You've started your new business and completed GST registration. Now you need to create your first invoice.

The process is straightforward: enter your GSTIN, assign the right invoice number, capture buyer details correctly. Let's walk through the complete process step by step.

Step 1: Complete GST Registration

If you haven't registered for GST yet, here's what to do:

  • Visit www.gst.gov.in
  • Apply for GST using Form REG-01
  • Approval takes 3-7 days
  • You'll receive your GSTIN certificate (a 13-digit number)

After receiving your GSTIN, you can create invoices. Your first invoice must be dated on or after your GST registration date for legal compliance.

Detailed Steps to Create Your Invoice

Step 1: Gather Your Business GSTIN

Download your GSTIN from the GST portal:

  • Log in to www.gst.gov.in
  • Your GSTIN is a 13-digit number
  • Format: 27AABCD1234D1Z5 (27 represents Maharashtra; the rest is your unique ID)
  • Make note of this number—you'll need it when creating invoices

Step 2: Establish Your Invoice Numbering Sequence

Invoices must be numbered sequentially (001, 002, 003... or 1001, 1002, etc.):

  • Decide on your starting number (we recommend 001 or 1001)
  • Maintain consistent formatting and sequential order—this is mandatory
  • GST auditors review this carefully (skipped numbers raise red flags)
  • GSTBill automatically increments your invoice numbers

Step 3: Collect Your Buyer's Information

When creating an invoice, you'll need the following buyer details:

  • Buyer's legal name (not their trade name)
  • Buyer's GSTIN (if they're GST-registered)
  • Buyer's complete address
  • Buyer's state code (derived from their GSTIN)
  • If the buyer is an unregistered consumer, include whatever details you have available

Step 4: Prepare Your Goods or Services Details

Your invoice must include the following for each item:

  • Product or service name (describe exactly what you're supplying)
  • HSN/SAC code (a 6-digit identifier for the product or service)
  • Quantity and unit of measurement (for example, 50 kg, 100 pieces)
  • Unit price (excluding GST)
  • Applicable GST rate (5%, 12%, 18%, or 28%)

Step 5: Choose Your Invoice Creation Tool

Option A: Use GSTBill (Recommended for beginners):

  • Open WhatsApp
  • Message GSTBill (just say "Hi")
  • Enter your GSTIN (only once)
  • Enter the buyer's GSTIN
  • Add your items
  • Your PDF invoice is ready in 60 seconds

Option B: Download a Template (Manual approach):

  • Download a template from www.gstbill.app/gst-bill-format
  • Open it in Excel or Word
  • Fill in the details manually
  • Print or export as PDF

Step 6: Generate Your Invoice PDF and Send It

Once your invoice is ready:

  • Download the PDF
  • Review all details to ensure accuracy
  • Add a digital signature if needed (though this is usually optional)
  • Send it to your buyer via WhatsApp, email, or print a physical copy

Essential Checklist Before Creating Your Invoice

Before you create your invoice, verify these details:

  • Your GSTIN is entered correctly (your name and address will auto-populate)
  • Buyer's GSTIN is correct (if they're GST-registered)
  • Invoice numbers are sequential (starting with 001 or 1001)
  • Invoice date is correct (today's date)
  • Place of supply is listed (the buyer's state code)
  • HSN code is included (6-digit code for each product)
  • CGST and SGST (or IGST) are calculated correctly based on state codes
  • Total amount is accurate (taxable value plus GST)
  • Buyer details are complete (name, address, and GSTIN)

Common Mistakes Beginners Make

  • Missing or incorrect GSTIN: This makes the invoice invalid
  • Buyer's GSTIN not included: The buyer may not be able to claim Input Tax Credit
  • Missing HSN code: This violates Rule 46 (invoices over ₹1,50,000 become invalid)
  • Skipped invoice numbers: GST auditors flag these as discrepancies
  • Including both CGST/SGST and IGST: This is incorrect (use either CGST+SGST or IGST, never both)
  • Using handwritten invoices: This is risky—always use digital invoices

Using GSTBill for Your First Invoice (Recommended)

Step-by-Step Beginner-Friendly Process:

  1. Open WhatsApp on your phone
  2. Message GSTBill at 15551916646 with just "Hi"
  3. The system will respond with an interactive form
  4. Enter your GSTIN → your name, address, and state auto-populate
  5. Enter the buyer's GSTIN → their details auto-populate
  6. Add your products/services (name, HSN code, quantity, and rate)
  7. The system automatically calculates CGST/SGST or IGST
  8. Review the details and confirm
  9. A professional PDF invoice is delivered via WhatsApp
  10. Forward it to your buyer or print it if needed

Related Resources:

After Your First Invoice—Streamlining the Process

Once you've created your first invoice, things get faster:

  • Repeat customers are saved (next time, just one tap to select)
  • Your products are saved with their details (name, HSN code, rate)
  • Invoice numbers increment automatically
  • Creating subsequent invoices takes just 20-60 seconds

Create Your First GST Invoice in 60 Seconds

Open GSTBill, enter your GSTIN, and you're done. Beginner-friendly, no confusion, 100% compliant.

Start Your First Invoice Now →

GST registration → GSTIN → First invoice → Repeat. That's the complete process.