How to Create GST Invoice: Format, Rules and Free Template 2026

What Is a GST Invoice and Why Does It Matter?

A GST invoice is a legally required document that businesses registered under the Goods and Services Tax (GST) must issue to customers when supplying goods or services. It serves as proof of the transaction and is essential for claiming input tax credit (ITC)—a mechanism that allows businesses to deduct the GST they’ve paid on purchases from the GST they collect on sales.

As of April 2026, the GST regime in India is fully digitized, with the GST Network (GSTN) tracking every invoice in real time. This means incorrect or missing invoices can trigger notices from the CBIC and even lead to penalties. For newly registered businesses, mastering the GST invoice format is the first step toward compliance and smooth operations.

Who Needs to Issue a GST Invoice?

If your business is registered under GST, you must issue a GST invoice for every taxable supply of goods or services, with a few exceptions. This includes:

• Regular taxpayers under the GST composition scheme (though their invoices are simpler).
• E-commerce operators who facilitate sales through platforms like Amazon or Flipkart.
• Input service distributors (ISDs) who distribute ITC to branches.
• Businesses making inter-state supplies (even if exempt under GST).

Exemptions apply to small businesses with turnover below ₹40 lakh (₹20 lakh for special category states) who opt for the GST composition scheme. However, even these businesses must issue a bill of supply instead of a GST invoice.

GST Invoice Format: What Must Be Included in 2026?

The GST invoice format is standardized by the CBIC and includes 24 mandatory fields. Here’s a breakdown of what your invoice must contain:

For B2B invoices, you must also include:

• Reverse Charge Mechanism (RCM) details if applicable (e.g., "Tax under RCM").
• E-way Bill Number if the consignment value exceeds ₹50,000.
• QR Code for digital verification (mandatory for B2C invoices above ₹200).

HSN and SAC Codes: The Backbone of GST Invoices

The HSN (Harmonized System of Nomenclature) code classifies goods, while the SAC (Services Accounting Code) does the same for services. These codes determine the GST rate applicable to your product or service. As of April 2026, the CBIC has simplified HSN requirements:

• Businesses with turnover < ₹1.5 crore: No HSN/SAC required (only description needed).
• Turnover between ₹1.5 crore and ₹5 crore: 2-digit HSN/SAC.
• Turnover > ₹5 crore: 4-digit HSN/SAC.

For example, a laptop falls under HSN 8471, attracting a GST rate of 18%. A legal service falls under SAC 998211, taxed at 18% as well. Always double-check codes using the GST Portal to avoid mismatches.

GST Invoice Rules You Must Follow in 2026

The CBIC has laid out strict rules for GST invoices. Violating them can lead to penalties, audits, or even suspension of your GST registration. Here are the key rules to remember:

1. Timing of Invoice Issuance

You must issue an invoice at the earliest of the following dates:

• Date of supply of goods (when goods are delivered or made available).
• Date of completion of service (when the service is rendered).
• Date of receipt of payment (if payment is received before supply).
• Date of issue of receipt voucher (for advance payments).

For continuous services (e.g., maintenance contracts), invoices must be issued every month or quarter, depending on the contract terms.

2. Invoice Numbering Rules

Your invoice numbers must follow these guidelines:

• Must be unique and sequential within a financial year.
• Can include alphabets and hyphens (e.g., INV-2026-001).
• Must not exceed 16 characters.
• Must be printed consecutively (no skipping numbers).

For example, if your last invoice was INV-2026-005, the next must be INV-2026-006—not INV-2026-010.

3. Digital Signatures and QR Codes

As of April 2026, all B2B invoices must be digitally signed using a Digital Signature Certificate (DSC) or an e-Sign to ensure authenticity. Additionally:

• B2C invoices above ₹200 must include a QR code linking to the GST portal for verification.
• QR codes must contain the GSTIN of the supplier, invoice number, date, and total tax amount.

Businesses can generate QR codes for free using tools like the GST Self-Service Portal.

4. Handling Reverse Charge Mechanism (RCM)

The reverse charge mechanism (RCM) shifts the responsibility of paying GST from the supplier to the recipient. This applies in cases like:

• Purchase of goods from an unregistered supplier (if turnover > ₹5 lakh).
• Import of services from outside India.
• Certain notified services (e.g., legal or consulting services from unregistered providers).

