How startup valuation really works

Startup "valuation" is not an appraisal. Early on it is a polite way to describe how much of the company you are selling for how much cash. Later it starts to look like public-market multiples of revenue. Confusing those two regimes — or chasing a high headline without reading the terms — is how founders create down round pain two years later.

Concept

Pre-money valuation is the agreed value of the company before new cash. Post-money is pre-money plus the investment. In a priced round, investor ownership is check size / post-money.

Step	Concept	What it answers
1	Ownership-backed valuation	How do you back out a seed price from "% sold"?
2	Revenue multiples	When does ARR × multiple take over?
3	Valuation vs terms	When does a higher headline leave common worse off?

The risk of over-raising

Raising "as much as you can" at a peak multiple feels like winning. Runway is real — but it creates obligations.

Growth expectation. A $200M post on $5M ARR implies the next round needs a story consistent with that price. Miss, and you face a flat or down round.
Dilution of discipline. Extra capital funds experiments that never should have been funded.
Employee morale. Options granted near a peak 409A look underwater after a reset (employee equity).
Preference overhang. Large preferred stacks can mean common gets nothing until exits are very large.

A cleaner strategy: raise enough to hit milestones that support the next round at a step-up you can explain, with 18–24 months of runway and a buffer. Valuation as planning, not as scoreboard.

AI-era dynamics (as of 2025–2026)

AI startups have seen compressed cycles, outsized seed and Series A checks, and valuations that look like growth-stage numbers on seed-stage revenue. Ownership targets did not disappear; check sizes grew, so posts grew. Many "valuations" are SAFE caps, or poorly compared to noisy usage-based ARR. When the music slows, companies priced on narrative without retention learn about down rounds quickly. Use the same tools: back out ownership, stress-test the next round, prefer clean terms.

Common mistakes

Celebrating post-money without pool and prefs. The package is the deal.
Citing only the hottest three AI comps. Match growth rate, not vibes.
SAFE caps already above the proposed priced pre-money. Converting holders will own more than you expect — run SAFE math.

Key takeaways

Early valuation ≈ round size ÷ target ownership. It is negotiated, not appraised.
Later valuation leans on ARR × multiple, adjusted for growth and efficiency.
Headline post-money without terms is incomplete.
Over-raising into an indefensible number is how down rounds are born.