Chapter 9 of 12

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CMA Intermediate Direct and Indirect Taxation★ The middle chapters of ICAI Paper 3 Section B, roughly 12 of its 50 marks. Questions three and four of the method chapter's four-question sequence: when does liability arise, and on what value.

GST: Exemptions, Time and Value of Supply

What GST exempts and why, when a taxable supply's liability actually arises — the trigger that fixes the return period — and how much tax is charged on it under the section 15 valuation rule.

⏱ 30 min readHard difficulty✓ Free · exam-pattern aligned

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Timed practiceMCQs from this chapter with instant scoring

FlashcardsFormulas & traps on spaced repetition

CMA Intermediate PYQsSolved previous-year questions

By the end of this chapter you'll be able to…

1Identify the major categories of exempt supply under GST
2Distinguish non-supply, exempt supply and zero-rated supply by their input tax credit consequence
3Apply the time of supply rules for goods and services under both forward charge and reverse charge
4Apply the relaxed advance-receipt rule for goods and the standard rule for services
5Compute value of supply under the transaction value rule, including the specified inclusions and exclusions
6Apply the pre-supply and post-supply discount conditions correctly
7Apply the sequential valuation rules where transaction value cannot be used

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Why this chapter matters in CMA Intermediate

A tax on consumption taken to its logical extreme would tax necessities at the same rate as luxuries, so GST exempts specified categories by notification rather than narrowing the definition of supply itself — the transaction stays within section 7's scope, but no tax is charged and no input credit is available on inputs used to make it. Time of supply then fixes which tax period a confirmed liability falls into, which is what determines the return in which it must be reported. Value of supply, built around transaction value with a defined list of inclusions and exclusions, fixes how much tax is charged. Together these two questions complete the four-question sequence the method chapter opens with.

Before you start — revise these

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GST: Introduction, Supply, Charge and Place of Supply

This chapter assumes a transaction has already been confirmed as a taxable supply and asks when and on what value it is taxed.

GST: Exemptions, Time and Value of Supply

Weightage: The middle chapters of ICAI's Paper 3 Section B, roughly 12 of its 50 marks. Questions three and four of the method chapter's sequence: when does liability arise, and on what value.

Exemptions

Why exemptions exist despite GST's broad base

A tax on the consumption of goods and services would, taken to its logical extreme, tax necessities like unprocessed food, basic healthcare and education at the same rate as luxury goods, which most tax systems regard as regressive and undesirable. GST addresses this not by narrowing the definition of supply, which stays broad, but by exempting specified categories of otherwise-taxable supply through notification — the transaction remains a supply, remains within the scope of section 7, but no tax is actually charged on it, and no input tax credit is available on inputs used to make an exempt supply.

Major categories of exempt supply

Healthcare services by a clinical establishment, an authorised medical practitioner or paramedics, and ambulance services.

Educational services provided by an educational institution to its students, faculty and staff, up to and including higher secondary education (and specified vocational/approved courses), together with certain services supplied to an educational institution.

Services by the Reserve Bank of India, and specified financial services including services by way of extending deposits, loans or advances where the consideration is represented by way of interest or discount (this exemption is narrow — it exempts the interest/discount component specifically, not fee-based financial services generally).

Agricultural services — cultivation, harvesting, threshing, storage or warehousing of agricultural produce, supply of farm labour, and similar services connected to the production of agricultural produce.

Public transport — transport of passengers by non-air-conditioned public transport, and specified categories of transport of goods (including transport of agricultural produce, and goods where the freight does not exceed a specified threshold for a single consignee).

Services by charitable trusts registered under specified provisions, for defined charitable activities.

Renting of residential dwelling for use as residence (renting for commercial or business use, or short-term/commercial residential accommodation, is generally not covered by this specific exemption).

The distinction between exemption, zero-rating and non-supply

This three-way distinction is examined precisely because candidates conflate them, and each has a different consequence for input tax credit:

Non-supply (Schedule III) — outside GST entirely; no question of credit arises because the activity was never within the tax net.

Exempt supply — within GST's scope but no tax charged; input tax credit on inputs used to make the exempt supply is not available and must be reversed if already claimed.

