Yes, a GST invoice is mandatory for all registered businesses under the GST regime for the supply of goods or services. It acts as a legal document for tax compliance, enables buyers to claim input tax credit, and must contain specific details like the GSTIN, taxable value, and tax rates.
Invoice under GST
It is necessary for a person supplying goods or services or both to issue invoice. The type of invoice to be issued depends upon the category of registered person making the supply. For example, if a registered person is making supplies, then a tax invoice needs to be issued by such registered person.
You must have a tax invoice to claim a GST credit for purchases that cost more than A$82.50 (including GST). Your supplier has 28 days to provide you with a tax invoice after you request one. Wait until you receive it before you claim the GST credit, even if this is in a later reporting period.
If the Tax Invoice is not issued by the supplier timely, the recipient will not get the GST Credit on Input and hence, such credit can not be adjusted with the GST Outward Liability and hence, it will directly effect on the Working Capital.
According to the current GST regulations, businesses that have an annual turnover below the prescribed threshold can issue invoices without adding GST.
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.
Information needed to generate an invoice
For starters, most invoices should contain the following data: The issue date, payment due date and NET terms. Sender and recipient names and contact information. A unique and identifiable invoice number (for auditing)
The general rule is 30 days from the invoice date. However, you can discuss this with your customer and either make it shorter or longer than 30 days. Regardless of what you agree upon, the payment terms and the due date should be clearly stated on the invoice.
Grace periods typically range from 15 to 30 days. While technically a customer could wait until the exemption date to pay, insurers may still treat the premium as GST-inclusive based on the due date, not the payment date. ...
Penalty on Missing the GST Due Date:
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.
Know which invoice type you need
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.
You have to start charging the GST/HST on your date of registration, including on the sale that made you exceed the $30,000 threshold.
You can't claim GST credits on private expenses, employee wages, or purchases without a valid tax invoice. If you use something for both business and private purposes, you can only claim the business portion.
Regardless of if the sale is for goods or services, business-to-business (B2B) transaction should include an invoice outlining the details of the sale.
Penalties: In cases of non-generation of e-invoice, 100% of the tax or ₹10,000, whichever is higher, is the penalty for each invoice.
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.
Under the GST law, penalty for late filing of GST returns include a late fee of Rs. 50 per day (Rs. 25 each under CGST and SGST) for delayed return filing, capped at Rs. 5,000, and an interest rate of 18% per annum on outstanding tax amounts.
Starting September 22, 2025, GST in India will be simplified to primarily two rates: 5% and 18%, with a special 40% rate on luxury and sin goods like tobacco and high-end vehicles. Many essentials, including certain medicines and foods, are now zero-rated, while several items see reduced rates.
Stick within the legal time limit for invoicing.
Although the legal time limits for invoicing are usually forgiving, you should send invoices within 30 days to maintain a steady cash flow.
GST invoice should be issued within 30 days from the date of supply of service. In case of supply of banking or insurance services: GST invoice should be issued within 45 days from the date of supply of service.
What to do if a customer doesn't pay
Registered for GST: you need to write a tax invoice and include the GST for each applicable item. Not registered for GST: you can write a simple invoice (or 'regular invoice'), which doesn't need to include the GST for each item.