
• Savings accounts, CDs and prime or government money funds: taxed by Oklahoma, except the share of a fund’s income that comes from U.S. Treasuries.

Questions

Is Treasury bill interest taxed in Oklahoma?

No. Interest on U.S. Treasury bills, notes and bonds is exempt from state and local income tax under federal law, so Oklahoma doesn’t tax it. It is still subject to federal income tax. Interest from savings accounts and CDs is taxed by Oklahoma at up to 4.50%.

Where should I keep cash in Oklahoma?

At Oklahoma’s top rate and 37% federal, a 1-year Treasury bill keeps the most after tax today (4.50%). The answer depends on your brackets; the calculator on this page updates for yours.

What rate does a CD need to beat Treasury bills in Oklahoma?

At Oklahoma’s top rate and 37% federal, a CD or savings account needs at least 4.85% to keep as much as a 1-year Treasury bill paying 4.50%.

Rates: each provider’s own page and the U.S. Treasury, October 27, 2026. State rates: Tax Foundation, 2026 (top single-filer rate; local taxes not included). General information, not tax advice. Other states →