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Savings, CDs and tax

Washington, DC After-Tax Yield Calculator

What a savings account or CD keeps after Washington, DC's income tax (4% to 10.75% in 2026) and federal tax, and whether a Treasury bill, which Washington, DC can't tax, keeps more.

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Savings keeps, after tax3.13%The answer

Savings keeps, after tax

3.13%

In Washington, DC, a 4.5% APY keeps 3.13% after 22% federal and 8.5% state tax. A 4% Treasury bill, which Washington, DC can't tax, keeps 3.12%, so the savings account keeps 0.01% more.

Treasury bill keeps, after tax
3.12%
Better after tax
Savings or CD
Treasury yield that matches the APY
4.01%

Washington, DC income tax brackets, 2026 (taxable income)

RateSingle filersMarried filing jointly
4.00%$0 to $10,000$0 to $10,000
6.00%$10,000 to $40,000$10,000 to $40,000
6.50%$40,000 to $60,000$40,000 to $60,000
8.50%$60,000 to $250,000$60,000 to $250,000
9.25%$250,000 to $500,000$250,000 to $500,000
9.75%$500,000 to $1,000,000$500,000 to $1,000,000
10.75%Over $1,000,000Over $1,000,000

What a 4.50% APY keeps in Washington, DC, by state bracket (22% federal bracket)

Washington, DC rateSavings or CD keepsT-bill yield that matches it
4.00%3.33%4.27%
6.00%3.24%4.15%
6.50%3.22%4.13%
8.50%3.13%4.01%
9.25%3.09%3.97%
9.75%3.07%3.94%
10.75%3.03%3.88%

How this calculator works

Bank interest (savings, money market and CDs) is ordinary income to Washington, DC and to the IRS. After-tax yield = APY × (1 − federal rate − Washington, DC rate − local rate).

Treasury bills, notes and bonds are taxed only federally: federal law bars states from taxing their interest (31 U.S.C. 3124). After-tax yield = T-bill yield × (1 − federal rate).

The Washington, DC rates are its 2026 brackets as compiled by the Tax Foundation from state law. Choose the bracket your taxable income falls in; the calculator starts at the rate for a single filer with $75,000 of taxable income (8.50%).

Questions people ask

Does Washington, DC tax interest from savings accounts and CDs?

Yes. Washington, DC taxes bank interest as ordinary income at 4% to 10.75% in 2026, on top of federal income tax.

Are Treasury bills taxable in Washington, DC?

No. Interest on Treasury bills, notes, bonds and US savings bonds is exempt from Washington, DC income tax by federal law. It is still taxed federally.

Is a T-bill or a CD better in Washington, DC?

At Washington, DC's 8.50% rate and a 22% federal bracket, a 4.50% CD keeps 3.13%, the same as a T-bill yielding 4.01%. A T-bill paying more than that keeps more.

Do Treasury money market funds avoid Washington, DC tax?

Most states let you exclude the share of a fund's dividends that came from Treasury interest. Check Washington, DC's income tax instructions for the rule and the percentage your fund reports.

Other states

Terms explained

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Sources

Updated by the RateHerald team. The maths is tested against worked examples; report a problem.