GST Composition Scheme Billing Rules: Bill of Supply Format for MSMEs

The GST composition scheme is designed for small businesses that want simpler compliance: pay tax at a fixed low rate on turnover, file returns less often, and skip the complexity of regular GST invoices. But the scheme also comes with hard limits — you cannot charge GST on bills, your buyers cannot claim ITC, and you cannot make inter-state supplies.

This guide explains who can opt for composition, the current rates, how a bill of supply looks, and the billing mistakes that get composition dealers into trouble. Educational only — confirm eligibility and rates with your CA before you opt in or out.

Key Takeaways

• Composition is for small taxpayers with aggregate turnover up to the notified limit (commonly discussed as ₹1.5 crore for goods; lower for services — confirm the current notification with your CA).
• You issue a bill of supply, not a tax invoice, and you must not collect GST from customers.
• Composition tax is paid from your own pocket on turnover at a prescribed rate (goods and restaurants have historically used different rates such as 1% and 5% — verify the rate that applies to you today).
• Buyers cannot claim input tax credit on purchases from a composition dealer.
• Inter-state outward supplies of goods and most services are generally not allowed under composition.

Who Can Opt for Composition?

Composition is meant for manufacturers, traders and restaurants (and certain service providers under related schemes) whose aggregate turnover in the previous financial year stays within the prescribed limit. Aggregate turnover is computed PAN-wise across all GSTINs of the same person.

You typically cannot opt for composition if you:

• Make inter-state outward supplies of goods (or fall into other notified exclusions).
• Supply goods through an e-commerce operator who is required to collect TCS (check current exclusions).
• Are a non-resident taxable person or a casual taxable person.
• Manufacture goods notified as ineligible for composition.
• Have already crossed the turnover threshold for the year.

Service providers (other than restaurants / notified categories) often use a separate composition-style option with its own turnover cap and rate. Do not assume the goods composition rules apply to a pure service business.

Typical Composition Rates (Confirm Before You Use)

Rates and eligibility notifications change. Treat the table as orientation, not a rate card.

Bill of Supply vs Tax Invoice

A regular registered taxpayer under the normal scheme issues a tax invoice showing CGST/SGST or IGST. A composition taxpayer issues a bill of supply. The bill of supply must not show a GST amount charged to the customer. Many states expect a clear statement such as: "Composition taxable person, not eligible to collect tax on supplies".

Practical fields on a composition bill of supply:

1. Your business name, address and GSTIN.
2. Unique sequential document number and date.
3. Customer name (and GSTIN if known for B2B records).
4. Description of goods/services, quantity and value.
5. Total amount payable — without a GST line.
6. Composition declaration wording.
7. Signature or digital acknowledgement.

Worked Example: Kirana Composition Dealer

Ramesh runs a kirana store in Mysuru under composition. A regular customer buys grocery items totalling ₹2,450. Under composition:

• Bill of supply total = ₹2,450 (no CGST/SGST lines).
• Ramesh still pays composition tax on his turnover at the prescribed rate when he files — that tax is not collected from this customer as a separate GST line.
• If the same customer were a registered wholesaler wanting ITC, they would prefer buying from a regular GST dealer who issues a tax invoice.

Composition works well when most buyers are end consumers. It becomes awkward when your main customers are GST-registered businesses that need ITC.

Returns and Compliance Rhythm

Composition dealers typically file a simpler return cycle than monthly GSTR-1/GSTR-3B filers (historically an annual return with quarterly tax payments — confirm the current form names and due dates). Missing a payment due date can attract interest. Keep your books ready so turnover for composition tax is easy to compute.

Track turnover carefully during the year. Crossing the threshold mid-year usually means you must migrate to the regular scheme from the day you cross — and start issuing tax invoices correctly from that point.

Common Billing Mistakes

• Showing GST on the bill: Customers then think they can claim ITC; both sides get confused during audits.
• Using the word "Tax Invoice": Use "Bill of Supply" as the document title.
• Forgetting the composition declaration: Add the mandated wording on every bill.
• Making inter-state sales: Often not permitted — check before you expand to other states.
• Mixing schemes without advice: Opting in/out has timing rules. Speak to your CA before switching.

Should You Stay on Composition?

Stay if your buyers are mostly B2C, your turnover is comfortably inside the limit, and you value simpler compliance over ITC. Switch to regular GST if B2B customers demand tax invoices with ITC, you need to sell inter-state, or your input GST is high enough that credit would outweigh composition simplicity.

Run the numbers with your CA once a year: composition tax paid vs ITC you would have claimed under the regular scheme.

How to Opt In and What Changes on Day One

Opting into composition is done through the GST portal with the prescribed form and effective date rules. Once approved, update every template your staff uses: POS print layout, Word/Google Doc bill, WhatsApp PDF tool, and accounting software. Rename the document title to Bill of Supply, remove CGST/SGST columns, and add the composition declaration in a font large enough to read on a thermal slip.

Train anyone who raises bills: they must not "just add 18%" because a customer asked for GST. If a B2B customer insists on ITC, explain politely that composition supplies do not give them credit, and decide whether that customer relationship justifies moving to the regular scheme later.

Inventory Purchases While on Composition

You will still buy from regular GST dealers who charge tax on their invoices. That GST generally becomes a cost because composition taxpayers cannot claim ITC. Build it into your pricing. Keep purchase invoices organised anyway — they support expense books and any future scheme change.

If you stock both composition-eligible and ineligible goods, review product mix with your CA. Manufacturing notified goods can knock you out of eligibility.

Branch and Multi-State Reality Check

Composition is awkward for businesses that want to expand across state borders quickly. A Bengaluru trader who starts fulfilling Hyderabad wholesale orders may discover that inter-state outward supplies are not allowed under composition. Plan expansion with GST structure in mind before you hire a salesperson in another state.

Frequently Asked Questions

Can a composition dealer use e-commerce marketplaces?

Often restricted where the operator must collect TCS. Confirm current rules before listing on marketplaces.

Can I show my UPI QR on a bill of supply?

Yes. Payment method is separate from GST document type. A clear UPI QR helps collections.

Do I need HSN codes on a bill of supply?

HSN reporting rules still matter for returns and clarity. Ask your CA what digit length you must show for your turnover.

What if I accidentally charged GST while on composition?

Do not ignore it. Speak to your CA about correction, credit notes or other compliance steps. Continuing to collect tax you are not allowed to collect creates risk.

Disclaimer: This article is for general education only. Composition eligibility, rates, forms and restrictions change through CBIC notifications. Confirm your position with a qualified Chartered Accountant before opting in, opting out, or changing your billing format.