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CGST Act Section 15: Value of taxable supply | Finin2min

Section 15 - Value of taxable supply

Chapter IV - Time and Value of Supply
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Source control: The text/status on this page is tied to the official source gateway and the Phase 1 legal-review register. Open official source.

Finin2min Summary - Section in 2 Minutes

Starts with transaction value for unrelated parties and sole consideration, then adds statutory inclusions, discount conditions and valuation rules. Non-GST taxes and supplier liabilities borne by recipient are included. Incidental expenses and pre-delivery activities charged by supplier are included. Delayed-payment interest/late fee/penalty is included on receipt. Price-linked non-government subsidy is included. Post-supply discount requires pre-existing agreement, invoice linkage and recipient ITC reversal. Related/distinct-person and notified supplies move to rules 27-35/31B-31D.

Exact operative text

Paragraph-wise decode

Starts with transaction value for unrelated parties and sole consideration, then adds statutory inclusions, discount conditions and valuation rules. Non-GST taxes and supplier liabilities borne by recipient are included. Incidental expenses and pre-delivery activities charged by supplier are included. Delayed-payment interest/late fee/penalty is included on receipt. Price-linked non-government subsidy is included. Post-supply discount requires pre-existing agreement, invoice linkage and recipient ITC reversal. Related/distinct-person and notified supplies move to rules 27-35/31B-31D.

Section-Rule-Form-Notification bridge

The mapping is a legal concordance, not a round-robin related-link list. It is limited to instruments certified in this phase.

Practical example

A customer pays a statutory fee that the supplier was contractually liable to bear. The amount is added to value even if paid directly to the authority. PROFESSIONAL ALERT Commercial credit notes do not automatically reduce GST value.

F2 Finin2min · Finance & Law Explained in 2 Minutes GST BARE ACT & RULES SERIES · CHAPTER V CGST Act, 2017 Input Tax Credit ITC conditions, blocked credits, reversals, special circumstances, job work, mandatory ISD distribution and recovery. Legal cut-off: 28 June 2026 India Code Act: as on 11 June 2026 Sections 16, 17, 18, 19, 20, 21 Edition GST26

Legal snapshot Decision flow Act sections Rules Notifications & circulars Cases Q&A Sources

Legal snapshot ACT COVERAGE CGST Act sections 16-21 6 statutory provisions. RULES COVERAGE 12 Rules mapped in the chapter with official active-rule links and amendment controls. REPOSITORY LAYER 9 case studies · 15 Q&A Official sources, examples, alerts and cheat framework. Legal control: The current Act source is the India Code consolidation marked as on 11 June 2026. Rules are controlled through active CBIC pages and Gazette instruments up to 28 June 2026; the official 1 June 2021 compilation is used only as a stable full-text base where no later material amendment affects the rule. The Gazette and applicable State law prevail. Senior finance & tax decision flow 1 Confirm registered person and business nexus ↓ 2 Verify tax document and GSTR-2B ↓ 3 Prove receipt and tax/return conditions ↓ 4 Test section 17(5) blocks ↓ 5 Allocate taxable/exempt and business/non-business use ↓ 6 Track 180-day payment ↓ 7 Apply November/annual-return time limit

↓ 8 Process special stock/job-work/ISD rules ↓ 9 Reconcile books, 2B, 3B and vendor compliance Act - paragraph-by-paragraph The statutory text is followed by a practical interpretation layer. Examples illustrate application; they do not replace transaction-specific facts or binding law.

Professional alert

Confirm the transaction-date amendment and commencement position before reliance.

Implementation checklist

  1. Fix the transaction, taxable period and jurisdiction.
  2. Read every subsection, proviso, explanation and omission marker.
  3. Open the mapped Rule, form, notification and circular.
  4. Test State/UT variation and portal version.
  5. Preserve evidence, approvals, working papers and acknowledgements.
  6. Record the conclusion, assumptions, source date and reviewer.

Evidence and retention checklist

Practical Q&A

What does section 15 regulate?
It regulates value of taxable supply. Read the exact text, conditions, exceptions and transaction date together.
Which subordinate law should be checked?
Rule 27, Rule 28, Rule 29, Rule 30, Rule 31, Rule 31A, Rule 31B, Rule 31C, Rule 31D, Rule 32, Rule 33, Rule 34. Notifications, circulars, forms and the corresponding SGST/UTGST layer may also apply.
What evidence should be retained?
Preserve the contract or transaction record, invoice or form, portal acknowledgement, payment/ledger evidence, correspondence, legal working and the official source version used.
Can portal behaviour override the statute?
No. Portal functionality is operational evidence; legal entitlement and liability remain controlled by the Act, Rules, notifications and binding decisions.