⏱ 9 min read

Business owners occasionally want to look into the purchase-side GST activity tied to another company’s GST number — usually to check whether a vendor is genuine, whether a supplier is actively filing returns, or whether a business partner’s compliance status matches what they claim. The phrase “purchase data of another company” gets searched a lot, but it hides an important distinction: there is a wide gap between what is publicly verifiable about a GST number and what is private financial detail that no outside party can legally pull up.

This guide walks through exactly what is and isn’t accessible when you’re trying to look into another company’s GST activity through its GST number, the legitimate methods available, and where people commonly get confused between “verification” and “data access.”

1. Why People Search for This

Most requests for another company’s purchase data fall into a handful of recurring situations.

Vendor Due Diligence

Before onboarding a new supplier, a business wants reassurance that the vendor is real, registered, and actively compliant — not a shell entity that will disappear after the first invoice.

Partner or Investor Checks

Anyone considering a partnership, joint venture, or investment wants a sanity check on the other party’s registration status and filing consistency before committing.

Dispute or Audit Situations

When an invoice or transaction is disputed, one party may want to confirm the counterparty’s GST number was valid and active at the time of the transaction.

2. What Is Actually Public

The public-facing GST search tools are built for verification, not for pulling detailed transaction data.

Registration Status

Anyone can check whether a GST number is active, cancelled, or suspended, along with the legal name and registration date tied to it.

Filing Frequency and Recency

Public search tools typically show whether recent returns have been filed on time, which is a useful proxy for how consistently a business meets its obligations.

Business Type and Jurisdiction

The state of registration, business constitution (proprietorship, partnership, company, etc.), and the jurisdictional office handling the registration are all visible.

3. What Is Not Public

This is where most confusion happens — detailed purchase and sales figures are not something an outside party can look up for someone else’s GST number.

Actual Purchase and Sales Values

The rupee value of what a business has purchased or sold in any given period is confidential financial information, not a public record.

Vendor and Customer Lists

Who a company buys from or sells to is commercial information that stays private to that business and its own filings.

Return-Level Line Items

The itemized contents of a company’s own GST returns are visible only to that business through its own portal login, not to third parties searching by number.

4. Legitimate Ways to Verify a Counterparty

None of the following require or provide someone else’s private purchase data — they confirm status, not financials.

Official Portal Search

Entering a GST number into the official search tool confirms it exists, is active, and matches the name the counterparty gave you.

Requesting Filing Proof Directly

Asking a vendor or partner to share a recent filing acknowledgment or return summary is a normal, reasonable request in most commercial relationships.

Cross-Checking Invoice Details

Comparing the GST number, legal name, and address printed on an invoice against what the public search shows is a quick way to catch mismatches.

5. Why Purchase-Level Privacy Exists

The line between public status and private financials isn’t arbitrary — it protects competitive and commercial interests.

Protecting Commercial Confidentiality

If anyone could look up a competitor’s purchase volumes and supplier list, it would expose pricing leverage and sourcing strategy that businesses reasonably keep private.

Preventing Misuse

Open access to another entity’s transaction-level data would create obvious risks for fraud, targeted solicitation, and competitive sabotage.

6. What to Do When Verification Isn’t Enough

Sometimes a simple status check doesn’t resolve the underlying concern, and that calls for a different approach.

Ask for Documentation

A legitimate business will usually not hesitate to share recent filing proof, especially in a B2B relationship where trust needs to be established both ways.

Use Escrow or Staged Payment Terms

When registration status alone isn’t reassuring enough for a large transaction, structuring payment terms to reduce risk is often more practical than trying to dig up data that isn’t accessible.

Consult the GST Helpdesk for Procedural Questions

For questions about what a specific status message means or how to interpret a filing gap, the official helpdesk is the right first stop before assuming the worst.

7. Common Misunderstandings

A few recurring misconceptions come up around this topic.

“If I Have Their GST Number, I Can See Everything”

A GST number unlocks status information, not financial history — it functions more like a registration ID than a login credential.

“Purchase Data and Sales Data Are the Same Thing”

Purchase data reflects what a business buys; sales data reflects what it sells. Both are private, but they answer different questions and are recorded separately in a business’s own filings.

“Third-Party Tools Can Unlock Private Data”

Any tool claiming to reveal another company’s confidential transaction data through its GST number alone should be treated with skepticism — legitimate compliance data does not work that way.

8. Frequently Asked Questions

Can I see how much another company purchased last year using just their GST number?

No. Purchase values are private financial data tied to that business’s own filings and are not exposed through public GST search tools.

Is there a legal way to request a vendor’s purchase history?

You can ask the vendor directly to share relevant documentation as part of a business relationship, but there is no public database that discloses this on your behalf.

Why does the public search only show filing status and not amounts?

The public tool is designed for verification — confirming a business is registered and compliant — not for disclosing commercial financial detail.

Does a cancelled GST number mean the business is fraudulent?

Not necessarily. Cancellation can happen for several administrative reasons; it’s worth confirming details directly with the business rather than assuming the worst.

Can auditors or tax authorities access more than the public data?

Authorized bodies can access detailed records through official channels as part of formal processes, but this is not the same as public access available to any searcher.

Quick Recap

Looking up “another company’s purchase data” through a GST number will only ever surface registration and filing status — not financial detail. That’s by design: status information supports verification, while purchase and sales figures remain private to protect commercial confidentiality.

If your goal is genuinely to vet a vendor or partner, combine an official status check with a direct request for documentation rather than searching for tools that promise more than the system is built to reveal.

To understand exactly what official checks are meant to confirm and how to run them properly, see our guide to GST verification requirements.