Zero-rated supply (exports, supplies to SEZ) — within GST's scope, taxable in principle, but the rate is effectively nil and input tax credit remains fully available, refundable where accumulated — this is the crucial difference from an ordinary exemption, and it is why exporters are not disadvantaged by making zero-rated supplies the way they would be by making merely exempt ones.

Time of Supply

Why it matters

Time of supply fixes the tax period in which a liability, once established as taxable, must be reported and paid — it answers the third question in the method chapter's sequence, after supply and taxability have already been confirmed.

Time of supply of goods — general rule (forward charge)

The earlier of:

the date of issue of invoice by the supplier (or the last date by which the invoice should have been issued, if issued late); or
the date of receipt of payment.

Date of issue of invoice for goods involving movement is generally required to be issued at or before the time of removal of goods for supply; for goods not involving movement, at or before delivery or when made available to the recipient.

Time of supply of goods — reverse charge

The earliest of: the date of receipt of goods; the date of payment (as entered in the recipient's books, or debited from the bank account, whichever is earlier); or the date immediately following 30 days from the date of issue of invoice by the supplier, if none of the earlier events has occurred.

Time of supply of services — general rule (forward charge)

Where the invoice is issued within the prescribed period (ordinarily 30 days from the date of supply of service, 45 days for specified financial sector suppliers), time of supply is the earlier of the date of invoice and the date of receipt of payment.

Where the invoice is not issued within that prescribed period, time of supply is the earlier of the date of provision of service and the date of receipt of payment.

Time of supply of services — reverse charge

The earlier of: the date of payment (as entered in the recipient's books, or debited from the bank account, whichever is earlier); or the date immediately following 60 days from the date of issue of invoice by the supplier, if payment has not been made by then.

Advance receipts and the treatment relaxed for goods

Receipt of an advance payment ordinarily fixes time of supply at the date of receipt, to the extent of the amount received — but for supply of goods, this rule has been relaxed: most suppliers of goods are not required to pay tax on receipt of advance; tax is payable only at the time of issue of invoice, consistent with the general rule. Advances for services continue to trigger time of supply at the date of receipt.

Value of Supply — section 15

The general rule

Value of supply is the transaction value — the price actually paid or payable for the supply — where the supplier and recipient are not related and price is the sole consideration for the supply.

Inclusions in value

Any taxes, duties, cesses, fees and charges levied under any law other than GST itself (so, for instance, a municipal tax on the transaction is included, but CGST/SGST/IGST charged on the same invoice is not included in the value on which further GST is computed).
Any amount the supplier is liable to pay but which has been incurred by the recipient and not included in the price.
Incidental expenses, including commission and packing, charged by the supplier at the time of or before delivery.
Interest, late fee or penalty for delayed payment of consideration.
Subsidies directly linked to the price, excluding subsidies provided by the Central or State Government (a government subsidy is specifically excluded from being added to value, even where it reduces the price the recipient pays).

Exclusions — discounts

Discount given before or at the time of supply, if duly recorded in the invoice, is excluded from value.

Discount given after the supply is excluded only if: it is established in terms of an agreement entered into before or at the time of supply, and is specifically linked to relevant invoices; and input tax credit attributable to the discount has been reversed by the recipient — post-supply discounts that fail either condition remain part of the value and are taxed.

Where the transaction value rule cannot be applied (related parties, non-monetary consideration, or specified special cases), value is determined sequentially through the valuation rules: open market value of a supply of like kind and quality; if not determinable, the value of supply of goods or services of like kind and quality; if still not determinable, value computed on the basis of cost plus 10% (cost of production or provision plus a notified markup); and finally, a residual, best-judgment method, applied where none of the preceding methods yields a determinable value.

For a supply to a distinct or related person where the recipient is eligible for full input tax credit, the value declared in the invoice is deemed to be the open market value, as a simplifying concession — since the recipient's full credit eligibility means there is no revenue-loss incentive to understate value between related parties in that specific situation.

Key formulas & results

Everything to memorise for the exam hall, in one card. Screenshot this for revision.

