When should a physician elect S-Corp status?

The general rule of thumb is when your net self-employment income consistently exceeds $80,000-$100,000 per year after business expenses. At that level, the payroll tax savings from the S-Corp election (avoiding the 15.3% self-employment tax on distributions) typically outweigh the additional costs of payroll processing, tax preparation, and compliance. For most 1099 physicians — especially locum tenens and private practice owners — you will cross this threshold quickly.

What is reasonable compensation for a physician S-Corp?

Reasonable compensation is the salary you must pay yourself as an S-Corp shareholder-employee. The IRS requires it to reflect what you would earn performing similar services for an unrelated employer. For physicians, the IRS looks at BLS data, MGMA compensation surveys, and specialty-specific benchmarks. A primary care physician might defend $180,000-$220,000; a surgeon might need $300,000-$400,000+. Setting salary too low (e.g., $80,000 for a full-time surgeon) is one of the top S-Corp audit triggers.

How much can a physician save with an S-Corp election?

Savings depend on your net income, specialty, and reasonable compensation amount. A locum tenens physician netting $350,000 who sets a reasonable salary of $180,000 would save approximately $15,300 in self-employment taxes (15.3% on the $170,000 in distributions that avoids SE tax), minus the employer portion of FICA on the salary side. After accounting for payroll costs ($2,000-$4,000/year), net savings typically range from $10,000 to $30,000+ per year depending on income level.

What is the deadline to elect S-Corp status?

For an existing LLC or C-Corp, you must file Form 2553 by March 15 of the tax year you want S-Corp treatment to begin. For a new entity, you have 75 days from formation. If you miss the March 15 deadline, you can file a late election with reasonable cause under Rev. Proc. 2013-30 — the IRS is relatively lenient on late S-Corp elections if you can show you intended to be an S-Corp from the start and have been operating as one.

Can a W-2 physician benefit from S-Corp election?

Not on W-2 income. The S-Corp election only applies to business income. However, if you have 1099 side income — locum tenens, consulting, expert witness, telemedicine, speaking fees — you can run that through an S-Corp to save on self-employment taxes. Many employed physicians earn $50,000-$200,000+ in side income that benefits from S-Corp treatment.

S-Corp vs LLC: which is better for physicians?

An LLC is a legal structure; S-Corp is a tax election. You can have an LLC taxed as an S-Corp — and for most physicians, this is the optimal setup. The LLC provides liability protection, and the S-Corp tax election provides payroll tax savings on distributions. A standalone LLC (taxed as a sole proprietorship or partnership) means all net income is subject to self-employment tax. A standalone S-Corp (incorporated as a corporation) works but lacks the flexibility of an LLC.

What payroll costs should I expect with an S-Corp?

Plan for $2,000-$4,000 per year for payroll processing, which includes payroll software or service (ADP or similar), quarterly payroll tax filings (Forms 941), annual W-2 issuance, state unemployment insurance (SUI), and workers' compensation if required by your state. Your CPA or payroll provider handles the filings. This cost is easily recouped when S-Corp savings exceed $10,000+.

How does S-Corp election affect the QBI deduction?

The S-Corp salary (W-2 wages) does NOT count as qualified business income — only the distributions (pass-through profit) qualify for the 23% QBI deduction. This creates a tradeoff: lowering salary increases both SE tax savings and QBI, but the IRS requires reasonable compensation. For physicians in the SSTB phase-out range, optimizing this split can add $5,000-$15,000+ in QBI tax savings on top of SE tax savings.

What are the biggest S-Corp mistakes physicians make?

The top mistakes are: (1) Setting salary unreasonably low — the IRS specifically targets physician S-Corps with below-market salaries. (2) Not running payroll at all — taking only distributions without a salary is a red flag. (3) Missing payroll tax deadlines and accumulating penalties. (4) Filing the S-Corp election late and missing the March 15 deadline. (5) Not making quarterly estimated tax payments on the distribution income. (6) Commingling personal and business finances.

Can I have multiple S-Corps as a physician?

Yes. Many physicians operate multiple entities — for example, one S-Corp for clinical income and a separate LLC (or S-Corp) for consulting, coaching, or real estate management. This can be advantageous for QBI planning (separating SSTB and non-SSTB income) and liability protection. However, each S-Corp requires its own payroll, tax return, and compliance — increasing administrative costs.

