Software & digital7 min read

Best structure for a SaaS company: LLC, C-corp and the tax math

This is the one business model where the standard answer inverts. For most founders an LLC is right and a C-corp is an expensive affectation. For a founder who will raise institutional money, the LLC is a problem they will pay a lawyer to undo.

The short answer

Bootstrapping or raising nothing beyond angels: LLC, taxed as a partnership or disregarded. Raising a priced round from funds: Delaware C-corp, from the start. The deciding fact is one you already know about yourself.

Published August 23, 2026

Almost every business model has one right entity and a set of edge cases. SaaS has two right entities, and picking between them is not a tax question — it is a question about who is going to own the company in three years.

Get it wrong in the expensive direction and you pay a law firm five figures to convert an LLC into a Delaware corporation while a term sheet sits on the table. Get it wrong in the other direction and you have spent years filing corporate returns and maintaining a board for a company that was always going to be owned by two people.

The question that decides it

Will an institutional fund own part of this company?

If the honest answer is no — you are bootstrapping, or building to a lifestyle business, or intending to sell to a strategic buyer or a private-equity roll-up — then an LLC is the better instrument and the rest of this page is about running one well.

If the answer is yes, form a Delaware C-corporation now. Not because Delaware is a tax haven — it is not, and you will still owe tax where you actually operate — but because the entire venture financing stack is built on Delaware corporate law. Priced rounds, preferred stock, option pools, safes, drag-along provisions: all of it assumes a Delaware corporation, and none of it maps cleanly onto an LLC operating agreement.

	LLC	Delaware C-corp
Tax on profit	Once, in the owners' hands	At the company, then again on dividends
Losses in early years	Flow through to the owners' returns, subject to basis and at-risk rules	Trapped at the company as carryforwards
Institutional investors	Most funds cannot or will not hold LLC interests	The default they are set up for
Employee equity	Profits interests — workable, unfamiliar, harder to explain	Option pool, ISOs, four-year vesting, understood by everyone
QSBS on exit	Not available	Section 1202 can exclude a large share of gain if the holding-period and other tests are met
Annual cost and admin	Low	Franchise tax, board minutes, a corporate return, usually a lawyer

QSBS eligibility is technical and easy to break. Treat it as a reason to be a C-corp early, not as a benefit you can bolt on later.

What Section 174A changed, and why it matters more if your developers are abroad

Software development costs were, for several painful years, required to be capitalised and amortised rather than deducted when incurred — which produced tax bills for companies that had no cash. P.L. 119-21 added Section 174A and restored immediate deduction of domestic research and experimental expenditure for tax years beginning after 2024.

The word doing the work is *domestic*. Research and experimental expenditure attributable to work performed outside the United States is still recovered over 15 years. For a SaaS company whose engineering team is in Warsaw, Lahore or Buenos Aires, that is not a footnote — it is the difference between deducting the engineering budget this year and deducting a fifteenth of it.

Domestic R&E: deductible currently under Section 174A, for tax years beginning after 2024.
Foreign R&E: capitalised and amortised over 15 years.
There are elections to capitalise domestic costs instead, and transition rules for amounts capitalised in tax years 2022–2024. Rev. Proc. 2025-28 sets out the procedure.

This is worth modelling before you decide where to hire, and it is worth documenting properly once you have. The allocation between domestic and foreign is a factual question about where the work happened, and it should be supported by something better than a recollection.

Is SaaS taxable? Only in about half the country

There is no federal sales tax, so "is SaaS taxable" has fifty answers. States land in roughly four camps, and the camp a state is in tells you almost nothing about its politics or its size:

Treatment	What it means for you
Taxable as software or as a digital service	Collect once you cross the state's economic-nexus threshold — commonly $100,000 of sales.
Taxable under a different label	Some states reach SaaS as a data-processing or information service, sometimes at a partial rate. The label matters because exemptions attach to labels.
Exempt for business buyers, taxable for consumers	Your B2B and B2C lines can have different answers in the same state.
Not taxable	Nothing to collect — but you may still have a registration or reporting duty.

