StructureCost2026

LLC or S corp for a dentist in New Hampshire (2026)

A dentist in New Hampshire with $190,000 of profit pays $56,123 a year in tax and fees as a sole proprietor and $54,467 as an LLC taxed as an S corp, with a $133,000 salary. The S corp starts to pay at about $132,500 of profit.

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

$1,656 a year

saved by switching from a sole proprietorship to an LLC taxed as an S corp in New Hampshire, at these numbers.

Switching from a sole proprietorship to an LLC taxed as an S corp starts to pay at about $132,500 of profit, with the same settings. Setting up costs $100 once in state filing fees.

New Hampshire, 2026: $190,000 profit, single filer

ItemSole propLLC as S corpChange
New Hampshire business profits tax (sole proprietors and LLCs)revenue.nh.gov, checked Oct 23, 2026$8,625$0−$8,625
Self-employment taxirs.gov, 2026 rates$25,627$0−$25,627
Federal income taxirs.gov, 2026 rates$21,871$28,582+$6,711
Annual Reportquickstart.sos.nh.gov, checked Oct 23, 2026$0$100+$100
Payroll tax on your salaryirs.gov, 2026 rates$0$20,629+$20,629
Payroll service and tax return (estimate)$0$1,800+$1,800
New Hampshire business profits tax (S corporations and LLCs taxed as S corps)revenue.nh.gov, checked Oct 23, 2026$0$3,356+$3,356
Yearly cost$56,123$54,467−$1,656
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
$130,000$91,000$34,378$34,447$34,400$38,729
$190,000$133,000$56,123$56,191$54,467$60,222
$270,000$171,000$85,502$85,555$82,505$91,184

Salary is the BLS median for the job ($170,950), capped at 70% of profit. Revenue 3.5 times profit. Single filer.

What matters for dentists

What the switch takes in New Hampshire

  1. File the Certificate of Formation (Form LLC-1) with the state: $100 (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. New Hampshire does not follow the S election: the state taxes the company as a corporation, which the figures above include.
  6. Register with New Hampshire 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 New Hampshire unemployment tax at 1.7% on the first $14,000 of wages. nhes.nh.gov See what payroll costs.
  7. Federal return each year: Form 1120-S, due March 15, plus your own Form 1040.
  8. State upkeep each year: Annual Report, $100 a year, due April 1. New for you: New Hampshire business profits tax (S corporations and LLCs taxed as S corps).

Questions

Should a dentist in New Hampshire form an S corp?

At $190,000 of profit, yes on these figures: an LLC taxed as an S corp costs $54,467 a year against $56,123 as a sole proprietor, $1,656 less.

Is an LLC worth it for a dentist in New Hampshire?

For tax, a single-member LLC changes nothing: $56,191 a year against $56,123, the difference being New Hampshire's LLC fees. It separates business liability and is the base for an S corp election.

More

Other professions in New Hampshire
Other states