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Choose the right GST invoice format

Start with the transaction, then choose a layout. PDF is useful for viewing; Word and Excel let you adapt the sample. Check every field, formula and tax rate before issuing it.

Check print settings before using a compact layout. A4 is 210 × 297 mm, A5 is 148 × 210 mm and A6 is 105 × 148 mm. The A5/A6 and thermal samples above are layout styles placed on A4 PDF pages. Select the intended paper size, margins and scale, then print a test. A layout name does not change the PDF page size.

Downloads checked on 17 October 2026. These are sample documents, not a certification of tax treatment. Example dates, businesses and rates must be replaced. Excel samples may contain incomplete or no calculation formulas.

Compare Different GST Invoice Formats

Looking for the right GST invoice format for your business? Take a look at these layouts and see which one fits your products or services, your customer types, and your billing style. Some options are compact or set up for thermal printing, but they're shown here on A4 PDFs—so double-check your print settings before you hit print.

GST invoice formats compared
Format Layout Best for
A4 Model 1 A4 Everyday goods invoices with a detailed item table
A4 Model 4 · Goods A4 Goods with quantities and units
Service provider format A4 Services with SAC details
A4 Model 2 · B2B A4 Registered-business customers (GSTIN)
A4 Model 5 · B2C A4 Consumer billing
A5-style compact layout A5-style layout on an A4 landscape PDF Short product or service lists
A6-style compact layout Compact layout on an A4 PDF page Counters and small retail sales
80 mm / 3-inch thermal style Thermal-style sample on an A4 PDF page Receipt-style counter billing
58 mm / 2-inch thermal style Thermal-style sample on an A4 PDF page Short receipt-style bills


GST Invoice Rules: Common Questions Answered

Making a GST invoice doesn’t need to be tricky. Once you understand which invoice format fits your business and what tax details to include, things get a lot easier. Here’s a quick guide to the basics, including how to handle numbering, tax details, and e-invoicing.

Quick answer: Your GST tax invoice needs everything Rule 46 of the CGST Rules asks for—supplier details, a unique invoice number, the right HSN/SAC codes, taxable amount, tax rates, and the tax amounts. There’s no single template you have to use. Just pick a design that suits your goods or services and customer type, making sure all the required details are present. Updated 25 October 2026.

What is a GST invoice?

A GST invoice is a tax invoice that any registered business issues, as covered under Section 31 of the CGST Act. Rule 46 lists what you must include, so it’s a good idea to double-check its checklist every time you prepare one. Check the Rule 46 checklist before preparing your invoice.

Do you have to use a specific GST invoice layout?

No. The rules tell you which details must be covered but don’t tie you to a single format or design. You’re free to use any layout that works for your business, as long as it includes every field required for each transaction.

What are the rules for GST invoice numbers?

Every GST invoice should have a serial number that's unique for the whole financial year, and must be 16 characters or fewer. It can have letters or numbers, and you can use hyphens (-) or slashes (/). Need some inspiration? Check out our GST invoice number format guide for examples and extra tips, see our GST invoice number format guide.

Whose details must appear on a GST invoice?

Include your business name, address, and GSTIN. If your customer is registered, include their GSTIN or UIN as applicable. For an unregistered customer, the name and address, delivery address, and State name and code are required when the taxable value is ₹50,000 or more, or for a lower value when the customer requests these details, subject to the applicable rules.

Should you charge CGST and SGST or IGST?

Generally, when the supplier's location and place of supply are in the same State or Union Territory, CGST and SGST or UTGST apply. For an inter-State supply, IGST generally applies. Supplies to or by an SEZ are also treated as inter-State supplies. Read our GST tax treatment guide for more details.

How many HSN or SAC digits do you need?

GST guidance generally requires 4-digit HSN codes on B2B invoices for certain businesses with aggregate turnover up to ₹5 crore, and 6-digit codes for those above ₹5 crore, subject to applicable rules and exemptions. SAC codes are used to classify services. Check the latest notification and our HSN and e-invoice summary before issuing an invoice.

When should you issue a GST invoice?

The deadline depends on the type of supply. For goods, invoice timing depends on whether you need to move the goods or simply deliver them or make them available without any movement. For services, you're usually expected to issue an invoice within 30 days, but there are a few exceptions. If you want to get specific, check out Section 31 of the CGST Act to see which rules apply to your situation.

