Image: Alaur Rahman
Most first-time founders want to know how to raise money. Very few really know what each type of money will cost them, beyond equity. Every source of funding comes with a personality: a pace it expects you to move at, a kind of proof it wants to see, and an ending it assumes you are working towards.
For example: Take venture capital money and you have agreed, whether you said it out loud or not, to try to build something that can be eventually sold for a very large number relatively fast. Take a loan and nobody cares about your exit, but you owe the money whether or not the business works.
Neither is better. They are different deals with different demands, and choosing the wrong one is one of the most expensive mistakes a first-time founder can make.
Here is what each type of money actually costs you.
Customer revenue
What it needs from you: A willingness to sell before you feel ready, and to build only what someone will pay for.
The proof it needs: None, other than a customer who opens their wallet.
What it costs you: Speed and scope. You can only grow as fast as your margins allow, and you will have to say no to things you would like to build. In exchange you keep every share and every decision, and you learn faster than any funded competitor, because your feedback loop is money changing hands rather than an investor’s opinion.
This is also the only kind of funding that also validates the business. Everything else on this list is someone betting that customers will show up later.
Friends and family
What it needs from you: The maturity to treat it like real investment even though it does not feel like one.
The proof it needs: That they trust you. That is usually all.
What it costs you: The relationship, if it goes wrong (and it often does). The money is emotionally expensive in a way that shows up years later. Practically, it also costs you cap table hygiene. A messy, undocumented friends and family round with vague promises attached is something investors will make you clean up before a proper round, and cleaning it up means an awkward conversation with someone who loves you.
If you do take it, paper it properly: price it or use a simple instrument, and make sure everyone understands they may lose all of it.
Grants
What it needs from you: Patience, and the ability to write well.
The proof it needs: A well-defined project with technical or innovation merit, a plan, a budget. Grant bodies fund projects, not companies. Many will also only cover part of the cost, so you need to find the rest yourself, and some require you to apply jointly with a university or another company rather than on your own.
What it costs you: time and shape. Applications take weeks, decisions take months, and the money arrives against milestones and often in arrears, which means you need cash to spend before you get reimbursed. The subtler cost is that grants pull your roadmap towards what is fundable rather than what your customers want. Founders end up building the grant project instead of the business.
The upside is real, though: it is non-dilutive. You give up no equity and no control. For deep tech and research-heavy companies, Innovate UK funding can be the difference between existing and not.
Loans, including the Start Up Loans scheme
What it needs from you: Confidence that you can service the debt, and a business that produces cash reasonably soon.
The proof it needs: A credit score and a plan. Not vision, not a huge market, not the promise of a big exit. Nobody in a lending conversation cares whether you can be a unicorn.
What it costs you: Personal risk. The government-backed Start Up Loans scheme offers £500 to £25,000 per person, up to £100,000 per business, repayable over one to five years at a fixed rate, with twelve months of free mentoring. It is unsecured, so no one takes your house, but it is a personal loan rather than a company one. You owe it personally even if the company fails.
That is the whole trade. Debt is the cheapest funding in equity terms and the most dangerous in personal terms. It suits businesses with a clear path to revenue and does not suit a science project.
Angel investors
What it needs from you: Openness to being challenged, and someone worth backing as much as something worth backing.
The proof it needs: You. Angels at pre-seed are buying the founder’s insight, the evidence you have gathered from real customers, and the sense that you cannot stop working on this. Early traction helps, but it doesn’t have to be revenue.
What it costs you: Equity, some control, and the obligation to keep people informed. Also, a certain amount of theatre. You will spend months in conversations, most of which go nowhere. This is why getting the right angel is the most important thing.
In the UK there is a structural reason so much angel money shows up at the very beginning. The government gives investors a tax break for backing early-stage companies, through two schemes. The first is SEIS, which covers the first £250,000 your company ever raises this way. Investors in that round get half of what they put in back off their income tax bill. Once you have taken that £250,000, SEIS is done for your company, permanently.
After that comes EIS, the same idea for slightly later companies. The break is smaller, 30% rather than 50%, because you are a (presumably) safer bet by then. The amounts are much larger: since 6 April 2026 a company can raise up to £10m a year under EIS and £24m across its lifetime, with higher figures again for research-heavy companies.
There is also a limit on the investor’s side, and it is separate from the company’s. One person can put up to £200,000 into SEIS companies in a tax year and claim the relief on it, spread across as many companies as they like. This is why SEIS rounds usually have several angels in them rather than one. It is also why it’s unlikely that one angel will be doing your entire first round alone.
