What impact investors look for in UK startups

Impact investors in the UK look for startups where positive social or environmental impact is built into the business model, so that impact grows as revenue grows. They want a clear theory of change, two or three measurable outcome metrics with a baseline, honest thinking about risks and unintended harm, and the same commercial strength any VC expects. They will also check that the way you run the company does not contradict your mission.

If your product is designed to make something better, you are already halfway there. The rest is evidence and clarity.

How is an impact investor different from an ESG-minded VC?

The two get confused, and the difference shapes how you pitch.

An ESG-minded VC looks mainly at how you operate. Do you handle data properly, treat people fairly, run sensible governance and know your footprint? ESG is about managing risk, and it applies to any company. Our guide to ESG for startups covers what those investors ask.

An impact investor looks at what your product changes in the world. The impact is part of the investment thesis, and they will want to measure it over the life of the investment.

The UK has a well-established impact scene. A few examples show the range:

• Bethnal Green Ventures invests in early-stage tech for good startups tackling social and environmental problems, and became the first UK VC to certify as a B Corp in 2015.
• Ada Ventures is a pre-seed fund that says impact is assessed in every investment decision, with themes including climate equity, economic empowerment and healthy ageing.
• Better Society Capital, formerly Big Society Capital, is a UK social impact investor that grows the market largely by investing through funds and other intermediaries.

These are examples, not recommendations. Always check each investor’s current thesis and stage before you approach them.

What do impact investors look for?

Across funds, the same questions come up.

1. Is the impact intentional and intrinsic? Impact should come from your core product, not a side project. If you stopped selling, would the impact stop too? It should.
2. Do you have a theory of change? A simple chain from problem to activities to outcomes, with your assumptions written down.
3. Can you describe impact across the five dimensions? Many impact investors use the Five Dimensions of Impact: what outcome, who experiences it, how much (scale, depth and duration), your contribution compared with what would have happened anyway, and the risk that impact turns out differently.
4. Are your metrics measurable, with a baseline? Investors want to see change against a starting point, not just activity counts.
5. Have you thought about negative impacts? Every product has some. Naming them and showing how you mitigate them builds trust.
6. Are impact and growth aligned? The best impact businesses deliver more impact as they sell more. If growth would dilute impact, expect hard questions.
7. Is the business commercially strong? Impact does not replace a good market, a capable team and a credible route to revenue.

How to measure impact at an early stage

You do not need an impact report with 40 indicators. You need a small number of honest measures you can collect reliably.

Separate outputs from outcomes. Outputs are what you do: 200 restaurants using your app. Outcomes are what changes: 18 tonnes of food waste avoided in a year. Investors care most about outcomes, but outputs are often the leading indicator you can measure now.

Set a baseline. Measure the situation before your product arrives. A food waste startup might weigh bin contents at a pilot site for four weeks before and after installation.

Be conservative with avoided emissions. If your product helps customers cut emissions, explain your method, use official UK conversion factors where they exist and state the counterfactual. Keep avoided emissions completely separate from your own company footprint.

Write down the assumptions. “We assume 70% of diverted food would otherwise go to general waste” is a sentence that turns a guess into an assessable estimate.

Here is how that might look for a startup helping restaurants cut food waste:

Metric	Type	Baseline	Current
Restaurants live on platform	Output	0	42
Average food waste per site per week	Outcome	61 kg	44 kg
Estimated waste avoided per year	Outcome	n/a	about 37 tonnes

Three lines, one assumption-driven estimate clearly labelled, and a story an investor can test.

What does a simple theory of change look like?

It can fit in five lines. For the same food waste startup:

• Problem. Restaurants over-order and throw away edible food, which costs money and creates emissions.
• Activity. Our app forecasts demand and tracks waste by dish.
• Output. Kitchens adjust orders weekly using our recommendations.
• Outcome. Less food bought and binned per site.
• Assumption. Kitchen staff act on the recommendations at least three days a week.

That last line matters most. It tells the investor what has to be true for the impact to happen, and what you will monitor.

Why your own ESG basics still matter

Impact investors will still look at how you run the company. A climate startup with an unmeasured footprint full of long-haul flights, or a social mission business with no fair pay approach, creates an awkward contradiction. Diligence teams notice.

The basics are the same as for any VC: a recent carbon footprint, a short environmental policy, a code of conduct, decent data protection and a clear view of what is material to your business. They do not take long to put in place, and they stop your operations undermining your impact story.

Be careful with language too. Impact investors are alert to greenwashing and its social equivalent, sometimes called impact washing. Our guide on putting ESG in your pitch deck covers the wording to watch.

Preparing for an impact investor conversation

Before your first meeting, have these ready:

• A one-page theory of change
• Two or three outcome metrics with a baseline and the method behind them
• A short note on possible negative impacts and how you manage them
• Your own ESG report and carbon footprint
• Your core policies in a data room folder

ESG Now can handle the operational side. The questionnaire produces a shareable ESG report, your Scope 1, 2 and 3 footprint using UK government factors, and a private action plan that shows which policies you have in place and which are worth adding next. Each figure is labelled as measured, estimated or a data gap, which is the kind of honesty impact investors respect. A small team usually finishes in 15 to 20 minutes, and your first report is free. Start your report here.

For more on raising as a founder, visit the startups raising investment hub.