Entity structure — LLC vs S-Corp-elected LLC vs C-Corp
Status: research-only. Nothing here is legal or tax advice. Before choosing a structure, consult a business-formation attorney and a CPA, both licensed in the state where you will operate.
Last updated: 2026-04-22. Verify all citations and fee figures at decision time.
TL;DR
For a pre-revenue single-operator SaaS (Raxx) with no outside investors yet, the three realistic paths are (1) single-member LLC taxed as a disregarded entity, (2) single-member LLC with an S-Corp election on Form 2553, and (3) a C-Corp (usually Delaware). The single-member LLC is the cheapest and simplest; the S-Corp election becomes interesting once the business is profitable enough that payroll + reasonable-salary savings beat the extra payroll-provider + tax-prep costs; the C-Corp is the path if institutional capital (VC) is on the table. The holding-LLC-over-operating-LLC pattern is real and useful for IP isolation but adds cost and bookkeeping — rarely worth it pre-revenue. This document compares the four realistic options with fact-based tradeoffs, not recommendations.
Facts (with citations)
LLC is a state-law creature; its federal tax classification is a separate choice. By default, a single-member LLC is a disregarded entity for federal tax (income flows to the owner's 1040 Schedule C); a multi-member LLC defaults to partnership taxation. An LLC can elect to be taxed as a C-Corp (Form 8832) or an S-Corp (Form 2553). [IRS S-Corp rules: 1]
S-Corp requirements. Must be a domestic corporation or LLC, have ≤100 shareholders (all US citizens/residents, no entity shareholders except certain trusts/estates), one class of stock, and must file Form 2553 signed by all shareholders. [1]
S-Corp compensation doctrine. The IRS requires S-Corp shareholder-employees who perform services for the corporation to receive reasonable compensation (W-2 wages) before taking non-wage distributions. The IRS has explicit authority to reclassify distributions as wages if compensation is unreasonably low. [IRS compensation guidance: 2]
C-Corp double taxation. A C-Corp pays corporate income tax at 21% federal (plus state) on profits, and shareholders pay personal tax on dividends when distributed. Pass-through entities (LLC, S-Corp, partnership) avoid this second layer. [SBA: 3]
LLC liability. An LLC "protects you from personal liability in most instances" — personal assets are generally shielded from business debts and lawsuits, subject to piercing-the-veil exceptions. [SBA: 3]
Form 2553 timing. Election must be filed no later than 2 months and 15 days after the start of the tax year the election is to take effect, or at any time during the preceding tax year. For a calendar-year entity wanting the election effective for the current year: by March 15. Late-election relief is available via Rev. Proc. 2013-30 if eligibility requirements are met. [IRS Form 2553 instructions: 4]
Options compared
Option A — Single-member LLC, disregarded entity (default)
Dimension
Detail
Federal tax treatment
Disregarded entity — income and expenses flow to owner's Form 1040 Schedule C
Self-employment tax
Full 15.3% SE tax on all net self-employment income (Social Security + Medicare) up to the Social Security wage base, then 2.9% above
Owner compensation
Owner draws — not a deductible expense, not W-2 wages
Liability protection
Yes (state-law)
Payroll provider needed
No
Annual federal filing
Schedule C on 1040 only
Annual state filing
LLC annual report + state franchise tax where applicable
Cost to form
State formation fee (varies — see state-of-formation.md)
Best-fit profile
Pre-revenue or low-revenue founder; simplest setup; no payroll complexity
Option B — Single-member LLC with S-Corp election (Form 2553)
Dimension
Detail
Federal tax treatment
Pass-through at entity level; owner is a shareholder-employee drawing W-2 wages plus distributions
Self-employment tax
FICA (15.3% split as employer + employee portions) on W-2 wages only; distributions are not subject to SE/FICA
Owner compensation
Must be "reasonable compensation" as W-2 wages; reinforced by IRS and multiple tax-court cases (Joly v. Commissioner; Veterinary Surgical Consultants v. Commissioner, et al.) [2]
Liability protection
Same as LLC (state-law)
Payroll provider needed
Yes — need to run real payroll, file 941/940, issue W-2
Annual federal filing
Form 1120-S (entity) + K-1 to owner + owner's 1040
Annual state filing
LLC annual report + state franchise tax + state payroll filings
Profitable founder netting well above a defensible reasonable salary — the "FICA saved on distributions" has to exceed payroll + extra tax-prep cost to be worth it. A CPA can run the breakeven; common heuristic often cited is net income above ~$70k–$100k/year before it makes sense, but this is jurisdiction- and facts-specific — confirm with your CPA.
Option C — C-Corp (usually Delaware)
Dimension
Detail
Federal tax treatment
Separate taxpayer; 21% federal corporate rate; dividends taxed again at shareholder
Self-employment tax
No SE tax on distributions; wages still FICA-subject
Owner compensation
W-2 wages (same reasonable-comp analysis); dividends are not deductible to the corp
Liability protection
Yes; the most battle-tested form
Payroll provider needed
Yes
Annual federal filing
Form 1120
Annual state filing
Annual report + franchise tax (Delaware assessed on either Authorized Shares method — min $175 — or Assumed Par Value Capital method — min $400 — max $200,000 except for Large Corporate Filers; due March 1 annually) [5]
Founders planning to raise institutional capital (VCs expect C-Corp, usually Delaware, because of § 1202 QSBS eligibility and standardized stock structures). QSBS = Qualified Small Business Stock — a federal tax exclusion on gains for qualifying C-Corp stock held 5+ years; confirm current rules with CPA.
