Advanced Input Tax Credit and GST Liability Computation — Practice

Question 1

A registered person incurs GST on a common input service used for both taxable and exempt supplies during a tax period. Total turnover for the period is a specified amount, of which a specified, smaller amount is exempt turnover. Explain the formula used to determine how much of the common credit must be added back to output tax liability, and why the mechanism adds back an amount rather than simply denying the exempt-attributable credit at source.

Accepted Answer

The common credit attributable to exempt supplies is determined by applying the ratio of exempt turnover to total turnover for the period to the total common credit, and this exempt-attributable portion is added back to output tax liability for that period, rather than simply never being claimed in the first place, because at the point the input service is received, it is often not possible to segregate in advance exactly how much of it will end up supporting exempt supplies versus taxable supplies; the practical approach is therefore to allow the full common credit to be provisionally availed, and then to reverse (add back) the exempt-attributable portion once turnover figures for the period allow this apportionment to actually be computed. This add-back mechanism achieves the same substantive outcome as denying the credit at source, restricting the taxpayer to only the credit genuinely attributable to taxable supplies, while remaining administratively workable given that the apportionment can only be computed after the fact, once the period's turnover figures are known.

Question 2

A business acquires a machine used for both taxable and exempt supplies, availing full credit on acquisition. Explain why the exempt-attributable portion of this credit is not reversed entirely in the period of acquisition, but instead spread across several subsequent tax periods, and what this implies about how a candidate should structure a numerical answer covering multiple periods.

Accepted Answer

Because a capital good is used over an extended useful life rather than consumed within a single tax period, the law spreads the reversal of its exempt-attributable common credit across a specified number of tax periods corresponding to that useful life, recomputing the exempt-to-total turnover ratio for each individual period and adding back a proportionate amount of the capital good's credit in that specific period, rather than reversing the entire exempt-attributable estimate as a single lump sum in the period of acquisition; this better reflects that the capital good's actual mix of taxable and exempt use may itself vary somewhat from period to period across its useful life, rather than being fixed once and for all at acquisition. For a numerical answer spanning multiple periods, a candidate should therefore set up a separate row or computation for each relevant tax period, applying that period's own specific exempt-to-total turnover ratio to the same underlying capital-goods credit amount, rather than treating the entire reversal as a single, one-time calculation the way input or input-service apportionment is handled.

Question 3

A registered person avails input tax credit on an invoice but fails to pay the supplier the invoice value along with tax within the prescribed period. Explain the consequence, and whether this credit is permanently lost.

Accepted Answer

The credit availed on this invoice must be reversed, added back to output tax liability along with applicable interest, since the underlying policy of input tax credit is to track a genuine, paid-for supply chain, and credit availed on an invoice that remains unpaid beyond the prescribed period does not reflect this genuine payment. This credit is not permanently lost, however; once the registered person subsequently pays the supplier the outstanding invoice value along with tax, the credit can be re-availed, since the reversal is specifically a timing-linked consequence tied to the temporary non-payment, not a permanent denial of credit that was, in substance, genuinely eligible once the underlying payment is actually made.

Question 4

A business writes off obsolete inventory on which input tax credit was availed at the time of purchase. Explain why this write-off requires a reversal of the previously availed credit.

Accepted Answer

Input tax credit is available only in respect of inputs used or intended to be used in the course or furtherance of business for making taxable supplies, and once inventory is written off as obsolete, it is, by definition, no longer going to be used to make any further taxable supply at all; the eligibility condition credit was originally availed under (use for taxable business purposes) is no longer satisfied once this specific subsequent development occurs. The credit attributable to this written-off inventory must therefore be reversed, added back to output tax liability, reflecting that continuing to retain credit on inventory that will never actually contribute to a further taxable supply would leave the taxpayer with a credit benefit entirely disconnected from any genuine future taxable output it was meant to support.

Question 5

A registered person is liable to pay GST under reverse charge on a specified inward supply for a tax period, and separately holds a substantial balance of input tax credit in the electronic credit ledger from other transactions. The person proposes to discharge the reverse-charge liability by utilising this available credit balance. Evaluate this proposal.