Should you issue a tax invoice or a bill of supply?

If you're registered under the composition scheme or supplying exempt goods or services, you generally issue a bill of supply instead of a tax invoice, subject to applicable provisions. The right document depends on your transaction. Explore the different types of GST documents to understand which one to use.

Is a downloaded GST invoice template the same as an e-invoice?

No. Creating or downloading an invoice in Word, Excel, or PDF doesn't make it a GST e-invoice. Where e-invoicing rules apply, invoice data must be reported to an Invoice Registration Portal (IRP) to obtain an Invoice Reference Number (IRN) and a signed QR code. The general turnover threshold is above ₹5 crore in any financial year from 2017–18 onwards, subject to notified exemptions. Check the latest requirements before relying on this threshold.



Which GST Invoice Format Suits Your Business?

Match your billing situation to a sample above. A layout is a starting point; the tax treatment depends on the actual supply.

shops and counter retail

Shops and Counter Retail

Short item lists for walk-in customers usually fit the A6-style, 80 mm or 58 mm thermal-style layouts, or the A4 Model 5 · B2C. These are layout styles placed on A4 PDF pages, so print a test first.

See the A6-style layout
shops and counter retail

Wholesalers, Distributors and Traders

Goods sold to registered businesses need quantity, unit, HSN and the customer GSTIN. The A4 Model 4 · Goods and A4 Model 2 · B2B samples are built around those fields.

See the B2B format
shops and counter retail

Freelancers, Consultants and Agencies

The service provider format has service descriptions and SAC details. Check the timing rule for services in the questions below before you set your billing dates.

See the service provider format
shops and counter retail

Everyday Goods Billing

The A4 Model 1 has a detailed item table for routine goods invoices, with room for the tax columns that apply to your supply.

See A4 Model 1
Using Google Sheets or Google Docs? You can upload a sample invoice from Excel or Word straight to Google Drive. Just a heads-up: when you convert files, things like formulas, fonts, and the way it prints can change. So double-check all your totals and run a test print before you send anything out.

A GST Invoice, Field by Field

Let's break down a typical GST invoice—from the supplier’s info right through to the total amount due. Here’s what you’ll usually see: both supplier and buyer details, invoice number, descriptions of the products or services, GST amounts, and the grand total. The GST rate itself changes depending on what’s being supplied.

Sample GST tax invoice showing supplier and buyer details, invoice number, product descriptions, GST amounts and total payable 1 2 3 4 5 6 7
Sample GST invoice illustrating supplier details, recipient information, product-wise taxation and invoice totals. The applicable GST rate depends on the goods or services supplied.

What the Numbered Areas Mean

  1. Supplier Details

    The supplier section contains the business name, address, contact details and GSTIN, where applicable. In this example, the supplier is Sleek Bill, located in Pune, Maharashtra.

  2. Invoice Number and Dates

    This section displays the invoice number IND/26-27/74, issue date of 24 October 2026, due date of 31 October 2026 and the amount due of ₹30,900.

  3. Bill To – Customer Details

    This section identifies the customer receiving the invoice. The example lists Akash Computers in Pune, Maharashtra, along with its contact details.

  4. Ship To – Delivery Address

    The shipping section specifies where the goods are delivered. Here, the delivery location is Pune, Maharashtra. The place of supply is shown separately where required.

  5. Product Details and Taxable Values

    The item table lays out each product—like a Dell laptop, monitors, a network switch, or a wireless keyboard—with details including HSN/SAC codes when needed, quantities, unit prices, taxable values, CGST, SGST, and line-item totals.

  6. Tax Summary and Grand Total

    The summary section pulls it all together, showing a total taxable value of ₹26,400, tax of ₹4,500, and a final invoice value of ₹30,900. Make sure the item-level tax amounts and GST rates match up with the summary before you finalize anything.

  7. Terms, Conditions and Authorisation

    The bottom section may contain payment terms, warranty details, a signature or authorisation. Reverse-charge details and e-invoice particulars, including IRN and QR code where applicable, should also be provided as required.

For statutory invoice requirements, refer to CBIC GST Invoice Rules and CGST Rule 46.

