US LLC or C-Corporation for Non-US SaaS Founders
Published 3 September 2026 · Reviewed by Ashfaq Khattak, US Tax Consultant
A SaaS founder outside the US has one decision that matters more than the state: LLC or C-corporation. If you will raise from US investors, the answer is a Delaware C-corporation and forming an LLC first will cost you a conversion. If you are bootstrapping to revenue, a Wyoming LLC is cheaper, simpler and converts later if the plan changes.
The second thing that matters is sales tax, which for software is genuinely complicated: a number of US states tax SaaS and a number do not, and the obligation is triggered by economic thresholds in each state rather than by where you are.
LLC or C-corporation, decided honestly
| Wyoming LLC | Delaware C-corp | |
|---|---|---|
| Cost to run | Low | Higher: franchise tax, annual report, more accounting |
| Takes a SAFE or priced round | Not without converting | Yes, this is what investors expect |
| Employee stock options | Awkward | Straightforward |
| Tax on profits | No entity-level federal tax | Entity-level tax, then again on dividends |
| Federal filing, one foreign owner | Pro-forma 1120 + Form 5472 | Form 1120, a real return |
| Right when… | Bootstrapping, or revenue-funded | Raising US venture money within ~2 years |
Converting an LLC to a Delaware C-corp later is a normal, well-trodden transaction. It is not free, but it is far cheaper than running a C-corp for two years you did not need one. Do not form a C-corp on the possibility of raising.
SaaS sales tax, the part nobody warns you about
Software as a service is taxable in some US states and not in others, and the states that tax it do not agree on what counts. Your obligation in a given state is triggered by economic nexus — a threshold of sales or transactions into that state — not by your having anything physical there.
What that means practically:
- Early on, you almost certainly have no obligation anywhere. Thresholds are typically measured in six figures of in-state sales.
- As you grow, you cross thresholds one state at a time, and each crossing is a registration and a filing cadence.
- Selling through a marketplace or a merchant of record shifts it. Some payment and reseller platforms take on the sales-tax obligation; a plain Stripe integration does not.
- Do not register everywhere pre-emptively. Registration creates a filing obligation whether or not you owe tax, and unwinding it is work.
Track your sales by state from the beginning. It is trivial at the start and painful to reconstruct at $1m ARR. See sales tax permit filing.
The federal filings
- Single foreign member LLC: pro-forma Form 1120 with Form 5472, annually, even at zero revenue.
- Multi-member LLC: Form 1065 and a Schedule K-1 per member — which for a two-founder company in two countries is the return that needs care.
- C-corporation: Form 1120 as a real return, plus withholding considerations on any dividend to a foreign shareholder, where a tax treaty may reduce the rate.
- BOI report with FinCEN, and an update whenever the cap table changes who counts as a beneficial owner.
That last point catches funded companies: taking on an investor who crosses the ownership threshold is a BOI update, not just a cap-table entry.
What we do
- Ask about your funding plan first, because it decides entity type, and entity type decides everything after it.
- Form the LLC or the C-corporation in the state that matches that answer.
- EIN from the IRS, no SSN required.
- Operating agreement or bylaws, drafted for the ownership you actually have and the one you are heading for.
- BOI report with FinCEN, and updates as ownership changes.
- Annual federal filings, and a sales-tax nexus review as revenue grows so a threshold is crossed knowingly.
Frequently asked questions
Should a SaaS founder form an LLC or a C-corporation?
A Wyoming LLC if you are bootstrapping, because it is cheaper and simpler and converts later. A Delaware C-corporation if you will raise from US investors within about two years, because SAFEs, priced rounds and stock option plans are written for corporations.
Is SaaS subject to US sales tax?
In some states and not others, and the states that tax it do not agree on what counts. Your obligation in a given state is triggered by economic nexus — a threshold of sales into that state — rather than by having anything physical there. Early on you almost certainly have no obligation anywhere.
Should I register for sales tax in every state to be safe?
No. Registration creates a filing obligation whether or not you owe tax, and unwinding it is work. Track your sales by state from the beginning and register when you actually cross a threshold.
Does taking on an investor affect my BOI report?
It can. An investor crossing the beneficial ownership threshold is a BOI update to FinCEN, not just a cap-table entry.
Official sources
Rules, forms and fees on this page come from the following official sources, each checked on 2026-09-03. Government fees and deadlines change; confirm the current figure on the agency's own page before you file.