What happens if the IRS challenges my reasonable compensation?

If the IRS determines your salary was unreasonably low, they can reclassify distributions as wages — triggering back payroll taxes (Social Security, Medicare, FUTA), plus penalties and interest. In the worst case, the IRS applies the additional 20% accuracy-related penalty. To defend against this, document your salary basis using BLS data, MGMA surveys, hours worked, and the nature of services performed. Having a CPA document the reasonable compensation analysis is your best defense.

Do I need a separate bank account for my S-Corp?

Absolutely. The S-Corp must maintain a separate business bank account. All business income flows into the business account, payroll is run from the business account, business expenses are paid from the business account, and distributions are transferred to your personal account. Commingling funds is one of the fastest ways to lose your liability protection (piercing the corporate veil) and raise IRS red flags.

S-Corp

Physician Tax Strategy

The S-Corp Election for Physicians:
The Definitive Guide

The single most impactful tax election for 1099 physicians. Save $10,000-$30,000+ per year in self-employment taxes — when done right.

25 min read Updated March 2026 By Bryan Martin, CPA

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When to Elect S-Corp as a Physician

Income Thresholds and Decision Criteria

The S-Corp election allows your LLC or corporation to be taxed under Subchapter S of the Internal Revenue Code. Instead of paying 15.3% self-employment tax on all net business income (as a sole proprietor or single-member LLC), you pay yourself a reasonable salary (subject to payroll taxes) and take the remaining profit as distributions — which are exempt from Social Security and Medicare taxes.

For a physician netting $300,000 through a pass-through entity, the difference between sole proprietorship and S-Corp taxation can be $15,000-$25,000+ per year in payroll tax savings alone. But the election only makes sense when the savings outweigh the costs — payroll processing, additional tax return preparation, and compliance burden.

$80K+

Net income threshold where S-Corp typically makes sense

15.3%

Self-employment tax rate avoided on distributions

March 15

Annual deadline to file Form 2553

Most 1099 physicians easily clear the $80,000 threshold. If you are earning $150,000+ as a locum tenens, independent contractor, or private practice owner, the S-Corp election is almost certainly beneficial. The real question is not whether to elect — it is how to set the right salary.

S-Corp Decision Checklist for Physicians

Net self-employment income exceeds $80,000-$100,000 consistently
You receive 1099 income (locums, consulting, private practice, expert witness)
You are willing to run payroll (W-2 to yourself) monthly or semi-monthly
You can maintain a separate business bank account
You have a CPA or payroll provider to handle quarterly filings
You expect this income level to continue for multiple years
Your state does not impose a punitive S-Corp franchise tax (check CA, NYC, TX)

State-Specific Considerations

Some states impose additional taxes on S-Corps. California charges a 1.5% net income tax (minimum $800/year). New York City imposes a General Corporation Tax on S-Corps. Texas has a franchise tax. These state-level costs reduce your net savings and must be factored into the analysis. In most cases the federal savings still dominate, but run the numbers for your state.

Reasonable Compensation by Specialty

The Most Critical (and Audited) Part of S-Corp Planning

The IRS requires that S-Corp shareholder-employees receive reasonable compensation for services performed. This is the single most scrutinized aspect of physician S-Corps. Set your salary too low and you face reclassification of distributions as wages — plus penalties, back taxes, and interest.

"Reasonable compensation" is not a fixed number. The IRS evaluates it based on the nature of services, hours worked, comparable salaries in the market, and the economic conditions of the practice. For a full-time physician, the salary must reflect what you would earn performing similar services for an unrelated employer.

Reasonable Salary Ranges by Physician Specialty

Specialty	BLS / MGMA Median	Defensible S-Corp Salary Range	Notes
Primary Care / Family Medicine	$260,000	$160,000 - $220,000	Lower end if part-time or limited scope
Internal Medicine	$278,000	$170,000 - $230,000	Adjust for subspecialty focus
Psychiatry	$306,000	$180,000 - $250,000	Telemedicine may justify lower end
Emergency Medicine	$350,000	$200,000 - $280,000	Shift-based; adjust for hours
Anesthesiology	$420,000	$250,000 - $340,000	High market rate constrains salary floor
General Surgery	$450,000	$280,000 - $370,000	Procedure volume matters
Orthopedic Surgery	$560,000	$320,000 - $420,000	High BLS median limits savings
Cardiology	$550,000	$310,000 - $410,000	Interventional vs non-interventional
Dermatology	$475,000	$280,000 - $380,000	Cosmetic vs medical dermatology
Radiology	$440,000	$260,000 - $350,000	Teleradiology may justify lower salary

