Equity dilution is the reduction in your ownership percentage when a company issues new shares. The arithmetic is simple: if you raise an amount equal to a quarter of your post-money valuation, every existing shareholder loses about a quarter of their percentage. A typical priced seed round dilutes founders by roughly 15 to 25 percent, a Series A by a similar amount again, and option pools add several points on top of each — which is how founders who started with 100 percent routinely end up in the 20 to 40 percent range by the time a hardware company reaches production scale.

This article is educational only. Projects House is an engineering firm, not a law, tax, or investment advisory firm; a startup attorney and an accountant should review your specific cap table and any round you are considering.

The Simple Math Behind Dilution

Dilution is not about shares changing hands — your shares are untouched. The denominator grows. If a company has one million shares and issues 250,000 new ones to an investor, there are now 1.25 million shares, and a founder holding 600,000 went from 60 percent to 48 percent.

The shortcut most founders use: dilution equals investment divided by post-money valuation. Raise $2 million at an $8 million post-money valuation and you sell 25 percent of the company; everyone existing keeps 75 percent of what they had. The distinction between pre-money and post-money is exactly where confusion and unpleasant surprises live — the details are in pre-money vs post-money valuation.

What matters is not the percentage but the value of your remaining stake. Owning 40 percent of a company worth $50 million is a far better outcome than owning 90 percent of one worth $2 million. Dilution is a cost, not a defeat — the question is always whether the money buys more value than the percentage it consumes.

Where Dilution Actually Comes From

Founders tend to count only the investment rounds. There are five sources, and the quiet ones add up.

  • Priced equity rounds. The obvious one, and usually the largest single step.
  • The employee option pool. Investors typically require a pool of 10 to 15 percent for future hires. If it is created pre-money, existing shareholders bear the entire dilution and the effective valuation you received is lower than the headline. Post-money creation shares it. This is negotiable and frequently under-negotiated. How the pool works for the people receiving it is covered in employee stock options at a startup.
  • Convertible instruments from earlier. SAFEs and notes are invisible on the cap table until they convert, then all of them convert at once, usually at the priced round. Founders who raised several uncapped or generously capped instruments are often startled by the combined effect — see SAFE vs convertible note.
  • Advisor and consultant equity. Individually small, collectively meaningful, and rarely tracked with discipline.
  • Anti-dilution adjustments. If you raise a down round, investor protections re-price earlier shares, and that adjustment comes entirely out of common stock — founders and employees. The clause variants are explained in our term sheet guide.

You cannot see any of this clearly without a maintained cap table; our guide to what a cap table is covers how to keep one that actually reflects reality.

How to Plan for Dilution in Advance

Model the whole path, not the next round. Sketch out the rounds you expect to need to reach profitability or acquisition — seed, Series A, possibly a bridge — with rough amounts and valuations, and calculate where your ownership lands. Hardware companies typically need more capital than software companies at the same revenue, because tooling, inventory, and certification all consume cash before a single unit ships.

Two disciplines follow from the model:

Raise against milestones, not against comfort. Money raised before a value-creating milestone is the most expensive money you will ever take, because the valuation reflects what you have proven so far. A working prototype, a passed certification, or a signed pilot customer moves the valuation more than another six months of runway does. Sequencing the raise so each round follows a demonstrated result is the single biggest lever on total dilution.

Do not raise dramatically more than the milestone requires. Excess capital raised early is bought at the lowest valuation you will ever have. But raising too little is worse — a company that runs out of runway three months before a milestone raises from weakness, on terms far more dilutive than the money it saved.

Reducing Dilution With Non-Equity Capital

Every dollar that does not come from selling shares is a dollar of ownership retained. For hardware companies in the US, several routes are genuinely available:

  • Federal grants. SBIR and STTR awards fund research and development without taking equity, and for a hardware company they can cover a meaningful share of early engineering. See our guide to the SBIR grant application.
  • Pre-orders and crowdfunding, where customers fund production directly — covered in crowdfunding a product launch.
  • Revenue from adjacent work, such as engineering services or a pilot deployment, which is slow but entirely non-dilutive.
  • Purchase order and inventory financing once you have real orders in hand — see purchase order financing.

These are not free: grants take time to win and carry reporting obligations, and pre-orders create delivery commitments that are unforgiving in hardware. But they buy time at a fraction of the ownership cost.

Common Mistakes Worth Avoiding

  • Optimizing for percentage instead of value. Refusing a round to protect ownership in a company that then stalls is a bad trade.
  • Ignoring the pool placement. A pre-money option pool can cost several points of ownership that a single negotiated sentence would have shared.
  • Stacking convertible instruments without modeling conversion. Run the numbers before signing the fourth SAFE, not after.
  • Giving away large early equity for small contributions. Advisor grants of several percent, unvested and unearned, are regretted more often than any other early decision.
  • Treating a down round as unthinkable. They happen; understanding your anti-dilution exposure before you need to is much cheaper than discovering it during one.
  • Letting the cap table drift. Cleaning up an inaccurate cap table during diligence delays closings and occasionally kills them.

The Practical Takeaway

Dilution is the price of capital, and the way to pay less of it is to need less of it at each stage and to be worth more when you ask. For a physical product, that almost always means getting to a demonstrable, cost-credible prototype efficiently — because that artifact, more than any narrative, is what moves a valuation.

Projects House develops physical products efficiently and predictably, which is what lets founders raise later and at a higher valuation than they otherwise could. If you want to reach a fundable milestone without burning capital getting there, send us your project details through our contact form.