Accepted Answer

This proposal is incorrect. Liability under reverse charge must be discharged in cash, through the electronic cash ledger, and cannot be discharged by utilising input tax credit available in the electronic credit ledger, regardless of how substantial that available credit balance is; only once the reverse-charge tax has actually been paid in cash does the recipient become eligible to then claim input tax credit on that same reverse-charge payment (subject to the ordinary eligibility conditions), which can then be used to offset the recipient's own separate output tax liability on outward supplies. Allowing reverse-charge liability to be discharged directly out of existing credit would undermine the specific reason reverse charge exists, ensuring the tax on specified categories of supply is genuinely, affirmatively paid into the government's hands by the recipient, rather than being merely a paper adjustment against an unrelated credit balance the recipient happens to already be holding.

Question 6

A registered person has available balances of integrated tax credit, central tax credit and state tax credit at the start of a tax period, and separately has integrated tax, central tax and state tax output liabilities for that period. Explain the general principle governing the order in which these credit balances must be utilised against these liabilities, and why getting this sequence wrong can produce an incorrect final cash-payable figure even if every individual liability and credit figure was itself computed correctly.

Accepted Answer

Integrated tax credit must first be fully utilised against integrated tax liability, and any remaining balance of integrated tax credit must then be utilised against central tax liability and state tax liability, in a specific sequence the law prescribes, before central tax credit or state tax credit are applied at all; only once integrated tax credit has been exhausted in this prescribed manner do central tax credit and state tax credit come into play, each applied first against their own respective liability and then, where a balance remains, cross-utilised against the other in the specific manner the law separately permits (central tax credit cannot be used against state tax liability, and state tax credit cannot be used against central tax liability, reflecting that these are separate, non-fungible tax heads collected by different levels of government). Getting this sequence wrong, for instance applying state tax credit against central tax liability before integrated tax credit has been fully exhausted against every liability it is required to first be applied to, produces an incorrect final cash-payable figure despite every underlying liability and credit figure being individually accurate, because the utilisation order is itself a substantive, examinable rule determining which specific credit balance offsets which specific liability, not a mechanical afterthought that can be varied without consequence.

Question 7

A company's head office, registered in one state, receives an invoice for a common advertising campaign that promotes the company's products sold through its branches registered in several other states. Explain why the head office cannot simply retain and use the full credit on this invoice itself, and what mechanism addresses this situation.

Accepted Answer

The head office cannot simply retain and use the full credit on this invoice itself because the benefit of this advertising campaign was genuinely consumed across the company's several branches in different states, not solely at the head office's own location, and the head office's own outward taxable supplies (if any) may bear little or no genuine relationship to the specific branches whose sales this advertising campaign actually supported; retaining the entire credit at the head office would leave it trapped against a registration that may have comparatively little taxable output of its own to offset it against, while the branches that genuinely benefited from the campaign receive none of the corresponding credit. The Input Service Distributor mechanism addresses this by allowing the head office, registered specifically as an ISD, to distribute this credit to its recipient branches through a specific ISD invoice, apportioned according to a prescribed formula generally based on each branch's own turnover relative to the aggregate turnover of all recipient branches, ensuring the credit ends up allocated to the specific registrations that genuinely benefited from the underlying input service.

Question 8

Outline the correct sequence a candidate should follow to compute a registered person's net GST payable in cash for a tax period, given output tax on outward supplies, a reverse-charge liability, and a mix of eligible and blocked common credit requiring apportionment.

