Equity, tax and compliance
Cap Table Best Practices and Common Mistakes for Startups
The short answer
A cap table is the record of who owns what in the company: every share issued, every option granted, the unissued pool and every SAFE, note and warrant, shown on an issued basis and a fully diluted basis. It is only correct if each line ties to a signed document approved by the board. Keep a ledger of every transaction, reconcile it to the documents at least quarterly, model SAFEs and future rounds in a separate pro forma, and never promise equity as a percentage. Messy cap tables are among the most common reasons financings and acquisitions slow down.
Key numbers
| Benchmark | Figure | Source and date |
|---|---|---|
| Median founding team ownership after seed | 55.1% | Carta (2025-2026) |
| Median founding team ownership after Series A | 36.6% | Carta (2025-2026) |
| Median seed-stage option pool | 11.8% | Carta (2025-2026) |
| Median dilution per round (US software) | About 20%, not rising | Carta, 2025 (2,000+ rounds) |
| Post-money SAFEs as share of all SAFEs | 82% | Carta, July 2025 |
| Holders of record that can trigger SEC registration | 2,000 (or 500 non-accredited) with more than $10M of assets | Exchange Act Section 12(g) |
What a cap table contains
The summary view
| Column | Meaning |
|---|---|
| Holder | Person or entity |
| Class | Common, Series Seed Preferred, Series A Preferred |
| Issued shares | Shares actually issued and outstanding |
| Options and RSUs outstanding | Granted but not exercised or settled |
| Warrants | As if exercised |
| Convertibles | SAFEs and notes, as-converted estimate (clearly labeled) |
| Fully diluted shares | Issued + outstanding awards + unissued pool + convertibles as converted |
| Issued % and fully diluted % | Two different denominators |
| Voting % | Usually issued shares (preferred votes as converted) |
The ledger
Behind the summary, a ledger lists every event in order: issuance, grant, exercise, repurchase, cancellation, transfer, conversion, split. For each: date, holder, class, number of shares, price, consideration (cash, IP, services), certificate or notice number, vesting schedule, 83(b) status and the approving board or stockholder consent.
Issued vs fully diluted
These are different questions:
- Issued basis answers "who votes and who owns shares today?"
- Fully diluted basis answers "what percentage will each holder have if everything converts and every option is granted and exercised?" Investors price rounds on a fully diluted basis, usually including the unissued pool and the shares needed for SAFEs and notes to convert.
- Exit basis answers "who receives what in a sale?" Unissued pool shares receive nothing; out-of-the-money options are usually worthless; preferences apply. See liquidation preference.
Acme today: founders 8,000,000 shares issued; options granted 600,000; unissued pool 400,000; one post-money SAFE of $1,000,000 at a $10,000,000 cap.
- Issued: 8,000,000 shares. Founders = 100% of issued and of votes.
- Fully diluted before the SAFE: 9,000,000. Founders = 88.9%; options 6.7%; pool 4.4%.
- Fully diluted including the SAFE as converted (estimate): SAFE = 10% of the capitalization including it: 9,000,000 / 0.90 = 10,000,000 shares, SAFE 1,000,000. Founders = 80.0%.
All three numbers are "right". A good cap table labels which one is shown.
Best practices
- One source of truth. Use one cap table tool or one controlled spreadsheet, not copies in email.
- Document first, then record. Nothing goes on the cap table until there is a signed agreement and a board approval.
- Shares, never percentages. Grants and promises are stated in numbers of shares.
- Record convertibles on day one. Each SAFE and note with amount, cap, discount, type (post-money, pre-money, MFN), date and side letters.
- Track vesting and 83(b). For every restricted stock issuance and early exercise, the 83(b) deadline and filing date.
- Track the pool. Reserved, granted, exercised, cancelled and returned, available. Never grant more than is available.
- Reconcile quarterly against signed documents, stock ledger and board minutes.
- Keep a change log that shows who changed what and when.
- Model separately. Keep pro forma scenarios (next SAFE, priced round, pool increase) in a simulator, not in the official table.
- Watch authorized shares. Issued shares plus all reserved shares plus conversion needs must stay within the charter's authorized number.
Ten common mistakes
- Promising "X% of the company" in an email or offer letter. Leads to disputes about the denominator.
- Grants without board approval or without a 409A price. Can make the grant invalid or create Section 409A problems.
- Missing 83(b) elections for founders or early exercisers.
- Founder shares issued without vesting, or vesting terms on the cap table that do not match the agreement.
- SAFEs not recorded until the priced round, which then reveals more dilution than anyone expected.
- Mixing up pre-money and post-money SAFEs in conversion math. See the SAFE dilution calculator explained.
- Pool overallocated: offer letters promise more options than the plan reserves.
- Equity from several entities (a holding company, an LLC and the Delaware company) with no clear mapping.
- Rounding too early: round share numbers only at the end of a calculation; small rounding errors compound across conversions.
- Too many small holders from crowdfunding or friends and family without a single nominee or SPV, which makes consents slow.
Before a financing
- Reconcile the cap table with every signed document and fix discrepancies by board resolution.
- Prepare a pro forma showing the round, the pool top-up and every SAFE and note converting, with prices per share.
- Confirm authorized shares suffice for the round and conversions; amend the charter if needed.
- Check the Delaware franchise tax effect of any charter amendment. See Delaware franchise tax.
- Export a clean version for the data room.
What investors and acquirers check
- That every holder on the cap table has a signed document and every signed document appears on the cap table.
- That option grants match board approvals and 409A dates.
- That vesting schedules and acceleration match the agreements.
- That SAFEs and notes are modeled correctly for the type (post-money or pre-money) and that MFN holders are identified.
- That authorized shares are sufficient for all reserved and convertible shares.
Key takeaways
A cap table is a legal record before it is a spreadsheet: each number should point to a signed, board-approved document. Keep three views (issued, fully diluted and exit), label which one you are showing, model future events separately, and reconcile regularly. Fixing a discrepancy takes minutes when you find it yourself and days when an investor's counsel finds it during exclusivity, so treat the quarterly reconciliation as a standing task for the CEO or finance lead.
Frequently asked questions
What is a cap table?
A capitalization table: a record of all the company's securities and their holders, shown on issued and fully diluted bases, with a ledger of every transaction.
What does fully diluted mean?
The share count assuming all outstanding options and warrants are exercised, the unissued pool is granted, and all preferred stock, SAFEs and notes convert. Investors use it to set the price per share.
Should SAFEs be on the cap table?
Yes. Record each SAFE when it is signed and funded, and show its estimated as-converted shares in a separate, clearly labeled column or scenario.
Is a spreadsheet good enough for a cap table?
At formation, often yes, if it is controlled and reconciled. Once you have options, several SAFEs and investors, a dedicated tool with a ledger and audit trail reduces errors.
How often should I update the cap table?
After every issuance, grant, exercise, repurchase, transfer or financing, and reconcile it at least quarterly.
What is the difference between authorized and issued shares?
Authorized shares are the maximum the charter allows the company to issue. Issued shares are those actually sold or granted and outstanding. Ownership percentages use issued or fully diluted shares, not authorized shares.