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In India, the document you issue under GST is determined by the tax treatment of the supply and your registration status—not by what the customer prefers to call it. A registered supplier generally issues a tax invoice for a taxable supply. A supplier making an exempt supply, or a registered person paying tax under the composition scheme, generally issues a bill of supply instead. A tax invoice shows GST charged; a bill of supply records the transaction without charging GST on that document.
The Central Goods and Services Tax Act, 2017 (CGST Act), the CGST Rules and applicable notifications govern the details, timing and exceptions. Inter-State supplies, exports, reverse-charge transactions, continuous supplies, e-invoicing and particular supplier classes can add requirements, so use this guide as a compliance framework and check the current rule text for your exact transaction.
How do I decide between a tax invoice and a bill of supply?
Start with two questions: Is the supply taxable? and What GST scheme applies to the supplier? A registered supplier making a taxable supply ordinarily issues a tax invoice. A registered supplier making an exempt supply ordinarily issues a bill of supply. A person registered under the composition scheme also generally issues a bill of supply because that scheme does not use the normal tax-charging invoice route.
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- Taxable supply by a regular registered supplier: tax invoice, showing the applicable GST rate and amount.
- Exempt supply: bill of supply, because GST is not charged on that document.
- Supply by a composition taxpayer: bill of supply, subject to the composition rules and any applicable exceptions.
- Limited statutory exceptions: section 31 and the rules can remove or modify the normal document requirement in specified circumstances.
Keep the classification, supporting records and document type consistent. If the transaction is inter-State, an export, under reverse charge, part of a continuous supply or covered by a notified e-invoice process, check those additional rules before issuing the document.
What is the difference between a tax invoice and a bill of supply?
The central difference is whether GST is being charged on the document. A tax invoice quantifies taxable value and tax. A bill of supply identifies the supply and its value but does not show a GST rate or GST amount as tax charged.
| Decision point | Tax invoice | Bill of supply |
|---|---|---|
| Typical use | Taxable supply by a registered supplier who is not using the composition route | Exempt supply or supply by a composition taxpayer, subject to statutory rules |
| GST shown | Applicable tax rate and tax amount are stated | No tax rate or tax amount is shown as tax charged on the document |
| Numbering | Consecutive serial number unique for the financial year | Consecutive serial number unique for the financial year |
| Party details | Supplier details and recipient details where prescribed | Supplier details and recipient details where prescribed |
| Supply details | Description; quantity and unit code for goods; value; taxable value after discounts or abatements; HSN or service accounting code; tax particulars and other prescribed fields | HSN or accounting code, description, value after discount or abatement and other prescribed fields |
| Recipient’s credit review | The ordinary supplier document used to support input tax credit, if all statutory conditions are met | Not the ordinary tax-charging document for credit on a taxable purchase |
The table describes the general distinction. The CGST Act, CGST Rules, notifications and any applicable sector-specific provisions control a particular transaction.
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What information must a GST tax invoice contain?
Rule 46 of the CGST Rules sets out the principal particulars. The exact fields can vary with the transaction, recipient and any notified process, so do not treat a generic template as complete for every supply.
Supplier and invoice identification
- Legal name, address and GSTIN of the supplier.
- A consecutive invoice serial number that is unique for the financial year.
- Date of issue.
Your numbering system should prevent duplicate numbers and preserve a clear audit trail. If you operate several series, document how each series remains consecutive and unique within the required financial-year framework.
Recipient information
- Name, address and GSTIN or UIN of a registered recipient.
- For specified supplies to an unregistered recipient at or above the applicable prescribed threshold, the recipient and delivery particulars required by the rules.
- Delivery address where the rules require it or where it differs from the recipient’s registered or billing address.
Capture the recipient’s registration status before invoicing. A wrong GSTIN can send tax credit to the wrong registration and create reconciliation problems even when the tax calculation is correct.
What was supplied
- HSN for goods or the Accounting Code for services, as applicable.
- Description of the goods or services.
- For goods, quantity and the applicable unit or Unique Quantity Code.
- Value of the supply and taxable value after applicable discounts or abatements.
Descriptions should be specific enough to connect the invoice to the purchase order, delivery record or service engagement. For goods, retain quantity and unit information that can be matched to inventory and transport records.
Tax and statutory indicators
- Applicable tax rate and tax amount.
- Place of supply for an Inter-State supply.
- Delivery address where relevant.
- An indication when the transaction is subject to reverse charge.
- Supplier signature or digital signature, subject to rule-based exceptions.
An Inter-State invoice needs the place-of-supply information required by the rules so that the IGST treatment can be checked. Do not assume that a local-looking billing address alone establishes the place of supply.
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Exports and notified processes
Export invoices require the relevant export endorsement and destination-related particulars under Rule 46. Export supplies are zero-rated, not the same thing as ordinary exempt supplies; use the export invoicing route and supporting documents applicable to the transaction.
