US Corporate Tax vs Indian Corporate Tax – The Compliance Gap MNCs Consistently Underestimate
When Indian tax professionals advise clients expanding into the United States, the conversation almost always begins with the federal corporate rate — 21% under the Tax Cuts and Jobs Act 2017. This is a reasonable starting point. It is, however, an incomplete one.
India’s corporate tax compliance operates through a unified federal framework. A domestic company files ITR-6, covering its entire Indian operations regardless of how many states it operates in. There is no sub-national corporate income tax return. The Income Tax Act applies uniformly across all 28 states and 8 union territories.
The United States works very differently.
The SALT Reality
State and Local Tax (SALT) in the US is not a single concept. It is an aggregation of structurally distinct tax types that a company may encounter depending on where it has nexus:
Corporate Income Tax (CIT) applies in most states and is broadly analogous to what Indian professionals would recognise as corporate tax — levied on net income after apportionment. Each state uses its own apportionment formula, which may be single-sales-factor, three-factor (property, payroll, sales), or a hybrid. California, New York, and Illinois are CIT states with significant compliance obligations.
Gross Receipts Tax (GRT) is structurally different — it is levied on gross revenue rather than net income. Importantly, while GRTs are not income-based in nature, their federal and state deductibility treatment is not uniform and depends on the specific context and characterisation. Ohio’s Commercial Activity Tax, New Mexico’s Gross Receipts Tax, and Washington’s Business and Occupation Tax are examples. The key practitioner point is that a loss-making entity may still owe GRT — there is no profit offset in the base computation.
Franchise and Margin Tax takes different forms by state. Texas imposes a Franchise Tax computed on a margin base — revenue minus the greatest of cost of goods sold, compensation, or 30% of revenue — which bears little resemblance to a conventional income tax. Tennessee imposes a Franchise Tax based on the greater of net worth or real and tangible property in the state, alongside a separate Excise Tax on net income. These are distinct regimes and should not be conflated under a single label.
Two Concepts Indian Practitioners Often Miss Entirely
P.L. 86-272 is a federal statute that prohibits states from imposing a net income tax on a company whose only in-state activity is the solicitation of orders for tangible personal property, where those orders are approved and fulfilled from outside the state. For Indian-origin companies selling goods into the US, this protection can be significant — but it has meaningful limitations. It does not apply to services, digital products, or software delivered electronically. Several states have issued guidance narrowing its scope in the context of internet-based activities. Practitioners advising technology or services companies cannot rely on P.L. 86-272 as a blanket shield.
Unitary Combined Reporting is perhaps the most consequential concept absent from most cross-border advisory conversations. Many US states require or permit combined reporting, where commonly controlled entities conducting a unitary business file a single combined return reflecting the aggregate income and apportionment of the group. For an Indian MNC with multiple US subsidiaries, this means the state tax base may be computed at a group level — not entity by entity. California, for instance, provides for worldwide combined reporting as a default, though in practice most multinationals make a water’s edge election — limiting the combined group to US-based entities and certain foreign affiliates with significant US activity. The practical implication is that an entity-level effective tax rate analysis prepared for Indian GAAP or Ind AS 12 purposes may materially understate the actual state tax exposure of the group.
Nexus and Economic Thresholds Post-Wayfair
Following the Supreme Court’s decision in South Dakota v. Wayfair (2018), economic nexus became the dominant nexus standard across most states. However, the specific thresholds and tests vary materially by state and continue to evolve. The $100,000 sales threshold is broadly representative, but several states have since eliminated transaction-count tests, adjusted dollar thresholds, or introduced factor-presence nexus standards that operate differently from the Wayfair framework. Practitioners should verify current thresholds for each relevant state rather than applying a uniform rule.
Estimated Tax Schedules
State estimated tax due dates do not follow a single uniform schedule. While some states broadly align their installment dates with federal quarters, many states set their own schedules, safe harbor thresholds, and underpayment interest rates independently. Managing estimated payments across 15+ jurisdictions requires state-specific tracking — a general federal safe harbor assumption will not hold across all states.
A Note for Practitioners
When advising Indian promoters or finance teams on US market entry, the compliance budget conversation should happen before the entity formation conversation. The questions are not only “what rate will apply” but also: in how many states will we have nexus, under what tax type, does P.L. 86-272 offer any protection, and does the group have a unitary combined reporting exposure? The answers often surprise clients — and occasionally surprise advisors too.
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