Pro Tip

The salary does not need to match the BLS median exactly. If you work fewer hours, have a narrower scope of practice, or practice in a lower-cost region, you can justify a salary below the median. The key is documentation: maintain a written reasonable compensation analysis that references BLS data, MGMA surveys, hours worked, and the specific services you perform. We prepare these analyses for every S-Corp client.

Factors the IRS Considers for Reasonable Compensation

Comparable Salaries

BLS, MGMA, and industry surveys for your specialty and geographic area

Hours Worked

Part-time physicians can justify lower salaries than full-time equivalents

Nature of Services

Administrative-only roles warrant lower salaries than clinical duties

Revenue Generated

Your salary should be proportionate to the revenue you produce for the S-Corp

Geographic Location

Cost of living and regional compensation data for your area

Training & Experience

Board certification, fellowship training, and years of experience

S-Corp vs LLC vs Sole Prop: Tax Math

Side-by-Side Comparison at Different Income Levels

Let's compare the total tax burden across three entity structures for a physician with identical net business income. The comparison focuses on self-employment / payroll taxes — the area where entity structure creates the biggest difference.

Scenario: Locum Tenens Physician, $300,000 Net Income, Single Filer

Tax Component	Sole Proprietorship	LLC (Disregarded)	LLC Taxed as S-Corp
Net Business Income	$300,000	$300,000	$300,000
Reasonable Salary (W-2)	N/A	N/A	$180,000
Distributions	N/A	N/A	$120,000
Social Security Tax (12.4%)	$20,905*	$20,905*	$22,320**
Medicare Tax (2.9%)	$8,035	$8,035	$5,220
Additional Medicare (0.9%)	$770	$770	$0***
Total SE / Payroll Tax	$29,710	$29,710	$27,540
Payroll Processing Cost	$0	$0	$3,000
Additional Tax Return Cost	$0	$0	$1,500
Net Payroll Tax Burden	$29,710	$29,710	$32,040

* Capped at SS wage base ($184,500 for 2026). ** On salary only. *** Salary below $200K threshold. At $300K with $180K salary, savings are modest because SS wage base is already exceeded under sole prop. See higher income scenarios below.

Scenario: Physician, $500,000 Net Income, MFJ

Tax Component	Sole Proprietorship	LLC Taxed as S-Corp
Net Business Income	$500,000	$500,000
Reasonable Salary	N/A (all subject to SE)	$250,000
Distributions	N/A	$250,000
Social Security Tax (12.4%)	$20,905	$20,905*
Medicare Tax (2.9%)	$13,391	$7,250
Additional Medicare (0.9%)	$2,157	$450
Total SE / Payroll Tax	$36,453	$28,605
Payroll & Tax Return Costs	$0	$4,500
Net Tax Burden	$36,453	$33,105
Annual Savings	—	$3,348

* SS tax maxes out on salary at wage base. The real savings come from Medicare tax on the distribution amount.

The S-Corp savings increase as income rises above the Social Security wage base. At $500,000+, the savings are primarily from Medicare tax (2.9% + 0.9% additional) on the distribution amount. For a physician netting $500,000 with a $250,000 salary, that is approximately $9,500 in Medicare tax savings on $250,000 in distributions, minus $4,500 in additional costs = $5,000+ net savings per year. At higher income levels, savings grow proportionally.

S-Corp Savings Estimator

Net Business Income

Reasonable S-Corp Salary

SE Tax (Sole Prop)

$33,361

Payroll Tax (S-Corp)

$27,540

Gross Tax Savings

$5,821

Net Savings (After Costs)

$2,821

This is a simplified estimator. Actual savings depend on state taxes, FUTA, workers' comp, and other factors. Book a call for a precise analysis.

Step-by-Step S-Corp Election Process

Form 2553 Filing, Deadlines, and Late Election Relief

Electing S-Corp status requires filing IRS Form 2553 (Election by a Small Business Corporation). The process is straightforward but the deadlines are strict — and missing them can delay your election by an entire year.

