From Big 4 Audit to Transaction Services: The Complete Guide
How to transition from Big 4 audit to Transaction Services: transferable skills, gaps to fill, how to position your experience and interview preparation.
The audit-to-TS transition is the most well-trodden path into Transaction Services. Done well, it's a natural progression. Done poorly — without understanding what's different about the role — it results in a weak interview performance despite a strong technical background.
Why audit experience is genuinely valuable in TS
Audit and Transaction Services share more than most people realise:
Reading financial statements: after two years in audit, reading a set of accounts is second nature. Spotting unusual line items, understanding how consolidation works, navigating notes and disclosures — all of this translates directly.
Accounting standards knowledge: whether you work with IFRS or local GAAP, you understand the choices companies make in how they present their financials. This matters enormously in FDD when you're evaluating capitalisation policies, revenue recognition, or provision adequacy.
Rigour and documentation: the habit of tracing numbers to source documents, maintaining a clear audit trail, and supporting conclusions with evidence is exactly what FDD requires.
Sector knowledge: after two or three years in audit, you often have meaningful sector expertise that is directly applicable to TS engagements.
What you need to develop before the interview
The gap between audit and TS is real but bridgeable. Key areas to work on:
The QoE framework: auditors verify accounts; TS professionals assess sustainable earning power. You need to be fluent in the EBITDA bridge — one-offs, run-rates, pro-formas — and be able to apply it to real data.
Net debt and the EV/Equity bridge: understanding all the components (including debt-like items, IFRS 16, pension deficits) and how they feed into the transaction price.
Working capital normalisation: the NWC peg concept, DSO/DPO/DIO analysis, seasonality effects.
Deal vocabulary: SPA, locked box, completion accounts, earn-out, data room — these need to be natural in your conversation.
How to position your audit experience in the interview
The single biggest mistake audit candidates make in TS interviews: answering every question from an audit frame of reference. "We test controls", "we certify the accounts", "we verify completeness" — this is audit language. TS language is different.
Instead: "I analysed margin trends across subsidiaries", "I identified an accounting policy that was inconsistent with industry practice", "I built a revenue bridge to understand the organic vs acquired growth split."
Same underlying work, completely different framing. Practice this switch before your interview.
When is the right time to move?
Most successful audit-to-TS transitions happen at the 2-3 year mark. Earlier, and you don't yet have the substantive financial analysis experience to be credible. Later, and you're so embedded in audit seniority that the transition feels larger.
If you're in a Big 4 that has a Transaction Services team, internal mobility is often the most efficient route. Your understanding of the firm's processes and your existing network are significant advantages.
The programme was designed specifically for audit professionals targeting TS roles — with case studies that bridge the two worlds effectively.