Most readers will never run a venture-scale company. The typical business this chapter serves is small and asset-light: one or two founders, few or no employees, and — because the costs are mostly the founders’ own time — high profit margins. Consulting practices, design and software shops, professional practices, and niche product businesses all fit the mold. For them the architecture is settled, and worth stating plainly.
A high margin works against you in one specific way: with few real expenses, you have little to deduct and a great deal of profit, and the temptation is to manufacture deductions. Resist it. The returns here come from structure, not from inflating expenses — the moves below, applied in order, do far more than another marginal write-off, and none of them invites an audit.
For a single founder, the path is the one already described: operate as a sole proprietor or single-member LLC, and elect S-corporation status once profit clears the break-even (section “Reasonable Compensation and the Break-Even Point”) — which, on high margins, happens fast. Be clear-eyed about which benefit you are buying. An asset-light business owns little qualified property, so above the IRC §199A threshold the S-corporation salary is the only thing that can unlock the Qualified Business Income (QBI) deduction — but if the business is a specified service trade, as most one-person professional practices are, the deduction phases out entirely at the income ceiling regardless. There the S-corporation still earns its keep through the self-employment-tax saving alone; just know that is the lever you are pulling.
For two founders, two things that never arise for a solo owner become essential. First, put the ownership terms in writing: an operating or partnership agreement, and a buy-sell agreement specifying what happens to a departing owner’s share on death, disability, divorce, or a plain falling-out — ideally funded with life insurance, so the surviving owner has cash to buy the share rather than finding themselves in business with a former partner’s heirs (section “First-to-die Policy”). Second, if both founders work in the business, both draw reasonable salaries under an S-corporation, and the profit split and the salaries must track each founder’s actual contribution — a mismatch invites disputes with the IRS and, worse, between the founders.
Finally, high margins mean large quarterly estimated payments. Get the section “Safe Harbor” right from the first profitable year; a high-margin business that ignores estimated taxes merely converts a tax bill into a tax bill plus penalties.