Form Your Entity (If Needed)

If you do not already have an LLC or corporation, form one in your state. Most physicians choose a single-member LLC for simplicity and flexibility. Obtain an EIN from the IRS (free, online, takes 5 minutes).

File Form 2553 with the IRS

Complete IRS Form 2553 and submit it by mail or fax. The form requires your entity name, EIN, shareholder information, and the tax year you want S-Corp treatment to begin. All shareholders must sign.

Meet the March 15 Deadline

For an existing entity, Form 2553 must be filed by March 15 of the tax year you want S-Corp status to begin. For a new entity, you have 75 days from formation. Example: to be taxed as an S-Corp for 2026, file by March 15, 2026.

Receive IRS Acceptance Letter

The IRS processes Form 2553 in 4-8 weeks and sends an acceptance letter (CP261). Keep this letter permanently — it confirms your S-Corp election is in effect.

Set Up Payroll

Once your S-Corp election is accepted, set up payroll immediately. You must pay yourself a W-2 salary through a payroll system (ADP, Paychex, or similar). Payroll must run at least monthly — ideally semi-monthly or bi-weekly.

Open a Business Bank Account

Maintain a separate business bank account. All business income deposits into this account, payroll is run from this account, and owner distributions are transferred to your personal account.

File Quarterly Payroll Returns

File Form 941 (employer's quarterly tax return) every quarter. Your payroll provider typically handles this automatically. You also need to make quarterly estimated tax payments on your distribution income.

Missed the March 15 Deadline?

If you missed the March 15 deadline, you may still be able to elect S-Corp status retroactively under Rev. Proc. 2013-30. The IRS allows late elections if you can demonstrate reasonable cause — typically meaning you intended to be an S-Corp, operated as one (paying salary, maintaining separate books), and simply failed to file the form on time. Your CPA files Form 2553 with a reasonable cause statement attached. The IRS approves the majority of these late elections. See our S-Corp election resource guide for the complete late election process.

Key Deadlines at a Glance

Deadline	What	Form / Action
March 15	S-Corp election for current tax year	Form 2553
75 days from formation	S-Corp election for newly formed entity	Form 2553
Monthly / Semi-monthly	Pay yourself W-2 salary via payroll	Payroll system
April 15, June 15, Sept 15, Jan 15	Quarterly estimated tax payments	Form 1040-ES
April 30, July 31, Oct 31, Jan 31	Quarterly payroll tax returns	Form 941
January 31	Issue W-2 to yourself	Form W-2
March 15	File S-Corp tax return	Form 1120-S

Want Us to Model Your S-Corp Savings?

We'll run the S-Corp math for your specific income, specialty, and filing status — including reasonable compensation analysis and QBI tradeoff — and show you exactly how much you can save.

Book a Free S-Corp Strategy Call

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Payroll Setup Requirements & Costs

What You Need to Run Payroll as a Physician S-Corp

Running payroll is the non-negotiable requirement of S-Corp taxation. You must pay yourself a W-2 salary through a legitimate payroll system — not just write yourself a check and call it wages. The payroll system handles tax withholding, quarterly filings, W-2 issuance, and tax deposits.

Annual S-Corp Compliance Costs

Cost Category	Estimated Annual Cost	Notes
Payroll Processing (ADP, etc.)	$500 - $1,500	Depends on provider and pay frequency
S-Corp Tax Return (Form 1120-S)	$1,000 - $2,500	CPA preparation; more complex than Schedule C
Quarterly Payroll Filings (Form 941)	Included in payroll	Handled by payroll provider
State Unemployment Insurance (SUI)	$200 - $500	Varies by state; minimal for single-employee S-Corp
Workers' Compensation	$0 - $500	Not required in all states for owner-only S-Corp
Registered Agent (if required)	$100 - $300	Annual fee for LLC/Corp registered agent
Total Annual Compliance Cost	$2,000 - $4,500	Easily recouped with S-Corp savings of $10K+

Pro Tip

For a single-owner physician S-Corp, we recommend ADP for payroll — it handles all federal and state filings automatically, issues W-2s, and costs approximately $40-$80/month. The setup takes about 30 minutes. Your CPA can also run payroll through their practice management system. The key is consistency: run payroll on a regular schedule (semi-monthly is most common) and never skip a pay period.

