What to Do When an Investor Wants Anti-Dilution Protection?
Most deals include weighted average anti-dilution protection. Learn exactly what founders should negotiate before signing any term sheet.
Accept broad-based weighted average anti-dilution, which appears in 95-98% of venture deals. Push back hard on full ratchet provisions, which can cost you 15-25% additional dilution in a down round. Pair any anti-dilution clause with a pay-to-play provision to protect your cap table.
Anti-dilution protection is standard in venture financing. Nearly every term sheet includes it. The provision adjusts an investor's conversion price downward if you raise a future round at a lower valuation, giving them extra shares to compensate for the price drop. Your job is not to eliminate it but to ensure the right type appears in your term sheet.
Full ratchet treats the investor as if they originally invested at the lower price. Broad-based weighted average blends old and new prices based on total shares outstanding. That distinction can mean the difference between losing 3% or 25% of your company.
Anti-Dilution Types Compared
Feature | Full Ratchet | Narrow-Based WA | Broad-Based WA |
Prevalence in VC deals | 1-2% | 1-3% | 95-98% |
Founder dilution in 50% down round | 15-25% additional | 8-15% additional | 3-10% additional |
NVCA model default | No | No | Yes |
Investor leverage level | Very high | Moderate-high | Balanced |
Founder recommendation | Reject | Negotiate carefully | Accept as standard |
How Each Type Hits Your Cap Table
Consider a 50% down round where your company raises at half its previous valuation.
• Full ratchet converts all prior preferred shares at the new lower price.
• Founder dilution jumps by 15-25% beyond normal round dilution.
• Broad-based weighted average limits additional dilution to 3-10%.
• Narrow-based weighted average falls between the two at 8-15%.
The math matters because down rounds are not rare. Roughly 20-25% of priced rounds in 2023-2024 were down rounds. Late-stage companies saw median valuation declines of 30-50% from 2021 peaks. Learn how investors evaluate risk at every stage before these clauses activate.
What to Negotiate Before Signing
• Insist on a broad-based weighted average. This is the NVCA model default. If your investor proposes full ratchet, treat it as a red flag. Only 1-2% of current deals use full ratchet, typically in distressed situations.
• Verify standard carve-outs exist. Your anti-dilution clause should exclude employee option pool shares, acquisition-related issuances, strategic partner equity, and debt conversion shares from triggering adjustments.
• Propose pay-to-play. This provision requires existing investors to participate in future rounds to keep their anti-dilution protection. Only 5-10% of deals include it, but it is the strongest founder protection against passive investors.
• Model a 50% down-round scenario. Before signing, run the numbers on your cap table. See exactly how much additional dilution each type creates.
• Compare the formula to the NVCA model. The standard broad-based formula uses total shares outstanding on an as-converted basis. Any deviation deserves scrutiny from your legal counsel.
Negotiation Leverage by Scenario
Scenario | Your Leverage | Recommended Action | Priority |
Multiple term sheets in hand | High | Push for broad-based WA plus pay-to-play | Remove the full ratchet entirely |
Single interested investor | Low | Accept broad-based WA, negotiate carve-outs | Protect the option pool from triggers |
Strong traction and metrics | High | Counter with a pay-to-play provision | Limit anti-dilution scope |
Down market conditions | Low | Accept standard anti-dilution, focus on valuation floor | Avoid a full ratchet at all costs |
Existing investor follow-on round | Moderate | Propose pay-to-play for all participants | Align incentives for future rounds |
When to Walk Away
Most anti-dilution disagreements are negotiable. But certain combinations signal investor-unfriendly terms worth rejecting.
• Full ratchet combined with participating preferred and no pay-to-play.
• Anti-dilution that triggers on any equity issuance, including employee grants.
• Multiple liquidation preferences stacked with aggressive anti-dilution.
• No carve-outs for standard operational issuances.
These combinations create compound dilution that can reduce founder ownership below meaningful levels after a single down round. Understand how equity allocation decisions compound before accepting unfavorable terms.
Build your target list using a reliable investor database, so you negotiate from multiple options, not desperation. Founders who run parallel conversations hold stronger positions on every term sheet provision.
The Bottom Line
Anti-dilution protection is not the enemy. It appears in virtually every venture deal. The type determines whether it is a reasonable safeguard or a punitive mechanism. Accept a broad-based weighted average, reject full ratchet, propose pay-to-play, and model the downside scenario before signing.
The founders who protect their cap tables are the ones who understand exactly what each clause costs them.
SheetVenture helps founders compare term sheet provisions across active investors so every negotiation starts with data, not guesswork.
Last Update:
Mar 12, 2026