Important: This is an illustrative invoice. Verify the actual GST rates, HSN/SAC classifications, mandatory particulars and tax treatment for the transaction.

Check which fields apply to your transaction

Choose a layout for readability; choose the document and tax treatment under the applicable rules.

B2B and B2C details

A B2B recipient has a GSTIN/UIN where registered. For an unregistered recipient, record name, address, delivery address and State/code at taxable value ₹50,000 or more; below that, record them when requested. Specified online service supplies have additional State-detail rules.

Goods, services and codes

Goods need quantity and unit details. Use the relevant HSN/SAC classification for the supply. Applicable code-digit requirements and exceptions depend on notifications; do not copy a sample code or rate without checking. See the HSN digit summary .

E-invoice and signature checks

A Word, Excel or PDF file alone does not generate an IRN. Check e-invoice applicability and notified exemptions. Electronic-invoice signature exceptions and special QR requirements must be considered separately. See the e-invoice limit summary .

Tax invoice or bill of supply?

If you’re a composition taxpayer, or you’re dealing with exempt supplies, you’ll probably use a bill of supply instead of a normal tax invoice. If you have both taxable and exempt supplies on the same invoice, check the documentation rules for how to handle mixed transactions.

Learn about a bill of supply →

Sources: Rule 46, including its provisos · CBIC bill-of-supply guidance · IRP applicability guidance .

GST invoice mandatory fields: Rule 46 checklist

Rule 46 of the CGST Rules sets out what a tax invoice must contain. Use this plain-language checklist with the annotated sample above.

Particulars on a GST tax invoice
Particular What to enter When it applies
Supplier details Name, address and GSTIN of the supplier Every tax invoice
Invoice number Consecutive serial number, unique for the financial year, up to 16 characters Every tax invoice
Date of issue The invoice date Every tax invoice
Registered recipient Name, address and GSTIN/UIN Recipient is registered
Unregistered recipient Name, address, delivery address, State name and State code Taxable value ₹50,000 or more; below that, when the recipient asks
HSN or SAC code Classification code of the goods or services, with the digits required for your turnover See the HSN summary below
Description Description of the goods or services Every tax invoice
Quantity and unit Quantity and unit of measure Goods
Values Total value of the supply and the taxable value after discount or abatement Every tax invoice
Tax rate and amount Rate and amount of CGST, SGST/UTGST, IGST and cess, as applicable Every tax invoice
Place of supply Place of supply with the State name Inter-State supply
Delivery address Address of delivery When it differs from the place of supply
Reverse charge Whether tax is payable on reverse charge State it on the invoice
Signature Signature or digital signature of the supplier or an authorised representative Subject to the notified exceptions
QR code and IRN, or declaration A QR code with the Invoice Reference Number where the invoice is issued as an e-invoice; otherwise the declaration the rule requires Taxpayers above the notified e-invoice turnover

Worked example: ₹10,000 sale at an illustrative 18% rate

Same State (CGST + SGST)

CGST 9% = ₹900 and SGST 9% = ₹900. Taxable value ₹10,000 plus ₹1,800 tax gives an invoice total of ₹11,800.

Different State (IGST)

IGST 18% = ₹1,800. Taxable value ₹10,000 plus ₹1,800 tax gives the same invoice total of ₹11,800.

The 18% rate is only an illustration. Use the rate that applies to your goods or services, and confirm the place of supply before choosing CGST/SGST or IGST.

This summarises Rule 46 in plain language; the rule’s provisos and notified exceptions control. Some industries follow special invoice provisions under Rule 54. Read the rule text for your supply: Rule 46, including its provisos . Summary reviewed on 25 October 2026.

What’s an Invoice Number Under GST?

An invoice number is a unique code assigned to every invoice your business issues. Think of it as a fingerprint for each sale. GST rules require tax invoices to carry a unique serial number, which helps you track sales, maintain tax records, manage customer accounts, verify transactions during audits, and handle e-invoicing where applicable.

Businesses often focus on GST rates and return deadlines but overlook invoice numbering. An inconsistent numbering system can make recordkeeping and reconciliation more difficult. Getting it right from the beginning helps keep your invoices organised and your GST records easier to manage.

