State tax guide
Every self-employed person in Mississippi pays the same 15.3% federal self-employment tax. But Mississippi also has a state income tax of 4%, which adds to your total tax burden. Here's what MS freelancers and 1099 contractors need to know.
Mississippi has a flat 4% state income tax rate for 2026 (phased in from previous 4.7%). One of the simplest and lowest tax structures in the country.
State Income Tax
4%
Federal SE Tax
15.3%
Tax Agency
Mississippi Department of Revenue
Flat 4%; trending downward
The federal self-employment tax rate is 15.3% on 92.35% of your net self-employment earnings. This breaks down to 12.4% for Social Security (up to the combined $184,500 wage base in 2026) and 2.9% for Medicare without that cap. Additional Medicare Tax may also apply. On top of that, Mississippi charges its own income tax of 4% on your taxable income.
SE Tax Formula
SE Taxable Income = Net earnings × 92.35%
SE Tax = SE Taxable Income × 15.3%
MS State Tax = Net earnings × State rate
Estimate your self-employment tax, income tax, and take-home pay. Enter your numbers below — results update instantly.
This simple estimator does not collect filing status or W-2 wages. Its Social Security estimate cannot combine a W-2 wage base, and it does not include Additional Medicare Tax.
Planning estimate only. Does not include city/county taxes, withholding, safe-harbor rules, uneven income, Additional Medicare Tax, deductions for half of SE tax, QBI deduction, or tax credits. The quarterly figure is a rough reserve, not a payment instruction. Consult a CPA or EA.
MS self-employed individuals must make quarterly estimated tax payments if they expect to owe $1,000 or more. This applies to both federal and Mississippi state taxes. The IRS and most states accept online payments.
Safe Harbor rule: pay 100% of last year's tax (110% if AGI over $150K) or 90% of this year's tax, and you avoid underpayment penalties.
Whether you live in MS or anywhere in the US, these deductions can significantly lower your tax bill:
You can deduct 50% of your self-employment tax as an above-the-line adjustment on your federal return.
Deduct a portion of rent, utilities, and internet if you use part of your home exclusively and regularly for business.
Self-employed health insurance premiums are 100% deductible on your federal return.
SEP IRA (up to 25% of net earnings) or Solo 401(k) contributions reduce your taxable income.
Thinking about going from W-2 to 1099 in Mississippi? With a 4% state tax rate, your breakeven 1099 rate needs to be higher than in no-tax states. Use our calculator to run the numbers.
Compare W-2 vs 1099 →The federal self-employment tax rate is 15.3% everywhere in the US. Mississippi adds a state income tax of 4% on top of that. Your total tax rate depends on your income level and federal tax bracket.
You pay both federal and Mississippi state estimated taxes quarterly using IRS Form 1040-ES and Mississippi Department of Revenue estimated payment forms. Use our quarterly tax calculator to estimate your payment amounts. Visit Mississippi Department of Revenue for state-specific instructions: https://www.dor.ms.gov/
Yes, if you expect to owe $1,000 or more in federal tax. Mississippi similarly requires estimated payments if you expect to owe state tax of $500 or more (thresholds vary by state).
Home office, health insurance premiums, retirement contributions (SEP IRA or Solo 401k), equipment and software, mileage, professional services, and 50% of your SE tax itself are all deductible. Track expenses year-round — don't wait until tax season.