A fundraising guide for founders

Raising money, stage by stage — what it’s for, when to do it, and how. Last updated June 2026.

Money is fuel, not the engine. It’s easy — especially in your first company — to treat a funding round as the finish line: the press release, the validation, the thing that makes you a real startup. It isn’t. A raise is a means to an end, and the end is a product that people want so badly they tell their friends. Get that and the money becomes easy; skip it and no amount of money will save you.

This is a short, opinionated guide, leaning heavily on Paul Graham and the Y Combinator canon, and on Eric Ries’s The Lean Startup. It’s written for a founder somewhere on the road from idea to growth, who wants the shape of the whole thing before getting lost in any one part. When you’re ready for names and contacts, the companion page is the directory of funding sources.

Make something people want

Y Combinator prints it on the t-shirts for a reason. Almost every fatal startup problem is a symptom of this one: you built something nobody wanted badly enough. Investors are pattern-matchers, and the pattern they want most is a small number of users who love you — not a large number who think you’re fine. It is better, as Graham puts it, to have 100 people who love you than a million who sort of like you.

Startups take off because the founders make them take off… The most common unscalable thing founders have to do at the start is to recruit users manually. Paul Graham, Do Things That Don’t Scale

The discipline that gets you there is the build–measure–learn loop from The Lean Startup: ship the smallest thing that tests your riskiest assumption, measure how real people react, learn, and go again. Speed around this loop — not the size of any single release — is the engine of an early startup.

The build–measure–learn loop. The startup that spins it fastest — cheaply, with real users — finds product–market fit first. Funding buys you more turns of the loop; it doesn’t replace them.

The practical upshot for fundraising: the best time to raise is when you have traction or a credible reason to believe it’s coming. Money raised against love — engaged users, revenue, a waitlist that won’t stop growing — is cheap and quick. Money raised against a slide deck alone is slow and expensive, when it’s available at all.

The stages, and what to raise at each

Each tier of investor is calibrated to a different level of risk and proof. Ask the wrong tier and you waste everyone’s time: a Series A fund can’t write a first cheque into a pre-team idea, and an accelerator can’t lead your growth round. Match the source to where you actually are.

Indicative cheque sizes only — rounds vary enormously by sector and market. The point is the shape: each step needs more proof than the last, and a different kind of investor.

Idea / pre-team. Bootstrap, friends and family, grants, and accelerators or talent investors like Entrepreneur First. The thing you’re raising most is conviction and a co-founder, not cash. Non-dilutive grants and R&D credits go a long way here.
Pre-seed (first cheque). Angels, syndicates and SEIS funds, and pre-seed VCs. Sell the team and the insight. SEIS/EIS advance assurance makes you materially easier to back in the UK.
Seed. Seed VCs and the better angels. Now you need early traction — users, retention, a sliver of revenue — and a story about why it compounds.
Series A. Institutional VCs. The bar is a repeatable model: numbers that go up for a reason you can explain and reproduce with more money.
Growth and beyond. Growth funds, corporate and strategic investors, and increasingly venture debt alongside equity to extend runway without more dilution.

You don’t have to climb every step, and many of the best companies skip or delay them. The ladder is a map of who expects what — not a schedule you owe anyone.

Default alive

Graham’s single most useful question for a startup that is spending more than it earns: given your current growth and burn, do you reach profitability on the money you already have? If yes, you’re default alive. If no, you’re default dead, and you should know which one you are at all times — founders are routinely, dangerously optimistic about it.

Same starting cash, two futures. Default-dead burns straight to zero; default-alive dips through a trough as growth outruns burn and turns up before the money’s gone. Raising money buys runway — but only growth changes which curve you’re on.

Why it matters for fundraising: raise when you’re strong, not when you’re desperate. A default-alive company raises from a position of leverage and can walk away from a bad deal. A default-dead company with eight weeks of cash is negotiating with a gun to its own head. Keep enough runway that you’re always raising the next round, never this month’s payroll. Eighteen months is a common target; less than six is an emergency.

