Is it mandatory to put GST number on an invoice?

Asked by: Prof. Rolando Romaguera II  |  Last update: August 11, 2026
Score: 4.5/5 (44 votes)

Yes, it is mandatory to include your GST number (GSTIN) on an invoice if you are a registered business supplying taxable goods or services. A valid GST invoice must contain the supplier's name, address, GSTIN, and the recipient's details to be compliant with tax regulations, ensuring proper tax calculation and ITC claiming.

Is it mandatory to mention GST number on an invoice?

Each GST bill must have its specific number. This number must be serial and can include letters, numbers, or special characters like a dash or a slash (e.g., INV/001 or 2025-001). Along with this, the date on which the invoice is issued must also be clearly mentioned.

Does an invoice have to include GST?

Step 3: Tax information on invoices

Simple invoices don't require tax information, but a tax invoice needs to include the GST amount for the goods and services you're supplying.

Is GST required on an invoice?

Collect – To collect GST, you have to prepare a GST-compliant invoice, which includes your nine-digit registration number, date, and GST rate. Inform your clients beforehand that you will charge GST separately and include the registration number and GST rate in the contract.

Can we invoice without GST?

According to the current GST regulations, businesses that have an annual turnover below the prescribed threshold can issue invoices without adding GST.

Invoices: What You NEED TO KNOW

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Do you need to include GST in your invoice?

If your invoice is between $200 and $1,000, it must include: Everything mentioned above, as well as. Your GST number. An indication the price recorded includes GST.

What if I don't have a GST number?

As per the 48th GST Council Meeting, unregistered suppliers can sell goods intra-state through online marketplaces. All other sellers must mandatorily register for GST, and file GST returns accordingly. The conditions for sale without GST registration are: Your total turnover is below the threshold all across India.

Do I need to charge GST if I earn under $75000?

If your GST turnover is below the $75,000 threshold, you may choose to register. But if you do, regardless of your turnover, you must: include GST in the price of most goods and services you sell. claim GST credits for most business purchases you make.

What are the rules for GST invoicing?

GST invoices must include the following details, and should be retained for at least 6 years.

  • Supplier details and GST number.
  • Supplier digital signature.
  • Invoice number and date.
  • Customer details and GST number.
  • Details of taxable goods (including HSN code) or/and services.
  • Quantity of goods.
  • Delivery state.

What is exempt from the GST tax?

Key items exempted from GST:

Prepared foods and snacks: Vegetable trays, pre-made meals, salads, sandwiches, chips, candy, granola bars, etc. Dining: Restaurant meals (dine-in, takeout, or delivery). Beverages: Beer, wine, cider, and sake.

Can I invoice without GST?

Which one your business uses depends on whether your business is registered for goods and services tax (GST). Tax invoices – GST-registered businesses must use these. It shows the GST on the goods or services you've sold. Regular invoices – businesses that aren't registered for GST use invoices that don't show any tax.

How to pay GST without GST number?

How can an unregistered person make the payment? An unregistered person should create a challan and after making the payment, he/she needs to take the print of that challan (along with other documents) to the State Advance Ruling Authority Office.

What information is required for an invoice?

Similar to your business information, you'll need to include the name, address, and contact details of the client or business you're billing. Assign a unique identification number to each invoice. This helps both parties reference the transaction in the future, in case of a dispute.

Who is exempt from GST?

Small businesses in Australia who turn over less than $75,000 per year don't have to pay GST. If you're a registered not-for-profit, you also don't have to pay GST as long as your turnover is less than $150,000. If you run a taxi service or are an uber driver, for example, you must always pay GST, regardless of income.

At what amount is GST mandatory?

What is the Minimum Turnover Limit for GST Registration? Businesses are required to register for GST and pay tax on their annual turnover if their annual revenue exceeds Rs. 40 lakhs in the case of goods supplied and Rs. 20 lakhs for the supply of services.

What if someone is not registered for GST?

If you don't register for GST and are required to, you may have to pay GST on sales made since the date you were required to register. This could happen even if you didn't include GST in the price of those sales. You may also have to pay penalties and interest.

Do you have to put customers VAT number on an invoice?

You'll only need to show a VAT number on your invoices if your business becomes VAT registered, but VAT registration isn't a requirement for starting or operating a business. So, if you're not VAT registered, and you don't need to be, you can simply send invoices as normal.

What are the rules for invoicing?

Manner of Issuing Invoice

The invoice shall be prepared in triplicate, in case of supply of goods, in the following manner: (a) The original copy being marked as ORIGINAL FOR RECIPIENT; (b) The duplicate copy being marked as DUPLICATE FOR TRANSPORTER; and (c) The triplicate copy being marked as TRIPLICATE FOR SUPPLIER.

Who does not need a GST number?

You're considered a small supplier as long as your gross revenue remains less than $30,000 over any 4 consecutive calendar quarters. This means you're not required to register for GST/HST.

What happens if I don't file GST?

Therefore, upon non –filing of GST returns or missing out the GST due dates, the GST law prescribes a general penalty. The maximum penalty that may be imposed is Rs. 5,000. The taxpayer will be required to pay interest on late payment of GST at a rate of 18% annually in addition to the late payment penalty.

What happens if there is no GST?

In India, failing to obtain GST registration when required can lead to severe penalties. According to Section 122 of the CGST Act, any taxable person who fails to register for GST must pay a penalty of ₹10,000 or the amount of tax evaded, whichever is higher.