Ownership After a Funding Round:How to Calculate It
Ownership after a funding round in four steps: the investor's share, the pool, the stack and the exit waterfall. Run them before you reply to any offer.
To calculate your ownership after a funding round, divide the investment by the post-money valuation to get the investor's share, then multiply everyone else's share by one minus that fraction. Then add the pool, convert every convertible, and repeat for the next round.
How to calculate your ownership after a funding round, in four steps
You don't need financial modelling skills. You need four calculations and the discipline to run them before you form an opinion, not after.
Most people do it backwards. They read the term sheet, feel excited or insulted, and only then open a spreadsheet to confirm the feeling. By then the number is decoration.
Flip it. Numbers first. Opinion second. Every time.
Here's the whole toolkit for ownership after a funding round on one page, then we go through each step.
| Step | The question | The move |
|---|---|---|
| One | What does the investor own? | Investment divided by post-money valuation. |
| Two | What does the pool cost me? | Work it twice: after the money, then before. Compare. |
| Three | What have I already sold? | Convert every SAFE and note together, at its own cap or discount. |
| Four | What do I get at an exit? | Run the preference waterfall at three prices. |
Four lines. That's the method.
Step one: the investor's share, and what it does to yours
The investor's ownership equals the investment divided by the post-money valuation. That's it.
Everyone who held shares before is then multiplied by one minus that fraction. Say the investor ends up with a fifth. You keep four fifths of whatever you held before, not four fifths of the company. If you held all of it, you now hold four fifths. If you held half, you now hold two fifths.
That's the thing to internalise. Existing holders aren't each losing a fixed number of points. Each keeps the same proportion of a smaller share. Once that's instinctive, you can sanity-check any offer in your head, which matters, because the spreadsheet gives you precision but the instinct saves you in the room.
One trap sits right here. Which valuation is the number? Pre-money and post-money differ by exactly the size of the round, and that gap is a substantial share of an early business. When someone says "we're raising at ten", ask which. The reading you pick moves your ownership by several points. There's a full treatment in pre-money versus post-money explained.
Free guide · 25 pagesKnow the cost before you sign.The Dilution Playbook: what raising money actually costs you.Get the free guide →Step two: the pool, worked twice
This is where the real money is hiding, so do it twice and compare.
First pass: create the pool after the investment, as an extra issuance shared proportionally by everyone, new investor included. Note your percentage.
Second pass: create the same pool before the investment, carved out of the existing holders only. Note your percentage again.
The gap between those two numbers is what the pre-money convention costs you. Not as a principle. As a figure with your name on it.
That figure is what makes the conversation winnable. "I'd prefer the pool after the money" is a request. "This placement costs me this many points, and my hiring plan only needs this much" is an argument. Do the exercise once with real numbers and you'll never again treat the pool as a detail for the lawyers. The reasoning behind it is in what an option pool is.
Step three: convert the stack together
If you've never taken a convertible instrument, skip this. Then enjoy the fact that you can.
If you have, list every SAFE and note with its cap, its discount and its date. Apply each one's terms as written. Convert them all into the priced round at the same moment. Only then work out the new investor's shares and the pool.
People get this wrong in two predictable ways. They convert instruments one at a time in their head. Or they convert them at the round price instead of at their caps. Both understate the damage.
If several instruments carry caps well below your new valuation, together they can form a block larger than the round itself. Run it before you agree a price. Afterwards it's just a surprise with a signature on it.
Step four: your ownership after a funding round is not your payout
You can get every ownership figure right and still misjudge the outcome, because proceeds at an exit are paid down a stack before ordinary shareholders receive anything.
A one-times, non-participating preference means each preferred investor either takes their money back first, or converts to ordinary shares and takes their percentage, whichever is better for them. That's broadly reasonable. Participation means they take their money back and then also share in the remainder, which comes out of ordinary holders. Higher multiples raise the amount taken first.
