Consultants in Mississippi: taxes and retirement for 2026
For independent consultants and fractional executives billing clients directly in Mississippi. Mississippi has a flat 4% state income tax for 2026. Here are the 2026 rules, a worked example and the official sources.
Mississippi rules for consultants
- State income tax (2026)
- Mississippi has a flat 4% state income tax for 2026. For 2026, the first $10,000 of taxable income is taxed at 0% and the excess at 4% (down from 4.4% in 2025).
- State estimated tax
- You must pay estimated tax if your annual Mississippi tax liability exceeds $200 and less than 80% of it is prepaid through withholding. Same dates as federal (April 15, June 15, September 15, January 15). Form 80-106 (Individual/Fiduciary Income Tax Voucher).
- Mississippi contractor's tax
- 3.5% tax on non-residential construction contracts over $10,000; on non-residential contracts over $75,000, the tax must be paid or bonded before work starts. Residential construction (not apartments or condos) is excluded from this tax but subject to retail sales tax. Contractors need a sales tax permit before starting work.
- Unemployment worker-classification test (Miss. Code 71-5-11(J)(14))
- For state unemployment insurance, the Mississippi Department of Employment Security decides whether a worker is an employee or a contractor, not the business or the worker. It uses a multi-factor common-law test covering control, the nature of the business, who supplies tools and the workplace, how long the work lasts, the method of payment, and the worker's relationship to the firm.
- Rideshare (TNC) driver contractor status (2016 HB 1381; 19 Miss. Code R. 9-1.14)
- Rideshare drivers are independent contractors, not employees, if the company does not set required logged-in hours, does not bar them from other rideshare apps, does not assign territories, does not restrict other work, and both sides agree in writing that the driver is a contractor.
- State retirement program
- Mississippi Work and Save has been enacted. It is built around W-2 employers and does not cover 1099 contractors through the employer mandate.
Federal rules for 2026
Solo 401(k) up to $72,000
A one-person consultancy can contribute a $24,500 employee deferral plus an employer share of about 20% of net self-employment earnings, up to $72,000 in 2026, plus an $8,000 catch-up at 50 or older ($11,250 at ages 60 to 63).
The S-corp trade-off
Electing S-corp status can cut payroll tax, but the salary you pay yourself also sets your Solo 401(k) room. Run both sides before you elect.
Quarterly estimated taxes
No one withholds tax from self-employment income, so you generally pay estimates four times a year if you expect to owe $1,000 or more. For 2026 income the federal dates are April 15, June 15 and September 15, 2026, and January 15, 2027. Paying 100% of last year's tax (110% if your AGI was over $150,000) in four equal installments avoids the underpayment penalty.
Self-employment tax
On top of income tax, self-employed people pay 15.3% on 92.35% of net profit: 12.4% Social Security up to the 2026 wage base of $184,500, plus 2.9% Medicare with no cap. Half of it is deductible.
A worked example
| Self-employment tax (sole proprietor) | $21,194 |
|---|---|
| Solo 401(k) maximum | $52,381 |
| SEP IRA maximum | $27,881 |
| Payroll tax saved as an S-corp on a $75,000 salary | $9,719 |
| Solo 401(k) maximum as that S-corp | $43,250 |
Federal figures only, before state and local taxes. Simplified: excludes the QBI deduction and the 0.9% Additional Medicare Tax. Computed from 2026 IRS limits (Notice 2025-67, Rev. Proc. 2025-32) and the SSA wage base.
Free tools
Guides by job and platform
Questions
Do consultants in Mississippi pay state income tax?
Mississippi has a flat 4% state income tax for 2026. For 2026, the first $10,000 of taxable income is taxed at 0% and the excess at 4% (down from 4.4% in 2025).
When are Mississippi estimated tax payments due for 2026?
You must pay estimated tax if your annual Mississippi tax liability exceeds $200 and less than 80% of it is prepaid through withholding. Same dates as federal (April 15, June 15, September 15, January 15). The state form is 80-106 (Individual/Fiduciary Income Tax Voucher).
Are there other Mississippi taxes for self-employed consultants?
Mississippi contractor's tax: 3.5% tax on non-residential construction contracts over $10,000; on non-residential contracts over $75,000, the tax must be paid or bonded before work starts. Residential construction (not apartments or condos) is excluded from this tax but subject to retail sales tax. Contractors need a sales tax permit before starting work.
Track it in one place
Gigaverse estimates your quarterly taxes from what you actually earn, logs business trips, categorizes expenses from your bank and answers money questions with your own numbers. Retirement accounts are coming soon.
Free · Takes 10 seconds · First 1,000 in line get launch perks
On Android? Get the app on Google PlayMore in Mississippi
Sources
- www.dor.ms.gov/individual/tax-rates
- www.dor.ms.gov/sites/default/files/tax-forms/individual/80100251%202.pdf
- www.dol.gov/agencies/whd/minimum-wage/state
- www.dor.ms.gov/business/sales-use-tax/guide-construction-contractors
- mdes.ms.gov/employers/unemployment-tax/reporting-and-filing/worker-classification/
- www.law.cornell.edu/regulations/mississippi/19-Miss-Code-R-SS-9-1-14
State and local facts researched from official sources and independently re-checked; last verified October 2026, next scheduled review 2027-01-02. Educational information for 2026, not tax, legal or investment advice. Rules change; check the official sources listed and a tax professional for your situation. Gigaverse AI, Inc. is a financial technology company, not a bank, and not itself a registered investment adviser or broker-dealer.