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Your GST invoice

Every pass and every pack of AI readings you buy comes with a GST tax invoice. You give your state and an email when you buy, and your firm's GSTIN too if your firm is registered for GST, so that your firm can claim the GST back. We email the invoice to you, and it is also on your account page after you pay.

Checked against RateAnalyser on 26 October 2026

GST is added to the price of a pass or a pack when you pay, as its own line on your invoice. The window where you buy shows it before you pay.

How to get the invoice you need

  1. In the window where you buy a pass or a pack of AI readings, choose Your state. It goes on your GST invoice, and you cannot pay without it.
  2. Write your Email for your invoice. We use this email to send you the invoice, and you cannot pay without it either.
  3. If your firm is registered for GST, press + Add your firm's GSTIN. A box Your firm, for the GSTIN opens. Fill all four: Firm name, Address, Pincode and GSTIN. Press Remove to close it again, and then none of them is sent.
  4. Check Price, GST at 18% and You pay, then press Pay.
  5. After the payment, the window says Payment done and that we are sending your tax invoice to your email, with the PDF attached.
  6. To get it again, open your account page. In the panel Payments, press Tax invoice with its number, and the PDF is saved.
The Buy window with Your state chosen, the box Your firm, for the GSTIN open with its four fields, and the lines Price, GST at 18% and You pay
The window where you buy a pass, with the firm's GSTIN added.

Things to know

  • Your state decides how the GST is split on the invoice. For Delhi it is CGST and SGST in two equal halves, and for any other state it is IGST. What you pay is the same either way.
  • The first 2 digits of a GSTIN are its state, and the state you choose must match it. The check also catches a mistyped character, before anything is charged.
  • Add the GSTIN before you pay. The invoice is made from the details you gave when you paid, and it cannot be changed after it is made. If a detail is wrong, write to admin@revenin.com.
  • The next time you buy, the window starts with the details from your last order.
  • The invoice is emailed once, to the email you gave. It is also on your account page, in Payments, which says Sent to your email once it has gone.
  • If money is paid back to you, a Credit note appears beside the Tax invoice of that payment.
How it is worked out

The GST is a share of the price of the pass, and the invoice shows it as its own lines. For an example price of 1,000 before GST:

GST = Price x 18 / 100, and You pay = Price + GST
LineBuyer in DelhiBuyer in another state
Price1,000.001,000.00
CGST at 9%90.00not charged
SGST at 9%90.00not charged
IGST at 18%not charged180.00
You pay1,180.001,180.00

If you see this message

Please choose your state.

Choose your state from the list. It is needed on every invoice.

Please write an email, we send the invoice there.

Write the email where we should send your invoice. You cannot pay without it.

Please check this email address.

An email has one @ and a dot after it, like name@example.com. Check it for a missing letter.

Please write your firm address, building and street is enough.

Write the address of your firm in that box. Building and street is enough.

A pincode is 6 digits.

Type the 6 digits of your firm's pincode.

This GSTIN does not look right. A GSTIN is 15 characters, like

Check each character of your GSTIN against your registration.

This GSTIN is from

The message names the state of your GSTIN. Choose that state in Your state, or check the GSTIN again.

Still stuck? Write to admin@revenin.com.