Stack a few rounds of that and you get a price range, often wide, often the most likely one, where the business sells for a real sum and the founder receives very little.
So run the waterfall at three prices: a disappointing one, a plausible one and a good one. The disappointing one teaches you something. It's the one nobody models. What a liquidation preference is explains the mechanics.
Then do the part everyone skips: the next round
Everything above is your ownership after a funding round, for one round only. You need the path.
Model your ownership after this round and again after a plausible next one. A round that looks fine alone can sit on a path you'd never have accepted. And knowing where the path ends changes today's decision: raise more or less, take the higher valuation with worse terms or the lower one with cleaner terms, or skip the round.
Someone who models only the round in front of them is optimising one move at a time in a game that's scored at the end.
Free assessmentHow trapped are you, really?Take the Corporate Suffocation Index, the free solopreneur readiness assessment.Take the assessment →Keep one model and keep it current
Not four spreadsheets in three inboxes, each with a different assumption. One source of truth for who owns what, updated whenever anything changes.
Staleness kills a model faster than imprecision does. A stale model gets quietly distrusted, then bypassed, and then you're guessing again with a file open. The habit that prevents it is in how to keep a clean cap table.
Where the calculation usually goes wrong
Not in the arithmetic. The arithmetic is school-level. It goes wrong in what you feed it.
- Using the founding documents. Your ownership today is your fully diluted ownership, with every convertible counted. Not what the incorporation papers say.
- Trusting a number someone read out loud. If you haven't confirmed pre-money or post-money, you haven't got a number.
- Forgetting the pool. It lands on your side of the table unless you argue otherwise.
- Stopping at the good exit. Almost every term sheet looks fine at a great price.
Fix the inputs and the maths takes care of itself. Fix nothing and the maths will faithfully compute your mistake.
What the model is for, and what it isn't
Be careful with this tool. It's arithmetic applied to assumptions, and the assumptions are guesses. You don't know your next valuation, your exit price, your hiring pace or whether there will be a down round.
So never use it to predict. Use it to compare. This offer against that. This pool against a smaller one. Now against later. Raising against not raising.
That last comparison matters most for you. When you own all of it, the baseline is simple and strong. Every alternative has to beat it.
Free guide · 25 pagesKnow the cost before you sign.The Dilution Playbook: what raising money actually costs you.Get the free guide →Your half hour before you reply to any offer
- Confirm whether the stated valuation is pre-money or post-money.
- Find the pool size and which side of the money it sits on.
- List every instrument that converts because of this round.
- Model your ownership right after close, fully diluted.
- Model it again after a plausible next round.
- Run the waterfall at a disappointing, a plausible and a good price.
- Compare the result with your written walk-away.
That's the routine. How to model an investment offer before you respond expands it. Half an hour on your ownership after a funding round turns a negotiation you receive into one you have.
Free assessmentHow trapped are you, really?Take the Corporate Suffocation Index, the free solopreneur readiness assessment.Take the assessment →Frequently asked questions
What is the formula for ownership after a round?
The investor's share is the investment divided by the post-money valuation. Every existing holder then keeps their previous share multiplied by one minus the investor's fraction. Add the pool and any converting instruments, and recalculate.
Why do I need to work out the pool twice?
Because the same pool costs you different amounts depending on whether it is created before or after the investment. Calculating both shows the gap as a specific number, which makes it far easier to argue.
Do I need special software?
No. You need the four calculations for ownership after a funding round and one model that you keep current. What matters is running the numbers before you form an opinion, not the tool.
Is my percentage what I receive when I sell?
Not necessarily. Preference terms decide who is paid first, so your payout can be far below your percentage of the price. That is why you run the waterfall at a disappointing price as well as a good one.
The full method, with the checklists, is in The Dilution Playbook, a free 25-page playbook.
How trapped are you, really?
Take the Corporate Suffocation Index, the free solopreneur readiness assessment.