How to Create a GST Invoice Online for Free in India (2026 Guide)

Running a freelance business or digital agency in India is incredibly rewarding. However, it also brings a fair share of compliance requirements. Foremost among these is generating tax-compliant bills. Knowing how to create GST invoice online free India is critical to keeping your accounting records clean, ensuring your clients can claim Input Tax Credit (ITC), and keeping tax authorities happy.

In this guide, we will break down what a GST tax invoice is, the mandatory fields required by Indian tax law, and how you can generate one in less than 10 seconds for free using Khatago.

What is a GST Tax Invoice?

A GST tax invoice is a legal document issued by a registered supplier to a buyer, detailing the products or services supplied, their taxable value, and the tax charged. In India, under the Goods and Services Tax framework, there are strict rules regarding what constitutes a valid invoice.

Without a proper GST tax invoice, your client cannot claim their Input Tax Credit (ITC). This makes compliance not just a legal obligation for you, but also a crucial relationship factor for your corporate clients.

Mandatory Fields of a GST Tax Invoice in India

To ensure your tax bills are valid, the Government of India requires specific information. Missing even one of these fields could invalidate your document:

  • Invoice Number & Date: A consecutive serial number containing only alphabets, numerals, or special characters (hyphen or slash), unique for a financial year.
  • Supplier Details: Your legal name, registered billing address, and GSTIN (GST Identification Number).
  • Recipient Details: The buyer's legal name, billing address, and their GSTIN (if they are registered).
  • Place of Supply: The state in which the services are consumed. This determines the tax type (interstate vs. intrastate).
  • HSN or SAC Code: Harmonized System of Nomenclature (for goods) or Service Accounting Code (for services).
  • Line Item Description: Detailed list of items, quantities, units of measurement, and unit rates.
  • Taxable Value & Discounts: The base value before taxes and any applicable discounts.
  • Tax Splits (CGST, SGST, IGST): The percentage rate and absolute values of tax splits.
  • Authorized Signature: A signature or stamp of the company representative.

    • Step-by-Step Guide to Creating a GST Invoice with Khatago

    To create GST invoice online free India, you don't need a chartered accountant or expensive enterprise software. Khatago provides a direct, zero-install invoicing utility. Here is how you can issue your tax bill:

    Step 1: Add Seller and Client Details

    Start by entering your business name, address, and your 15-digit GSTIN. Next, enter your client's details. If your client is registered under GST, make sure to enter their GSTIN. Khatago provides an automated GSTIN verification feature that will verify the active number and auto-fill the client's official address and state code.

    Step 2: Set Place of Supply

    Select the correct "Place of Supply" (State). If your client's business address is in a different state from yours, it counts as an interstate transaction, and you must apply IGST (Integrated GST). If the client is in the same state, it is an intrastate transaction, and you must divide the tax rate equally between CGST (Central GST) and SGST (State GST). Khatago handles this calculation automatically based on the selected state code.

    Step 3: Enter HSN/SAC Codes and Items

    Add your billing lines. For software services, consulting, or marketing, you will use a Service Accounting Code (SAC). For instance, web design services typically fall under SAC 998314. Enter the description, quantity, and rate. You can also toggle the "Tax Mode" to "Inclusive" or "Exclusive". If a client agrees to a flat package of ₹50,000 inclusive of tax, Khatago will reverse-calculate the base price and tax split automatically.

    Step 4: Preview and Download PDF

    Review your invoice. Make sure that all calculations look clean and complete. Once satisfied, click "Generate Bill" or "Download PDF". You can also directly share the invoice link with your client on WhatsApp or email, complete with a scannable UPI QR code for fast payment.

    Interstate vs. Intrastate GST Breaks

    For freelancers, tax splits are often confusing. The rule is simple:

  • Intrastate (Same State): If your business is registered in Maharashtra and your client is also in Maharashtra, you apply CGST and SGST. If the total tax rate is 18%, you split it as 9% CGST and 9% SGST.
  • Interstate (Different States): If you are in Maharashtra and your client is in Karnataka, you apply a single 18% IGST.

    • difference between CGST SGST IGST

    Why Use Khatago to Generate Invoices?

    Unlike legacy accounting software, Khatago is built specifically for modern service providers. There are no paywalls, complex dashboards, or configurations. It is designed to get out of your way:

  • Zero Configuration: Open the site and start billing.
  • UPI QR Codes: Automatically inserts a secure payment code so clients can scan and pay instantly.
  • WhatsApp Integration: Share PDFs directly with clients in one click.
  • Auto HSN/SAC Validation: Built-in directory for standard freelancer service codes.

    • free GST invoice generator