You had a great pitch. Strong revenue. Clean product. And then your lead investor asked to see the cap table.
Three weeks later, your Series A collapsed — not because your business was weak, but because the math in your cap table was a mess.
I've reviewed hundreds of cap tables. The errors that kill funding rounds aren't complicated. They're arithmetic mistakes that founders make in year one, when "it's just a small stake" seems fine.
This is what actually kills deals.
What a Cap Table Actually Shows
A cap table is a running ledger of every equity claim against your company — who owns what, at what valuation, and what happens to those numbers when new money enters.
The simplest cap table has three columns: shareholder name, shares held, and percentage ownership.
The problems start when you add SAFEs and convertible notes (with different valuation caps), option pools (pre or post-money), advisory shares (with vesting cliffs), bridge round dilution, and multiple SAFE instruments with conflicting terms.
The moment a Series A investor requests a clean cap table, you need to produce one that answers: Who owns what, fully diluted? And that number needs to be defensible under scrutiny.
Mistake #1: Ignoring the Option Pool Size Until It's Too Late
Every investor will ask: "What's your option pool?" Most founders answer this vaguely. That's a red flag.
The standard practice in 2026: investors expect a 10–15% option pool in the cap table at Series A — often carved out before the round closes, not after.
The math: If you have 10,000,000 shares outstanding and a 10% option pool, that's 1,111,111 new shares. That dilution comes out of the founders' stack before the investor even writes a check.
YC's post-money SAFE changed the landscape here. If you raised on a post-money SAFE (the current standard), your option pool was likely established with a known ceiling. But if you raised on an early pre-money SAFE with a small pool, you may have a pool that's now too small to hire the talent your Series A requires.
Fix before the round: Get your option pool sized correctly. Plan for 12–18 months of hiring. If your pool is below 8%, most Series A investors will push you to increase it — and that negotiation can drag.
Mistake #2: Multiple SAFEs with Different Caps
This one shows up constantly. A founder raises a $200K SAFE at a $5M cap, then a $100K SAFE at a $6M cap, then another at $8M cap. They don't think about the ordering implications because "SAFE is simple."
It's simple until you're at Series A and your investor runs the dilution calculation across all three instruments at different caps. The results can be genuinely surprising — founders who think they own 70% discover they own 58% after all SAFEs convert.
The conversion math: When a SAFE converts at Series A, it converts at the lower of the SAFE cap and the Series A price per share. If you have multiple SAFEs at different caps, you need to model each conversion scenario.
The simplest fix: track your SAFEs in a centralized spreadsheet with the exact cap, investment amount, date, and conversion preference from day one. Review it every time you take a new SAFE.
Mistake #3: Not Modeling Dilution Across Three Rounds
Founders typically model one round. Sophisticated founders model two. Almost no one models three.
Here's why it matters: your Series A investor is looking at what the cap table looks like at Series B, not just at their entry. If they're going to own 20% and the founders are going to be below 40% by Series B, they'll have concerns about founder motivation and retention.
| Round | Pre-money | Investment | Post-money | Investor % | Founder % |
|---|---|---|---|---|---|
| Seed | $8M | $2M | $10M | 20% | 60% |
| Series A | $25M | $8M | $33M | 24% | 43% |
| Series B | $60M | $15M | $75M | 20% | 30% |
Your Series A investor will run this math. You should run it first.
Mistake #4: Forgetting Advisory Shares Have Vesting — and Cliffs
Advisory shares are common. They're also commonly misrepresented on cap tables.
If you issued 50,000 shares to an advisor with a 12-month cliff, those shares don't appear on the cap table the way you'd expect during the cliff period. If a Series A investor asks "who owns 50,000 unvested shares?" and you don't know the answer, that conversation gets uncomfortable fast.
The standard advisory share structure in 2026:
- 0.25–0.5% equity for a meaningful advisor
- 12-month cliff (advisor gets nothing if they leave before month 12)
- 24-month vest thereafter
- Clean documentation of vesting schedule in your option registry
Advisors should be issued options or restricted stock, not common shares. If you issued common shares to advisors, get that corrected before your Series A — it's a governance issue.
Mistake #5: Late-Stage Option Repricing Without Proper Documentation
Option re-pricing happens when you've had a down round or a bridge that required adjusting strike prices. It's a legitimate mechanism. It's also one of the most audited items in a Series A due diligence process.
If you repriced options, you need: board approval documented in minutes, a 409A valuation from a qualified appraiser, written consent from each option holder, and accurate financial statements reflecting the new strike price.
Without these documents, your Series A investor's counsel will flag it. And that flag can add weeks to your close.
How to Review Your Own Cap Table Before an Investor Does
- Get your cap table into a clean spreadsheet — shareholder, shares, percentage, fully diluted.
- Model every SAFE conversion at your expected Series A valuation.
- Add the option pool (fully vested + expected grants over next 18 months).
- Run three-round dilution math.
- Identify anything that would make a Series A investor uncomfortable.
If you find something in Step 5, fix it before the investor asks. A clean cap table is a competitive advantage in a funding round. Investors remember founders who made diligence easy.
Need help reviewing your cap table before your Series A?
Book a free 15-minute intro call with Attorney Courtney Logan to identify issues before they become deal-breakers.
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