Business PAN, Personal PAN, TAN and GSTIN: The Numbers I Keep Straight

A business carries its identity in a handful of numbers that turn up on almost every document: the PAN behind its tax returns, the GSTIN on every invoice, and, for any business that deducts tax at source, a TAN. At our family's rice mill these numbers go out on nearly every paper we send, whether it is for the books, the tax work or the bank, so checking them before anything leaves stays my job. A wrong character in any of them travels further than people expect.

PAN, TAN, and GSTIN look similar, and business owners often assume they are variations of the same thing, or that a new business automatically needs a new one of each. They are not variations of each other. They serve three distinct functions, apply differently depending on your business structure, and one of them is literally embedded inside another. This guide untangles all three, plus the specific "business PAN vs personal PAN" question that trips up nearly every new proprietor.

PAN: Your Tax Identity, Personal or Entity

A Permanent Account Number is a 10-character alphanumeric identifier issued by the Income Tax Department. It identifies who is being taxed: an individual, or a distinct legal entity.

The proprietorship rule that surprises people: a sole proprietorship has no legal existence separate from its owner. Say a paddy trader runs a proprietorship under a shop name. In the eyes of the law, the shop name and the trader are the same taxpayer. There is no PAN for the business: the trader uses his own personal PAN for the GST registration, the current account, the Udyam registration, and his income tax return, where the business's profit is simply his personal income (typically computed under presumptive taxation if he is eligible, or under regular business-income provisions otherwise).

Who does get a separate, entity-level PAN:

• Partnership firms: the firm itself gets a PAN, distinct from each partner's personal PAN.
• LLPs: the LLP is a distinct legal person and gets its own PAN.
• Private and public limited companies: the company is a distinct legal person and gets its own PAN, issued as part of the incorporation process through the SPICe+ form with the Ministry of Corporate Affairs.
• HUFs, trusts, AOPs/BOIs: each gets its own PAN as a distinct assessable entity.

So "business PAN" is a meaningful, correct phrase for a partnership, LLP, or company, and a slightly misleading one for a proprietorship, where the only PAN in the picture is the proprietor's personal one, simply used for business purposes. How the choice of structure plays out beyond tax numbers is covered in private limited vs LLP vs proprietorship.

TAN: A Completely Different Number, for a Completely Different Job

A Tax Deduction and Collection Account Number is not a variant of PAN: it is a separate 10-character number that identifies you specifically as an entity that deducts tax at source on payments you make to others. You need a TAN if you are obligated to deduct TDS on:

• Salaries paid to employees above the applicable exemption.
• Professional or technical fees paid to consultants or contractors above the threshold.
• Rent paid above the specified threshold.
• Contract payments to vendors above the specified threshold.

A business can have a valid PAN and no TAN at all, if it has never crossed a TDS trigger: a solo freelancer with no employees and no large contractor payments, for example. The moment any payment crosses a TDS threshold, a TAN usually becomes mandatory, and every TDS return you file (and every TDS certificate, Form 16 or 16A, you issue to the person you deducted from) is filed against that TAN, not your PAN. Which payments trigger a deduction, and how the monthly cycle runs, is set out in TDS vs TCS for small business.

A proprietor uses their own PAN as the taxpayer, but applies for a business-specific TAN as the deductor. These are not the same number, even though the same person is behind both.

GSTIN: Your PAN, Wearing a State-Specific Wrapper

A GST Identification Number is a 15-character code, and unlike PAN and TAN, it is not an independent number: it is built directly from your PAN. Reading a GSTIN character by character:

This structure has a direct practical consequence: your GSTIN cannot exist before your PAN does, and if your PAN is wrong, incomplete, or belongs to the wrong entity, your GST application will be rejected or generate a GSTIN with an error baked into it. It also means anyone can verify which PAN sits behind a GSTIN just by reading positions 3 to 12; there is no way to register for GST anonymously or under a different identity than your PAN represents. The papers a proprietor needs for that application are listed in GST registration documents for a proprietorship.

If you operate in more than one state, you get a separate GSTIN for each state: same PAN, different first-two-digit state code, different registration.

A GSTIN Does Not Pass Down With the Business

For a family business that began with a parent, as ours did, this is the point I would make first. Because a GSTIN is built from a PAN, it belongs to that PAN and cannot be handed on. If a proprietorship passes from one person to another, whether by succession or by transfer as a going concern, the new owner needs a registration of his own: Section 22(3) of the CGST Act makes the transferee or successor liable to register from the date of the transfer or succession.

The same logic runs through the current account, the licences and the other registrations that carry the old proprietor's PAN. Succession in a family business is usually discussed as a question of who controls it. The paperwork deserves as much thought, and well before it is needed. An LLP or company has its own PAN, which does not change when its owners do; that is one of the structural differences worth weighing if continuity matters to you.

How the Three Connect, Structure by Structure