State treatment changes by legislation and by department ruling. Confirm each state before you register, and re-check annually. Checked August 2026.

The practical consequence: a bootstrapped SaaS doing $40,000 a month across forty states may have collection duties in a handful and nothing in the rest, and the only way to know is to look. Sales-tax automation will calculate rates for you; it will not tell you whether your particular product is in scope in a particular state. That is a determination, not a calculation.

Merchant of record, or your own Stripe account

A merchant of record — Paddle, Lemon Squeezy, FastSpring and others — buys the software from you and sells it to the customer. They become the seller for tax purposes, which moves both US sales tax and EU/UK VAT off your books and onto theirs.

	Merchant of record	Your own Stripe account
Sales tax and VAT	Their obligation	Yours, in every jurisdiction where you have one
Cost	Typically 5%+ of revenue	Card processing, roughly 2.9% + 30¢
Customer relationship	They appear on the statement	You do
Failure mode	You are a merchant on someone else's platform, with their risk appetite	You own the underwriting relationship and the reserve risk

For a solo founder selling to consumers in thirty countries, the MoR spread buys back an enormous amount of compliance work and is usually worth it. For a B2B company with fifty enterprise customers on annual invoices, it is an expensive solution to a problem you barely have. The crossover is roughly where your buyers stop being individuals.

If it is a one-person product, ignore most startup advice

A micro-SaaS — one person, one product, maybe one contractor — is the same business for entity purposes and a different one for everything the startup ecosystem tells you to do. No Delaware, no board, no option pool. The conversion is available if you ever raise; until then it is cost with no benefit.

What does change earlier is the S-corp election, and the reason is arithmetic rather than anything about software. The election saves self-employment tax on profit taken as a distribution. What varies between business models is not the rule but how much profit a given amount of revenue produces:

Model	Revenue to reach $100,000 of profit
Dropshipping at ~10% net	About $1,000,000
Private label at ~20% net	About $500,000
Agency at ~30% net	About $330,000
Micro-SaaS at ~80% net	About $125,000

Illustrative. The point is the ratio, not the precise percentages.

A micro-SaaS at $10,000 of monthly recurring revenue is already in S-corp territory. A dropshipper at the same revenue is nowhere near it. This is why generic thresholds mislead — they are quoted in revenue when the rule is about profit. Model the election at roughly $80,000 of profit here, and weight durability: recurring revenue is more durable than most, but a product with one large customer is a contract rather than an annuity.

If you are not a US person

The S-corp election is unavailable. Section 1361 bars non-resident aliens from holding S-corporation shares. Ignore every article that recommends it.
A single-member LLC is disregarded, and that carries Form 5472 with a pro-forma Form 1120 each year. The penalty for missing it is $25,000, with or without tax due.
A C-corp is available to you, and is what you will need if you intend to raise from US funds. Dividends to a foreign shareholder are subject to withholding, reduced by treaty where one applies.
Where the work happens matters twice. Once for Section 174A, and again for whether your income is effectively connected with a US trade or business.

When to revisit

Trigger	What to reconsider
A priced round becomes plausible within a year	Convert to a Delaware C-corp before it becomes urgent.
Hiring your first employee	Payroll registration in their state, and whether that creates nexus.
Crossing $100,000 of sales into a state that taxes SaaS	Register and start collecting.
Moving engineering onshore or offshore	Re-model the Section 174A split before, not after.
Adding a co-founder	Equity mechanics are the reason most LLCs convert. Decide once.

The entity is step one of about nine

Founders 8 holds the company, the filings, the deadlines and the founder's own residency position in one workspace — and tells you what needs you this month.

Build your workspace

Deeper on saas

The parts of this that are specific to the activity rather than to companies in general.

Founders 8 does not provide tax advice. Tax residency depends on facts and rules specific to each jurisdiction — review your position with a qualified adviser.