The catch is timing: To qualify for SEIS your company must have gross assets under £350,000 and fewer than 25 full-time equivalent employees when the shares are issued, and the trade itself must not have been going for more than three years (which is not a company’s founding birthday by the way, it’s since it started making money).
What this means in practice: a lot of UK angel money is only available while you still qualify. Your SEIS window is short and can close quickly.
Equity crowdfunding
What it needs from you: A public story and a crowd that already likes you.
The proof it needs: A product people can understand in ten seconds, ideally consumer-facing. Plus, a lead investor or an existing community to create momentum.
What it costs you: money and exposure up front. You pay platform fees and marketing costs before you know whether the round will close, and a failed public raise is visible to everyone, including the investors you want next. You also end up with hundreds of shareholders, which is manageable through a nominee structure and irritating without one.
It works brilliantly for brands with fans. It works badly as a fallback when institutional investors have said no, and experienced investors can tell which one you are.
Venture capital
What it needs from you: Speed, relentlessness, and ambition that is genuinely uncomfortable.
The proof it needs: Evidence that this can become very large, very fast. A market that supports a company worth hundreds of millions. A team that can execute at pace. Traction that is growing on a curve, not a line.
What it costs you: The option of a slow, modest, happy outcome.
This is what first-time founders don’t really understand. VC funds are built to return the whole fund from a handful of investments, which means your investors need your company to be one of those or it may as well be zero to them. A business that grows steadily and sells for £15m is a good life outcome for a founder and a bad investment for a VC fund. Once you take venture money, you have signed up to swing for something much bigger, and the pressure to do so will shape every decision after that, including whether you are allowed to sell when you want to.
You also give up equity, board control over time, and a degree of freedom. Preference terms mean investors get paid before you do. Future rounds dilute you further. None of this is a scandal, it is the deal, but you should take it knowing what you have agreed to rather than discovering it at the exit.
So which one should you take?
Work backwards from the ending you actually want.
If you want a profitable business you own and run for the next decade, venture capital is the wrong instrument and no amount of enthusiasm can change that.
If you are building something that only works at enormous scale and needs years of losses to get there, revenue and loans will not get you there and you should stop pretending otherwise.
If you are in the research phase, grants buy you time without costing you ownership.
Most UK founders end up mixing: a grant for the technical work, SEIS angels for the first hires, revenue for as long as possible, and VC money only when the shape of the business genuinely demands it, because scaling it hard is the only way to keep going.
The one thing you should not do is take the first money offered because it is the first money offered. That is how founders end up on a treadmill they never chose, running at a pace set by someone else, towards an exit they did not want.
See what each choice does to you before it is real
Reading about dilution and pressure is one thing. Watching your own cap table shift, round by round, while the decisions get harder, is another.
That is what I built the Lumni Play: The Idea-to-Exit Simulator for. You play a founder from the first idea to the exit, choosing what money to take and what to give up, and you see where each choice leads without any of it costing you a company. It is free, it runs in the browser, and there is no signup: play.lumni.work.
FAQ
What are the main types of startup funding in the UK?
Customer revenue, friends and family, grants, loans including the government-backed Start Up Loans scheme, angel investment under SEIS and EIS, equity crowdfunding, and venture capital. Each demands different proof and carries a different cost beyond the money itself.
Is it better to take a loan or give away equity?
It depends on how quickly your business produces cash. Debt is cheaper in ownership terms but you repay it whether or not the business succeeds, and Start Up Loans are personal loans, so the liability is yours. Equity costs you ownership and control and carries no repayment obligation if things fail, but it does ask for speed and relentlessness.
How much equity should I give away in a first round?
There is no single right answer, but giving away a very large share early tends to cause problems later, because every subsequent round dilutes you further and investors want the founding team to stay motivated. Model the full path to your likely exit before you agree to anything.
Do I have to aim for a big exit to raise investment?
For venture capital, effectively yes. Funds need a small number of very large outcomes to return their fund. Angels can be more flexible, and grants and loans do not care about your exit at all.
What is SEIS and why do UK angels care about it?
SEIS gives investors 50% income tax relief on investments of up to £200,000 per tax year in qualifying early-stage companies. A company can raise up to £250,000 in total, and must be under three years into trading with gross assets below £350,000. It significantly reduces an angel’s downside, which is why so much UK angel money concentrates at that stage.
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