For RCM invoices, you must mention:

• "Tax under RCM" clearly on the invoice.
• The applicable GST rate (e.g., 18% for services).
• The recipient’s GSTIN (if registered).

5. Special Cases: Exports, SEZs, and Deemed Exports

Invoices for special transactions require additional details:

For exports, you must also issue a shipping bill along with the invoice to claim a refund of input tax credit.

6. Credit Notes and Debit Notes

If you need to correct an invoice after issuance, you must issue a credit note (for refunds or discounts) or a debit note (for additional charges). These must include:

• Original invoice number and date.
• Reason for the note (e.g., "Goods returned," "Discount applied").
• Adjustment in taxable value and GST.

Credit notes must be issued by September 30 of the following financial year or the date of filing the annual return, whichever is earlier.

How to Create a GST Invoice: Step-by-Step Guide

Creating a GST invoice manually is error-prone, but following these steps will help you get it right:

Step 1: Gather Required Information

Before drafting your invoice, collect the following details:

• Your business name, address, and GSTIN.
• Customer’s name, address, and GSTIN (if registered).
• Description of goods/services, HSN/SAC codes, and quantities.
• Agreed prices, discounts, and taxes.
• Payment terms (e.g., "Net 15 days").

Step 2: Choose Your Invoice Creation Method

You have three options to create a GST invoice:

1. Manual Invoicing: Use a spreadsheet (Excel/Google Sheets) or word processor (Word). Best for very small businesses with low invoice volumes.
2. Accounting Software: Tools like Tally, Zoho Books, or QuickBooks automate GST calculations, numbering, and e-way bill generation. Ideal for growing businesses.
3. GST Portal: The GST Self-Service Portal allows you to generate invoices online, but it’s less user-friendly for bulk use.

Step 3: Design Your Invoice Layout

Your invoice should be clear, professional, and include all mandatory fields. Here’s a sample layout:

• Header: Your business name, address, GSTIN, and contact details.
• Invoice Details: Number, date, and place of supply.
• Customer Details: Name, address, and GSTIN (if applicable).
• Itemized Breakdown: Description, HSN/SAC, quantity, unit price, discount, taxable value, and GST rates (CGST/SGST/IGST).
• Total Amount: Grand total including GST.
• Payment Terms: Due date, bank details, and UPI/QR code for digital payments.
• Footer: "Tax Invoice" (for B2B) or "Bill of Supply" (for exempt supplies), and your digital signature/QR code.

Step 4: Calculate Taxes Accurately

GST rates vary by product/service. As of April 2026, the standard rates are:

Use the GST Rate Finder to confirm the correct rate for your product/service.

Step 5: Add Digital Signature and QR Code

For B2B invoices, affix a digital signature (DSC or e-Sign) to validate the document. For B2C invoices above ₹200, generate a QR code using the GST Portal or tools like QR Code Generator. The QR code should link to the GST portal and contain:

• Supplier’s GSTIN.
• Invoice number and date.
• Total tax amount.
• Supplier’s digital signature (if applicable).

Step 6: Save and Store Invoices Securely

GST laws require you to store invoices for at least 7 years. Store both digital and physical copies in a secure location, preferably backed up in the cloud. Use a consistent naming convention (e.g., "INV-2026-001-ABC Enterprises.pdf") for easy retrieval.

Free GST Invoice Template for Indian Businesses (2026)

To save you time, we’ve created a free, editable GST invoice template in Excel and Word formats. This template includes all mandatory fields and auto-calculates GST for you. Download it here:

• GST Invoice Template (Excel)
• GST Invoice Template (Word)

To use the template:

1. Enter your business details in the header section.
2. Fill in the customer’s GSTIN (if registered).
3. Add item details, including HSN/SAC codes and quantities.
4. The template will auto-calculate CGST, SGST, and IGST based on the GST rate you select.
5. Save the file with a unique invoice number (e.g., "INV-2026-001.pdf").

For advanced features like e-way bill integration, consider using accounting software like Tally or Zoho Books.

