TDS and advance tax

The government does not wait until the end of the year to collect. Two mechanisms do the collecting, and both are frequently misunderstood in ways that cost money.

Rates and thresholds are not stated here. They change with each Finance Act, and the Department's own site is the authority.

Tax deducted at source

Somebody paying you deducts tax before paying and remits it to the government on your behalf. It applies to salary, interest, dividends, professional fees, rent above thresholds, and a long list of other payments.

Three facts about it, and each one is routinely got wrong.

It is an advance, not a settlement. TDS is credited against your liability; it does not define it.

If your rate is higher, you owe more. TDS is deducted at a prescribed rate, which may be below your marginal rate. The balance is due when you file, and people who treat TDS as "tax already handled" get a demand later.

If you owe less, it is refundable. This is the one that quietly costs people money. Somebody whose total income is below the taxable threshold may still have TDS deducted on their interest — and that money comes back only if a return is filed. There are also declaration forms that prevent the deduction in the first place for those eligible.

Money deducted and never reclaimed is a real, common and entirely avoidable loss, and it falls hardest on people with modest incomes and deposit interest.

Advance tax

Where TDS does not cover your liability, you are expected to pay as the year goes rather than at the end — in instalments, on prescribed dates, if your liability exceeds a threshold.

Who it catches:

The self-employed, who have no employer deducting from a salary.

Anyone with significant income outside salary — capital gains, substantial interest, rental income, freelance work.

Anyone whose TDS falls short of their actual liability.

Underpaying attracts interest. That interest is a straightforward, avoidable cost, and it is incurred by people who had the money and did not know the obligation existed.

The case that catches investors specifically: a large capital gain. Realise a substantial gain and you may have an advance tax instalment due that quarter, with nobody deducting anything at source. Chapter 4's control over timing comes with this attached — choosing when to sell also chooses when a payment falls due.

Your annual tax statement

The single most useful document in this chapter.

The Department consolidates what has been reported against your PAN — TDS deducted, taxes paid, and significant transactions reported by banks, registrars and others.

Two habits:

Check it before filing. Credit you claim should match what is reported. A mismatch — a deductor who deducted and did not report correctly — is far easier to resolve before a return is filed than after.

Check it even if you do not expect to file. It shows TDS you may not have known was deducted, which is the refund case above.

The information flow has changed

Worth stating plainly because it changes the calculus.

Banks, mutual fund registrars, depositories, registrars of property and others report transactions against your PAN. Interest credited, mutual fund redemptions, large deposits, property transactions.

So the Department's view of your financial year is assembled independently of what you report. "They will not know" is not a factual description of the system, and the practical consequence is simply that reporting accurately is easier than the alternative.

What the 2025 Act changed

Not the mechanisms. TDS and advance tax survive the rewrite, because chapter 1's point holds: the new Act restructured the law without imposing new taxes.

What changed is the surface — forms reduced from 399 to 190 — and the section numbers everyone quotes. Chapter 1's caution applies: guidance citing a 1961 Act section is describing a repealed provision, even where the mechanism it describes is unchanged.

The point

TDS and advance tax collect through the year and neither settles what you owe. TDS below your marginal rate leaves a balance due; TDS above your liability is refundable but only through a filed return. A large capital gain can trigger an advance tax instalment with nothing deducted at source — and your annual tax statement is the document that reconciles all of it.