Payroll Setup Checklist

Choose a payroll provider (ADP, Paychex, or CPA-managed payroll)
Register for state employer tax accounts (withholding, unemployment)
Set pay frequency (semi-monthly recommended for physician S-Corps)
Configure salary amount based on reasonable compensation analysis
Set up direct deposit from business account to personal account
Configure federal and state tax withholding (use IRS W-4 calculator)
Verify payroll provider handles quarterly Form 941 filings
Set calendar reminders for quarterly estimated tax payments on distributions

QBI Deduction Interaction

How S-Corp Salary Affects Your Section 199A Deduction

The S-Corp election and QBI deduction are deeply intertwined — and the interaction is more nuanced than most guides suggest. Your W-2 salary from the S-Corp does not count as qualified business income. Only the pass-through distributions qualify for the 23% QBI deduction under Section 199A.

This means every dollar you pay yourself in salary reduces your QBI. But remember — physician income is classified as a Specified Service Trade or Business (SSTB), which means the QBI deduction phases out at higher income levels ($191,950 single / $383,900 MFJ for 2026).

Income Zone (MFJ)	S-Corp Strategy	QBI Impact
Below $383,900	Set salary at defensible minimum to maximize both SE savings and QBI	Full 23% QBI on distributions
$383,900 - $483,900 (phase-out)	Model exact tradeoff between salary, SE tax, and partial QBI	Partial QBI — every dollar of salary reduces it
Above $483,900	Focus purely on SE tax savings; QBI is zero on medical income	No QBI deduction available on SSTB income

For physicians inside the SSTB phase-out range, optimizing the S-Corp salary for QBI can add $5,000-$15,000+ in additional tax savings on top of SE tax savings. This requires modeling both effects simultaneously — which is exactly what we do in our strategy calls. For a deep dive on QBI mechanics, read our QBI deduction guide for physicians.

The W-2 Wage Limitation

For S-Corp owners in or above the SSTB phase-out range, the QBI deduction is also capped by the W-2 wage limitation: the deduction cannot exceed the greater of (a) 50% of W-2 wages paid by the business, or (b) 25% of W-2 wages plus 2.5% of qualified property basis. Setting your S-Corp salary too low can inadvertently cap QBI below the 23% amount. This is another reason salary optimization requires careful modeling.

Case Study: Locum Tenens Physician Saving $25K+

Real-World S-Corp Implementation

Dr. Sarah Nguyen — Emergency Medicine, Locum Tenens

Single filer. 100% 1099 income. Working locum shifts across three states. Net income: $420,000.

Before: Schedule C (Sole Proprietorship)

Item	Amount
Gross 1099 Income	$480,000
Business Deductions (travel, CME, insurance, etc.)	($60,000)
Net Schedule C Income	$420,000
Self-Employment Tax (15.3% on 92.35%)	$36,453
Income Tax (federal, estimated)	$98,000
Total Federal Tax Burden	$134,453

After: LLC Taxed as S-Corp

Item	Amount
Net Business Income	$420,000
Reasonable Salary (W-2)	$220,000
S-Corp Distributions	$200,000
Payroll Taxes on Salary	$27,890
SE Tax on Distributions	$0
Solo 401(k) Contribution (employee + employer)	$72,000
Taxable Income After Retirement	$351,000
QBI Deduction (23% of $200K, partial SSTB factor)	$0*
Income Tax (federal, estimated)	$78,500
Total Federal Tax Burden	$106,390
Payroll Processing & Tax Return Costs	$4,000
Total Cost with S-Corp	$110,390

* At $351K single, Dr. Nguyen is above the $241,950 SSTB ceiling, so QBI is fully phased out on medical income.

Total Annual Tax Savings

$24,063

S-Corp payroll tax savings + retirement plan tax savings - additional compliance costs

Key Takeaways from Dr. Nguyen's Case:

S-Corp payroll tax savings alone: ~$8,500/year after costs
Solo 401(k) retirement savings: $72,000 tax-deferred — only possible with S-Corp payroll
The retirement contribution reduced taxable income by $72,000 at the 35-37% bracket
Multi-state filing required for locum work — S-Corp simplifies nexus reporting
Total 5-year savings projection: $120,000+ in reduced taxes

Pro Tip

Dr. Nguyen's biggest savings came from the combination of S-Corp election and retirement plan contributions. The S-Corp payroll enables the Solo 401(k) employer contribution (25% of salary), which would not be available without W-2 wages. This is why we always model S-Corp, QBI, and retirement planning together — they are interconnected strategies, not standalone elections.

