Startup Valuation at Pre-Seed and Seed: How UK Founders Set a Number

Ask a first-time founder how they reached their valuation and you often get a number with no working behind it. At pre-seed and seed, that is not unusual, because early valuation is not a discounted cash flow exercise. There are no years of revenue to model, no margins to defend, and often no product in the market yet. What you are really doing is agreeing a price for a slice of something that mostly exists as a plan, a team and a market opportunity. This guide explains how UK founders set that number in practice, where the SEIS and EIS rules push it, and how to avoid the trap of asking for too much.

Why early-stage valuation is not a DCF exercise

Discounted cash flow values a business on the cash it will throw off in future. That works for a company with a track record. A pre-seed startup with three people and a prototype has no reliable cash flows to discount, so any DCF you build is a spreadsheet dressed up as a fact. Investors know this, which is why they rarely ask for one at this stage.

Instead, an early valuation is negotiated around a handful of inputs. The strength and credibility of the founding team. Any traction you can show, even small signals like a waiting list, a paid pilot or early revenue. The size of the market you are chasing. How much you are raising and how much of the company you are willing to give up. And how many investors are competing to get into the round. In the UK there is one more input that genuinely shapes the deal: whether the round qualifies for SEIS and EIS tax relief.

Pre-money versus post-money

Two terms decide who owns what, so get them straight before any conversation. Pre-money valuation is what the company is worth before the new investment lands. Post-money valuation is the pre-money figure plus the cash you raise. If your pre-money is £2m and you raise £500,000, the post-money is £2.5m, and the new investors own £500,000 divided by £2.5m, which is 20%.

The detail that catches people out is whose ownership the dilution comes from. When investors quote a valuation, confirm whether it is pre-money or post-money, and confirm whether any option pool for future hires is being created out of the pre-money (which dilutes you, the founder) or out of the post-money (which spreads the pain). A “£3m valuation” can mean very different splits depending on those two points.

The dilution maths founders actually use

Most UK seed rounds settle inside a familiar band of dilution. Founders typically give away somewhere around 10% to 20% of the company per priced round, with 15% to 25% common at seed depending on how much is raised relative to the valuation. This is the lens experienced investors use, and it is worth using too because it works backwards from a sensible outcome rather than forwards from an ego number.

Founder working out dilution and ownership percentages by hand — Work the valuation backwards from how much you need and the share you are willing to sell.

The method is simple. Start with how much money you need to hit the next meaningful milestone, usually 18 months of runway plus a buffer. Decide what share of the company is reasonable to sell to raise that, say 15% to 20%. Then the post-money valuation falls out of the arithmetic: raise amount divided by target ownership equals post-money. If you need £600,000 and are comfortable selling 18%, your post-money is roughly £3.3m and your pre-money is about £2.7m. The valuation is the output, not the starting point.

This is why investors describe their approach as target-ownership or dilution-led. A fund that needs to own, for example, 10% to make the position worth its time will size its cheque and the valuation to land there. Knowing this lets you negotiate on terms you both understand rather than haggling over an abstract figure.

Comparables and benchmarks

The other reality check is comparison. Investors look at what similar UK companies at the same stage, sector and traction level raised at recently. If software startups like yours are pricing seed rounds in a given band, sitting far above it needs a clear reason, such as a standout team or unusual early traction. Benchmark data from cap-table and funding-tracker sources moves with the market, so treat any single figure as a snapshot rather than a rule.

How angels actually value pre-revenue startups

Angels investing at pre-seed often use rougher frameworks designed for companies with no revenue to model. Two come up again and again, and it helps to recognise them across the table.

The Berkus method, developed by angel investor Dave Berkus, assigns value to risk reduction rather than projections. It credits the startup for up to five factors: a sound idea, a working prototype, the quality of the management team, strategic relationships, and early traction or sales. Each factor carries a capped value, building to a pre-revenue ceiling. The point is not the exact figure; it is that progress on each front lifts the number, so shipping a prototype or signing a pilot genuinely changes your valuation.

The scorecard method, associated with angel investor Bill Payne, starts from the average pre-money valuation for recently funded startups in the same region and sector, then adjusts up or down using weighted factors such as team strength, market size and competitive position. It is essentially comparables with a structured weighting on top. Both methods tell you the same thing: at this stage you are being priced on team, evidence and market, not on a forecast.

How SEIS and EIS shape the angel-stage number

In the UK, two tax schemes sit underneath most angel and early-stage deals, and they quietly influence valuation. Under the Seed Enterprise Investment Scheme, a company can raise a maximum of £250,000 in total through SEIS, and the shares issued must be full-risk ordinary shares that are not redeemable and carry no special rights to assets, according to HMRC’s guidance. The company must also be young, broadly with the qualifying trade carried on for no more than three years, with fewer than 25 full-time equivalent employees and gross assets of no more than £350,000 when the shares are issued. You can read the official detail in HMRC’s SEIS guidance on GOV.UK.

Tax scheme paperwork on a desk in a London co-working space — SEIS and EIS advance assurance makes angel money more attractive and strengthens your hand on price.

