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HomeGuidesGST Discounts Guide
FY 2025-26 · AY 2026-27
Updated August 2026

Comprehensive Guide to Valuation of Supply under GST: Discounts ExplainedUnderstand how discounts impact GST valuation for FY 2025-26

Explore the nuances of how discounts affect the valuation of supply under GST. Learn about pre-supply and post-supply discounts, their conditions, and implications.

Guide Contents
1

Valuation of Supply under GST: Discounts


2

FAQs on GST Discounts

Valuation of Supply under GST: Discounts

Under the GST regime, discounts play a crucial role in determining the taxable value of supply. Section 15 of the CGST Act, 2017, outlines the conditions under which discounts can be excluded from the taxable value.

  1. Pre-Supply Discounts

    Discounts given before or at the time of supply can be deducted from the transaction value, provided they are mentioned in the invoice.

    • Must be clearly mentioned in the invoice.

    • Example: A 10% discount on goods worth ₹5,000 results in a taxable value of ₹4,500.

    • Applicable for both trade and cash discounts.

  2. Post-Supply Discounts

    These discounts are allowed only if they are agreed upon before the supply and linked to the specific invoice.

    • Must be part of a prior agreement.

    • Recipient must reverse the input tax credit proportionate to the discount.

    • Example: A 5% discount agreed upon for early payment can be deducted if linked to the invoice.

  3. Cash Discounts

    Cash discounts are treated similarly to trade discounts under GST.

    • Must be mentioned in the invoice or prior agreement.

    • Example: A 2% cash discount on ₹10,000 reduces the taxable value to ₹9,800.

    • Can be deducted if conditions are met.

  4. Ad-hoc Discounts

    Discounts not pre-agreed or documented cannot be deducted from the taxable value.

    • Not eligible for deduction if not pre-agreed.

    • Example: A sudden 3% discount offered post-supply cannot reduce the taxable value.

    • Must have formal documentation to qualify.

Understanding the treatment of discounts under GST is essential for accurate tax compliance and optimizing the taxable value of supplies.

FAQs on GST Discounts

What is the impact of pre-supply discounts on GST?

Pre-supply discounts reduce the taxable value of supply if mentioned in the invoice. For example, a 15% discount on goods worth ₹2,000 results in a taxable value of ₹1,700.


Are post-supply discounts always deductible under GST?

No, post-supply discounts are deductible only if they were agreed upon before supply and linked to a specific invoice. The recipient must also reverse the input tax credit proportionate to the discount.


How are cash discounts treated under GST?

Cash discounts are treated like trade discounts. They can be deducted from the taxable value if mentioned in the invoice or a prior agreement.


Can ad-hoc discounts be deducted from the taxable value?

No, ad-hoc discounts that are not pre-agreed or documented cannot be deducted from the taxable value under GST.


What documentation is required for post-supply discounts?

Post-supply discounts require a prior agreement and must be linked to the specific invoice. The recipient must reverse the input tax credit proportionate to the discount.


How do discounts affect input tax credit?

For post-supply discounts, the recipient must reverse the input tax credit proportionate to the discount to claim it as a deduction from the taxable value.


Is there a difference in treatment between cash and trade discounts?

No, both cash and trade discounts are treated similarly under GST, provided they meet the necessary conditions for deduction.


What happens if a discount is not mentioned in the invoice?

If a discount is not mentioned in the invoice, it cannot be deducted from the taxable value of the supply.


How does GST affect the valuation of supply with discounts?

GST affects the valuation by allowing deductions for certain discounts, thereby reducing the taxable value and the GST payable.


What section of the CGST Act governs discounts?

Section 15 of the CGST Act, 2017, governs the treatment of discounts in the valuation of supply under GST.

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