Common S-Corp Mistakes Physicians Make

Avoid These Costly Errors

Mistake #1: Setting salary unreasonably low

This is the #1 audit trigger for physician S-Corps. Paying yourself $60,000 when BLS data shows your specialty's median is $350,000 is indefensible. The IRS can reclassify distributions as wages, impose back payroll taxes, penalties (up to 100% of unpaid trust fund taxes), and interest. Always base salary on documented reasonable compensation analysis.

Mistake #2: Not running payroll at all

Some physicians elect S-Corp status but then take all income as distributions without paying any salary. This is a red flag the IRS actively screens for. Every S-Corp shareholder-employee who performs services must receive W-2 compensation. Zero salary = guaranteed reclassification.

Mistake #3: Missing the March 15 Form 2553 deadline

If you intend to be taxed as an S-Corp for the current year, Form 2553 must be filed by March 15. Missing this deadline means your election does not take effect until the following year — costing you an entire year of savings. Late election relief exists under Rev. Proc. 2013-30, but it requires a reasonable cause statement.

Mistake #4: Commingling personal and business funds

Running personal expenses through the S-Corp bank account, or depositing business income into personal accounts, undermines the corporate veil. This can result in loss of liability protection and IRS scrutiny of the entire S-Corp arrangement. Maintain strict separation.

Mistake #5: Forgetting quarterly estimated tax payments

S-Corp distributions are not subject to payroll withholding — you must make quarterly estimated tax payments on this income. Missing estimated payments results in underpayment penalties (currently ~8% annualized). Set up automatic quarterly payments to the IRS and your state.

Mistake #6: Ignoring the QBI deduction tradeoff

Setting your S-Corp salary without considering the QBI deduction impact can leave money on the table. For physicians in the SSTB phase-out range, optimizing the salary-distribution split for both SE tax and QBI can save an additional $5,000-$15,000 per year. Read our QBI deduction guide for the complete analysis.

Mistake #7: Not maintaining corporate formalities

Even a single-member LLC taxed as an S-Corp should maintain basic formalities: an operating agreement, annual meeting minutes (even if brief), a separate bank account, and clear documentation of salary and distribution decisions. Failing to maintain these can jeopardize liability protection.

Mistake #8: Electing S-Corp when income is too low

If your net business income is below $60,000-$80,000, the S-Corp compliance costs ($2,000-$4,500/year) may exceed the payroll tax savings. Run the numbers before electing. For low 1099 side income, a Schedule C sole proprietorship may actually be more cost-effective.

Want Us to Model Your S-Corp Savings?

We'll run the S-Corp math for your specific income, specialty, and filing status — including reasonable compensation analysis and QBI tradeoff — and show you exactly how much you can save.

Book a Free S-Corp Strategy Call

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Frequently Asked Questions

S-Corp Election for Physicians

Related Physician Tax Guides

QBI Deduction for Physicians

Complete Section 199A guide covering SSTB phase-outs, S-Corp salary tradeoff, and spin-off strategies.

Read guide

Entity Structure for Physicians

LLC vs S-Corp vs C-Corp: choosing the right business entity for your medical practice.

Read guide

Accountable Plan for Physicians

How to reimburse yourself tax-free for business expenses through your S-Corp.

Read guide

S-Corp Election Resource Guide

Form 2553 instructions, late election procedures, and state-specific requirements.

Read guide

W-2 vs S-Corp for Physicians

Side-by-side comparison of staying a W-2 employee versus electing S-Corp status for your physician income.

Read guide

Stop Overpaying Self-Employment Tax. Elect S-Corp the Right Way.

We'll analyze your income, specialty, and practice structure to determine the optimal S-Corp salary, project your payroll tax savings, and model the QBI deduction interaction. One call. Real numbers. No obligation.

Book a Free S-Corp Strategy Call

No obligation • Takes 30 minutes • We bring the numbers