GST Invoice Numbering Rules, in Plain English

The basic idea is simple: invoice numbers must follow a consecutive sequence, remain unique within the financial year, and contain no more than 16 characters. You can use letters, numbers, hyphens (-), slashes (/), or a combination of these.

Rule 1: Make Invoice Numbers Unique

Every invoice in a financial year must have a distinct serial number within its series. Never reuse a number for another invoice in the same series.

Correct:

INV001, INV002, INV003

Incorrect:

INV001, INV002, INV001

Duplicate numbers can make it harder to match invoices, reconcile transactions, and maintain accurate GST records.

Rule 2: Stick to 16 Characters or Less

The invoice serial number must not exceed 16 characters. Choose a format that is easy to read and leaves enough room for your numbering sequence.

Examples that fit:

INV-2026-001 FY26/INV/1001

Avoid lengthy numbers that go beyond the prescribed character limit.

Rule 3: Keep Your Numbering Sequential

Follow a clear sequence, such as INV001, INV002, INV003, and INV004. If a number is skipped or an invoice is cancelled, keep the relevant records and follow the applicable requirements rather than reusing the number casually.

A well-maintained sequence makes it easier to review your records and explain any gaps during an audit.

Rule 4: You Can Use Separate Invoice Series

If your business operates from multiple branches or locations, you can use separate invoice series to help identify where each invoice was issued. Each series must still follow the applicable GST numbering rules.

For example:

Mumbai: MUM001 Delhi: DEL001 Pune: PUN001

This approach makes it easier to organise invoices and track sales by branch.

Rule 5: Reset Numbering Each Financial Year If You Want

Many businesses prefer to start a fresh numbering sequence at the beginning of a new financial year. This makes invoices easier to organise by year.

Example:

FY25-001, FY25-002, FY25-003 FY26-001, FY26-002, FY26-003

You can use a financial-year prefix as part of your numbering system, provided the serial numbers remain consecutive, unique within the financial year, and within the 16-character limit.

Rule 6: Keep Invoice Records Properly Documented

Keep a clear record of every invoice you issue, including its number, date, customer details, and transaction value. If an invoice is cancelled or a numbering gap occurs, maintain the relevant records and an explanation wherever required.

Good recordkeeping makes it easier to trace transactions, reconcile GST returns, and provide supporting documents during an audit.

In short: Keep your invoice numbering clear, consistent, and properly documented. A well-organised numbering system helps you track transactions and maintain reliable GST records.

HSN/SAC digits and the e-invoice limit at a glance

Two checks that decide how your invoice must look. Confirm both against the latest notification before you rely on them.

HSN/SAC digits on a tax invoice
Aggregate annual turnover Digits to show
Up to ₹5 crore 4 digits on B2B invoices
Above ₹5 crore 6 digits
E-invoicing at a glance
Question Answer
Who must issue e-invoices? Registered businesses whose aggregate turnover exceeded ₹5 crore in any financial year from 2017-18 onwards, subject to notified exemptions.
Has the limit changed? The ₹5 crore threshold has applied since 1 August 2023. Guidance published up to June 2026 shows no change.
How is an e-invoice created? Invoice data is reported to the Invoice Registration Portal (IRP), which returns the IRN and a signed QR code.
Is a template an e-invoice? No. A Word, Excel or PDF file does not generate an IRN.

Summarised from published GST guidance on 25 October 2026. Notifications change, so check the CBIC invoice rules and the IRP applicability guidance before issuing. Need e-invoicing? See our e-invoice software and the e-invoice tutorial .

Types of GST invoice documents

A tax invoice is not the only document you may need. Pick the one that matches the supply.

Tax invoice

Issued by a registered person for taxable supplies, with the particulars listed in Rule 46.

Invoice-cum-bill of supply

Where a registered person supplies both taxable and exempt goods or services to an unregistered person, Rule 46A allows a single invoice-cum-bill of supply. It must carry the particulars required by Rule 46 or 54, and Rule 49.

Consolidated invoice for small sales

For supplies under ₹200 to an unregistered recipient who does not ask for an invoice, a registered person may issue a consolidated invoice at the end of the day instead of one per sale. Check the Rule 46 provisos.

Revised tax invoice

A registered person whose registration takes effect from an earlier date may issue revised tax invoices for supplies made before the certificate was issued, within the period allowed by Rule 53.