Common Mistakes to Avoid in GST Invoicing

Even experienced businesses make errors in GST invoicing. Here are the most common pitfalls and how to avoid them:

1. Incorrect GSTIN or HSN/SAC Codes

Mismatched GSTINs or wrong HSN/SAC codes can lead to:

• Rejection of ITC claims.
• Penalties for misclassification.
• Delays in e-way bill generation.

Solution: Always verify GSTINs using the GST Portal’s search tool and double-check HSN/SAC codes against the CBIC’s list.

2. Missing or Incorrect Tax Rates

Applying the wrong GST rate (e.g., charging 18% instead of 12%) can result in:

• Underpayment or overpayment of tax.
• Discrepancies in GSTR-1 filings.
• Interest and penalties for short payment.

Solution: Use the GST Rate Finder for every product/service. For services, refer to the SAC list.

3. Late or Missing Invoices

Issuing invoices after the due date (e.g., 30 days for services) can lead to:

• Disallowed ITC claims.
• Interest on delayed tax payments (18% per annum under CGST).
• Notices from the GST department.

Solution: Set up automated reminders in your accounting software or use the GST Portal’s e-Invoicing system to generate invoices on time.

4. Not Issuing Credit/Debit Notes for Adjustments

Failing to issue credit or debit notes for returns, discounts, or additional charges can cause:

• Mismatches in GSTR-1 and GSTR-2A.
• Rejection of ITC claims.
• Penalties for incorrect reporting.

Solution: Issue credit/debit notes within the stipulated time frame (by September 30 of the next financial year). Use your accounting software to track adjustments automatically.

5. Ignoring E-Way Bill Requirements

For consignments valued above ₹50,000, an e-way bill is mandatory. Not generating one can result in:

• Seizure of goods during transit.
• Penalties up to ₹10,000 or 100% of the tax value.
• Delays in delivery.

Solution: Generate e-way bills using the E-Way Bill Portal or accounting software like Tally. Ensure the invoice number and e-way bill number match.

GST Invoicing for E-Commerce and Digital Platforms

If you sell through e-commerce platforms like Amazon, Flipkart, or Meesho, your invoicing process has additional requirements:

1. Marketplace vs. Seller Invoicing

E-commerce operators (ECOs) can handle invoicing in two ways:

• Marketplace Invoicing: The platform issues the invoice to the customer, and you receive a consolidated invoice from the platform. This is common for small sellers.
• Seller Invoicing: You issue the invoice directly to the customer, and the platform collects payment. This is typical for larger sellers or brands.

If you opt for seller invoicing, you must:

• Include the platform’s GSTIN on the invoice.
• Mention "E-commerce Operator" and their GSTIN.
• Ensure the invoice complies with GST rules (e.g., HSN/SAC codes, tax rates).

2. TCS (Tax Collected at Source) Compliance

E-commerce platforms are required to collect Tax Collected at Source (TCS) at 1% on the gross value of sales (excluding GST). This amount is deposited with the government and reflected in your GSTR-8 form. As a seller, you must:

• Issue invoices to customers (if not handled by the platform).
• Report sales in your GSTR-1 form, including TCS details.
• Claim ITC on the TCS amount paid by the platform.

For example, if you sell a product for ₹10,000 (GST @ 18%), the platform will collect TCS of ₹100 (1% of ₹10,000) and deposit it with the government. You can claim this ₹100 as ITC in your GSTR-3B.

3. Handling Returns and Refunds

E-commerce platforms often handle returns and refunds. If a customer returns a product:

• The platform issues a credit note to the customer.
• You receive a notification to adjust your sales and tax liability in your GSTR-1.
• Ensure the credit note includes the original invoice number and reason for return (e.g., "Defective product").

For cash-on-delivery (COD) orders, platforms may deduct TCS only after confirming delivery, so keep track of pending TCS amounts.

GST Invoicing for Freelancers and Professionals

Freelancers, consultants, and professionals providing services must also issue GST invoices. Here’s what you need to know:

1. When to Issue an Invoice

As a freelancer, you must issue an invoice:

• When the service is completed (for one-time projects).
• Monthly or quarterly (for retainer-based services).
• Upon receipt of payment (if payment is received before service completion).

