The LLC versus C corp choice is really a question about where the money ends up. If the plan is venture funding and an eventual acquisition or IPO, the C corp is nearly mandatory. If the plan is a profitable product paying its founder for years, the LLC usually wins on taxes. Solo founders get this wrong most often by copying funded startups they admire while actually running a bootstrapped business, or the reverse.
Raising money points to the C corp
Venture investors overwhelmingly require a Delaware C corporation. The reasons are structural: preferred stock for priced rounds, a stock option pool for hires, familiar governance under Delaware law, and no pass-through income landing on investors' returns. The C corp files its own Form 1120 and pays its own tax at the flat 21% rate; losses stay inside the company as carryforwards rather than deducting on your 1040.
The C corp also carries the single biggest tax prize in startups: qualified small business stock under Section 1202. Founders holding QSBS in a qualifying C corp for the required period, historically five years, have been able to exclude a large capped amount of gain at exit entirely from federal tax; the cap and details have been revised in recent law changes, so check current guidance. Only C corp stock qualifies, and the holding clock starts when the stock is issued. If a venture-scale exit is the goal, that clock is a reason to incorporate sooner rather than later.
The cost is double taxation on distributed profits: the corporation pays 21%, and dividends to you are taxed again personally. Startups reinvesting everything barely feel this; a profitable company paying its owner from earnings feels it every year.
Bootstrapping points to the LLC
A solo LLC is a disregarded entity: profits pass straight through to your personal return once, with no corporate layer. You take draws freely, file on Schedule C, and pay income tax plus 15.3% self-employment tax on net profit. Administration is thin, and when profit gets strong, the LLC can file Form 2553 to be taxed as an S corporation, splitting income into a reasonable salary and distributions that escape self-employment tax. For a founder building a cash-generating SaaS with no outside investors, that LLC-then-S-corp path usually beats the C corp on total tax, year after year.
Converting later is possible, the QSBS clock is not
The decision is not permanent. Converting an LLC into a Delaware C corp at the moment you raise a priced round is routine, and accelerators and VCs process it constantly. What conversion cannot do is backdate: the QSBS holding period starts only when C corp stock is issued, and years spent as an LLC do not count. So the honest test is intent. Genuinely planning to raise within a year or two: start as the C corp and start the clock. Building for profit and independence: take the LLC, enjoy single taxation, and convert if the plan ever changes.