What the Deal Room Didn't Reveal: Uncovering Hidden Excise and GST Liabilities in Indian Acquisitions

For US companies pursuing growth through acquisition in India, the appeal is straightforward: established distribution networks, existing manufacturing infrastructure, and a customer base that took years to build. What the investment thesis rarely accounts for is the possibility that the target company has been quietly accumulating tax and excise obligations that no one—not the seller, not the local accountants, and certainly not the M&A advisors—has fully mapped.

These liabilities do not appear on the balance sheet. They are not flagged in standard financial due diligence reviews. And they do not dissolve at closing. They transfer.

This is the excise surprise that an increasing number of US acquirers are encountering in the months following deal completion—when Indian tax authorities arrive with assessments covering periods that predate the transaction by three, five, or even seven years.

Why Conventional Due Diligence Falls Short

Most M&A due diligence frameworks are built around financial statement risk, legal title issues, and contractual obligations. When applied to Indian targets, these frameworks tend to treat tax compliance as a line-item review: are filings current, are payments up to date, are there any disclosed disputes?

That approach misses the structural complexity of India's indirect tax environment. India transitioned from the Central Excise Duty regime to the Goods and Services Tax framework in July 2017, but that transition did not erase pre-GST obligations. Companies that manufactured goods prior to 2017 may still carry unresolved excise duty assessments, classification disputes, or unapplied CENVAT credits that were never properly reconciled during the transition.

Acquirers who rely on representations and warranties without independently verifying the underlying compliance history are, in effect, accepting the seller's word that a system they may not fully understand was operated correctly over a multi-year period.

The Three Blind Spots That Consistently Escape Notice

Vendor and Input Documentation Gaps

India's GST framework—and the excise regime before it—conditions the availability of input tax credits on the integrity of documentation maintained by suppliers. If a target company's vendors failed to file returns correctly, submitted inaccurate invoices, or were subsequently cancelled from the GST registry, the credits that the target claimed against those purchases can be retroactively denied.

Due diligence teams rarely audit vendor compliance histories. They review the target's own filings. But the liability exposure embedded in a vendor network with documentation irregularities can be substantial, and it often only becomes visible when the tax authority reconciles purchase records against supplier filings—a process that can occur years after the relevant transactions.

Unresolved Historical Product Classifications

Excise duty rates under the pre-GST regime were determined by product classification under the Central Excise Tariff Act. Classification disputes—where the tax authority contends that a product should have been taxed at a higher rate than the company applied—are among the most common sources of legacy liability. These disputes frequently survive the GST transition as open assessments.

A manufacturing target may have been classifying a product under a concessional category for years, either through genuine interpretation or deliberate optimization. If the classification has not been formally adjudicated and closed, the acquirer inherits an open question that could resolve unfavorably at any point during the statutory limitation period.

US acquirers should insist on a complete classification history for every product manufactured or traded by the target, along with documentation of any correspondence with excise or GST authorities regarding those classifications.

Latent Obligations in Manufacturing Processes

Certain manufacturing activities trigger excise obligations that are not always visible in the ordinary course of business review. Job work arrangements—where a company sends materials to a third-party processor and receives finished or semi-finished goods in return—carry specific compliance requirements under both the excise and GST frameworks. If those requirements were not met, the liability attaches to the principal, not the job worker.

Similarly, captive consumption of manufactured goods, deemed manufacture determinations, and the treatment of by-products and waste materials all represent areas where obligations can accumulate without appearing in the company's primary compliance records. These are not exotic edge cases. They are routine features of Indian manufacturing operations that standard due diligence checklists frequently omit.

The Post-Closing Recourse Problem

One of the more painful aspects of this issue is the timing at which it typically surfaces. Indian tax assessments often arrive during integration, when the acquirer is focused on operational consolidation rather than historical compliance reconstruction. By that point, the representations and warranties period under the purchase agreement may be expiring or already expired, and the practical ability to recover from the seller—particularly if the seller was a domestic Indian promoter or a private equity fund that has since distributed proceeds—is limited.

Indemnity clauses that appear protective at signing can prove difficult to enforce when the underlying liability requires specialized knowledge of Indian excise law to even quantify, let alone litigate across jurisdictions.

The only reliable protection is pre-closing discovery.

A Compliance Audit Checklist for Indian Acquisition Targets

Before any cross-border deal involving an Indian manufacturing or trading business reaches the final stage, the following areas warrant independent verification by advisors with specific Indian indirect tax expertise:

• Pre-GST excise filings and assessments: Obtain and review all Central Excise returns filed from at least 2012 onward, along with any show cause notices, adjudication orders, or appellate proceedings.
• CENVAT credit ledger reconciliation: Verify that all credits claimed prior to the GST transition were properly accounted for and that the opening credit balance carried into GST was accurately calculated and filed.
• GST return reconciliation: Cross-reference GSTR-1, GSTR-3B, and GSTR-9 filings for the past three to four years to identify mismatches that could attract scrutiny.
• Vendor GST compliance status: Audit the compliance history of top vendors by purchase volume, focusing on filing consistency and registration status.
• Product classification documentation: Request written justification for classification positions on all key products, including any internal or external legal opinions obtained.
• Job work and contract manufacturing agreements: Review all third-party processing arrangements for compliance with challan issuance, return timelines, and input credit treatment.
• Pending notices and departmental correspondence: Require disclosure of all communications from GST and excise authorities, including informal queries that have not yet escalated to formal proceedings.
• State-level levies: Confirm that state-specific obligations—including entry tax, octroi legacy claims, and state excise for applicable industries—have been reviewed separately from central indirect tax compliance.

Structuring the Deal to Manage Residual Risk

Even a thorough pre-closing audit will not eliminate all uncertainty. Historical liabilities in India's tax system can remain latent for years. Acquirers who proceed despite residual risk should consider structuring protections that reflect the specific nature of indirect tax exposure: escrow arrangements sized against identified risk categories, indemnity periods that align with Indian statutory limitation windows rather than standard M&A norms, and representations that specifically address the compliance areas outlined above.

Engaging Indian indirect tax counsel—not merely general corporate counsel—to review the representations and warranties section is a step that is routinely skipped and routinely regretted.

The Cost of Discovering This After Closing

The financial impact of post-closing excise and GST discoveries varies widely, but assessments covering multiple years of manufacturing activity can reach figures that materially affect the economics of a transaction. Beyond the direct financial cost, these discoveries consume management attention, strain relationships with local teams, and complicate the regulatory standing of the newly acquired entity at precisely the moment when operational stability matters most.

For US companies that have invested in India's growth story, the acquisition pathway remains compelling. The due diligence framework, however, needs to be rebuilt around the realities of India's indirect tax environment—not imported from deal processes designed for domestic US transactions.

The liabilities are real. The window to find them is before closing. After that, they belong to you.