Antitrust Due Diligence for M&A in India (2026): Step‑by‑step Checklist for Buyers & Sponsors

Antitrust due diligence india is the disciplined, evidence‑led process by which a buyer or sponsor tests whether a proposed acquisition will trigger merger‑control obligations before the Competition Commission of India (CCI), and whether the target’s commercial arrangements conceal latent competition‑law exposure. In 2026 the exercise carries fresh weight: intensified CCI scrutiny of digital, consortium and joint‑control transactions, coupled with the phased implementation of amendments introduced by the Competition (Amendment) Act, 2023, including the deal‑value threshold and revised review timelines, means deal teams can no longer treat competition review as a late‑stage formality. This guide converts the statutory framework of the Competition Act, 2002 and the CCI’s combination regulations into a procedure a deal team can execute end‑to‑end.

It sets out who owns each step, how long each stage realistically takes, the documents you must gather, the costs to budget for, and the share‑purchase‑agreement (SPA) protections that allocate residual risk. Read it as a working manual rather than a summary of the law.

Overview: what antitrust due diligence india involves

What is antitrust due diligence?

Antitrust due diligence is the structured investigation of a target’s market position, commercial contracts and conduct to identify (a) whether the transaction requires notification to the CCI as a “combination” and (b) whether the target’s existing behaviour, pricing, exclusivity, tying, information sharing, carries antitrust liability that survives closing. It is both a gating exercise (can we do the deal, and on what conditions?) and a risk‑pricing exercise (what protection do we need in the SPA?).

When is it mandatory versus advisable?

Notification to the CCI is mandatory where a transaction meets the statutory asset or turnover thresholds and constitutes a “combination” under the Competition Act, 2002 (ss. 5–6), or where it meets the deal‑value threshold introduced by the Competition (Amendment) Act, 2023 and the target has substantial business operations in India. Even where thresholds are not met, antitrust due diligence remains strongly advisable in three risk categories now central to CCI attention: digital‑market deals, consortium or club acquisitions, and transactions producing shared or joint control. Latent conduct risk, cartel exposure, resale price maintenance, abuse of dominance, is not threshold‑dependent and can be inherited on closing.

Who should read this checklist?

This checklist is written for the decision‑makers who own transaction risk and the specialists who execute the workstream. Roles map as follows:

• Buyer lead counsel / deal principal. Owns scope, sequencing and final risk allocation.
• Antitrust / competition counsel. Owns threshold analysis, market definition, filing strategy and CCI liaison.
• Private equity sponsor / investment committee. Owns go/no‑go and conditionality.
• Commercial, IP and finance leads. Own contract, licensing and turnover data respectively.
• Compliance / integration team. Owns post‑clearance monitoring and remedy delivery.

Eligibility: does the deal trigger CCI or pre‑merger review?

Statutory thresholds

The obligation to notify arises from the combination provisions of the Competition Act, 2002 (ss. 5 and 6), which define combinations by reference to asset and turnover thresholds measured both in India and worldwide, with distinct tests for parties and for the group to which the acquirer belongs. The Competition (Amendment) Act, 2023 also introduced a deal‑value threshold that can trigger notification for high‑value transactions where the target has substantial business operations in India, together with a “small target” (de minimis) exemption for acquisitions below prescribed asset/turnover limits.

Because these thresholds are periodically revised by notification and are subject to exemptions, the exact figures applicable to your transaction must be verified against the current Competition Act text and the CCI’s combination regulations at the date of signing. Do not rely on remembered numbers; confirm the live thresholds before concluding that a filing is or is not required.

Practical triggers that create risk even if thresholds are not met

Sub‑threshold does not mean risk‑free. The following features can create competition exposure regardless of notification status:

• High combined market share in a narrowly defined product or geographic market.
• Vertical leverage, the target controls an input, distribution channel or platform on which rivals depend.
• Essential IP or interoperability control that can foreclose competitors.
• Exclusive or long‑term agreements that lock up customers or supply.
• Consortium or joint‑control ambiguity that may itself amount to a notifiable change of control.

Gateway question checklist

• Does the transaction change control, and for whose benefit?
• Do the parties (and acquirer group) meet the current asset or turnover thresholds, or the deal‑value threshold?
• Is any statutory exemption (including the de minimis / small target exemption) available and documented?
• Is there horizontal overlap or vertical dependency between the parties?
• Are digital‑market, platform or data assets in scope?

Step‑by‑step antitrust due diligence india process

The core of any antitrust due diligence india workstream is a sequenced, owner‑assigned process. The twelve steps below run across four phases, pre‑deal, transaction, pre‑filing and filing, and post‑closing. For each step the deal team should record the action, the responsible party, the deliverable, the red flags and the SPA protection it informs.