Accepted Answer

The correct sequence is: first, compute total output tax liability across all outward taxable supplies at their correct rates; second, separately identify and set aside the reverse-charge liability, since this portion must be discharged in cash and cannot be offset by credit; third, compute total input tax credit available for the period, excluding blocked credits under the specific blocked-credit list; fourth, apply the apportionment formula to any common credit relating to mixed taxable-and-exempt use, adding back the exempt-attributable portion to output liability; fifth, apply any further reversal triggers arising in the period (non-payment to a supplier beyond the prescribed period, write-off, or exempt use of previously credited goods); sixth, arrive at the net eligible credit available for the period; and finally, apply this net credit against output tax liability (excluding the reverse-charge component, which remains payable in cash regardless) following the prescribed order of utilisation across integrated, central and state tax heads, with whatever liability remains after this utilisation, plus the separately identified reverse-charge liability, payable in cash through the electronic cash ledger. Following this sequence in this specific order, rather than netting credit against total liability (including reverse charge) in one undifferentiated step, is what produces a correct final cash-payable figure.

Question 9

A company runs a car dealership and also separately operates an in-house fleet of cars, with a seating capacity of five each including the driver, used solely to transport its own administrative staff between offices. Explain the credit position on cars purchased for each of these two purposes.

Accepted Answer

Credit on motor vehicles for transport of persons with an approved seating capacity of up to thirteen persons including the driver is generally blocked, but this block does not apply where such vehicles are used for making a further taxable supply of such vehicles, meaning the car dealership's own purchase of cars for resale to its customers is not blocked credit at all, since the dealership is making a further supply of these very vehicles, precisely the situation the exception to the general block is designed to cover. The company's separate in-house fleet used solely to transport its own administrative staff, however, falls squarely within the general block, since this use is neither a further supply of the vehicles themselves nor one of the other specific exceptions (such as transportation of passengers as a business, or use for driver training), and credit on these administrative-fleet vehicles is accordingly blocked despite the vehicles being genuinely used for the company's own business purposes.

Question 10

A manufacturing company engages a contractor to construct a new factory building on its own account, and separately engages a contractor to install specific production machinery that will be bolted to the factory floor. Explain the credit position on each works contract service.

Accepted Answer

Credit on works contract services for construction of an immovable property is generally blocked where the property is constructed on the taxpayer's own account, since such construction is treated as creating an immovable asset for the taxpayer's own use rather than for further supply, and the taxpayer capitalises this cost rather than passing it forward as part of a further taxable supply chain; the company's factory building, being immovable property constructed on its own account, falls within this general block, and credit on the works contract service for constructing the building is accordingly denied. The specific production machinery, by contrast, falls within the plant and machinery exception to this general block, since plant and machinery is specifically defined to include apparatus, equipment and machinery fixed to earth by foundation or structural support that is used for making outward supplies, and is specifically excluded from the block even though the machinery is also, in a loose physical sense, being fixed to the factory floor; credit on the works contract service for installing this machinery is accordingly available, illustrating that the plant and machinery exception turns on this specific statutory definition rather than on any general test of whether an item is physically attached to land or a building.

Question 11

A registered person acquires a capital good used exclusively for making exempt supplies, and does not avail any credit on it at acquisition. Two years later, the person begins using the same capital good exclusively for making taxable supplies. Explain whether any credit can now be claimed, and how it would be computed.

Accepted Answer

Where a capital good was used exclusively for exempt supplies (or exclusively for non-business purposes) and no credit was availed at acquisition, and the capital good is subsequently used exclusively for taxable supplies, credit can be claimed on this capital good at this later point, but not for the full original tax paid; the credit is computed after reducing the original tax paid by a prescribed percentage per quarter (or part of a quarter) that has elapsed from the date of the original invoice to the date this capital good is put to this new, exclusively-taxable use, reflecting that the capital good has already been in use for a period during which it earned no credit entitlement, and only the remaining, un-utilised portion of its value (proportionate to its remaining useful life) is treated as now becoming credit-eligible, rather than allowing the full original tax amount to suddenly become available as fresh credit as though the intervening two years of exempt use had not occurred.

Question 12

A principal sends inputs to a job worker without payment of tax, but the job worker does not return the processed goods, nor does the principal supply them directly from the job worker's premises, within the prescribed period from the date the inputs were sent out. Explain the GST consequence of this failure.

