Startup valuation is what investors agree your company is worth when they buy in, and with no revenue to point at, it is the hardest number a founder sets. This guide covers how pre-revenue startup valuation works, what the latest UK seed data shows, and how SEIS and EIS shape the conversation.
What Startup Valuation Means: Pre-Money vs Post-Money
Post-money valuation equals pre-money valuation plus the new investment, so a £2m pre-money valuation with a £500k raise gives a £2.5m post-money valuation.
Work backwards and pre-money is post-money minus the investment.
The split matters because it sets dilution: in that example, the £500k buys 20% of the company. Every offer is quoted pre-money or post-money, so check which number an investor means.
Option pools interact with both: see our pre-money vs post-money option pool guide.
Why Pre-Revenue Valuation Works Differently
Pre-revenue startup valuation relies on qualitative and comparison-based methods, because there is no revenue to apply a multiple to.
Revenue multiples are hard to use credibly without sales, so scorecard and checklist-style approaches are common instead.
UK advisers describe these startup valuation methods as focused on potential rather than financial performance, and recommend combining several rather than trusting one.
For you, that means your valuation is an argued position, not a calculation.
Startup Valuation Methods Investors Use
The main startup valuation methods for early-stage companies are scorecard, Berkus, venture capital, cost-to-recreate and comparable transactions, and advisers recommend combining several.
Run at least two and see whether they land in the same range. If they don’t, that gap is the first thing an investor will probe.
Seed Round Valuation UK: What the 2025 Data Shows
The median UK seed-stage pre-money valuation hit a record £3.2m in 2025, with the average at a record £6.0m.
The median fell 9% between the first and second halves of 2025.
Seed deal numbers dropped 27% to 704 while investment held at £2.1bn, so more money went into fewer companies. The median seed deal stayed at £0.6m, while the average deal rose 41% to £3.2m, helped by one £445m round for Fidra Energy (without it, the rise would have been 11%).
Seed companies also waited longer between rounds: a median 14.4 months, up from 12.4 in 2024.
Two cautions.
The Bank’s “seed” label follows Beauhurst’s company-stage classification, not the type of funding round. And many early seed rounds close privately through angel networks, so they rarely appear in the data.
Treat these figures as a market guide, not a price for your company.
How SEIS and EIS Affect Your Round
A company qualifies for SEIS if it has traded for no more than three years, has fewer than 25 full-time equivalent employees and holds gross assets of no more than £350,000 when shares are issued.
It must also carry on a qualifying trade, be established in the UK and meet HMRC’s risk-to-capital test, and it can raise up to £250,000 through the scheme. Investors get 50% income tax relief on up to £200,000 a year (BDO).
SEIS is unavailable after EIS or VCT investment, but SEIS-funded companies can raise from both later (BDO). The ceiling shapes your maths: at an illustrative £1m pre-money, £250,000 buys 20% of a £1.25m post-money company.
Larger rounds may look to EIS, whose company limits rose for shares issued from 6 April 2026: gross assets up to £30m before issue and £35m after, £10m a year (£20m for knowledge-intensive companies) and £24m over a lifetime (£40m). Specified companies face lower limits, so check HMRC’s rules first.
ASAs vs Convertible Loan Notes: How Your Instrument Changes the Deal
An advance subscription agreement (ASA) can qualify for SEIS or EIS relief if it meets HMRC’s conditions; a convertible loan note cannot, because it counts as debt.
An ASA lets investors pay now and receive shares later, usually at a discount to the next round’s price. Because shares are priced on conversion, an ASA postpones your valuation rather than fixing it.
HMRC will only treat one as suitable if the subscription cannot be refunded, varied, cancelled or assigned, carries no interest, and has a longstop date expected to be no more than six months.
Advance assurance is optional, but if you want it, apply before the ASA is signed. Miss these conditions and you put the relief at risk.
Common Startup Valuation Mistakes
Quoting the average seed valuation instead of the median overstates the typical founder’s position: the British Business Bank’s 2025 average of £6.0m is nearly double its £3.2m median.
- Mixing sources and periods: Figures from different datasets and time periods are not comparable. Name the source and period every time.
- Treating Berkus’s dollars as UK benchmarks: It is a US framework, so use it to structure your thinking, not to set a price.
- Leaning on one method: Advisers recommend combining several (Standard Ledger).
- Calling a seed median a pre-seed benchmark: The British Business Bank reports seed, venture and growth stages, not pre-seed, so no official UK pre-seed valuation figure exists in its data.
How to Defend Your Valuation
You defend a valuation by showing that several methods converge on the same range, and by tying every number to a named source and period.
Pick comparable rounds in your sector and region, as Standard Ledger advises, and use the British Business Bank median as a reference point, not a target. Expect pushback on timing: the median seed pre-money fell 9% in the second half of 2025, and rounds are taking longer, so show a runway that survives a slower raise.
And don’t trade terms for a headline number.
HSBC Innovation Banking’s Venture Capital Term Sheet Guide 2026 found participating preference shares at seed doubled from 7% to 14%, even as they eased at later stages, so read the structure as closely as the price.
A defensible valuation is one you can explain, with sources, in two minutes.
FAQs
1. How do you value a startup with no revenue?
Pre-revenue startup valuation rests on qualitative or comparison-based methods such as scorecard, Berkus, comparable deals, the venture capital method and cost-to-recreate, because there is no revenue to apply a multiple to. Advisers recommend combining several rather than relying on one.
2. What is the difference between pre-money and post-money valuation?
Pre-money is a company’s value before new investment, and post-money is pre-money plus the investment. A £2m pre-money valuation with a £500k raise gives £2.5m post-money, so the new investor holds 20% (Sprintlaw).
3. What is a typical seed round valuation UK founders should expect?
The median seed-stage pre-money valuation was £3.2m in 2025, the average £6.0m, and the median seed deal £0.6m (British Business Bank Small Business Equity Tracker 2026). The median fell 9% between the first and second halves of 2025.
Sources: British Business Bank Small Business Equity Tracker 2026 (published 2 July 2026, using Beauhurst data); HMRC and gov.uk guidance on SEIS; Angel Capital Association; HSBC Innovation Banking Venture Capital Term Sheet Guide 2026; BDO; Saffery; Osborne Clarke; Ashfords; Vestd; Sprintlaw; Standard Ledger. Figures reflect the most recent available data at the time of writing.
The EP+ Editorial Desk covers UK startups, founder stories, and venture capital. All editorial content is independently produced and human-reviewed before publication.
