Missouri estimated tax (quarterly) calculator

Plan quarterly payments based on Missouri tax rules.

No login required.

How this calculator works

Step 1 estimates your Missouri tax based on the taxable income you provide and the Missouri graduated brackets (0% up to $1,313, top rate above $9,191). The tool adjusts for Missouri-only income using your allocation %.

Step 2 subtracts expected withholding to determine how much is still due for the year. If the remaining tax is under $100, estimated payments are generally not required.

Step 3 divides the remaining tax into four equal payments and lists the standard due dates used by Missouri.

Frequently asked questions

When are Missouri estimated payments due?

Missouri uses the standard quarterly dates: April 15, June 15, September 15, and January 15 of the following year.

What if withholding changes later?

Recalculate with updated withholding to keep your quarterly plan accurate.

Is the safe harbor the same as federal?

Missouri generally requires estimated payments if tax due is $100 or more. Use your prior-year tax liability as a reference point.

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Estimates use Missouri’s published brackets (top rate 4.7%) and are not a substitute for official payment calculations.

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