TDS Basics for Businesses: How Tax Deducted at Source Really Works

What TDS actually is (and why it exists)

Tax Deducted at Source (TDS) flips the usual tax logic. Instead of waiting for the receiver of income to pay tax at year-end, the law asks the payer to withhold a slice of the payment and deposit it with the government right away. You, the business making the payment, become a deductor; your vendor, employee or landlord becomes the deductee.

Think of it as tax collected in instalments, at the moment income is born. The deductee doesn't lose that money — it sits against their PAN in Form 26AS/AIS and gets adjusted against their final tax liability when they file their income-tax return.

A quick worked example: you pay a consultant a professional fee of ₹50,000. Professional fees fall under the Section 194J family. If the applicable rate were 10% (always verify the current rate chart on incometax.gov.in), you would pay the consultant ₹45,000, deposit ₹5,000 with the government against the consultant's PAN, and report it in your quarterly TDS return. The consultant later claims that ₹5,000 as tax already paid.

Step zero: get a TAN

Before you can deduct a single rupee, you need a TAN — Tax Deduction and Collection Account Number. It is a 10-character alphanumeric ID (like MUMA12345B), separate from your PAN and your GSTIN. You apply through the NSDL/Protean portal using Form 49B, and it typically arrives within days.

Why a separate number? Because everything in the TDS ecosystem — challans, quarterly returns, certificates — is tracked against the TAN, not your PAN. Quoting a wrong or missing TAN is one of the most common (and most avoidable) compliance slip-ups.

The four-step TDS cycle

Every TDS obligation follows the same rhythm, quarter after quarter:

1. Deduct — withhold tax when you credit or pay the amount (whichever is earlier, for most business payments).
2. Deposit — pay the deducted amount to the government through a challan (ITNS 281), generally by the 7th of the following month (year-end months can differ — confirm current due dates).
3. File — submit a quarterly TDS statement (24Q for salaries, 26Q for most resident non-salary payments) listing every deductee, PAN, amount and challan.
4. Certify — issue TDS certificates: Form 16 to employees (annually) and Form 16A to other deductees (quarterly), generated from the TRACES portal.

Miss any step and the chain breaks: the deductee's 26AS won't show the credit, they will chase you for certificates, and interest or late fees can start ticking on your side. We cover the filing leg in detail in our TDS return filing guide.

The section families you will actually meet

The Income-tax Act has dozens of TDS sections, but a typical small business meets only a handful. Rates and threshold amounts change from time to time, so treat the table below as a map of which section covers what, and check the live rate chart before deducting.

Two structural points worth internalising:

• Salary TDS (192) is different in kind. It is computed on the employee's estimated annual income at slab rates, not a flat percentage. Our separate post on TDS on salary under Section 192 walks through the maths.
• No PAN = higher rate. If a deductee cannot furnish a valid PAN, the law forces deduction at a punitive higher rate. Always collect PANs before the first payment, not after.

Worked example: one month in the life of a deductor

Say your firm, in July, makes these payments:

• Office rent to landlord: ₹60,000 → Section 194I family. At an illustrative 10% rate, deduct ₹6,000, pay landlord ₹54,000.
• Website developer's professional fee: ₹50,000 → Section 194J. At an illustrative 10%, deduct ₹5,000, pay ₹45,000.
• Printing contractor's bill: ₹40,000 → Section 194C. At an illustrative 1–2% (rate differs for individuals vs companies), deduct say ₹800, pay ₹39,200.

By the 7th of August you deposit ₹11,800 via challan ITNS 281. In the July–September quarterly return (26Q) you report all three deductees with their PANs. After processing, you download Form 16A from TRACES and send one to each deductee. That is the entire loop.

In your books, each deduction creates a liability entry (TDS payable) that clears when the challan is paid — see our tutorial on TDS journal entries for the exact debits and credits.

Thresholds, timing and the "credit or payment" rule

Most non-salary sections only bite once the payment crosses a per-transaction or annual threshold — small payments stay out of the net. The thresholds are revised periodically, so verify current figures rather than relying on remembered numbers.

Timing trips people up more than rates do. For most business payments, TDS is triggered on credit to the party's account or actual payment, whichever is earlier. Booking a provision entry on 31 March for a consultant's unbilled work? That credit itself triggers TDS, even though no cash moved.

What happens if you slip

The consequences are layered rather than dramatic, but they compound:

• Interest for deducting late or depositing late (charged monthly, with different rates for the two failures).
• Late filing fee per day for delayed quarterly statements, plus possible penalties.
• Expense disallowance — a portion of the expense on which TDS wasn't deducted can be disallowed while computing your business income, which raises your own tax bill.

The cheapest compliance strategy is boring consistency: deduct at the time of booking the bill, deposit by the 7th, file every quarter, issue certificates promptly.

Let software carry the calendar

None of this is intellectually hard — it is a memory game, and memory games are what software wins. iAccounting's AI accountant recognises TDS-attracting expenses as you record them, posts the payable entries automatically, and keeps a running list of what is due by the 7th. Read more in our TDS & TCS tutorial or browse the income-tax guides to go deeper.