As per the draft GST Rules issued (later approved by GST Council), an invoice has to be issued by supplier within 30 days of from the date when each event specified in the contract, which requires the recipient to make any payment to the supplier of services, is completed.
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The invoice should contain following details (Click to Download Sample Invoice Format):
(a) name, address and GSTIN of the supplier;
(b) a consecutive serial number containing only alphabets and/or numerals, unique
for a financial year;
(c) date of its issue;
(d) name, address and GSTIN/ Unique ID Number, if registered, of the recipient;
(e) name and address of the recipient and the address of delivery, along with the
name of State and its code, if such recipient is unregistered and where the taxable
value of supply is fifty thousand rupees or more;
(f) HSN code of goods or Accounting Code of services;
(g) description of goods or services;
(h) quantity in case of goods and unit or Unique Quantity Code thereof;
(i) total value of goods or services;
(j) taxable value of goods or services taking into account discount or abatement, if
(k) rate of tax (CGST, SGST or IGST);
(l) amount of tax charged in respect of taxable goods or services (CGST, SGST or
(m) place of supply along with the name of State, in case of a supply in the course
of inter-State trade or commerce;
(n) place of delivery where the same is different from the place of supply;
(o) whether the tax is payable on reverse charge;
(p) the word “Revised Invoice” or “Supplementary Invoice”, as the case may be,
indicated prominently, where applicable along with the date and invoice number of the
original invoice; and
(q) signature or digital signature of the supplier or his authorized representative.
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Invoice has to be issued in triplicate in case of goods (each for recipient, transporter & supplier) and in duplicate (each for recipient & supplier) in case of services.
The serial number of invoices issued during a tax period shall be furnished electronically through the Common Portal in FORM GSTR-1.
GST also provides option to upload invoices electronically in FORM GST INV-1, and produce the same for verification by the proper officer as required in lieu of the tax invoice. The Invoice Reference Number shall be valid for a period of 30 days from the date of uploading.