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CGST Act Section 31: Tax invoice | Finin2min

Section 31 - Tax invoice

Chapter VII - Tax Invoice, Credit and Debit Notes
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Finin2min Summary - Section in 2 Minutes

Creates the complete invoice-timing architecture for goods, services, continuous supplies, RCM recipient invoices, revised invoices, small-value supplies and special documents. Goods invoice: before/at removal where movement occurs, otherwise before/at delivery or availability. Service invoice: before or after supply but within the prescribed period. Special documents include revised invoice, bill of supply, receipt/refund/payment voucher and recipient-issued RCM invoice. For section 9(3)/(4) supplies from an unregistered supplier, the recipient invoice must follow the prescribed period; rule 47A fixes 30 days from receipt from 1 November 2024. Continuous supply and sale-on-approval transactions have separate statutory timing.

Exact operative text

Paragraph-wise decode

Creates the complete invoice-timing architecture for goods, services, continuous supplies, RCM recipient invoices, revised invoices, small-value supplies and special documents. Goods invoice: before/at removal where movement occurs, otherwise before/at delivery or availability. Service invoice: before or after supply but within the prescribed period. Special documents include revised invoice, bill of supply, receipt/refund/payment voucher and recipient-issued RCM invoice. For section 9(3)/(4) supplies from an unregistered supplier, the recipient invoice must follow the prescribed period; rule 47A fixes 30 days from receipt from 1 November 2024. Continuous supply and sale-on-approval transactions have separate statutory timing.

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

Goods leave the supplier on 12 July and reach the customer on 15 July. The tax invoice must ordinarily exist by removal on 12 July, not on delivery.

Professional alert

Invoice timing drives tax period, interest, e- invoice validity, recipient ITC and penalty exposure. A portal document created late does not retrospectively cure the statutory breach.

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 31 regulate?
It regulates tax invoice. Read the exact text, conditions, exceptions and transaction date together.
Which subordinate law should be checked?
Rule 46, Rule 46A, Rule 47, Rule 47A, Rule 48, Rule 49, Rule 50, Rule 51, Rule 52, Rule 53, Rule 54, Rule 55. 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.