A company should generally be valued at least once a year, typically aligned with fiscal year-end reporting. However, certain events trigger the need for an immediate valuation, such as raising capital, merging with or acquiring another business, bringing on new partners, or planning an exit.
Early-stage startups may need valuations more frequently as they hit growth milestones. Established private companies often conduct valuations annually for tax and planning purposes, while public companies are effectively valued continuously through daily stock market pricing.