Understanding Invoices & Payments

Understanding Your Invoice (PI vs INV)

By the Domain India teamPublished 8 min read
Knowledge base article
Contents (8 sections)

A Domain India invoice can carry up to three different numbers: a proforma number starting PI-, an invoice number starting INV- and, once it is paid, a GST tax invoice number starting TAX-. This guide explains what each one means, which document to give your accountant, and what to do when an invoice doesn't look right.

Key takeaways

Most invoices start as a Proforma Invoice (its number starts with PI-): a request for payment, not a tax document. When you pay, the same invoice gets an INV- number and a Tax Invoice is issued with its own number that includes the financial year (for example TAX-2026-27-009876). Give your accountant the tax invoice, downloaded with Download Tax Invoice from Invoices.

1. The three numbers at a glance

NumberExampleWhen it appearsIs it a tax document?
Proforma (PI-)Starts with PI-When an order, renewal or upgrade invoice is createdNo, it is a request for payment
Invoice (INV-)Starts with INV-When that invoice is paidIt is the invoice reference; use the tax invoice for GST
Tax invoice (TAX-)Starts with TAX- and the financial yearWhen the payment goes throughYes, this is the GST tax invoice

The PI- and INV- numbers include the calendar year. The TAX- number includes the Indian financial year, which runs from April to March, so 2026-27 means April 2026 to March 2027. The example numbers above are illustrations of the format, not real invoices.

2. The proforma invoice (PI-)

A proforma invoice is the bill you receive before you pay. It is created when:

  • you place a new order;
  • a renewal is due (renewal invoices are generated up to 30 days before the due date);
  • you upgrade a plan.

In the client area it is titled Proforma Invoice and marked with a Proforma label in your invoice list. It shows what you owe and by when, but it is not a tax invoice, so it cannot be used to claim input tax credit.

Domain India never charges a saved card automatically. A renewal happens only when you pay its invoice. If you don't want a service to renew, decline it on the Renewals page or leave the invoice unpaid; see How auto-renewal works.

3. After you pay: the INV- number and the tax invoice

When the payment is confirmed, two things happen to the same invoice:

  1. It gets a final invoice number starting with INV-. The original proforma number is kept as a reference, shown as Ref: PI-… in your invoice list and as Proforma Ref on the invoice page.
  2. A GST tax invoice is issued, numbered TAX- with the financial year. The invoice page is then titled Tax Invoice followed by that number, and shows the INV- number underneath.

A few invoices never have a proforma stage, for example some add-ons paid at once, so they carry an INV- number from the start. Some older invoices kept their PI- number after payment. In every case, the tax invoice is the document that counts for GST.

4. What the tax invoice shows

The tax invoice carries the GST details your accountant needs:

  • Domain India's GSTIN, 33AAFCD9427N1Z9;
  • your GSTIN, if it was on your account when you paid;
  • the Place of Supply, taken from your billing state;
  • SAC code 998315 against each item;
  • the taxable value, the tax and the total.

Domain India charges 18% GST. Domain India is registered in Tamil Nadu, so the split depends on your billing state:

Your billing stateTax on the invoiceTotal tax
Tamil NaduCGST 9% + SGST 9%18%
Any other Indian state or union territoryIGST 18%18%

Customers without a GSTIN still receive a tax invoice. For how GST applies in more detail, see Understanding GST on Hosting Services.

5. What the invoice statuses mean

StatusWhat it meansWhat to do
Payment DueWaiting for payment (listed under the Pending tab of your invoice list)Pay it before the due date, or leave it if you don't want the service
Payment OverdueThe due date has passed and it is still unpaidPay it if you want to keep the service
Payment ReceivedPayment confirmed; the tax invoice is availableDownload the tax invoice for your records
Cancelled or VoidThe invoice was withdrawn and nothing is owed on itNothing
RefundedThe payment was refundedKeep the record; ask your CA how to account for it

6. View and download your invoices

  1. Sign in.
    Go to the client area and open Billing › Invoices, or go straight to /client/invoices.
  2. Find the invoice.
    Filter by status or search by number. Each row shows the number, the amount and the status.
  3. Open it.
    A paid invoice opens as a Tax Invoice; an unpaid one opens as a Proforma Invoice with the option to pay online.
  4. Download or print.
    On a paid invoice, click Download Tax Invoice to save the PDF. On an unpaid invoice, Download PDF saves the proforma. Print works on both.
Billing, Invoices list: Total, Paid, Pending, Overdue tiles; paid INV- rows with a Ref: PI- number, unpaid PI- rows labelled Proforma with Pay
Billing › Invoices: unpaid Proforma PI- rows and paid INV- rows

7. Get your GSTIN on the tax invoice

Add your GSTIN before you pay

The tax invoice is created when the payment goes through, using the details on your account at that moment. Add your GSTIN and check your billing state before paying a new order or a renewal.

Add your 15-character GSTIN in the GST information card on your Profile, or under billing settings, where the billing address also lives. The full walkthrough is in Adding GSTIN to Your Account.

If a tax invoice has already been issued without your GSTIN, or with the wrong state, open a ticket with the tax invoice number. Don't assume it can be changed.

8. When something doesn't look right

  • You paid, but the invoice still shows Payment Due. Most payments confirm within about two minutes. Don't pay again. If it hasn't changed after you have been charged, open a ticket with the invoice number and your payment reference.
  • A paid invoice has no Download Tax Invoice button. Open a ticket with the invoice number and we will check it.
  • The amount is higher than the plan price. Website prices exclude GST; 18% is added on the invoice. Also check the billing period: a yearly invoice covers the whole year.
  • You need a correction. Open a ticket with the tax invoice number and exactly what needs to change.

Tickets go through /client/support/new when you are logged in, or /support/ticket. Live chat is available 24/7, and tickets get a first response within 15 minutes.

What is the difference between a PI- and an INV- invoice at Domain India?

A PI- number is a proforma invoice: a request for payment created for a new order, renewal or upgrade. When you pay, the same invoice gets an INV- number, and the PI- number is kept as a reference. A GST tax invoice with a TAX- number is issued at the same time.

Can I claim input tax credit with a proforma invoice?

No. A proforma invoice is not a tax document. Use the tax invoice issued after payment, downloaded with the Download Tax Invoice button. Ask your CA whether your purchase qualifies for input tax credit.

What does the TAX- number on my invoice mean?

It is the number of the GST tax invoice. It includes the Indian financial year, which runs from April to March, so TAX-2026-27 means a tax invoice from the 2026-27 financial year.

Which invoice should I give my accountant?

The tax invoice. It carries Domain India's GSTIN, your GSTIN if it was on your account, the place of supply, SAC code 998315 and the GST breakup.

I don't have a GSTIN. Do I still get a tax invoice?

Yes. Every paid invoice gets a tax invoice. If you are not GST-registered, leave the GSTIN field on your profile blank.

I paid but the invoice still says Unpaid. What should I do?

Don't pay a second time. Some payments take a little time to confirm. If the status has not changed after you have been charged, open a support ticket with the invoice number and your payment reference.

Does Domain India charge my card automatically for renewals?

No. Domain India never charges a saved card automatically. A renewal invoice is generated up to 30 days before the due date, and the service renews only when you pay it.

Ready to check your invoices? Open Invoices in the client area, add your GSTIN on your Profile before your next payment, or read How to Pay an Invoice via Razorpay.

See your invoices

Pay proforma invoices online and download your GST tax invoices from one place.

Open Invoices

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PI, INV and TAX Invoice Numbers Explained | Domain India