Taxpayers covered by an e-invoice requirement or another notified class may have additional generation, authentication, reference-number or reporting steps. A paper or accounting-system invoice that omits a required notified process may not satisfy the complete compliance requirement.
What information must a bill of supply contain?
Rule 49 requires a bill of supply to identify the supplier, recipient where applicable and the underlying supply, while avoiding a tax charge on the document.
Core bill particulars
- Supplier name, address and GSTIN.
- A consecutive serial number unique for the financial year.
- Date of issue.
- Recipient name, address and registration identifier where applicable under the rules.
- HSN or Accounting Code, as applicable.
- Description of the goods or services.
- Value after discount or abatement.
- Supplier signature or digital signature, subject to rule-based exceptions.
Unlike a tax invoice, the bill of supply does not contain a GST tax rate or tax amount because tax is not being charged on that document. Do not add a separate GST line merely to make the form look like a tax invoice; doing so can contradict the exempt or composition treatment.
Some bill-of-supply situations borrow relevant provisos or exceptions from the tax-invoice rules. Check the current Rule 49 text and notifications for the particular goods, services, recipient and scheme before finalizing a template.
When must I issue a GST invoice or bill of supply?
Invoice timing differs for goods and services, and special categories can change the general deadline. Issue the document at the legally required point, not simply when your accounting team happens to close the month.
Taxable goods
For a taxable supply of goods involving movement, section 31 generally requires the invoice before or at the time of removal. Where the supply does not involve movement, the invoice is generally due before or at delivery or before the goods are made available to the recipient.
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Taxable services
For taxable services, the prescribed period generally runs from the date of supply. The CBIC rules page describes a general period of 30 days and a 45-day period for specified insurance, banking and financial suppliers, with exceptions and special arrangements.
Confirm whether your service is continuous, supplied by a notified financial supplier or covered by another special rule. The date of completion, payment and account entry can have different significance depending on the applicable provision.
Special timing cases
Continuous supplies, reverse-charge transactions, exports, goods supplied on approval and notified categories can have their own timing rules. Do not force these transactions into the ordinary goods or ordinary services timetable without checking the relevant section, rule and notification.
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Sometimes, but the ₹200 threshold is a conditional exception, not a blanket exemption from invoicing. A registered supplier may omit an individual tax invoice for a covered supply below ₹200 only when the prescribed conditions are satisfied.
- The recipient is unregistered.
- The recipient does not require an invoice.
- The supplier issues a consolidated tax invoice at the end of the day for the supplies covered by the exception.
If the unregistered customer asks for an invoice, issue one rather than relying on the threshold. Keep the day-end consolidation supported by point-of-sale, delivery or accounting records so that each covered supply can be traced.
The figure is a statutory section 31 threshold, not a general small-business allowance. Verify the current conditions before applying it, especially where another rule or notification changes the normal process.
Does a bill of supply allow the buyer to claim input tax credit?
A bill of supply is not the ordinary tax-charging supplier invoice used to substantiate input tax credit for a taxable purchase. CBIC’s input-tax-credit rules identify an invoice issued under section 31 and a debit note among the documentary bases for credit, together with other specified documents and conditions.
Credit is never automatic merely because a document exists. The recipient must satisfy the applicable statutory requirements, including conditions concerning the nature of the supply and the recipient’s records. If a supplier issues a bill of supply for an exempt transaction, there is normally no GST amount on that document for the recipient to claim as input tax credit.
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If a customer says a bill of supply is preventing credit, first confirm whether the underlying supply was actually taxable and whether the supplier’s status was recorded correctly. Do not replace a legally correct bill of supply with a tax invoice simply to create a credit amount.
How should I handle common GST invoicing situations?
Exempt supply by a regular registered supplier
Use a bill of supply and record the exemption basis in your internal documentation. The document should still identify the parties, serial number, date, description, code and value required by Rule 49.
Composition taxpayer
Use a bill of supply for supplies made under the composition route rather than a normal tax invoice. Keep the composition status and the transaction classification consistent across your books, customer communication and return records.
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Inter-State taxable supply
Use a tax invoice when the supply is taxable and include the place of supply required for an Inter-State transaction. The applicable integrated-tax treatment must agree with the place-of-supply analysis.
Export of goods or services
Exports are zero-rated, not ordinary exempt supplies. Use the export invoice format and endorsement required by Rule 46 and retain destination-related particulars and supporting export records.
Reverse charge
Mark the reverse-charge position where required and check whether the recipient or supplier has the invoicing responsibility under the applicable rule. Reverse charge can alter both who documents the transaction and when the document is issued.
Continuous supply
Identify the contractual milestones, payment dates and recurring billing points. Continuous-supply rules can set a different invoice trigger from a one-time delivery or service completion.
