Due diligence

What questions do investors ask in due diligence?

Diligence questions are not a quiz. Each one exists to test a specific assumption in the investment case, and knowing which assumption is being tested makes the answers far easier to prepare.

Published 25 August 2026 · 8 min read

Article

Commercial

  • Who are your ten largest customers and what share of revenue do they represent?
  • What is your logo and revenue churn by cohort, not blended?
  • Which channel produced your last twenty customers, and at what cost?
  • What happens to the customer if they stop using you tomorrow?

Financial

  • Show cash collected against revenue recognised for the last eight quarters.
  • What is fully loaded CAC and gross-margin payback by segment?
  • Which costs are committed for the next twelve months and which are discretionary?
  • What does the plan assume about price, and when did you last raise it?

Technical and product

  • What breaks first at ten times current load?
  • What is your dependency on any single vendor or model provider?
  • How much of the roadmap is maintenance versus new capability?
  • Who is the single point of failure on the engineering team?

Legal, data and team

  • Is IP fully assigned by every founder, employee and contractor?
  • What personal data do you process, on what lawful basis, and where does it live?
  • Are there outstanding safes, notes, side letters or verbal commitments?
  • Who has left in the last twelve months and why?

What a good answer looks like

Specific, sourced and unflattering where the truth is unflattering. A founder who volunteers the weak cohort before being asked buys credibility for every other number in the pack. A founder who is discovered hiding it loses credibility for all of them at once.

Prepare answers in the data room rather than in the meeting. The full eighteen-point version of this list, with the evidence each item requires, is in our diligence checklist.

Part of a guide

Investment due diligence: a complete guide

A complete guide to investment due diligence: the workstreams, the questions investors ask, the red flags that matter, the data room, and how findings become a defensible memo.

Keep reading

Investment process

How to read a pitch deck in twelve minutes

A repeatable reading order for pitch decks: which four slides decide the meeting, what each one has to prove, and the questions that expose a weak deck fast.

Market analysis

Which moats actually hold at seed stage

Most claimed moats are not moats at seed stage. A ranking of defensibility types by how quickly a funded competitor can neutralise them, with what to verify for each.