Debit note and credit note

To change the value or tax on an invoice you have already issued, use a debit note for an increase or a credit note for a decrease.

See the credit note format →

Reverse-charge supplies

State on the invoice whether tax is payable on reverse charge. Reverse-charge supplies also have separate invoice and payment-voucher requirements; check section 31 and Rule 52 for your case.

Sources: Rule 46, including its provisos · CBIC invoice rules .

Check which fields apply to your transaction

Choose a layout for readability; choose the document and tax treatment under the applicable rules.

B2B and B2C details

A B2B recipient has a GSTIN/UIN where registered. For an unregistered recipient, record name, address, delivery address and State/code at taxable value ₹50,000 or more; below that, record them when requested. Specified online service supplies have additional State-detail rules.

Goods, services and codes

Goods need quantity and unit details. Use the relevant HSN/SAC classification for the supply. Applicable code-digit requirements and exceptions depend on notifications; do not copy a sample code or rate without checking.

E-invoice and signature checks

A Word, Excel or PDF file alone does not generate an IRN. Check e-invoice applicability and notified exemptions. Electronic-invoice signature exceptions and special QR requirements must be considered separately.

Tax invoice or bill of supply?

Composition taxpayers and exempt supplies generally use a bill of supply rather than charging GST through an ordinary tax invoice. Check the document rules for mixed taxable and exempt supplies.

Learn about a bill of supply →

Sources: Rule 46, including its provisos · CBIC bill-of-supply guidance · IRP applicability guidance .

CGST, SGST or IGST: select the right treatment

The supplier’s location and the legally determined place of supply matter. A customer’s “Ship To” address alone is not a complete test.

Ordinary intra-State supply

Where supplier location and place of supply are in the same State/UT, CGST plus SGST/UTGST generally applies, subject to statutory exclusions.

Inter-State supply

Different supplier-location and place-of-supply States/UTs generally mean IGST. Determine place of supply under the relevant goods or services provisions, including bill-to/ship-to rules.

SEZ supplies

Supplies to or by an SEZ unit/developer are treated as inter-State even within the same State. Zero-rating for supplies to an SEZ is subject to authorised-operation and other conditions.

Exports and deemed exports

Exports require the applicable statutory conditions and invoice endorsement; an overseas address does not automatically make every supply an export. Deemed exports are notified goods supplies that do not leave India, not simply Indian billing with overseas shipping.

Sources: IGST Act, sections 7–13 · CBIC SEZ clarification · CGST Act, section 147 . More on SEZ supplies · Export invoice guide .

Additional PDF examples

Deemed-export sample: under review. The former download shows an overseas Ship To address, so it should not be used as guidance for deemed exports. Its link is withheld pending a corrected sample. Other example files retain historical sample data and need transaction-specific review.

Frequently asked questions

Which GST invoice format should I choose?

Choose goods or services first, then registered-business (B2B) or consumer (B2C) details. Finally choose a readable A4, compact or thermal-style layout. A layout does not decide your tax rate.

Is there one compulsory visual GST invoice format?

The rules prescribe particulars and conditions rather than requiring one universal visual layout. A template must still include the fields applicable to your supply.

Should I use PDF, Word or Excel?

Use PDF to view a finished sample. Use Word to edit the document layout, or Excel to work with cells and calculations. Check formulas and totals; the supplied workbooks are not guaranteed automatic tax calculators.

Are A5, A6 and thermal PDF samples ready for that paper size?

Not directly. Those samples are placed on A4 PDF pages, including an A4 landscape page for the A5-style sample. Configure page size and scaling and print a test before issuing invoices.

When should a GST invoice be issued?

For goods, section 31 generally links issue to removal where movement is involved, or delivery/making available otherwise. Services generally have a 30-day period, with specified 45-day and other exceptions. Check the rule for your supply.

Is a downloaded GST invoice an e-invoice?

No. When e-invoicing applies, prescribed invoice data must be reported to an IRP to obtain the IRN and signed QR code. A downloaded template or payment QR code is not a substitute.

Timing: CGST Act, section 31 and invoice timing rules . E-invoice process: official Invoice Registration Portal .

Sample document — review its fields and tax treatment before use.

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GST Invoice Format