We see a lot of cap tables, and we’ll be blunt: most early-stage startups get at least a few things wrong. Some mistakes are harmless—like rounding ownership to a tenth of a percent. Others can wreck a financing, trigger tax disasters, or undermine employee trust.
Here are five of the most common cap table compliance mistakes we see and how to avoid them.
- No One Knows What the Cap Table Actually Says
Startups often track ownership in a shared spreadsheet. At first, that’s fine. But over time, the “official” version can drift—especially if legal documents and board consents aren’t kept in sync.
A common scenario: founders think someone owns 2%, but the signed option agreement was never countersigned or doesn’t match the board’s approval. Worse, during diligence for a Series A, the company realizes the total option pool adds up to 22%—not the 15% investors expected.
What to do:
- Keep a single source of truth (Carta, Pulley, etc.).
- Confirm every grant matches a signed board consent and agreement.
- Reconcile your model regularly with actual, signed equity documents.
- Improper Vesting Triggers
Equity awards to service providers—founders, employees, advisors—should always be subject to clear vesting schedules and forfeiture terms. Yet we often see restricted stock issued without appropriate vesting, or founders believing shares are “earned” when no documentation says so.
This becomes a serious issue in:
- Founder departures
- Equity repurchases
- 83(b) elections and tax reporting
- M&A diligence
What to do:
- Use clear time-based vesting schedules for stock and options.
- For early founder equity, implement reverse vesting and file 83(b)s.
- If you’re fixing mistakes, work with counsel—don’t patch informally.
- Failure to Track Convertible Instruments Properly
SAFEs and convertible notes are not a percentage of equity until they convert. But many startups mistakenly model them as fixed ownership (“Jane gets 5%”), without accounting for valuation caps, discount mechanics, or pro rata rights. This leads to blown-out dilution or legal disputes in priced rounds.
What to do:
- Track all SAFEs and notes with key terms: cap, discount, MFN, etc.
- Use standard post-money templates if you want predictable outcomes.
- Before your priced round, model multiple scenarios and confirm expected conversions with counsel and investors.
- Missing or Defective Board and Stockholder Approvals
Every equity issuance requires formal board approval—and sometimes stockholder approval too. Founders often skip this step or use incomplete documentation (e.g., an unsigned email summary instead of a board consent). That’s fine—until a financing lawyer asks for a clean stock ledger and board resolutions going back to formation.
What to do:
- Document all stock, option, and SAFE issuances with signed consents.
- Review your board and stockholder mechanics—especially for Delaware C corps.
- If anything’s missing, fix it now. It’s much easier before you’re in diligence.
- Tax Non-Compliance (409A, 83(b), Section 1202, etc.)
Cap table compliance isn’t just about who owns what—it’s also about how that ownership was issued. Did you issue options at fair market value? Did you file 83(b) elections on time? Are you preserving QSBS eligibility for founders and early investors?
These tax issues can materially affect company value—and expose you to liability if they’re mishandled.
What to do:
- Get a 409A valuation before issuing options.
- File 83(b) elections within 30 days of share grants (no exceptions).
- Talk to tax counsel before doing anything unusual with equity.
Final Thoughts
Cap table compliance isn’t exciting. But it’s one of the few things that can quietly destroy value if ignored—and create major friction in financings, exits, or even key hires.
If you suspect your cap table has issues, don’t wait. Most problems can be fixed. But the earlier you catch them, the cheaper and cleaner the fix.
Need help reviewing or remediating cap table issues?
We do this every week for fast-growing startups and their counsel. Reach out to start a conversation.
Mike Baker frequently advises with respect to cap table matters and also works with corporate attorneys who are expert in this area. He possesses a breadth and depth of experience in tax and employee benefits & compensation law that spans multiple decades. For additional information, please contact mike@mbakertaxlaw.com.