Utah estimated tax (quarterly) calculator
Plan quarterly payments based on Utah tax rules.
How this calculator works
Step 1 estimates your Utah tax based on the taxable income you provide and the Utah flat rate. The tool adjusts for Utah-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 $500, estimated payments are generally not required.
Step 3 divides the remaining tax into four equal payments and lists the standard due dates used by Utah.
Frequently asked questions
When are Utah estimated payments due?
Utah 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?
Utah generally requires estimated payments if tax due is $500 or more. Use your prior-year tax liability as a reference point.
Estimates use Utah’s flat tax rate and are not a substitute for official payment calculations.