The Madras High Court tax regime change contract ruling clarifies that government contractors can recover additional GST paid because of the shift from the VAT regime to the GST regime when the change occurred after their contracts were awarded. The Court held that the Greater Chennai Corporation must reimburse the extra GST liability incurred by Sakthi Constructions for work executed after GST came into force on July 1, 2017.
Background
Sakthi Constructions secured government contracts from the Greater Chennai Corporation when the VAT regime governed indirect taxation. After GST replaced VAT on July 1, 2017, the contractor became liable to pay GST on the remaining work under those existing contracts. The contractor requested reimbursement of the additional tax burden. However, the Corporation rejected the claim, arguing that the contractor neither sought a price adjustment during execution nor raised the issue until after completion of the contracts.
Arguments Before the Court
Sakthi Constructions argued that the transition from VAT to GST substantially increased its tax liability. It relied on Clause 43.2 of the General Conditions of Contract and the State Government’s G.O.Ms. No. 296 dated October 9, 2017. According to the contractor, these provisions required the Corporation to bear the additional tax resulting from the change in law.
The Corporation maintained that the contractor had delayed its claim and therefore had no right to seek reimbursement after completing the works.
Section 64A of the Sale of Goods Act and Tax Changes
The Court examined the principle contained in Section 64A of the Sale of Goods Act, 1930. The provision states that if taxes increase or decrease after parties enter into a contract but before its completion, the contract price should adjust accordingly unless the contract provides otherwise.
This rule acts as a default mechanism for allocating the financial impact of tax changes. Parties remain free to alter this arrangement through express contractual terms. Courts have also applied the principle to construction and supply contracts when tax laws change during contract performance. They have done so even if the agreement does not expressly mention Section 64A, provided the contract includes a price adjustment clause for tax variations.
However, courts have distinguished Section 64A from the anti-profiteering provisions under Section 171 of the CGST Act. Unlike Section 64A, Section 171 creates a statutory obligation requiring suppliers to pass on tax benefits to consumers.
Court’s Findings on GST Reimbursement
Justice C. Saravanan held that Clause 43.2 required adjustment of the contract price whenever taxes changed during the execution period. The Court found that this clause reflected the principle embodied in Section 64A.
The Bench ruled that the GST regime introduced on July 1, 2017 increased the contractor’s tax burden. As a result, Sakthi Constructions became entitled to reimbursement even though the contracts predated GST. The Court also relied on Clause 6 of G.O.Ms. No. 296. That Government Order states that suppliers should collect GST from purchasers while raising invoices and remit it to the Government. Consequently, the purchaser ultimately bears the tax burden.
The Madras High Court tax regime change contract decision therefore confirmed that contractual price adjustment clauses can protect contractors from unforeseen tax changes introduced during contract execution.
Retention Amounts and Audit Objections
The Court also ruled that the Greater Chennai Corporation could not withhold retention amounts merely because audit objections remained pending. It observed that retention money must be released unless the authority identifies a specific contractual basis for adjusting or withholding the amount. Pending objections raised by the Accountant General, by themselves, did not justify withholding payment.
Price Escalation Claims
The Bench declined to decide the contractors’ price escalation claims. It found that those claims involved disputed questions of fact. Accordingly, the parties must resolve them through the contractual dispute resolution mechanism instead of writ proceedings.
Outcome
The Madras High Court directed the Greater Chennai Corporation to reimburse the additional GST paid because of the VAT-to-GST transition. It also ordered the Corporation to refund the retention amounts with commercial interest. However, it left the contractors free to pursue their separate price escalation claims under the dispute resolution procedure provided in the contract.
Significance
The judgment provides important guidance for government contracts that continued through the 2017 GST transition. It confirms that contractual price adjustment clauses can incorporate the principle underlying Section 64A even if the contracts predate GST. The ruling also strengthens the principle that pending audit objections alone cannot justify withholding undisputed contractual dues. At the same time, it distinguishes reimbursement claims arising from tax changes from price escalation disputes, which generally require resolution through the agreed contractual mechanism.

