Free GST Invoice Generator

Under India's GST regime every registered business must issue a tax invoice that shows the correct split of CGST, SGST or IGST depending on whether the sale is intra-state or inter-state. This generator handles that split automatically and produces a print-ready GST invoice PDF.

GST Invoice Generator

From

Business name

Address

Phone

GSTIN

Logo

Bill To

Client name

Address

Client GSTIN

Place of supply

Intra-state (CGST + SGST). Off = Inter-state (IGST).

Invoice #

Date

Due Date

Currency symbol

Line items

Description 1

HSN/SAC

Qty

Rate

GST%

Amount

$118.00

Notes

Subtotal: $100.00
CGST: $9.00
SGST: $9.00
Total: $118.00

What the GST Invoice Generator does

A GST invoice (tax invoice) is the document Indian law requires a GST-registered supplier to issue for a taxable sale, showing the taxable value, GSTIN of both parties, HSN/SAC codes, and the CGST/SGST or IGST charged. It is the primary evidence used to claim input tax credit.

Methodology and formula

Intra-state: CGST = SGST = (Taxable value x GST rate) / 2, each shown separately. Inter-state: IGST = Taxable value x GST rate, charged as one line.

Worked example

Inputs: Taxable value ₹50,000, GST rate 18%, intra-state supply within Karnataka.
Result: CGST ₹4,500 + SGST ₹4,500 = ₹9,000 total GST, grand total ₹59,000.

Because the buyer and seller are in the same state, the 18% splits evenly into CGST and SGST rather than being charged as a single 18% IGST line — getting this wrong is a common reason GST returns get flagged for reconciliation.

When to use this tool

Use this for any taxable supply made by a GST-registered business in India. If you later need to reduce or cancel that invoice, use the Credit Note Generator; if you're billing before delivery to secure a PO, use a Proforma Invoice instead.

About the GST Invoice Generator

CGST + SGST vs IGST

When the place of supply is in the same state as the supplier, GST is split equally into CGST (Central) and SGST (State). When the supply crosses state lines, the entire GST is levied as IGST (Integrated). Toggle the intra/inter-state switch and the totals recalculate automatically.

GSTIN and HSN codes

A compliant tax invoice must include the supplier's and recipient's GSTIN (where registered) and a valid HSN or SAC code for each line item. This tool gives you dedicated fields for both so nothing is missed at filing time.

Rounding and totals

GST amounts are calculated per line and then summed, which matches the approach expected by GSTR-1 filings. The invoice shows taxable value, individual tax components, and the final grand total.

Frequently asked questions

Is this a GST-compliant tax invoice?

Yes — it includes the mandatory GSTIN, HSN, taxable value, and CGST/SGST/IGST breakdown fields required for a GST tax invoice.

How do I know if the sale is intra or inter-state?

If the place of supply and your business location are in the same state, it's intra-state (CGST + SGST). Otherwise it's inter-state (IGST).

Can I add multiple GST rates?

Yes. Each line item has its own GST rate field so you can mix 5%, 12%, 18% and 28% items on a single invoice.

Does the PDF include the HSN/SAC column?

Yes, when an HSN or SAC is entered it appears against the corresponding line on the PDF.

Related Invoicing Tools

Other free tools in the invoicing silo.

Invoice Generator

Create professional invoices with line items, tax, and totals — download as PDF in seconds.

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Proforma Invoice Generator

Create a proforma invoice — an estimated, pre-delivery bill for approvals and POs.

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Credit Note Generator

Cancel or adjust an issued invoice with a formal credit note PDF.

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