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Mississippi Estimated Quarterly Tax

Mississippi requires estimated quarterly tax payments if you expect to owe more than $200 in state tax. The safe harbor is paying 80% of your current year tax liability. Payments are due on the same dates as federal (April 15, June 15, September 15, January 15).

Why It Matters

Self-employed workers and freelancers in Mississippi must make estimated quarterly payments for both federal and state taxes. Missing payments or underpaying can result in penalties from both the IRS and Mississippi Department of Revenue. Mississippi charges a 6.0% penalty rate on underpayments. Planning ahead helps you avoid surprises at tax time and manage cash flow throughout the year.

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How It Works

Mississippi estimated tax is calculated on your expected state taxable income for the year. File using Form 80-106 through Mississippi Department of Revenue. Payments are divided equally (25% each quarter). Due dates are 2026-04-15, 2026-06-15, 2026-09-15, and 2027-01-15.

Example

Single filer • $100,000 net SE income • 2026

Quarterly

$7,205

per quarter

Federal

$25,745

25.75%

Total Annual

$28,819

28.82%

Resources

Mississippi Estimated Tax Payments - Official Portal

Official Mississippi estimated tax payment portal administered by Mississippi Department of Revenue.

Source: Mississippi Department of Revenue

Frequently Asked Questions

How do I pay estimated taxes in Mississippi?

You can make estimated tax payments in Mississippi online through Mississippi Department of Revenue's payment portal, by mailing Form 80-106 with a check, or through electronic funds transfer. Online payment is the fastest and provides immediate confirmation.

What is the estimated tax threshold in Mississippi?

Mississippi requires estimated quarterly payments if you expect to owe more than $200 in state income tax after withholding and credits. This applies to self-employed individuals, freelancers, and anyone with significant non-wage income.

What is the penalty for underpaying estimated taxes in Mississippi?

Mississippi charges an underpayment penalty at a rate of 6.0% per year on the underpaid amount. To avoid penalties, pay at least 80% of your current year tax liability.

When are estimated tax payments due in Mississippi?

Mississippi follows the same due dates as federal estimated payments: April 15, June 15, September 15, and January 15. Payments are made using Form 80-106 through Mississippi Department of Revenue.

Key Terms

Additional Medicare Tax
An extra 0.9% tax on earned income above $200,000 (single) or $250,000 (married filing jointly).
Annualized Income Method
A calculation method allowing unequal quarterly payments for those with seasonal or irregular income.
EFTPS
Electronic Federal Tax Payment System. A free IRS online system for making federal tax payments.
Estimated Tax
Quarterly payments of expected annual tax liability made by those without sufficient withholding.
Form 1040-ES
The IRS form used to calculate and submit federal estimated tax payments.
Net Self-Employment Income
Revenue minus deductible business expenses. The starting point for self-employment tax calculation.
Safe Harbor
A threshold of estimated tax payment that, if met, protects you from underpayment penalties regardless of your actual tax liability.
Self-Employment Tax
The self-employed person's equivalent of FICA, covering both Social Security and Medicare taxes.
Social Security Wage Base
The maximum amount of earnings subject to Social Security tax ($184,500 for 2026).
Underpayment Penalty
Interest charged by the IRS when estimated tax payments are insufficient relative to your actual liability.
Employer FICA Contribution
The 7.65% of your salary that your employer pays for Social Security and Medicare — a hidden benefit contractors don't receive.

Last reviewed: 2027-07-01 • Applies to tax year: 2026