TAN Number: What It Is and How to Verify One

TAN identifies a business or entity in its role as a tax deductor or collector, a narrower and different purpose than PAN’s general tax identity or CIN’s proof of incorporation. The next section breaks down exactly how the three differ and where each fits.

These three identifiers get confused because they’re all alphanumeric codes issued by government authorities to businesses, but each identifies something different.

TAN’s fourth letter represents the initial of the deductor’s name, and the first three letters denote the issuing/jurisdiction location, with a final check letter closing out the code. PAN’s structure works differently. The fourth letter denotes the holder’s category (“P” for individual, “C” for company, “H” for HUF, “F” for firm), and the fifth letter is the first letter of the holder’s surname or entity name.

A business can hold a TAN, a PAN, and a CIN at the same time, each issued by a different authority for a different purpose: TAN identifies it as a TDS/TCS deductor with the tax department, PAN is its general tax-identification number, and CIN is the MCA’s proof of incorporation. Having one doesn’t substitute for the others.

For a full walkthrough of the third identifier referenced throughout this piece, see KYCKART’s companion explainer: CIN Number: What It Is and How to Verify One.

TAN is required by any person or entity responsible for deducting tax at source (TDS) or collecting tax at source (TCS). This covers employers, businesses making specified payments, and other deductors, not individuals filing their own returns.

Section 203A of the Income Tax Act, 1961 requires every person liable to deduct or collect tax at source to obtain a TAN and quote it on TDS/TCS returns, payment challans, and certificates.

One exception: persons deducting tax under Section 194-IA (TDS on the sale consideration of land or building) are not required to obtain a TAN for that specific transaction.

Applying is done using Form No. 49B, submittable online through the Protean/TIN portal or at a TIN Facilitation Centre (TIN-FC). The processing fee is ₹65 plus 18% GST, totaling ₹77, and it’s non-refundable even if the application is rejected.

Failure to apply for TAN, or failure to quote it correctly on specified documents, attracts a ₹10,000 penalty under Section 272BB(1) of the Income Tax Act, with a corresponding penalty under 272BB(1A) for quoting an incorrect TAN.

The Income Tax e-filing portal’s “Know TAN Details” service is accessible pre-login, to both registered and unregistered users, directly from the portal homepage, and lets anyone look up TAN information for a given deductor. The exact fields the lookup asks for, and exactly what the result screen returns beyond “TAN information” generally, were not independently confirmed, so this describes the access point rather than a field-by-field walkthrough.

The portal frames this lookup as good practice: verifying the TAN of any entity that deducts tax on your behalf, commonly cross-referenced against Form 16, Form 16A, or Form 26AS to confirm the deduction was made by the correct, valid entity.

Separately, Protean’s TIN portal handles new TAN applications, corrections to existing TAN data, and application-status tracking, a different function from the Income Tax portal’s lookup, which is for checking an already-issued TAN rather than applying for one.

Reading TAN, PAN, and CIN together

Looking at the three identifiers side by side, the pattern is that each one answers a different question a lender or counterparty might ask about a business, rather than one identifier being a more complete version of another. TAN answers “is this entity registered to deduct tax at source,” PAN answers “what is this entity’s general tax identity,” and CIN answers “is this company legally incorporated.” Because TAN is scoped specifically to the TDS/TCS-deductor role and not to personal filing, a business can be fully PAN- and CIN-compliant and still lack a valid TAN if it has never taken on a deducting role. That’s why checking a counterparty’s TAN specifically matters when the relationship involves them deducting tax on your behalf, rather than assuming PAN or CIN verification already covers it.

This also implies a practical sequencing point for onboarding. Because a deductor’s TAN is meant to be cross-checked against the entity actually deducting tax on your behalf, getting that verification wrong, or skipping it, means trusting a document without confirming who issued it. Read alongside the fact that a business can hold a TAN, a PAN, and a CIN at once, each from a different authority for a different purpose, with none substituting for the others, the practical implication for onboarding a vendor or borrower is that a TAN check needs to happen as its own step, not as a stand-in for a PAN or CIN check. For related identifiers, see KYCKART’s KYC verification pillar cluster and the CIN Number explainer.