Time of supply of goods (forward charge) = earlier of (invoice date or last date it should have been issued) and (date of receipt of payment)

Time of supply of goods (reverse charge) = earliest of (date of receipt of goods), (date of payment), (31 days after supplier's invoice date)

Time of supply of services (forward charge, invoice within prescribed period) = earlier of (invoice date) and (date of payment)

Time of supply of services (forward charge, invoice NOT within prescribed period) = earlier of (date of provision of service) and (date of payment)

Time of supply of services (reverse charge) = earlier of (date of payment) and (61 days after supplier's invoice date)

Value of supply (general rule) = transaction value, where parties unrelated and price is sole consideration

Value inclusions: non-GST taxes/duties, supplier's liability paid by recipient, incidental expenses/commission/packing, interest/late fee/penalty for delayed payment, price-linked subsidies (excluding government subsidies)

Post-supply discount excluded from value only if: agreed before/at time of supply AND linked to specific invoices AND recipient has reversed the corresponding ITC

Fallback valuation sequence: open market value → like kind and quality value → cost plus 10% → residual/best judgment

CMA Intermediate test series

Ready to be tested on this?

GST: Exemptions, Time and Value of Supply shows up in every CMA Intermediate paper — sit a timed one and find out where you actually stand.

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Traps CMA Intermediate sets — and how to dodge them

These are the exact option-traps and misreads that cost marks under negative marking.

WATCH OUT

✗ Treating an exempt supply the same as a non-supply for input tax credit purposes, when only a non-supply avoids any ITC question entirely — exempt supply requires ITC reversal

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WATCH OUT

✗ Confusing zero-rating with exemption; zero-rated supplies retain full ITC eligibility and are refundable, exempt supplies do not

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WATCH OUT

✗ Applying the advance-receipt time of supply rule to goods, when most suppliers of goods are relieved of this and time of supply is fixed by invoice/payment under the general rule instead

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WATCH OUT

✗ Missing the 30/45-day invoice window test for services before choosing which time of supply formula applies

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WATCH OUT

✗ Excluding a post-supply discount from value without checking all three conditions — prior agreement, invoice linkage, and ITC reversal by the recipient

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WATCH OUT

✗ Including CGST/SGST/IGST charged on the invoice within the value on which further GST is computed

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WATCH OUT

✗ Adding a government subsidy to value, when government subsidies are specifically excluded even though other price-linked subsidies are included

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WATCH OUT

✗ Jumping to cost-plus-10% valuation without first checking open market value and like-kind-and-quality value in sequence

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WATCH OUT

✗ Applying the transaction value rule directly to a related-party or non-monetary-consideration transaction without checking whether it can be applied at all

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Exam-pattern practice

PYQ-style questions with full solutions. Work through them as a readiness check — mark yourself honestly and get your gap report at the end.

Readiness check

Are you exam-ready for GST: Exemptions, Time and Value of Supply?

15 problems from this chapter. Try each one, reveal the worked solution, mark yourself honestly — get your gap report at the end.

15 questions~11 min

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

•GST exempts by notification rather than by narrowing supply; the transaction stays a supply, just untaxed
•Non-supply (Schedule III): outside GST entirely, no ITC question at all
•Exempt supply: within GST, no tax charged, ITC on related inputs must be reversed
•Zero-rated supply (export/SEZ): within GST, nil effective rate, ITC remains fully available and refundable
•Time of supply of goods (forward): earlier of invoice date (or required date if late) and payment date
•Time of supply of goods (reverse): earliest of receipt of goods, payment date, 31 days after supplier's invoice
•Time of supply of services (forward): depends on whether invoice was issued within the 30/45-day window — invoice-or-payment if within, service-date-or-payment if not
•Time of supply of services (reverse): earlier of payment date, 61 days after supplier's invoice
•Advances: goods generally relieved of the advance-triggers-liability rule; services still trigger time of supply on receipt
•Value inclusions: non-GST taxes, supplier's costs paid by recipient, incidental charges/packing, delayed-payment interest/penalty, price-linked subsidies (not government subsidies)
•Pre-supply discount on the invoice: always excluded from value
•Post-supply discount: excluded only if pre-agreed, invoice-linked, AND the recipient has reversed the corresponding ITC — all three needed
•Fallback valuation sequence: open market value → like kind and quality → cost plus 10% → residual best judgment
•Related party with recipient eligible for full ITC: invoice value deemed open market value, as a simplifying concession

CMA Intermediate question blueprint

How this topic is asked, tier by tier — so you can prep to the pattern.