Option D — Holding-LLC over operating-LLC
Dimension
Detail
Structure
A parent LLC (often in Wyoming or Delaware) owns 100% of an operating LLC (often in the home state) that holds the business activity. IP can sit in the parent; operations (revenue, contracts, employees) in the child.
Liability isolation
Separates IP from operational liability; if the operating entity is sued, the parent's IP is one step removed
Tax treatment
Usually a disregarded-entity chain ending at the individual (or a partnership/S-Corp at the parent). No inherent tax savings; tax is driven by the top-most tax classification, not by the number of LLCs.
Complexity
Two sets of annual reports, two registered agents, two sets of books, intercompany agreements (the parent licenses IP to the child). The intercompany IP license must be at arm's length to hold up if challenged.
Cost
~2× state filing + registered-agent costs per year; higher bookkeeping and tax-prep
Best-fit profile
Owner with significant IP value, multi-line operations, or who's been advised by an attorney that the asset-isolation benefit justifies the overhead. Almost never recommended pre-revenue.
Comparison table (summary)
Factor
SMLLC default
SMLLC + S-Corp
C-Corp
Holding+Op LLC
Setup cost
$
$ + payroll
$$
$$
Annual ops cost
$
$$
$$$
$$$
Liability
Good
Good
Best-tested
Best
SE / FICA exposure
High
Reduced via distribution split
Mixed
Depends on top entity
Fundraising fit (VC)
No
No
Yes
No (reorg before VC)
QSBS § 1202 eligibility
No
No
Yes (if conditions met)
No
Complexity
Low
Medium
High
High
Pre-revenue best fit
Strong
Weak
Only if VC is near-term
Weak
Jurisdiction flags
State of formation vs. state of operation. If you form in Delaware but operate in State X, you almost always need to foreign-qualify in State X — paying registration fees, franchise tax, and appointing a registered agent in both states. See state-of-formation.md.
Franchise tax minimums. Delaware LLC: $300/year flat (due June 1) [5]. California LLC: $800/year minimum franchise tax (not confirmed in this pack — verify with CA FTB).
Home-state LLC is almost always cheapest if you live and operate there. Delaware/Wyoming/Nevada formations sound glamorous but you usually pay twice if you operate elsewhere. See state-of-formation.md.
S-Corp election is federal, but states vary on whether they honor it: most do (pass-through at state level too), a handful do not (New York requires a separate state-level S-Corp election; New Jersey used to, now conforms to federal). Confirm with your CPA for the operating state.
Timing / deadlines
Form 2553 (S-Corp election): 2 months + 15 days after the start of the tax year (for calendar-year entities, March 15) or any time in the preceding year. [4]
Form 8832 (entity classification election, for electing C-Corp taxation of an LLC): election effective up to 75 days before filing.
Form SS-4 (EIN): file after state entity formation — online issuance is immediate. See ein-and-tax-ids.md.
Annual report / franchise tax deadlines are state-specific — see state-of-formation.md.
Questions for your business-formation attorney
Given Raxx is pre-revenue SaaS operated by a single founder, do you recommend a single-member LLC in my home state, or a Delaware/Wyoming structure with home-state foreign qualification?
At what revenue threshold would you typically recommend layering an S-Corp election on the LLC for a solo operator?
Any reason to go straight to a Delaware C-Corp now if I might raise angel/VC money in 12–24 months? (QSBS § 1202 holding period starts at C-Corp issuance.)
Should IP (future Raxx codebase, MOOSEQUEST mark assignment) sit in the same entity as operations, or in a holding LLC? What's the breakeven complexity-wise?
Do I need a founder's IP-assignment agreement transferring all pre-formation work (code, designs, trademark rights) into the new entity on day 1? Can you draft one?
Any state-specific pitfalls (piercing the veil, charging orders, single-member LLC protection variance by state) I should know about for my operating state?
Questions for your CPA
For a solo-founder SaaS at $X projected revenue in year 1 and $Y in year 2, does the S-Corp election save enough in FICA to justify payroll + tax-prep? Can you produce a breakeven memo?
What's a defensible reasonable-salary figure for a founder-CTO of a pre-revenue / early-revenue options-trading SaaS? (See owner-compensation.md for IRS authority.)
If we form the entity mid-year, does it make sense to elect S-Corp status for this tax year or wait for next year and start with a full calendar year?
Are there any state-level consequences of the federal S-Corp election in my operating state I should plan for?
Sources
IRS — S corporations overview (eligibility requirements, one class of stock, Form 2553). https://www.irs.gov/businesses/small-businesses-self-employed/s-corporations
IRS — S corporation compensation and medical insurance issues (reasonable compensation doctrine, court-case authority, reclassification risk). https://www.irs.gov/businesses/small-businesses-self-employed/s-corporation-compensation-and-medical-insurance-issues
SBA — Choose a business structure (LLC, S-Corp, C-Corp summaries, liability framing). https://www.sba.gov/business-guide/launch-your-business/choose-business-structure
IRS — About Form 2553, Election by a Small Business Corporation. https://www.irs.gov/forms-pubs/about-form-2553
Delaware Division of Corporations — Annual Report and Tax Information (LLC/LP/GP $300 annual tax, corporate franchise tax methods, March 1 / June 1 deadlines). https://corp.delaware.gov/frtax/
Do not form an entity, elect a tax classification, or sign any founder's agreement without first consulting a business-formation attorney and a CPA licensed in your operating state. This document is preparation material only.