Reviewed by Finin2min Editorial Desk · Last reviewed 11 August 2026
Build a simple cap table, calculate current ownership and model a new share issue.
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Convertibles, SAFEs, preference rights and anti-dilution need a fully diluted legal model.
Holder
Shares
Pre %
Post %
How This Is Calculated
This calculator tracks ownership percentage for each shareholder before and after a new share issuance — pre-money ownership is each holder's shares divided by total pre-issuance shares; post-issuance, everyone's percentage dilutes proportionally as new shares are added to the total share count, even though their absolute share count stays the same.
Frequently Asked Questions
Why does everyone's ownership percentage drop when new shares are issued, even if they don't sell anything?
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Because ownership percentage is shares held ÷ total shares outstanding — issuing new shares increases the denominator (total shares) without changing any existing holder's numerator (their own share count), so everyone's percentage mathematically dilutes even though their absolute holding is unchanged.
Does dilution mean existing shareholders lose value?
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Not necessarily — if the new investment is at a fair valuation and used productively, the smaller percentage of a (hopefully) larger, more valuable company can still mean the same or greater absolute value for existing shareholders, even though their ownership percentage decreased.
Confirm the current, in-force text governing Cap Table Ownership and New-Issue Calculator on the official source linked above - the summary on this page is an implementation aid, not a substitute for it.
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Before relying on this page
This page is a structured implementation summary, not the operative legal text. Portal or process acceptance of a filing does not by itself establish legal compliance - the underlying classification, authority, evidence and timeline still have to be independently correct. Where the facts are contested, high-value, or time-barred if delayed, verify the current position with the official source and, where appropriate, a qualified professional before acting.
Scope: Models ownership percentages across founders, employees (ESOP pool) and investors on a company's capitalisation table, including the dilution effect of a new funding round.
Calculation logic
Pre-money ownership percentage for each stakeholder = Their share count ÷ Total pre-round share count.
New investor shares issued = New investment amount ÷ Price per share (derived from the entered pre-money valuation ÷ pre-round fully diluted share count).
Post-money ownership percentage for each existing stakeholder = Their unchanged share count ÷ New total share count (pre-round shares + newly issued investor shares + any new ESOP top-up shares).
Dilution for each existing stakeholder = Pre-round ownership % − Post-round ownership %.
Inputs and assumptions
Uses the standard fully-diluted share count convention (including outstanding options/ESOP pool) for price-per-share calculations, consistent with typical Indian/global venture financing practice.
Assumes a single funding round is being modelled per calculation; sequential rounds require running the calculator iteratively, carrying forward each round's post-money cap table as the next round's pre-money.
Exclusions and edge cases
Does not model liquidation preferences, anti-dilution ratchets, or convertible note conversion mechanics unless those inputs are separately provided — this is a straightforward priced-round dilution model.
Option strike price and vesting schedule for the ESOP pool are outside the scope of this ownership-percentage calculation.
Sources
No external regulatory source applies — this is a general financial formula, not a statutory computation.
Review status: reviewed and approved by CA Nikhil Gupta on 17 July 2026.
Guides that use this calculator
Background, worked examples and the rules behind these numbers.