Anchored to UK statute. Last verified 21 June 2026. View source-of-record.

maduediligencechecklist.co.uk

The UK M&A Due Diligence Checklist

Big Four

Deloitte UK - due diligence services


Big Four house with full Strategy and Transactions team. Anchors on £50m+ EV deals, regulated targets, cross-border and carve-out complexity.

Direct answer

Deloitte UK is a Big Four transaction-services firm. UK fees are quote-only: the firm publishes service descriptions, not rate cards. Engagement scopes are issued per workstream after a 5-10 working-day discovery window.


Workstreams covered

  • FDD
  • Tax DD
  • Commercial DD
  • Operational
  • M&A advisory

Sector focus

  • Financial services
  • TMT
  • Energy
  • Healthcare
  • Infrastructure

Pricing approach

Quote-only. Big Four FDD on sub-£50m EV deals routinely scopes £60-150k+. Premium typically justified by multi-jurisdiction tax or regulated-target experience.

Source: www2.deloitte.com - verified 2026-06-21.

When to instruct

Big Four scope tends to be disproportionate at sub-£20m EV unless the target is regulated, multi-jurisdiction or carries unusual tax complexity. Insist on capped fees and a named partner whose hours appear on the engagement letter.


Reviewed by Oliver Wakefield-Smith, Founder, Digital SignetLast verified 21 June 2026

This page is anchored to UK primary legislation and named regulator guidance only. Not legal advice. Confirm position with your appointed adviser before signing.