2. Invoice Format for Services

Your invoice should include:

• Your name, address, and GSTIN.
• Customer’s name and GSTIN (if registered).
• Description of services (e.g., "Content Writing for Blog").
• SAC code (e.g., 998211 for legal services).
• Total amount (including GST).
• Payment terms (e.g., "Due within 7 days").

For example, if you charge ₹50,000 for a project with 18% GST, your invoice would look like this:

3. Handling Inter-State Services

If you provide services to a customer in another state, you must charge Integrated GST (IGST) instead of CGST and SGST. For example:

• You’re based in Delhi (State Code: 07).
• You provide consulting services to a client in Mumbai (State Code: 27).
• You charge IGST @ 18% (since it’s an inter-state supply).

4. Simplified Invoicing for Small Freelancers

If your annual turnover is below ₹1.5 crore, you can issue a simplified tax invoice with fewer details. This includes:

• Your name and GSTIN.
• Customer’s name (GSTIN optional).
• Description of services.
• Total amount (including GST).

However, you cannot claim ITC on simplified invoices, so it’s best to issue full GST invoices whenever possible.

GST Invoicing for Manufacturers and Traders

Manufacturers and traders dealing in physical goods have additional invoicing requirements, especially for e-way bills and stock transfers:

1. E-Way Bill Requirements

For goods valued above ₹50,000, you must generate an e-way bill before transporting them. The e-way bill includes:

• Invoice number and date.
• Consignor and consignee details (GSTIN, address).
• Item details (HSN code, quantity, value).
• Vehicle number (for road transport).
• Transporter details (if applicable).

You can generate e-way bills using the E-Way Bill Portal or accounting software like Tally. The e-way bill is valid for:

• 1 day for distances up to 100 km.
• 3 days for distances between 100-300 km.
• 15 days for distances above 300 km.

2. Stock Transfers and Branch Transfers

When transferring goods between branches or warehouses in different states, you must issue a delivery challan instead of a GST invoice. The challan should include:

• Challan number and date.
• Sender and receiver details (GSTIN, address).
• Item details (HSN code, quantity, value).
• Reason for transfer (e.g., "Branch Transfer").

You do not charge GST on stock transfers, but you must report them in your GSTR-1 form under "Stock Transfer Outwards."

3. Handling Returns and Defective Goods

If a customer returns goods or you receive defective stock, issue a credit note to adjust your tax liability. The credit note should include:

• Original invoice number and date.
• Reason for return (e.g., "Damaged during transit").
• Quantity and value of returned goods.
• Adjustment in taxable value and GST.

Ensure the credit note is issued within the stipulated time frame (by September 30 of the next financial year).

4. Job Work Invoicing

If you send goods to a job worker for processing, you must issue a job work challan instead of a GST invoice. The challan should include:

• Challan number and date.
• Sender and job worker details (GSTIN, address).
• Item details (HSN code, quantity, value).
• Due date for return of processed goods.

If the job worker is unregistered, you must reverse the ITC claimed on the input goods sent for job work.

GST Invoicing for Restaurants and Hospitality

Restaurants and hospitality businesses have unique invoicing requirements due to the composition scheme and restaurant services GST rate:

1. Composition Scheme vs. Regular GST

Restaurants with turnover below ₹1.5 crore can opt for the GST composition scheme, which simplifies invoicing:

• You charge a flat GST rate of 5% (1% CGST + 1% SGST for intra-state, 2.5% IGST for inter-state).
• You cannot issue a GST invoice with tax breakup—only a bill of supply.
• You cannot claim ITC on purchases.

If your turnover exceeds ₹1.5 crore, you must opt out of the composition scheme and issue regular GST invoices with 5% GST (for non-alcoholic items) or 18% GST (for alcoholic beverages).

2. Invoice Format for Restaurants

A restaurant GST invoice should include:

• Restaurant name, address, and GSTIN.
• Customer name (GSTIN optional for B2C).
• Itemized bill with HSN code (e.g., 9963 for restaurant services).
• Total amount (including GST).
• Payment mode (cash, card, UPI).

