As a proprietor, should I apply for a new PAN in my business's name?

No — and you cannot. A proprietorship is not a separate legal person, so the Income Tax Department will not issue it a distinct PAN. You use your own personal PAN for every business purpose: GST registration, current account opening, Udyam registration, and tax filing (business income is reported in your personal ITR, typically under the presumptive taxation sections if eligible). Applying for a second PAN under any name, including a business name, is both impossible for a proprietorship and, if attempted through misrepresentation, a punishable offence under the Income Tax Act — holding more than one PAN is illegal for any person.

Do I need a TAN if I only pay salaries below the taxable threshold?

TAN is required the moment you are obligated to deduct tax at source on any payment — salary, professional fees, rent above the specified threshold, or contractor payments — not just salaries above the taxable slab. If none of your payments currently cross any TDS threshold, you do not need a TAN yet. But most businesses that hire even a couple of employees or pay a consultant a meaningful invoice will cross some TDS trigger eventually, so it is common to apply for a TAN proactively once you know you will need it, rather than scrambling when a payment is already due.

Can two different businesses I own have the same GSTIN?

Only if they operate in the same state and share the same PAN and legal structure — in that case, they can be registered under a single GSTIN with multiple 'additional places of business' declared. If your two businesses are legally separate entities (say, a proprietorship and a private limited company), they have different PANs and therefore automatically get different GSTINs, even if you personally control both. If the same PAN operates in two different states, each state registration gets its own distinct GSTIN, because the first two digits (state code) differ.

Business PAN, Personal PAN, TAN and GSTIN Explained

PAN, TAN, and GSTIN look similar — strings of letters and numbers issued by tax authorities — 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 article 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 ten-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. In the eyes of the law, "Ramesh's Rice Traders" and "Ramesh" are the same taxpayer. There is no PAN for the business — Ramesh 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.

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 ten-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 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.

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:

Position	What it represents
1-2	State code, per the Indian Census 2011 numbering (e.g., 27 = Maharashtra, 07 = Delhi, 29 = Karnataka)
3-12	Your PAN, exactly as issued by the Income Tax Department
13	Entity code — the sequence number of this registration for the same PAN within the same state (a single PAN can hold multiple registrations in one state, for separate business verticals, numbered 1 through 9 then A through Z)
14	A default character, currently always "Z"
15	A checksum character, calculated to let systems verify the GSTIN is well-formed

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.

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.

How the three connect, structure by structure

Structure	PAN	TAN	GSTIN
Sole proprietorship	Proprietor's personal PAN, used for the business	Separate, business-specific TAN if TDS applies	Built from the proprietor's personal PAN
Partnership firm	Firm's own PAN	Firm's own TAN if TDS applies	Built from the firm's PAN
LLP	LLP's own PAN	LLP's own TAN if TDS applies	Built from the LLP's PAN
Private limited company	Company's own PAN (issued at incorporation)	Company's own TAN if TDS applies	Built from the company's PAN

Common mistakes

A proprietor trying to "separate" business and personal PAN. It cannot be done — there is only one PAN, and using it for both is correct, not a compliance gap. What should be separated is the bank account and bookkeeping, not the PAN.
Assuming TAN is needed only for companies. Any structure, including a proprietorship, needs a TAN the moment it is obligated to deduct TDS on any payment — this has nothing to do with legal structure and everything to do with whether you make TDS-triggering payments.
Applying for GST registration with an outdated or mismatched PAN name. The name on your GST application must match your PAN records exactly (including for a proprietorship, where it must match your personal PAN name), or the application gets flagged for verification and delayed.
Assuming one PAN means one GSTIN. If you operate in multiple states, or run multiple registered verticals within one state, one PAN can sit behind several GSTINs simultaneously.

What to do next

Confirm which PAN applies to your situation: your own, if a proprietor, or your entity's, if a partnership/LLP/company.
Check whether any payment you currently make — salary, contractor fees, rent — crosses a TDS threshold. If yes, apply for a TAN before the next payment is due, not after.
Read your own GSTIN character by character using the table above, and confirm the embedded PAN and state code are correct.
If you plan to register in a second state, expect a second, distinct GSTIN — not an extension of your existing one.
Keep PAN, TAN, and GSTIN details consistent across every registration and bank record — a mismatch anywhere is the single most common cause of a rejected or delayed government application.