Interarch Building Solutions Limited received a GST notice dated October 1, 2026, with a potential liability of ₹8.29 crore related to fiscal year 2023 discrepancies.

The notice was issued by the Assistant Commissioner of GST in Mohali-1, Punjab. It cites violations under Section 73(1) of the Central Goods and Services Tax Act 2017. The company disclosed this development to stock exchanges in compliance with SEBI Listing Regulations.

Nature of the Alleged Violation

The tax authority issued a DRC-01 notice highlighting two primary issues for FY23:

• Mismatch between sales declared in GSTR-1 and e-way bills issued.
• Input Tax Credit (ITC) claimed on supplies falling under Section 17(5) blocked credit categories.

Breakdown of Potential Liability

The total quantifiable impact on financial operations is estimated at ₹8,29,76,414.10. The liability comprises basic tax, interest, and penalty components as detailed below:

What the Numbers Show

The penalty component represents approximately 10% of the basic tax demand, while interest accounts for roughly 72% of the base amount. This structure indicates that the majority of the financial exposure stems from the time value of money accrued since the original transaction period in FY23, rather than punitive measures alone.

Interarch Building Solutions has received a confirmed work order worth ₹89 crore from a domestic client for the design, engineering, manufacturing, supply, and erection of Pre-Engineered Steel Building (PEB) systems for a Data Centre. The order includes a 15% advance and an execution timeline of approximately 10 months.

Order Financial Context

The ₹89 crore order represents a significant addition to the company's backlog. While trailing 12-month consolidated revenue data is not available in the provided context to calculate precise book-to-bill ratios or quarterly coverage, the order size is substantial relative to typical per-order values seen in recent quarters. The inclusion of a 15% advance mitigates initial working capital stress. The total disclosed order book across the last three fiscal quarters sums to ₹2065 crore (sum of the 16 orders disclosed across the last 3 fiscal quarters shown in the table below), indicating a robust pipeline.

Company Order Track Record

Order inflow velocity has been high, with Q1FY27 recording ₹1854 crore across 14 orders, followed by ₹211 crore in Q2FY27 so far. The current ₹89 crore order is consistent with the mid-range ticket sizes observed in recent filings, which have ranged from ₹58 crore to ₹375 crore. The majority of recent clients remain undisclosed due to commercial confidentiality clauses.

Execution and Revenue Quality

Consolidated quarterly revenue and profit data for the last three quarters are not available in the provided input. Consequently, trends in Operating Profit Margin (OPM) and net profit conversion rates cannot be assessed from the latest quarterly figures. Historical standalone data indicates positive growth trajectories, but specific quarterly execution metrics are missing.

Revenue Growth: Order Wins Translating to Revenue

As Interarch Building Solutions has sustained order wins, with significant inflows in FY26 and FY27, its annual standalone revenue has grown from ₹333.6 crore in FY22 to ₹786.4 crore in FY26, representing a YoY growth of 30.7% based on the latest annual data. The consistent order book expansion aligns with the multi-year revenue growth trend visible in the standalone financials.

Working Capital and Execution Capacity

Balance sheet and cashflow data required to assess current ratios, total liabilities/equity, and operating cashflow conversion are not provided in the input. Therefore, liquidity metrics and working capital cycle assessments cannot be performed. The 15% advance on this specific order provides immediate cash inflow, supporting execution costs.

What to Watch

• Execution Rate: Monitor quarterly revenue run-rate against the ₹2065 crore disclosed order book to assess conversion speed.
• Margin Quality: Watch for OPM trends on new data centre projects compared to historical averages once quarterly data becomes available.
• Client Concentration: Most recent orders are from undisclosed clients; monitor future disclosures for concentration risks if any single client exceeds 40% of the order book.
• Advance Terms: Track the impact of advance payments (15% here, 10-20% in others) on working capital requirements.

Key Observations

• Backlog Signal: Total disclosed order book of ₹2065 crore over 3 quarters indicates strong demand visibility.
• Valuation check (as of 30 Sep 2026): P/E of 21.2x against ROCE of 20.91%. At the time of this article, valuation was pricing in execution improvement not yet visible in return ratios.
• Contract structure: This is a confirmed work order (Type A). Revenue recognition begins upon delivery milestones as per standard accounting policies.