Finance & Business Finance

GST Invoice Checker

Review the presence of key Indian GST invoice fields and the structural shape of a seller GSTIN.

01Private browser calculation
02Assumptions stay visible
03CSV and print ready

01 / Scenario

Build the working scenario

Use the actual invoice draft, verify rates and place-of-supply treatment independently, and enter each field exactly.

Seller GSTINEnter the 15-character seller GSTIN for a structural format check only.Invoice numberInvoice reference whose presence will be checked.Invoice dateDate shown on the invoice.Place of supplyState or place-of-supply wording shown on the invoice.HSN or SACGoods or services classification code shown on the invoice.Taxable valueAmount before GST used by the invoice draft.GST rateUser-selected GST percentage; this page does not determine the correct rate.%GST tax modeChoose the tax presentation you intend to verify against place-of-supply rules.

Confirming this published tool with the catalogue...

Transparent method

How this calculation works

The checker tests field presence and a basic 15-character GSTIN pattern, then reports the selected tax mode and rate without validating them.

Before you start

What you need

Seller GSTIN, invoice number and date, place of supply, HSN/SAC, taxable value, GST rate, and tax mode.

Useful output

What you receive

A field checklist, basic GSTIN structure result, selected rate and mode, assumptions, and CSV.

Decision guardrail

What this does not decide

This is not GST portal validation, return matching, e-invoice validation, tax calculation, or a legal compliance opinion.

Practical uses

Where this tool helps

Review a draft tax invoice.
Catch missing invoice fields.
Prepare questions for an accountant.

Data boundary

Financial inputs remain local

Calculations and report generation run in your browser. Nirmion does not upload, retain, or recover the values entered here. The public catalogue request contains only the tool slug.