What is the St. Louis earnings tax?

St. Louis imposes a flat 1% earnings tax on the income of city residents and on wages earned in the city by non-residents. It is a distinct local layer collected on top of Missouri state income tax, not part of it.

Do non-residents pay the St. Louis earnings tax?

Yes. Non-residents who work within St. Louis city limits owe the 1% earnings tax on the wages they earn in the city. Income earned outside the city is generally not subject to it.

Is the earnings tax the same as Missouri state income tax?

No. Missouri state income tax is graduated, with a top marginal rate near 4.7%. The St. Louis earnings tax is a separate flat 1% local charge that stacks on top of the state tax.

Does this include federal income tax?

No. This calculator covers only Missouri state tax and the St. Louis local earnings tax. Federal income tax, FICA, and any other withholdings are calculated separately.

How accurate are these figures?

The tool uses representative Missouri brackets and the flat 1% earnings tax for a quick estimate. Your real liability depends on filing status, credits, and deductions, so treat the result as a planning estimate, not tax advice.

St. Louis City Income Tax Calculator

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The St. Louis earnings tax is a flat 1% local income tax that applies to city residents and to non-residents who work inside the city limits. This calculator shows it as a separate layer on top of graduated Missouri state income tax so you can see your combined state-and-local burden.

How it works

Missouri state tax is applied across graduated marginal brackets, while the St. Louis earnings tax is a flat percentage of the same taxable income:

state_tax    = sum over brackets of (slice in bracket * bracket_rate)
earnings_tax = taxable_income * 0.01
combined     = state_tax + earnings_tax
effective    = combined / taxable_income

Each bracket only taxes the portion of income that falls within it, which is why the effective rate is lower than the top marginal rate.

Example

On $60,000 of Missouri taxable income, state tax accrues through the brackets up to the top 4.7% marginal rate, and the St. Louis earnings tax adds a flat $60,000 * 0.01 = $600. The combined figure is the sum of the two, and the effective rate is that total divided by income.

Notes

Missouri’s brackets are inflation-adjusted and the state allows a deduction tied to federal tax, so a precise return can differ from this estimate. Federal tax is separate. Use this as a planning tool and confirm specifics with the Missouri Department of Revenue or a tax professional.