GST Billing Tool

What is a GST Bill and Who Needs to Issue One?

A Goods and Services Tax (GST) Bill, commonly referred to as a GST Tax Invoice or Bill of Supply, is an essential commercial and legal document issued by a registered business in India whenever taxable or exempt goods or services are supplied to a customer. Under the GST framework governed by the Central Board of Indirect Taxes and Customs (CBIC), every GST-registered entity—including freelancers, micro-enterprises, manufacturers, distributors, and service providers—is legally obligated to issue GST-compliant bills for commercial transactions.

Issuing a valid GST bill serves multiple vital purposes: it establishes proof of sale, acts as a binding demand for payment, details the applicable tax rates, enables business-to-business (B2B) buyers to claim Input Tax Credit (ITC) under GSTR-2B, and maintains full compliance during monthly GSTR-1 and GSTR-3B return filings. Whether you operate a retail store, run a digital service agency, or supply raw materials, using a reliable online GST billing tool ensures your billing records adhere to statutory Indian tax standards without manual math errors.

Key Fields Required in a GST-Compliant Bill

To be legally valid under Rule 46 of the Central Goods and Services Tax (CGST) Rules, 2017, a tax invoice issued by a registered taxpayer must contain specific mandatory fields. Omission of these key attributes can render the document invalid for auditing and cause Input Tax Credit rejections for your clients:

1. Supplier Information: Legal business name, trade name, registered office address, contact details, and 15-digit GST Identification Number (GSTIN).
2. Document Identification: Serialized document title ("Tax Invoice" or "Bill of Supply"), unique consecutive invoice serial number (up to 16 alphanumeric characters containing slashes or dashes), date of issue, and optional payment due date.
3. Recipient Details: Name, billing address, shipping address, place of delivery, and client GSTIN (mandatory for B2B transactions, optional for unregistered B2C consumers).
4. Place of Supply: The state where the goods are delivered or where the service is deemed supplied, which determines whether intra-state (CGST+SGST) or inter-state (IGST) tax laws apply.
5. Itemized Breakdown: Description of goods/services, mandatory HSN (Harmonized System of Nomenclature) code for goods or SAC (Services Accounting Code) for services, quantity, unit of measurement, rate per unit, and total item value.
6. Tax Computations & Disclosures: Taxable value after trade discounts, applicable GST percentage slab (0%, 5%, 12%, 18%, 28%), itemized split of CGST, SGST/UTGST, or IGST, total GST amount, and grand total in words and figures.
7. Statutory Declarations: Indication whether tax is payable under Reverse Charge Mechanism (RCM), digital signature or physical authorized stamp of the supplier, and banking payment details.

CGST, SGST & IGST — How Tax Splits Work

The GST framework in India is a dual system where both the Central Government and State Governments simultaneously levy taxes on taxable transactions. The applicable tax split depends directly on the location of the supplier relative to the Place of Supply:

• Intra-State Supplies (Same State): When the seller's registered business state and the buyer's place of supply are within the same state or union territory (e.g. Maharashtra to Maharashtra), the transaction is classified as intra-state. The total GST rate is divided equally into Central GST (CGST) and State GST (SGST) or Union Territory GST (UTGST). For example, on an 18% GST item, 9% is calculated as CGST and 9% as SGST.
• Inter-State Supplies (Different States): When the transaction crosses state boundaries (e.g. Maharashtra to Delhi) or involves exports/SEZ units, it is classified as an inter-state supply. Integrated GST (IGST) applies at the full statutory GST rate (e.g. 18% IGST), which is collected by the Central Government and subsequently apportioned to the destination state.

MoneyUtility's GST Billing Tool automatically detects whether your business state matches your client's state, instantly applying the correct CGST+SGST or IGST calculation split without manual intervention.

Tax Invoice vs Bill of Supply: Which Should You Issue?

Understanding the precise distinction between a Tax Invoice and a Bill of Supply is critical to avoid compliance penalties and administrative rework:

• Tax Invoice: Issued by regular GST-registered taxpayers supplying taxable goods or services. A tax invoice explicitly itemizes the GST rate, taxable value, and tax amounts charged to the buyer. B2B buyers require a valid Tax Invoice to claim Input Tax Credit (ITC) against their output GST liability.
• Bill of Supply: Issued in scenarios where GST cannot or should not be charged to the customer. A Bill of Supply is legally required when the seller is under the Composition Scheme, supplying tax-exempt goods/services, or operating as an unregistered business below statutory thresholds.

HSN/SAC Codes and GST Rate Slabs Explained

Harmonized System of Nomenclature (HSN) codes and Service Accounting Codes (SAC) are international and domestic standardized numerical codes used to classify products and services under uniform GST tax rates across India:

• HSN Codes (Goods): 4-digit, 6-digit, or 8-digit codes classifying physical commodities. Businesses up to ₹5 Crores turnover declare 4-digit codes; businesses above ₹5 Crores declare 6-digit codes.
• SAC Codes (Services): 6-digit codes starting with '99' that classify technical, professional, and digital services (e.g. SAC 998314 for IT consulting).

Why Choose MoneyUtility's GST Billing Tool?

• 100% Client-Side Privacy: All data inputs remain local to your browser sandbox with zero external server storage.
• Automatic Dual Tax Logic: Smart switching between intra-state (CGST+SGST) and inter-state (IGST) computations based on state selection.
• Custom Template Themes: 10 color themes with logo, signature, and stamp customization.
• Instant PDF Export: A4 formatted PDF download, PNG/JPEG export, and direct printing.