Montana Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and Montana state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
MT State Tax: Progressive 4.7% - 5.9%
Quarterly Payment Amount
$6,628
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,628
Apr 1 - May 31
Due: June 15, 2026
$6,628
Jun 1 - Aug 31
Due: September 15, 2026
$6,628
Sep 1 - Dec 31
Due: January 15, 2027
$6,628
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
Montana Quarterly Tax Highlights
Montana has 2 tax brackets: 4.7% and 5.9%
No sales tax in Montana
Use Form ESA for quarterly payments
Montana Quarterly Tax FAQ
What is Montana's income tax rate?
Montana has a progressive income tax with 2 brackets: 4.7% on income up to $20,500 (single) and 5.9% on income above that.
Official References
This calculator uses current federal and Montana tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- Montana DOR
Official Montana tax authority
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.