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GUIDE · SERIES A DUE DILIGENCE

Preparing for Series A

The due diligence playbook for UK startups going from Seed to Series A. What VCs look for, what kills deals, and how to be ready.

13 MIN READ UPDATED MAY 2026

§ QUICK ANSWER

What does Series A financial due diligence actually cover?

Series A financial due diligence covers: historical financial performance (3+ years of accounts where available, plus management accounts bridging to current month); revenue recognition methodology and consistency; customer concentration analysis (revenue by top customers, churn, retention metrics); cap table verification (every share, option, warrant, convertible note traced to documents); IP ownership (every founder and contributor IP assignment in writing); tax compliance (corporation tax, VAT, PAYE, R&D claim history, SEIS/EIS compliance certificates); financial controls (segregation of duties, expense policies, payroll integrity); financial forecasts (assumptions documented, sensitivity tested); and any material litigation or contingent liabilities. The depth varies by deal size; Series A typically takes 4-8 weeks of formal due diligence supplementing earlier indicative diligence.

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