The customers-doubled settlement criterion, explained

Of the seven business criteria for Innovator Founder settlement, the customer-growth test looks the friendliest to early-stage founders. You do not need £1 million in revenue or ten employees. You need your customer base to have grown. But the wording has two parts, and the second part, a comparison with other UK businesses, is where an otherwise strong growth story can fall short.

This article reads criterion (ii) closely, based on the Home Office caseworker guidance "Innovator Founder" version 11.0 (4 August 2026), and sets out practical ways to prepare the evidence. It does not set out a Home Office evidence list, because the criterion itself does not come with one; treat the evidence ideas below as preparation, not as a prescribed format.

The exact wording

The guidance lists, as one of seven criteria, customer numbers that have at least doubled within the most recent three years and are currently higher than the mean for comparable UK businesses. Read the current text of the guidance yourself before relying on any paraphrase, including this one.

That breaks into two tests:

Your endorsing body has to be satisfied on both, because the settlement letter must confirm that at least two of the seven criteria are met.

Half one: doubling

"At least doubled" is arithmetic, but the inputs need care.

Pick your baseline deliberately. "Within the most recent three years" means the growth is measured over a recent window. A hypothetical founder who had 40 customers three years before applying and 95 now has more than doubled. The same founder measuring from a peak of 60 in the middle of that period has not. Know which figure you are relying on and why.

Define "customer" once. A software business might count paying accounts, a marketplace might count buyers who transacted, a services firm might count clients invoiced. Whatever you choose, apply it to the start and end figures in the same way. Switching definitions part-way through is the kind of inconsistency that undermines confidence in the rest of your evidence.

Very small starting bases double easily. That is fine under the wording, but it makes the comparison half more important. Doubling from 3 to 6 customers is still doubling; whether 6 beats the mean for comparable UK businesses is a separate question.

Half two: above the mean for comparable UK businesses

This is the harder part. The guidance asks whether your current customer numbers are higher than the mean for comparable UK businesses. The criterion does not name a data source for that mean.

Practical questions to work through:

• What is "comparable"? Similar sector, similar business model, similar stage or age are all reasonable lenses. Be explicit about the lens you use.
• Where will the mean come from? Industry reports, trade association data and published market research are common starting points. Note the source, date and scope of any figure you use.
• Is the comparison fair? A comparison with the largest firms in your sector will make you look small; one with a hand-picked set of weak competitors will not be credible. Aim for a comparison your endorsing body would accept if it checked.

If you cannot find a defensible comparison, that is a signal to rely on two other criteria rather than force this one.

Evidence ideas to prepare

None of these is a Home Office-prescribed list. They are the kinds of records that make a customer claim checkable:

• An export from your billing, CRM or accounting system showing customer counts at the start and end of the period
• A short written definition of "customer" as used in your figures
• Invoices or transaction summaries sampling customers across the period
• Your source for the comparable UK businesses mean, with a citation and date
• Notes from your contact point meetings showing how customer numbers tracked against your agreed plan

Your endorsing body is the one that must be satisfied. Ask early what it wants to see, and how it prefers figures presented.

How it combines with the other criteria

You need at least two criteria. Customer growth pairs naturally with some and less naturally with others:

Remember that the same criterion cannot count twice, and co-founders applying for settlement cannot share the same means. If you and a co-founder both want to rely on customer growth, read how teams handle settlement criteria and ask your endorsing body how it would treat that.

The rest of the settlement letter still matters

Even a clean customers case does not carry the application alone. The settlement letter must also confirm significant achievements against your previous business plan, Companies House registration with you as a director or member, active trading, sustainability for at least the next 12 months, and your active key role in day-to-day management. The full list is in our settlement checklist.

Sources and further reading

• GOV.UK — Innovator Founder caseworker guidance
• GOV.UK — Indefinite leave to remain: Innovator Founder visa
• GOV.UK — Immigration Rules Appendix Innovator Founder

Key takeaways

• Criterion (ii) has two parts: customers at least doubled within the most recent three years, and currently above the mean for comparable UK businesses.
• Define "customer" once and apply it consistently to your start and end figures.
• The comparison half needs a sourced, defensible benchmark; if you cannot build one, consider other criteria.
• Customers is one criterion only; you still need a second, different one.
• Agree the evidence format with your endorsing body before you request the settlement letter.

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