Typical weightage: 12

Exam-hall strategy

Battle-tested tips from mentors and toppers for this topic under the sectional clock.

For exemption questions, name the specific category (healthcare, education, financial services, agriculture, public transport) and check its precise scope rather than assuming a broad reading
Explicitly state whether a transaction is a non-supply, exempt, or zero-rated, and give the ITC consequence for each in that terminology
For time of supply, identify forward or reverse charge first, then goods or services, before applying any formula
For services, check the 30/45-day invoicing window explicitly before choosing which of the two forward-charge formulas to apply
State whether an advance relates to goods or services before applying the advance-receipt rule
In value of supply questions, work through the inclusion list item by item as a checklist rather than intuiting the final figure
For discounts, state all three post-supply conditions explicitly even where the facts only require testing one, to show the full test was applied
Check whether the transaction value rule can be applied at all (unrelated parties, price is sole consideration) before computing value, and move to the fallback sequence only if it cannot

Beyond the exam

Where this skill shows up in the job you're competing for — and in life.

Healthcare and educational institutions structure their b…

Healthcare and educational institutions structure their billing carefully around the boundaries of the respective exemptions, since even a small ancillary taxable component can affect their overall GST position

Exporters and businesses supplying to Special Economic Zo…

Exporters and businesses supplying to Special Economic Zones actively choose between the LUT route and the pay-and-refund route based on cash flow, relying on the zero-rating input credit preservation this chapter explains

Time of supply computations directly determine which mont…

Time of supply computations directly determine which monthly or quarterly GST return a transaction must be reported in, making them a routine check in every GST compliance cycle

Post-supply discount structuring

Post-supply discount structuring, particularly year-end volume rebates in distribution arrangements, is a standard area of GST planning and dispute between suppliers and tax authorities over whether all three conditions were genuinely met

Where else this topic is tested

Prepare once, score in every exam that asks it.

CA Final Paper 5 — Indirect Tax Laws, where exemption notifications and valuation rules are examined in greater depth

CMA Intermediate — Indirect Taxation

CS Executive — Tax Laws

GST practitioner certification examinations, where time and value of supply are core computational content

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Questions aspirants ask

Pulled from the Q&A community and mentor sessions.

Because the two categories exist for entirely different policy reasons. Exemption is a deliberate decision that a category of consumption, such as basic healthcare or unprocessed food, should simply not bear GST, full stop, and denying input credit on it is consistent with that decision — if the government wanted the value chain fully relieved of tax including the input side, it would zero-rate rather than exempt. Zero-rating exists for a different reason entirely: to ensure Indian exports are not burdened by domestic tax and remain price-competitive internationally, since GST as a destination-based tax is meant to fall on consumption within India, not on goods consumed abroad after export. Denying input credit on export inputs would embed Indian tax cost into export prices, defeating that purpose, so zero-rating deliberately preserves full input credit and refunds any that accumulates.

Remember that goods received the relaxation and services did not: for goods, an advance received does not by itself trigger time of supply, and liability instead follows the ordinary invoice-or-payment rule applied to the eventual transaction; for services, an advance received still triggers time of supply immediately, to the extent of the amount received, under the unmodified general rule. If a fact pattern describes an advance for goods, look past it to the eventual invoice date under the general rule; if it describes an advance for a service, that advance date itself is very likely the answer.

No. The ordinary period within which an invoice must be issued for supply of services is 30 days from the date of supply of the service, but a longer period of 45 days applies to specified financial sector suppliers such as banks and financial institutions, recognising the more complex reconciliation and documentation involved in many financial services transactions. A candidate should apply 30 days as the default and only use 45 days where the fact pattern specifically identifies a financial sector supplier of the kind the longer period is meant for.

No, and this is a deliberately simpler test than the one for post-supply discounts. A discount given before or at the time of supply is excluded from value provided it is duly recorded in the invoice — that single condition suffices, with none of the further requirements, prior agreement, invoice linkage and ITC reversal by the recipient, that apply to a post-supply discount. The stricter conditions for post-supply discounts exist because a discount granted after the fact carries a greater risk of being used to artificially deflate declared value after the transaction has already occurred and been recorded, whereas a discount shown transparently on the original invoice presents no such risk and is accepted at face value.