TDS, TCS, Advance Tax, Returns and Tax Computation

Weightage: Chapters 7 through 9 of ICAI's Paper 3 Section A, together roughly 8 marks. The final stretch of the computation skeleton, and where the whole of Section A's arithmetic converges into a single tax liability figure.

Why tax is collected before the year even ends

Waiting until an assessment year to collect an entire year's tax on income already spent, invested or moved abroad creates a serious collection risk and a serious cash-flow mismatch for the government. The Act therefore builds pay-as-you-earn into the system through two complementary mechanisms: TDS/TCS, which collects tax at the point a specific payment is made, and advance tax, which requires a taxpayer with any liability above a threshold to estimate and pay tax in instalments through the year itself, rather than as one lump sum after the year ends.

Tax Deducted at Source (TDS)

The mechanism

A person making specified payments — salary, interest, rent, professional fees, commission, contractual payments, and others — is obliged to deduct tax at the prescribed rate before making the payment, and to deposit the deducted amount with the government within the prescribed time. The deductee gets credit for the tax so deducted against their final liability, evidenced by Form 26AS and the TDS certificate issued by the deductor.

Rates and thresholds for the commonly examined sections

Section 192 — Salary. TDS is deducted at the average rate of tax applicable to the employee's estimated total income for the year, computed on the regime the employee has opted for, with no separate flat rate.

Section 193 — Interest on securities, section 194 — Dividend, and section 194A — Interest other than on securities (bank deposits, for instance): deducted at 10%, subject to specified threshold exemptions below which no deduction is required.

Section 194C — Payments to contractors: 1% where the payee is an individual or HUF, 2% for other payees, subject to threshold limits per payment and per year.

Section 194H — Commission or brokerage: 5% (subject to threshold).

Section 194I — Rent: 2% for plant, machinery or equipment; 10% for land, building, furniture or fittings; subject to an annual threshold.

Section 194J — Fees for professional or technical services: 10% for professional services and certain royalty/non-compete payments; 2% for technical services and for a payee engaged solely in the business of operation of a call centre, subject to threshold limits.

Section 194-IA — Transfer of certain immovable property (other than agricultural land): 1% of the consideration, where the consideration exceeds a prescribed threshold, deducted by the transferee (buyer), not the seller — a point candidates get backwards, since in every other TDS section it is the payer generally, but here it is specifically the buyer of the property who must deduct and deposit, quite apart from any professional relationship.

Section 194N — Cash withdrawal from a bank/post office account exceeding specified annual thresholds, at rates that step up for a person who has not filed returns for specified prior years — a deliberate compliance-enforcement mechanism rather than an ordinary income-collection provision.

Consequences of default

Interest is payable for failure to deduct and for failure to deposit deducted tax, at differentiated rates and periods — a higher effective cost attaches to deducting but not depositing than to a straightforward computational default, since the deductor has in that case actually withheld the payee's money and not passed it on.

Disallowance of the corresponding business expenditure under section 40(a), covered in the Business/Profession chapter (30% for a resident payee, 100% for a non-resident payee), operates alongside these interest consequences, not instead of them.

Penalty may additionally be levied for failure to deduct, in addition to the interest and disallowance consequences.

Tax Collected at Source (TCS)

The mirror mechanism

Where TDS collects tax on specified payments, TCS collects tax on specified receipts by a seller from a buyer, on transactions including the sale of specified goods (scrap, certain minerals, timber and similar categories), and on remittances under the Liberalised Remittance Scheme and on overseas tour packages, at rates and thresholds specific to each category. The collected amount is likewise deposited with the government, and the buyer gets credit against their own final liability, exactly mirroring the credit mechanism for TDS.

Advance Tax

Who must pay it

Every assessee whose estimated tax liability for the year is ₹10,000 or more, after adjusting for TDS/TCS credit, must pay advance tax. A resident senior citizen not having any income from business or profession is specifically exempted from the obligation to pay advance tax.

The instalment schedule for other than section 44AD/44ADA assessees

• On or before 15 June: 15% of the advance tax liability.
• On or before 15 September: 45% of the advance tax liability (cumulative).
• On or before 15 December: 75% of the advance tax liability (cumulative).
• On or before 15 March: 100% of the advance tax liability (cumulative).

