This looks like a values question — generosity, fairness, how much to give away — but it's really a math problem about which currency is cheaper for the specific thing you're buying. Cash and equity aren't two prices for the same product. They buy two different things, and confusing them is how founders overpay by a mile without noticing.
What each one actually costs you
The one question that usually decides it
Are you buying a build, or recruiting a co-owner? If you know what you want made and you mostly need skilled hands to make it, that's a build — and a build is a cash transaction. If what you actually need is someone to own the technical side of the company for years, share the risk, and keep going when it's hard, that's a partner — and partners are paid in equity. Trouble starts when people pay equity prices for a build, or expect partner-level commitment from a cash contractor.
- 1Ask if you can fund it. If you can pay for the build without betting the mortgage, and it's a defined project, lean strongly toward cash and keep your ownership.
- 2Ask what you actually need from this person. A finished v1, or a long-term technical partner? Be honest — wanting company on a scary journey isn't the same as needing a co-founder.
- 3Price the equity in real terms. "20%" isn't small. Imagine the company works and sells: would you rather have written a check once, or handed over a fifth of that outcome? Sometimes yes, often no.
- 4If you go equity, make them a real partner. Vesting, a written agreement, IP assignment, and clear roles. Equity without protections is the most dangerous version of this choice.
- 5If you go cash, still control the assets. Domain, repos, and accounts in your name, a defined scope, and payment tied to milestones.
The most common expensive mistake: giving away a third of the company to dodge a bill you could have paid. Equity feels free because no money leaves your account today. It isn't. It's the priciest money you'll ever spend, and you spend it exactly when the company finally wins.
Run the numbers once, out loud
Do this exercise before you decide. Picture the company three years out and doing well. If you paid cash for the build, you own all of it and the money you spent is a distant memory. If you gave a developer 25% to avoid that build cost, a quarter of the success belongs to someone whose main contribution was version one, years ago. Now run the other branch: the company stalls. The cash is gone, but so is the risk of someone owning part of a business you are still grinding on alone. Neither outcome is automatically better — but seeing both, in your own numbers, turns a vague worry into a decision you can actually make.
The hybrid most people overlook
It's rarely all-or-nothing. Some cash plus a small equity stake is often the strongest structure — even below-market pay creates accountability and a reason for the builder to prioritize your project, while a modest stake keeps their upside tied to yours. You give up far less ownership than a pure-equity deal, and you get more commitment than a pure-cash one. If you can scrape together even a partial budget, a cash-heavy hybrid usually beats both extremes.
A quick gut check
- Lean toward cash if you can fund the build without real pain, the work is well-defined, and you don't want a permanent co-owner in the business.
- Lean toward equity if you can't pay what the work is worth, you genuinely want this person betting alongside you for years, and the build sits at the center of the whole company rather than being a one-off task.
- Lean toward a blend if you have some budget and want both accountability and a partner's commitment without giving up a large stake.
When the honest answer is 'neither, yet'
If you can't fund it and you can't yet make the case for a partner to bet on you, the answer isn't to force one of the two. It's to make the idea real enough to change the math — a landing page with signups, a handful of customers who've said they'll pay, a clickable mock. With even a little proof, cash gets cheaper because the risk drops, and equity gets cheaper because a good partner needs less of the company to say yes. Do that groundwork first, and this decision gets a lot easier.
And if you'd rather not choose in the abstract, there are build partners who work for a fee, for equity, or a blend of the two — which lets you match the currency to your situation instead of committing to one before you know what the work really requires.
Common follow-up questions
Isn't equity smarter because I keep my cash for other things?
Only if you truly can't spare the cash, or you genuinely want this person as a partner. Otherwise you're financing a build with the most expensive money there is. A percentage of a successful company is worth vastly more than the invoice you avoided. Keep cash for things equity can't buy, but don't reach for equity just because paying nothing today feels comfortable.
How do I know if the equity I'd give up is a good deal?
Run the outcome in your head. If the company works and exits, would you be glad you traded that slice, or would you wince? Then check the downside: if it stalls, are you comfortable that this person owns part of it permanently? Equity is a good deal when the builder is a true partner who makes success more likely — not when it's a way to make a bill disappear.
Can I start with cash and bring on a partner later?
Often that's the cleanest path. Pay for the first version, get some traction, then recruit a technical partner from a position of strength — when the equity you trade is worth more to them and costs you less of the company. Building proof first lowers the price of everything that comes after it.
Want this answered for your exact situation?
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