Prenups for Founders: Protecting the Company You Haven't Built Yet

For founders and business owners, a prenup does one job worth everything else: it decides, in advance, whether the company — including the value it hasn't created yet — is separate or marital property. Without it, the default rules take over, and they're treacherous for builders: a business founded before marriage is separate property, but its appreciation during the marriage can become marital when it results from either spouse's efforts — which describes every operating company. The founder who marries at a $2M valuation and divorces at $200M may find the $198M of growth on the table, along with a valuation fight and a liquidity crisis to fund any buyout.

What the founder prenup actually specifies

The company (and successors, spinouts, and reinvested proceeds) as separate property, including appreciation; how equity compensation is treated — existing and future grants, vested and unvested, which is genuinely complex because unvested equity straddles the separate/marital line; the compensation offset (spouses have a fair counter: if the founder underpays themselves to grow separate-property value, the marital estate subsidized the company — good prenups address it with defined compensation or scheduled payments); and dispute mechanics — valuation method and appraiser selection decided now, while everyone's in love, rather than through dueling experts later.

The investor dimension nobody says aloud

Sophisticated investors and boards care about founder-divorce risk — a divorce that puts equity in play can destabilize a cap table (some companies require spousal consents at investment for exactly this reason [LEGAL REVIEW: framing]). A founder prenup is quietly part of being fundable. Timing and process rules from the general playbook apply doubly here: full financial disclosure, independent counsel both sides, months before the wedding — the more the prenup protects, the more its enforceability hygiene matters.