Indiana Quarterly Tax Calculator 2026
Rates reviewed · Indiana Department of Revenue
Indiana has a flat 3.05% income tax rate. County-level income taxes may also apply. Quarterly payments required if annual liability exceeds $1,000.
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Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.
Indiana quarterly tax questions
How much is the quarterly tax for freelancers in Indiana?
Freelancers in Indiana pay federal self-employment tax (15.3% of net self-employment income), federal income tax at their bracket, and Indiana income tax of 3.05% flat. This calculator applies 3.05% as a representative Indiana rate for freelancer-level income; the top marginal rate is 3.05% flat.
When are quarterly estimated taxes due in Indiana for 2026?
Indiana follows the federal estimated tax schedule for 2026 — Q1: April 15, 2026, Q2: June 16, 2026, Q3: September 15, 2026, Q4: January 15, 2027. The Q3 payment is due September 15, 2026.
Do I have to make Indiana estimated tax payments?
Indiana requires estimated payments once you expect to owe $1,000 or more in state income tax for the year. The state form is Form ES-40. Payments can be made online through INTIME. Filing and paying federal estimated tax does not cover the state amount — they are separate payments.
Where do I pay Indiana estimated taxes online?
Indiana accepts online estimated tax payments through INTIME, run by the Indiana Department of Revenue. Federal payments go through IRS Direct Pay or EFTPS separately.
What happens if I underpay estimated taxes in Indiana?
The IRS charges an underpayment penalty based on the amount underpaid and the number of days late. Paying at least 90% of this year's tax or 100% of last year's (110% if your AGI exceeded $150,000) meets the federal safe harbour. Indiana applies its own interest and penalty on late or short state payments.
State payments are administered by the Indiana Department of Revenue via INTIME.
Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.