For example, a bill for a meal costing ₹1,000 with 5% GST would look like this:

3. Handling Takeaway and Home Delivery

For takeaway orders, issue a GST invoice at the time of delivery. For home delivery, the invoice can be issued at the time of order confirmation if payment is received upfront. Ensure the delivery address and customer details are accurate to avoid e-way bill issues.

4. Special Cases: Banquet Halls and Catering

Banquet halls and catering services must issue GST invoices with additional details:

• Event Details: Date, venue, and type of event (e.g., wedding, conference).
• Package Details: Breakup of food, beverages, and services.
• GST Rate: 18% for catering services (HSN 9963).

If alcohol is served, charge 18% GST on alcoholic beverages separately from food charges.

How to Verify GST Invoices for Compliance

Before issuing an invoice, verify its compliance to avoid penalties. Here’s how:

1. Use the GST Portal’s Invoice Verification Tool

The GST Self-Service Portal allows you to validate invoices by uploading them. The tool checks for:

• Mandatory fields (e.g., GSTIN, HSN/SAC codes).
• Correct tax rates.
• Digital signature/QR code (for B2B invoices).

2. Cross-Check with GSTR-2A

GSTR-2A is an auto-generated form that lists all invoices issued by your suppliers. Compare your purchase invoices with GSTR-2A to ensure:

• Suppliers have correctly reported your GSTIN.
• Invoices match the details in GSTR-2A.
• No discrepancies exist (e.g., missing invoices, incorrect amounts).

If you find mismatches, request your supplier to correct the invoice or issue a credit note.

3. Validate GSTINs Using the GST Portal

Always verify the GSTIN of your customers and suppliers using the GST Portal’s search tool. This ensures:

• The GSTIN is active and valid.
• The business name matches the GSTIN.
• The address is correct (to avoid e-way bill issues).

4. Check for E-Way Bill Compliance

For consignments above ₹50,000, ensure:

• An e-way bill is generated before transportation.
• The e-way bill number is mentioned on the invoice.
• The vehicle number and transporter details are accurate.

Use the E-Way Bill Portal to verify e-way bills by entering the e-way bill number.

GST Invoice Software and Tools for 2026

Managing GST invoices manually is time-consuming and error-prone. Here are the best software and tools to automate the process:

1. Accounting Software with GST Compliance

These tools automate GST calculations, invoice generation, and e-way bill creation:

• Tally Prime: Industry leader for GST compliance, with features like e-Invoicing, GSTR-1/3B filing, and multi-GSTIN support. Pricing starts at ₹7,200/year.
• Zoho Books: Cloud-based accounting with GST invoicing, auto-tax calculations, and integration with payment gateways. Plans start at ₹499/month.
• QuickBooks: User-friendly for small businesses, with GST-compliant invoices and bank reconciliation. Plans start at ₹1,680/month.
• Busy Accounting Software: Designed for Indian SMEs, with GST invoicing and inventory management. Pricing starts at ₹12,000/year.

2. Free GST Invoice Generators

If you’re on a tight budget, these free tools can help:

• Invoice Generator: Simple tool for creating GST-compliant invoices. Limited to 5 invoices/month in the free plan.
• Canva Invoice Templates: Free, customizable templates for GST invoices. No automation features.
• Google Sheets Template: Use our free GST invoice template (linked earlier) and customize it in Google Sheets.

3. E-Way Bill and E-Invoicing Tools

For businesses required to generate e-way bills or e-invoices:

• E-Way Bill Portal: Official government portal for generating e-way bills. Free to use.
• E-Invoice Portal: For businesses with turnover > ₹5 crore, this portal generates e-invoices with QR codes. Free to use.
• E-Way Bill Niryat: Third-party tool for bulk e-way bill generation. Paid plans start at ₹500/month.

4. Mobile Apps for GST Invoicing

For on-the-go invoicing, these apps are handy:

• Zoho Books App: Available on Android and iOS, with GST invoicing and expense tracking.
• Tally App: Limited features but useful for checking GSTINs and generating invoices.
• Invoice2Go: Simple app for creating GST invoices and tracking payments. Free plan available.

Frequently Asked Questions