StructureCost2026

LLC or S corp for a plumber in Mississippi (2026)

A plumber in Mississippi with $70,000 of profit pays $16,213 a year in tax and fees as a sole proprietor and $16,486 as an LLC taxed as an S corp, with a $49,000 salary. The S corp starts to pay at about $282,500 of profit.

More settings revenue, salary, filing status, payroll costs, PTET

+$273 a year

more for an LLC taxed as an S corp than a sole proprietorship in Mississippi, at these numbers.

Switching from a sole proprietorship to an LLC taxed as an S corp starts to pay at about $282,500 of profit, with the same settings. Setting up costs $50 once in state filing fees. As an LLC taxed as an S corp this uses the state's pass-through entity tax election, which lowers the cost here.

Mississippi, 2026: $70,000 profit, single filer

ItemSole propLLC as S corpChange
Self-employment taxirs.gov, 2026 rates$9,891$0−$9,891
Federal income taxirs.gov, 2026 rates$4,452$5,117+$665
State income tax, after the PTET creditdor.ms.gov, checked Oct 23, 2026$1,870$1,376−$494
Payroll tax on your salaryirs.gov, 2026 rates$0$7,707+$7,707
Payroll service and tax return (estimate)$0$1,800+$1,800
Mississippi corporate franchise taxdor.ms.gov, checked Oct 23, 2026$0$25+$25
Mississippi pass-through entity tax, paid by the company (elected)dor.ms.gov, checked Oct 23, 2026$0$461+$461
Yearly cost$16,213$16,486+$273
What these figures count
  • State income tax, and state taxes on the business itself: franchise, LLC, S corp, gross receipts and excise taxes.
  • Social Security and Medicare on both sides of an owner salary, federal unemployment tax and the state's new-employer rate.
  • The 20% qualified business income deduction with its income limits and the professional-service rule.
  • Yearly report fees, and a cost you can change for payroll and the business tax return.

Many S corp calculators leave out state taxes and the QBI deduction, which can make the election look better than it is.

At three profit levels

ProfitSalary usedSole propLLCLLC as S corpC corp
$50,000$35,000$10,859$10,859$11,456$12,888
$70,000$49,000$16,213$16,213$16,486$18,649
$100,000$64,000$25,350$25,350$24,980$30,264

Salary is the BLS median for the job ($63,800), capped at 70% of profit. Revenue 5.3 times profit. Single filer.

What matters for plumbers

What the switch takes in Mississippi

  1. File the Certificate of Formation (Form F0100) with the state: $50 (fee).
  2. Get an EIN from the IRS (free, online) and open a business bank account in the new name.
  3. Check the business can elect: no more than 100 shareholders, all of them US citizens or residents (no nonresident alien owners), and one class of stock. IRS
  4. File IRS Form 2553 to elect S corp tax treatment, within 2 months and 15 days of the start of the tax year it should apply to. See how the S corp election works.
  5. Register with Mississippi as an employer and run payroll for your own salary: federal Forms 941 each quarter, Form 940 and a W-2 each year. New employers pay Mississippi unemployment tax at 1% on the first $14,000 of wages. mdes.ms.gov See what payroll costs.
  6. Federal return each year: Form 1120-S, due March 15, plus your own Form 1040.
  7. State upkeep each year: LLC Annual Report (Form F0108), no fee, due April 15. New for you: Mississippi corporate franchise tax.

Questions

Should a plumber in Mississippi form an S corp?

At $70,000 of profit, not on these figures: the S corp costs $273 a year more than staying a sole proprietor.

Is an LLC worth it for a plumber in Mississippi?

For tax, a single-member LLC changes nothing: $16,213 a year against $16,213, the difference being Mississippi's LLC fees. It separates business liability and is the base for an S corp election.

More

Other professions in Mississippi
Other states