Pre‑deal phase (Steps 1–4)

1. Initial screening, scope and thresholds check. Owner: buyer lead counsel with antitrust counsel. Run a rapid statutory threshold check under the Competition Act, 2002 (ss. 5–6), including the deal‑value threshold, and assign a high‑level risk rating. Deliverable: a one‑page trigger memo. Red flag: any horizontal overlap combined with plausible threshold breach, escalate before spending further.
2. Data room request and initial document pull. Owner: deal team / project manager. Issue a standard antitrust data request (see the required‑documents table) and set a data‑room priority order. Deliverable: indexed document set. Red flag: seller reluctance to disclose customer or pricing data.
3. Market definition and commercial assessment. Owner: antitrust counsel with an economic consultant and business leads. Define candidate product and geographic markets and test them against commercial reality. Deliverable: draft market‑definition memo. Red flag: markets so narrow that combined shares spike.
4. Market share and turnover calculations, geographic mapping. Owner: antitrust counsel with finance. Compute India and worldwide turnover for threshold purposes and combined market shares by candidate market. Deliverable: turnover and share model (machine‑readable). Red flag: shares above roughly 25–35% in any narrow market.

Transaction phase (Steps 5–9)

5. Vertical restraints and contract review. Owner: commercial counsel with antitrust counsel. Examine supply, input and platform contracts for foreclosure and exclusivity. Deliverable: contract risk register. Red flag: long‑term exclusive supply that ties up a scarce input.
6. IP, licensing and interoperability assessment. Owner: IP counsel with antitrust counsel. Identify essential patents, exclusive licences and interoperability chokepoints. Deliverable: IP dependency map. Red flag: essential IP tied to market access for rivals.
7. Distribution and agency agreements. Owner: commercial counsel. Review dealer, distributor and territory arrangements for exclusionary restraints. Deliverable: distribution restraint schedule. Red flag: territorial carve‑ups or resale price maintenance.
8. Competitor and customer checks, interviews and site visits. Owner: deal team with counsel. Validate market shares and switching dynamics through targeted enquiry. Deliverable: field‑validation note. Red flag: customers reporting no viable alternative supplier.
9. Integration planning and remedy feasibility analysis. Owner: buyer with external counsel. Assess whether structural or behavioural remedies would be needed and whether they are deliverable. Deliverable: remedy feasibility memo feeding SPA risk allocation. Red flag: a deal that only clears with divestiture the buyer cannot execute.

Pre‑filing and filing phase (Steps 10–11)

10. Pre‑notification strategy and draft filing. Owner: antitrust counsel with a regulatory specialist. Decide whether to seek pre‑notification engagement with the CCI, and draft the notification. Deliverable: filing strategy paper and draft form. Red flag: gaps in turnover or market data that will invite information requests.
11. CCI filing and liaison. Owner: antitrust counsel with filing agent. If notification is required, prepare and lodge the appropriate combination form (Form I or Form II, as applicable) under the CCI’s combination regulations, and manage follow‑up queries. Deliverable: acknowledged filing and query log. Red flag: issuance of a show‑cause notice or reference to a detailed (Phase II) inquiry.

Post‑closing / implementation phase (Step 12)

12. Conditions compliance and post‑clearance monitoring. Owner: compliance / integration team. Implement any behavioural or structural commitments and monitor conduct. Deliverable: compliance dashboard. Red flag: slippage against remedy deadlines in the first three to six months, which are the critical window.

Step / who / duration timeline

Red flags to escalate immediately

• Horizontal overlap among the top three suppliers or customers of the merging parties.
• Combined market share above roughly 25–35% in a narrowly defined market.
• Exclusive long‑term agreements that foreclose rivals from customers or inputs.
• Essential IP tied to market access for competitors.
• Consortium or joint‑control ambiguity that may itself be notifiable.

Download the 2026 Antitrust DD Checklist (India), the request list plus timeline matrix, for use across your deal team.

Required documents for antitrust due diligence india

The quality of an antitrust due diligence india review is only as good as the underlying document set. Request the following items early, and prioritise the turnover and market‑share inputs so that threshold analysis is not stalled by late disclosure.

Practical tips for document requests

• Standardise the request. Embed a fixed antitrust data request list in every DD checklist so nothing is missed.
• Insist on machine‑readable data. Request revenue and customer data in CSV so share and turnover models can be built quickly.
• Sequence the data room. Prioritise turnover and customer data to unblock threshold analysis.
• Anonymise sensitive data. Strip customer identities before sharing with external economic consultants to avoid competitively sensitive information exchange.

Timeline and deadlines: CCI filing checklist

Statutory review timing and practical timing diverge, and buyers should plan for both. Under the Competition (Amendment) Act, 2023, the CCI is required to form a prima facie opinion within a shorter statutory window than previously applied, and the overall outer limit for concluding a combination assessment has been reduced; the exact statutory periods (and any exclusions for information requests) should be confirmed against the current Act and combination regulations at the time of filing. A straightforward notification that raises no substantive concern is typically reviewed comparatively quickly. Where the CCI requires a more detailed (Phase II) inquiry, the review extends materially once information requests, market testing and remedy discussion are factored in.

