StructureCost2026

LLC or S corp for a physical therapist in Colorado (2026)

A physical therapist in Colorado with $110,000 of profit pays $29,204 a year in tax and fees as a sole proprietor and $31,137 as an LLC taxed as an S corp, with a $77,000 salary. The S corp starts to pay at about $287,500 of profit.

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

+$1,933 a year

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

Switching from a sole proprietorship to an LLC taxed as an S corp starts to pay at about $287,500 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.

Colorado, 2026: $110,000 profit, single filer

ItemSole propLLC as S corpChange
Self-employment taxirs.gov, 2026 rates$15,543$0−$15,543
Federal income taxirs.gov, 2026 rates$9,871$12,143+$2,272
State income tax, after the PTET credittax.colorado.gov, checked Oct 24, 2026$3,790$2,680−$1,110
Periodic Reportsos.state.co.us, checked Oct 24, 2026$0$25+$25
Payroll tax on your salaryirs.gov, 2026 rates$0$13,095+$13,095
State disability and paid leavefamli.colorado.gov, checked Oct 24, 2026$0$339+$339
Payroll service and tax return (estimate)$0$1,800+$1,800
Colorado pass-through entity tax, paid by the company (elected)tax.colorado.gov, checked Oct 24, 2026$0$1,055+$1,055
Yearly cost$29,204$31,137+$1,933
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
$80,000$56,000$19,211$19,229$20,645$23,368
$110,000$77,000$29,204$29,220$31,137$35,550
$160,000$103,000$46,498$46,514$47,181$55,187

Salary is the BLS median for the job ($102,760), capped at 70% of profit. Revenue 2.4 times profit. Single filer.

What matters for physical therapists

What the switch takes in Colorado

  1. File the Articles of Organization 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 Colorado 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 Colorado unemployment tax at 3.05% on the first $30,600 of wages. cdle.colorado.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: Periodic Report, $25 a year, due within two months before or after the anniversary month of formation.

Questions

Should a physical therapist in Colorado form an S corp?

At $110,000 of profit, not on these figures: the S corp costs $1,933 a year more than staying a sole proprietor.

Is an LLC worth it for a physical therapist in Colorado?

For tax, a single-member LLC changes nothing: $29,220 a year against $29,204, the difference being Colorado's LLC fees. It separates business liability and is the base for an S corp election.

More

Other professions in Colorado
Other states