Advanced GST Calculator & Invoice Maker

Q: What are the mandatory fields in a GST invoice?

As per Rule 46 of the CGST Rules, 2017, a valid invoice must include: supplier's name, address, and GSTIN; a consecutive invoice number; date of issue; buyer's name and GSTIN (if registered); HSN/SAC codes; taxable value; and a clear breakdown of tax amounts.

Q: Is this invoice format compliant with Indian GST laws?

Yes, this tool generates invoices incorporating all mandatory fields required for B2B and B2C transactions in India, updated for the latest FY 2026-27 guidelines and rounding-off standards.

Generate professional, Rule 46 compliant tax invoices with multi-item support, HSN codes, automatic CGST/SGST/IGST splitting, and instant PDF download.

📅 Updated: September 2026 • ⚖️ Compliant: CGST Rules, 2017 (Rule 46) • 🔒 Private: 100% Client-Side Processing

1. Invoice & Party Details

Seller Business Name

Seller GSTIN

Seller Address

Buyer Name

Buyer GSTIN (Optional)

Buyer Address

Invoice No.

Date

Place of Supply

Inter-State Supply? (Applies IGST)

2. Add Items

Description	HSN	Qty	Rate (₹)	Disc (₹)	GST%

Total Taxable Value

₹0

Total GST Amount

₹0

Grand Total
₹0
Zero Rupees Only

3. Live Invoice Preview

Tax Invoice

GSTIN:

Billed To:

GSTIN:

Invoice No:

Date:

Place of Supply:

Reverse Charge: No

#	Description & HSN	Qty	Rate	Disc	Taxable	CGST	SGST	Total

Subtotal	₹0.00
CGST	₹0.00
SGST	₹0.00
IGST	₹0.00
Round Off	₹0.00
Grand Total	₹0.00

Tax Breakdown Visualization

📐 GST Calculation Methodology

Taxable Value = (Quantity × Rate) − Discount
GST Amount = Taxable Value × (GST Rate / 100)
Intra-State: CGST = GST Amount / 2 | SGST = GST Amount / 2
Inter-State: IGST = GST Amount
Grand Total = Taxable Value + Total GST (Rounded to nearest Rupee)

Client-Side Execution: All calculations run locally in your browser. No financial data is transmitted to any server.
Rule 46 Compliance: The generated PDF includes all mandatory fields as per the CGST Rules, 2017, including HSN codes, tax breakdowns, and authorized signatory space.
Rounding Off: The final grand total is rounded to the nearest rupee as per standard Indian accounting practices, with the difference recorded as "Round Off".

Researched & Maintained by the KitnaPaisa Financial Team

KitnaPaisa provides free, transparent financial tools for Indian businesses and retail users, adhering to standard regulatory norms and privacy-first design.

Frequently Asked Questions

How is GST calculated on an invoice? ▼

GST is calculated by applying the applicable GST rate (e.g., 18%) to the taxable value of the goods or services. If the supply is intra-state, the GST is split equally into CGST and SGST. If it is inter-state, it is charged as IGST.

What are the mandatory fields in a GST invoice? ▼

A valid GST invoice must include the supplier's name, address, and GSTIN; a consecutive invoice number; date of issue; buyer's name and GSTIN (if registered); HSN/SAC codes; taxable value; and a clear breakdown of CGST, SGST, and IGST amounts.

Is this invoice format compliant with Indian GST laws? ▼

Yes, this tool generates invoices based on Rule 46 of the CGST Rules, 2017, incorporating all mandatory fields required for B2B and B2C transactions in India, updated for the latest FY 2026-27 guidelines.