Pre‑notification engagement is a strategic lever. Voluntary pre‑filing consultations with the CCI can add time before the formal clock starts, but they frequently reduce the volume and severity of post‑filing information requests by aligning the parties and the regulator on market definition and data before lodging. For deals with any substantive overlap, the time invested pre‑filing is usually recovered later. Build these contingencies into the SPA long‑stop date rather than assuming a best‑case timetable, and keep the turnover and share model live so that any CCI query can be answered within days rather than weeks.

Note also that combinations may not ordinarily be given effect until the CCI has cleared them (subject to the “gun‑jumping” prohibition), so closing timelines must reflect the clearance requirement.

Costs and fees

Budgeting for antitrust due diligence india is driven by both professional/economic advisory fees and the statutory CCI filing fee. The CCI charges a filing fee for combination notices, which differs depending on whether a Form I or Form II filing is made and is prescribed under the combination regulations. Because the fee schedule is revised from time to time, confirm the current fee under the applicable CCI regulations at the time of your filing.

What changes in 2026: regulatory and market updates

Competition (Amendment) Act, 2023, practical deal impacts

The Competition (Amendment) Act, 2023 introduced significant changes to the merger‑control regime that continue to shape deals in 2026, including a deal‑value threshold for transactions with substantial Indian business operations, a codified “control” standard, shorter statutory review timelines, and a settlement and commitments framework for certain proceedings. Deal teams should track the CCI’s implementing regulations and any subsequent notifications, as several elements were operationalised through phased subordinate legislation. The practical effect is heightened attention to how control is documented and to whether high‑value, low‑turnover (including digital) targets now fall within notification, both of which feed directly into whether a transaction is a notifiable combination.

Corporate‑law reform and structuring

Ongoing corporate‑law reform relevant to deal structuring should be monitored through the Ministry of Corporate Affairs and parliamentary records, since corporate‑law changes interact with foreign‑investment rules and with the corporate mechanics that determine when control changes for competition purposes. Until any proposed amendment’s text is finalised and notified, deal teams should treat structuring assumptions as provisional.

CCI enforcement trends, digital and joint‑control focus

The CCI has maintained a clear focus on digital‑platform transactions, data‑driven market power and consortium or club‑deal structures that concentrate control among a small group of acquirers. The practical consequence for antitrust due diligence india is that digital and joint‑control features should be screened early rather than treated as edge cases.

Practical takeaways for buyers

• Run an early IP and technology screen where the target holds data assets, platforms or essential IP.
• Test the deal‑value threshold for high‑value transactions even where turnover is modest.
• Document consortium arrangements transparently so control questions are resolved before filing.

Common pitfalls and SPA risk allocation for antitrust due diligence india

Even a rigorous antitrust due diligence india review leaves residual risk that must be allocated in the SPA. The most frequent pitfalls are avoidable:

• Late threshold analysis that surfaces a filing obligation after signing.
• Overlooking the deal‑value threshold for low‑turnover, high‑value targets.
• Over‑narrow or over‑broad market definition that misstates share.
• Ignoring sub‑threshold conduct risk inherited on closing.
• Underestimating detailed‑review timing when setting the long‑stop date.
• Gun‑jumping, implementing the combination before clearance.
• Sharing competitively sensitive data without anonymisation.
• Assuming remedies are deliverable without feasibility testing.
• Weak cooperation clauses that leave the buyer unable to compel seller support during CCI review.
• No allocation of remedy costs between the parties.
• Overlooking consortium control as a notifiable event.

Drafting pointers: pair a warranty with a targeted indemnity where the diligence identifies a specific conduct risk; size any escrow to the quantified exposure with a survival period aligned to limitation risk; and include a robust cooperation covenant requiring the seller to provide data and support throughout CCI review, with a clear escalation and dispute‑resolution clause. Ensure the SPA expressly conditions completion on CCI clearance to avoid gun‑jumping exposure.

How to choose antitrust counsel

Selecting external advisers is part of the diligence process, not an afterthought. Prioritise demonstrable CCI combination experience, economic‑analysis capability and, for inbound deals, coordinated cross‑border filing strategy. Public rankings and “tier” labels are marketing signals rather than a substitute for checking a firm’s actual combination track record; assess the individuals who will run your matter, their availability, and their experience of the specific market and deal type. Jurisdictional and local‑counsel considerations matter where filings must be lodged in local format. For orientation, see International M&A Lawyers, India 2026 (Companies Act, CCI, FDI checklist) and the GLE lawyer directory for India M&A.

Sources

1. Competition Commission of India (CCI), official site
2. CCI Combination Regulations / Filing Guidance
3. Ministry of Corporate Affairs (MCA)
4. National Company Law Appellate Tribunal (NCLAT), judgments & orders
5. Supreme Court of India, judgments portal
6. Bar Council of India