The single-instalment schedule for section 44AD/44ADA assessees

An assessee declaring income under the presumptive schemes (44AD or 44ADA) may pay the entire amount of advance tax in a single instalment on or before 15 March of the financial year, rather than following the four-instalment schedule.

Interest for default — sections 234B and 234C

Section 234B — interest for default in payment of advance tax, where advance tax paid is less than 90% of the assessed tax, computed at 1% per month (or part of a month) from 1 April of the assessment year until the date of determination or payment, on the shortfall.

Section 234C — interest for deferment of instalments, computed for shortfalls at each individual instalment date against the cumulative percentage due at that date, at 1% per month for periods specific to each instalment (three months for the June, September and December shortfalls; one month for the March shortfall) — this penalises paying late even where the taxpayer eventually reaches 90% or 100% by the final instalment, because the schedule requires payment to track the cumulative percentages at each date, not merely by the year end.

Return filing and self-assessment

Due dates under section 139(1)

31 July of the assessment year, for assessees not requiring audit (individuals, HUFs and others not covered below).

31 October of the assessment year, for a company, and for any other assessee whose accounts are required to be audited under this Act or any other law, and for a partner of a firm whose accounts require audit.

30 November of the assessment year, for an assessee required to furnish a report under section 92E in respect of international or specified domestic transactions (transfer pricing cases).

Belated and revised returns

A belated return may be filed under section 139(4) at any time up to three months before the end of the relevant assessment year, or before completion of assessment, whichever is earlier, but attracts late filing fees under section 234F and forfeits certain reliefs (such as carry-forward of business loss, as noted in the previous chapter).

A revised return may be filed under section 139(5) at any time up to three months before the end of the relevant assessment year, or before completion of assessment, whichever is earlier, to correct any omission or wrong statement in the original return — and this facility is available whether the original return was filed within the due date or was itself a belated return, a point candidates sometimes assume is restricted to returns filed on time.

Self-assessment tax

Before filing the return, the assessee must compute the tax payable on the basis of the return, after taking credit for TDS, TCS, advance tax paid and any relief claimed, and pay the balance, together with applicable interest, as self-assessment tax — a return filed without discharging this liability is treated as defective.

Computation of tax liability — bringing it together

The two-regime structure

Individuals and HUFs (and certain other assessees) compute tax under one of two rate structures: the default new regime under section 115BAC, with its own slab rates and a restricted set of deductions/exemptions available, applicable unless the assessee opts out; or the old regime, with its own (generally higher-rate but more deduction-friendly) slabs, available on exercise of an option in the prescribed manner and time.

For a business or professional income assessee opting out of the new regime, the option, once exercised, generally carries restrictions on switching back in later years, whereas an assessee without business or professional income may choose between the regimes every year.

Rebate under section 87A

Available to a resident individual whose total income does not exceed a specified threshold, as a rebate against tax payable (not against income), computed as the lower of the tax payable and a specified statutory ceiling, effectively making tax liability nil for income up to the threshold, subject to the specific threshold and ceiling figures differing between the old and new regime.

Surcharge

Applicable where total income exceeds specified thresholds, at graduated percentages that increase as income rises through successive higher thresholds, subject to a marginal relief provision ensuring that the incremental tax plus surcharge on income just above a threshold never exceeds the incremental income itself by more than the excess over the threshold — this prevents a taxpayer crossing a surcharge threshold by a small amount from ending up with less post-tax income than someone just below it.

Health and Education Cess

A flat 4% is levied on the aggregate of income tax and surcharge, computed as the final step before arriving at total tax liability, and is not itself eligible for any rebate or relief.

The final sequence

\text{Tax on Total Income (slab rates)} \rightarrow \text{less: Rebate u/s 87A} \rightarrow \text{plus: Surcharge (if applicable, with marginal relief)} \rightarrow \text{plus: Health and Education Cess @ 4%} \rightarrow \text{Total Tax Liability} \rightarrow \text{less: TDS/TCS/Advance Tax paid} \rightarrow \text{Net Tax Payable or Refund}

Reproducing this sequence, in this order, with each stage labelled, is what earns the marks for the final stage of every full computation in Section A — exactly as the method chapter for this paper describes for the eight-stage skeleton as a whole.