Goods supplied on approval
Approval arrangements have specific timing concerns because goods may be delivered before the customer accepts them. Check the applicable provision rather than treating the approval dispatch as an ordinary completed sale.
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What is a reliable process for issuing the right document?
Use this sequence for each transaction before releasing the document to the customer.
- Confirm the supplier’s status. Check that the GST registration is active and determine whether the supplier is a regular taxpayer or composition taxpayer for the transaction date.
- Classify the supply. Decide whether it is taxable, exempt, zero-rated export, reverse charge, continuous, approval-based or another notified category.
- Identify the recipient. Capture the recipient’s legal name, address, GSTIN or UIN where applicable, and whether the recipient is registered or unregistered.
- Select the document. Use a tax invoice for the normal taxable route; use a bill of supply for an exempt supply or composition supply when that route applies.
- Apply the timing rule. For goods, align issue with removal, delivery or availability as required. For services, check the 30-day general rule, the 45-day specified-financial-supplier rule and any exception.
- Populate mandatory fields. Add the serial number, date, party details, HSN or accounting code, description, value, quantity and unit for goods, tax fields where applicable, place of supply, reverse-charge indication and signature requirements.
- Check special processes. Confirm export wording, e-invoice applicability, digital authentication, transport documentation and any notification applicable to the supplier or transaction.
- Reconcile before posting. Match the document to the order, delivery evidence, service completion record, payment terms and accounting entry. Correct errors through the permitted document process rather than silently editing an issued serial record.
- Preserve the audit trail. Retain the issued document, supporting calculations, exemption or export evidence and any system reference needed to reproduce the transaction.
What mistakes cause the most GST invoice problems?
- Using a tax invoice for an exempt supply: this can suggest tax was charged when it was not legally due. Use the bill-of-supply route and retain the exemption basis.
- Adding GST to a bill of supply: the document should not show a tax rate or tax amount as tax charged.
- Treating composition supplies like regular taxable supplies: composition taxpayers generally use bills of supply and must follow the composition restrictions.
- Issuing late: dispatching goods before the required invoice point or missing the applicable service deadline can create compliance exposure.
- Ignoring recipient status: missing a GSTIN, UIN or prescribed unregistered-recipient detail can impair reconciliation and reporting.
- Leaving out place of supply: an Inter-State invoice needs the required place-of-supply information.
- Calling exports exempt: zero-rated exports have their own endorsements and particulars; do not use an ordinary exempt-supply template.
- Assuming ₹200 means no record is needed: the exception requires an unregistered recipient who does not request an invoice and a day-end consolidated invoice.
- Promising input tax credit from any document: credit depends on the statutory document and all other conditions, not merely on an invoice number.
- Relying on an old template: rules, notifications and e-invoice applicability can change. Review templates when the law or your supplier category changes.
What should a business check before finalizing a GST invoice template?
Build separate templates for the tax-invoice and bill-of-supply routes so that tax fields cannot be accidentally carried into an exempt or composition document. Add configurable fields for GSTIN or UIN, HSN or Accounting Code, place of supply, reverse charge, delivery address, export endorsement and e-invoice references where applicable.
Have the template owner document which fields are mandatory, conditional or not used for each transaction type. Test numbering across financial-year rollover, cancellation and correction workflows. A template is only a presentation layer; the legal classification, timing, records and applicable notifications remain the controlling requirements.
Where can I verify a taxpayer-specific requirement?
Check the current consolidated CGST Act and CGST Rules, CBIC instructions and FAQs, and notifications applicable to your sector, turnover, transaction type and e-invoice status. Inter-State and State or Union Territory GST provisions may also matter. For a high-risk or unusual transaction, obtain advice from a qualified tax professional before issuing the document, particularly for exports, reverse charge, continuous supplies, approval consignments and mixed taxable-exempt arrangements.
Frequently Asked Questions
Can a customer ask me to issue a tax invoice for an exempt supply?
The customer’s request does not change the legal treatment of the supply. If the supply is exempt, the supplier should use a bill of supply and should not show GST as tax charged; reclassify only if the underlying transaction was incorrectly treated as exempt.
Is a bill of supply the same as a payment receipt?
No. A bill of supply is a GST document identifying a supply and its value without charging GST. A receipt records payment, so a business may need both documents when its payment and invoicing records serve different purposes.
What happens to invoice numbering at the start of a new financial year?
The invoice serial number must be consecutive and unique for the financial year. Set your accounting system to document the new year’s numbering policy, prevent duplicate series and preserve access to the prior year’s records for audit and reconciliation.
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Do I need separate templates for goods and services?
Separate or conditionally controlled templates are safer because goods require quantity and unit information, while services use an Accounting Code and follow different timing rules. In either case, retain the common supplier, recipient, serial-number, date, value and tax fields required for the transaction.
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