Accepted Answer

Where inputs sent to a job worker are not received back by the principal, nor supplied from the job worker's place of business, within the prescribed period, this failure is deemed to constitute a supply by the principal to the job worker, effective from the date the inputs were originally sent out, meaning the principal becomes liable to pay GST on this deemed supply as though it were an ordinary outward supply of those inputs. This deeming provision exists to prevent the specific relief this paper's job-work movement provisions grant (allowing goods to move to a job worker without GST on the movement itself) from being used as an indefinite, tax-free parking arrangement for goods that never actually return to the principal or get supplied onward from the job worker's premises within a reasonable, prescribed period.

Question 13

A registered person holds a valid tax invoice and has received the goods described in it, but the supplier has not actually deposited the tax charged on that invoice with the government. Explain the credit consequence for the recipient in this scenario.

Accepted Answer

Possession of a valid tax invoice and receipt of the goods or services are two of the specific conditions required to claim input tax credit, but they are not the only conditions; credit is also conditional on the tax charged in respect of the supply having actually been paid to the government, whether in cash or through utilisation of admissible credit, and on the recipient having furnished the return. Where the supplier has not actually deposited the tax charged with the government, this specific condition is not satisfied, and the recipient's credit claim on this invoice is at risk of being disallowed (or, where already claimed, of being subject to reversal along with applicable interest) despite the recipient itself having done everything within its own control correctly, holding a valid invoice and having genuinely received the goods; this is precisely why practical GST compliance places such emphasis on dealing with compliant, reliable suppliers, since a recipient's own credit position can be affected by a supplier's separate default that the recipient may have no direct visibility into or control over at the time the credit is claimed.

Question 14

Explain the difference between the Input Service Distributor mechanism and a cross-charge arrangement, where a company's head office renders a genuine internal service (such as centralised management or IT support) to its own branches, rather than merely receiving and distributing a third-party invoice.

Accepted Answer

The Input Service Distributor mechanism specifically distributes credit the head office has itself received from an external, third-party supplier on an input service that benefited multiple branches, and does so purely as a credit-distribution mechanism, without the head office itself being treated as supplying anything to its branches. A cross-charge arrangement, by contrast, addresses a different situation: where the head office itself renders a genuine service (such as centralised management, common IT infrastructure, or shared administrative functions) to its own branches, using its own resources and personnel rather than merely passing through a third-party invoice, this is treated as a deemed supply of service by the head office to each branch under Schedule I (since the head office and each branch are distinct persons), requiring the head office to raise its own invoice (a cross-charge) valuing this internally rendered service and charging GST on it accordingly, which the recipient branch can then itself claim as credit in the ordinary way. The key distinction is whether the head office is merely distributing credit on an externally procured, common input service (ISD) or is itself the actual supplier of a genuinely internally rendered service to its branches (cross-charge), and a business using the ISD mechanism where a cross-charge is actually required, or vice versa, would be applying the wrong compliance mechanism to the underlying transaction.

Question 15

A banking company providing services partly by way of accepting deposits, extending loans, or advances, is entitled to a specific optional simplification for claiming input tax credit rather than performing the ordinary apportionment computation each period. Explain what this option is and why it exists specifically for this category of taxpayer.

Accepted Answer

A banking company or a financial institution engaged in supplying services by way of accepting deposits, extending loans or advances has the option, instead of applying the ordinary apportionment formula for credit relating to taxable and exempt supplies, to avail a flat fifty percent of the eligible input tax credit on inputs, capital goods and input services in that period, with the remainder simply lapsing, and this specific option, once exercised for a financial year, cannot ordinarily be withdrawn during the remaining part of that financial year. This simplified option exists specifically for this category of taxpayer because a bank's or financial institution's own transactions typically involve an extremely large volume of individually small-value taxable and exempt supplies (interest-bearing loans being exempt, various fee-based services being taxable), making a precise, transaction-level or even period-level apportionment computation genuinely burdensome to perform accurately at this volume, and a flat, simplified fifty percent option offers such institutions a practical, administratively simpler alternative to the ordinary apportionment formula's own more precise but more burdensome computation.

Practice — Advanced Input Tax Credit and GST Liability Computation

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