Financial due diligence (FDD) for M&A is a deep, buy-side review of a target company's financials carried out before a deal is signed. It tests whether reported profits are real and sustainable, identifies EBITDA adjustments and one-off items, examines working capital, debt and related-party transactions, and flags red flags such as customer concentration or aggressive revenue recognition. Buyers use the findings to validate the price, renegotiate terms and build protections into the share purchase agreement.

The term "financial due diligence audit" is used loosely, but FDD is not an audit in the statutory sense. A statutory audit is a legal compliance exercise that gives an opinion on historical financial statements, while financial due diligence is an advisory exercise focused on the quality and sustainability of future earnings. FDD scope is negotiated deal by deal, and the output is a findings report for the buyer, not an audit opinion.

A financial due diligence checklist is the list of areas a deal team examines in a target company. It usually covers revenue quality and customer concentration, EBITDA and one-off adjustments, working capital and its normalisation items, debt and debt-like items, related-party transactions, capital expenditure, tax exposures and the reliability of management projections. Whatever the team finds is finally compiled into the financial due diligence report that goes to the buyer.

Start by understanding the deal context and agreeing the scope with the client. Then gather the target's financials, MIS and statutory returns, analyse revenue recognition and margin trends, build quality-of-earnings adjustments to arrive at sustainable EBITDA, normalise working capital, identify debt-like items and review related-party transactions. The final step is summarising red flags and quantifying how each finding impacts valuation and deal terms.

It depends on the size of the transaction, the scope of work and the firm you engage. A limited red-flag review costs far less than a full-scope FDD, and Big 4 teams usually price higher than boutique advisory firms. For mid-market Indian deals, fees at established firms generally run into several lakhs of rupees, while larger or cross-border transactions cost significantly more; most engagements take three to six weeks.

The financial due diligence salary varies mainly with your qualification and the firm. CA freshers and MBA (finance) graduates joining transaction services teams at larger firms typically start in the range of ₹8–14 lakh per annum, with Mumbai and Bengaluru often at the higher end, while graduates or CFA candidates may begin slightly lower. Compensation rises quickly because FDD experience is highly valued in investment banking, private equity and corporate development.

The usual entry routes are CA, MBA in finance or CFA, and most financial due diligence jobs sit with the transaction services teams of the Big 4 and boutique M&A advisory firms in Mumbai, Gurugram and Bengaluru. Build strong Ind AS and accounting fundamentals, Excel and financial modelling skills, and understand what a quality of earnings analysis actually involves. Campus placements, off-campus applications and referrals all work, and a mock interview with someone already working in FDD sharply improves your chances.

Transaction advisory services support clients across the deal lifecycle — buy-side and sell-side due diligence, valuations, financial modelling, merger integration, restructuring and SPA support. Another question people commonly ask is: what is a transaction advisory role like day to day? Expect long stretches in data rooms, building earnings-quality and working-capital schedules, drafting red-flag reports and joining client calls, with the pace intensifying close to signing.

Deal advisory is the broader umbrella under which firms group all deal-related work — M&A advisory, valuations, modelling, restructuring and due diligence. Transaction advisory, which is where financial due diligence sits, is one service line within it. So the two are related but not identical: if your goal is FDD work, you would typically be joining the transaction services or deal advisory practice of a firm.

Yes. CA is the most common qualification in this field, but MBA (finance) graduates, CFA candidates and commerce postgraduates do get in, especially with strong accounting, Excel modelling and deal fundamentals. Boutique and mid-size advisory firms are often more flexible than the Big 4, and demonstrating FDD-specific preparation — real interview questions, quality of earnings concepts and modelling tests — usually matters more than the suffix after your name.

The recurring ones are: Why FDD and not audit? What is quality of earnings? What is the difference between FDD and a statutory audit? What are typical EBITDA adjustments? How would you assess revenue quality? What is working capital normalisation, and what are debt-like items? For the answers, use a fixed structure — define the concept, explain why it matters in a deal, then give a practical example with the valuation impact. Interviewers reward deal thinking far more than textbook definitions.

Expect questions on Ind AS and accounting fundamentals (revenue recognition, provisions, leases), quality of earnings and common adjustments, working capital analysis, key ratios, debt-like items and basic valuation. Many firms also test Excel and modelling through a case or a small live exercise. The best preparation is working through a mock deal end to end rather than reading theory in isolation.

Free lists circulate on forums and prep blogs, but they are usually generic, repetitive and unstructured. A better option is a curated FDD interview playbook — a PDF of real questions with structured model answers prepared by someone who actually works in FDD — ideally paired with a 1:1 mock interview so you learn how to frame answers under pressure instead of memorising them.

It is not mandatory — hiring decisions rest on your qualification, accounting and modelling skills, and interview performance. That said, FDD is barely covered in most CA, MBA and CFA curricula, so a focused financial due diligence course or playbook helps you learn quality of earnings, adjustments and red-flag reporting the way they are actually done on live deals. Choose practical, deal-based content over theory-heavy certifications.

Deloitte FDD interview questions typically test the difference between audit and FDD, EBITDA adjustments, working capital and revenue quality, often alongside an Excel or modelling round and an HR round. EY FDD interview questions follow a similar pattern but usually add a case-style discussion where you work through a mini deal scenario, with deeper probing on how each adjustment impacts EBITDA. The pattern is broadly similar across other Big 4 firms too, so preparing real questions with structured answers matters more than memorising firm-specific lists.