Raising money is a process

When you do raise, treat it as a sales process with you as the product — run in parallel, time-boxed, and worked in order of warmth. A few principles make it tractable:

Match the source to the stage. Use the ladder above. Asking the wrong tier wastes everyone’s time and burns goodwill you may want later.
Warm beats cold, every time. The best introduction is from a founder the fund has already backed. Map your network against each fund’s portfolio before you send a single cold note.
Build a pipeline, not a broadcast. Put names in a tracker with columns for stage fit, thesis fit, warm-intro path, status and next step. Aim for 30–60 well-matched targets, not 300 random ones.
Run it in tiers and in parallel. Open with a handful of friendly, lower-stakes names to sharpen the pitch; save your top-choice funds for once the story is tight. Talk to many at once so you can create a real deadline — investors move when they fear missing out.
Have the materials ready before you reach out: a short deck, a one-line and one-paragraph blurb, a data room, and a clear ask — how much, for what, on roughly what terms.
Non-dilutive first where it fits. Grants, R&D credits and the Start Up Loans scheme give you cash or equity-free runway — stack them alongside equity rather than instead of it.

A fundraising funnel converts like a sales funnel: most targets never become meetings, most meetings never become offers. That’s why you start with dozens, not the three funds you’ve heard of — and why one “no” means almost nothing.

Useful directories for warm-intro paths and fund theses: OpenVC, Landscape, the UK Business Angels Association and the BVCA member directories. For the names themselves, work from the funding-sources directory.

Worked examples

Three stories founders cite for a reason — each makes one of the ideas above concrete.

Do things that don’t scale

Airbnb’s founders, broke and ignored, flew to New York to photograph their hosts’ apartments by hand — and during the 2008 US election kept the lights on by selling novelty cereal, “Obama O’s” and “Cap’n McCain’s,” reportedly clearing around $30,000. Unscalable, manual, slightly absurd. It was also how they learned what guests actually wanted — the traction that got them into Y Combinator in early 2009 and, from there, to investors.

Sources: Paul Graham, Do Things That Don’t Scale; Airbnb’s own company history.

Test the riskiest assumption first

Before building the hard engineering, Drew Houston put out a roughly three-minute demo video showing Dropbox working. Posted to Hacker News and Digg, it reportedly drove the beta waiting list from about 5,000 to 75,000 people overnight. That signal — people want this enough to queue for it — was the cheapest possible turn of the build–measure–learn loop, and it de-risked everything that followed.

Source: Eric Ries, The Lean Startup (2011), recounting Houston’s MVP video.

Your users can be your investors

UK challenger banks turned fundraising into community-building. In 2016 Monzo raised £1m from its own customers on Crowdcube in 96 seconds — a record at the time — and went on to run some of Europe’s largest crowdfunding rounds. The capital mattered; the army of part-owners who evangelised the product mattered more.

Sources: Crowdcube; Monzo company blog.

Common mistakes

Raising to avoid building. Fundraising is seductive precisely because it feels like progress while sparing you the hard, ambiguous work of making something people want. It isn’t progress.
Optimising the valuation over the partner. The highest number can come with the wrong board member for the next eight years. Terms and people outlast the headline.
Raising too little or too much. Too little and you’re back on the road in three months; too much and you set a valuation you then have to grow into, with more dilution and more pressure.
Treating one “no” as a verdict. It’s a funnel. Most targets pass. Run enough of them in parallel that no single answer can sink you — or your morale.
Going quiet when it’s hard. Investors back lines that go up and founders who keep them informed. Silence reads as trouble.

Keep going

Nearly every founder you admire was, at some point, broke, doubted and a few weeks from the end. The ones who made it were rarely the smartest in the room; they were the ones who kept shipping, kept talking to users, and didn’t quit. Determination, more than brilliance, is what investors are really betting on — because it’s what actually predicts the outcome.

Startups are still very counterintuitive… The way to succeed in a startup is not to be an expert on startups, but to be an expert on your users and the problem you’re solving for them. Paul Graham, Before the Startup

Raise the money you need, from the people who’ll help you build it, and get back to the only thing that matters: making something people want. When you’re ready for the names, the funding-sources directory is your outreach list.