Why does this touch valuation? Because SEIS makes angel money far more attractive, it widens the pool of people willing to back you and can support a firmer valuation than the same company would get without it. The ordinary-shares rule also matters: SEIS investors cannot take the preference shares that institutional VCs often want, so early angel rounds tend to be clean ordinary-share deals. And the £250,000 cap means SEIS rarely funds a whole round on its own; founders typically stack SEIS and then the Enterprise Investment Scheme (EIS) for the larger portion. GOV.UK sets out both schemes side by side in its guidance on using a venture capital scheme to raise money for your company.

The practical move is to get SEIS and EIS advance assurance from HMRC before you pitch. Telling angels the round is “SEIS and EIS eligible, advance assurance applied for” removes a major objection and strengthens your hand on price. If you are still mapping out how a round comes together, our wider London startup and fundraising coverage walks through the surrounding pieces.

SAFEs, ASAs and valuation caps: deferring the number

Sometimes the cleanest move is not to fix a valuation at all yet. Convertible instruments let you take money now and set the price later, when a priced round gives a clearer benchmark.

A SAFE (Simple Agreement for Future Equity) is an investment that converts into shares at a future priced round rather than buying shares today. It usually carries a valuation cap, the maximum valuation at which the investor’s money converts, and sometimes a discount. The cap protects the early investor: if the next round prices higher than the cap, they still convert as if the company were worth the cap, rewarding them for backing you early. SAFEs are widely used at pre-seed because they are quick and cheap to paper.

In the UK there is a complication worth flagging. A plain SAFE can sit awkwardly with SEIS and EIS, because those schemes require investors to receive qualifying ordinary shares within a set window. Many UK founders instead use an Advanced Subscription Agreement (ASA), which is structured so investment converts into shares within the timeframe SEIS and EIS allow, keeping the tax relief intact. Take proper advice on which instrument fits your round, because the wrong one can quietly disqualify your angels from the relief they expected.

Realistic 2026 UK valuation ranges, as broad bands only

Any precise figure here would be misleading, because valuations move with the market, the sector and the specific company. As broad context only, recent UK pre-seed rounds have often priced in the low single-digit millions of pounds pre-money, with seed rounds for companies showing early revenue typically a step above that. Software and AI companies tend to sit at the higher end of their stage; capital-heavy or pre-product companies sit lower. Treat these as bands, not targets, and always pressure-test against current comparables for your exact niche rather than a headline average.

Red flags of over-valuing

The most expensive mistake at this stage is pricing too high. A valuation that looks like a win today can hurt you later.

You raise the bar you then have to clear. A high seed valuation sets the floor for your Series A. If you do not grow into it, you face a flat or down round, which is hard to sign and damaging to morale.
You shrink your investor pool. Price above what the market will bear and experienced angels and funds simply pass, leaving you chasing money from people who do not understand the risk.
You signal inexperience. A number with no reasoning behind it tells investors you have not done the work, which colours everything else in the pitch.
You over-dilute later. Squeezing maximum valuation now to avoid dilution often backfires, because a stalled raise or a down round dilutes you far more than a sensible price would have.

A slightly conservative, well-justified valuation that closes the round quickly is almost always better than an aggressive one that drags or collapses. Momentum is itself a form of value at this stage.

Frequently asked questions

Is pre-money or post-money valuation more important?

Both matter, but always confirm which one an investor is quoting, because the same headline figure produces different ownership splits. Post-money is pre-money plus the cash raised, and the new investor’s percentage is their cheque divided by the post-money. Also check whether any option pool comes out of the pre-money, since that dilutes founders specifically.

How much of my company should I expect to give away at seed?

As a working rule, founders commonly part with around 10% to 20% per priced round, with 15% to 25% typical at seed depending on how much is raised against the valuation. Rather than fixing a valuation first, decide how much you need and what share is reasonable to sell, then let the valuation fall out of that arithmetic.

Does SEIS limit my valuation?

Not directly. SEIS caps the total a company can raise through the scheme at £250,000, and requires ordinary shares with no special rights, but it does not set your valuation. In practice it tends to support a firmer number, because the tax relief makes angel investment more attractive and widens the pool of people willing to back you early.

Should I use a SAFE or an ASA in the UK?

Many UK founders favour an Advanced Subscription Agreement because it is structured to convert into shares within the window SEIS and EIS require, preserving the tax relief that angels expect. A plain SAFE can sit awkwardly with those schemes. Take legal and tax advice on which instrument fits your specific round before signing anything.

What is a valuation cap and why does it matter?

A valuation cap is the maximum valuation at which a convertible investor’s money turns into shares at the next priced round. It rewards early backers: if the priced round values the company above the cap, they convert as though it were worth only the cap, getting more shares for their money. It lets you defer setting a firm valuation while still giving early investors a fair deal.

What should I do before pitching investors on valuation?

Apply for SEIS and EIS advance assurance from HMRC, gather comparables for your stage and sector, and work your number backwards from how much you need and the dilution you can accept. Walking in with a justified figure and tax-scheme eligibility in hand strengthens your position far more than a high headline ask with no reasoning behind it.