# What Is a Pakka Bill? The GST Invoice That Counts as Valid

**Category:** GST | **Published:** 2026-06-25 | **Last reviewed:** 2026-06-25 | **Author:** Mrs. Swapna Patel

A pakka bill is the everyday name for a GST tax invoice: a bill issued under Section 31 of the CGST Act that carries the seller GSTIN, an invoice number, and the GST tax breakup required by Rule 46. It is "valid" because it is the only sale document the law recognises for input tax credit and audit, unlike an informal kaccha bill.

> **Myth:** A pakka bill is just a neat, printed version of any shop bill.
>
> **Fact:** A pakka bill is specifically a GST tax invoice raised under [Section 31 of the CGST Act](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act); a printed slip without a GSTIN and tax breakup is not one.

## What is a pakka bill?

> **Short answer:** A pakka bill is a GST tax invoice: a sale document raised under [Section 31 of the CGST Act](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act) carrying the seller GSTIN, an invoice number, and the GST tax breakup. "Pakka" is the Hindi-English trade word for the bill the law treats as final and valid.

In everyday Indian business, "pakka" means proper, fixed, official. A pakka bill is the bill a registered seller must issue on a taxable sale. It is not a separate kind of document under GST law; it is the trade name for a tax invoice.

## What makes a bill "pakka" and not just printed?

> **Short answer:** A bill is pakka only when it carries every particular [Rule 46 of the CGST Rules](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-rules-as-amended) demands, starting with the seller GSTIN and the CGST/SGST or IGST split.

- The seller's name, address, and GSTIN. Without a GSTIN, a bill cannot be a tax invoice.
- A unique invoice number (up to 16 characters) and the date of issue.
- The GST rate and tax amount, shown as CGST plus SGST, or as IGST. The tax must be visible, not hidden inside the total.
- HSN code for goods or SAC code for services, plus the taxable value.

**[See every Rule 46 field a valid invoice must carry](https://hrareceipt.in/atlas/gst-tax-invoice-rule-46-field-anatomy)**

## Why is a pakka bill the "valid" bill?

> **Short answer:** Because [Section 16 of the CGST Act](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act) lets a buyer claim input tax credit only against a valid tax invoice, and only a pakka bill qualifies.

- For the buyer: the GST paid is recoverable as input tax credit only when held against a pakka bill. An informal slip means the tax is a sunk cost.
- For the buyer at income tax: a tax invoice is clean expense proof an assessing officer accepts; a rough note is weak.
- For the seller: issuing pakka bills records turnover correctly, which is what a GST check expects to see.

## When must you issue a pakka bill?

> **Short answer:** Any GST-registered seller must issue a tax invoice (a pakka bill) on a taxable supply of goods or services, per [Section 31](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act).

- Registered sellers on taxable supplies: a pakka bill is mandatory, not optional.
- Sellers under the composition scheme, or unregistered sellers below the GST threshold, issue a [bill of supply](/answers/non-gst-invoice-format-bill-of-supply) instead, since they cannot charge GST.
- A handwritten kaccha bill is never a substitute on a taxable sale. For the full contrast, see [pakka bill vs kaccha bill](/answers/pakka-bill-vs-kaccha-bill-gst-tax-invoice).

## Primary sources

- [Section 31, Central Goods and Services Tax Act 2017 — CBIC](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act) — Requirement to issue a tax invoice for a taxable supply.
- [Rule 46, Central Goods and Services Tax Rules 2017 — CBIC](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-rules-as-amended) — Mandatory particulars of a GST tax invoice.
- [Section 16, Central Goods and Services Tax Act 2017 — CBIC](https://www.cbic.gov.in/htdocs-cbec/gst/cgst-act) — Input tax credit allowed only against a valid tax invoice.

## Related

- [What is a kaccha bill — why the rough slip has no GST standing](https://hrareceipt.in/answers/what-is-a-kaccha-bill)
- [Pakka bill vs kaccha bill — which is a valid GST invoice](https://hrareceipt.in/answers/pakka-bill-vs-kaccha-bill-gst-tax-invoice)
- [GST tax invoice fields under Section 31 and Rule 46](https://hrareceipt.in/answers/gst-tax-invoice-fields-section-31-rule-46)
- [What is input tax credit — why a valid pakka bill carries it](https://hrareceipt.in/answers/what-is-input-tax-credit-itc)
- [What is a bill of supply — the GST document without tax](https://hrareceipt.in/answers/what-is-a-bill-of-supply)
- [Why move from a kaccha bill to a pakka bill — the upside of formalising](https://hrareceipt.in/answers/why-move-from-kaccha-bill-to-pakka-bill)
- [How to upgrade from a kaccha bill to a pakka bill (GST invoice)](https://hrareceipt.in/answers/how-to-upgrade-kaccha-bill-to-pakka-bill)

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*Source: [What Is a Pakka Bill? The GST Invoice That Counts as Valid](https://hrareceipt.in/answers/what-is-a-pakka-bill) — HRAReceipt.in*
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