What Is Advance Tax, and Who Needs to Pay It?

Advance tax is income tax paid in instalments during the financial year itself, as you earn, rather than as one lump sum after the year ends — which is exactly why it's sometimes called "pay-as-you-earn" tax. It applies mainly to people whose income isn't already fully covered by TDS — freelancers, consultants, business owners, and anyone with meaningful capital gains or rental income — and missing it isn't just an administrative slip; it comes with real, calculable interest penalties under the Income Tax Act.

Who actually has to pay it

Any taxpayer — individual, freelancer, business, or company — whose total estimated tax liability for the financial year, after subtracting TDS already deducted, is ₹10,000 or more, is required to pay advance tax. Salaried employees usually don't need to think about this separately, since their employer's TDS typically covers most or all of their tax liability already — advance tax becomes relevant for them specifically when they have significant additional income their employer isn't accounting for: freelance income on the side, capital gains from selling stocks or property, rental income, or interest income substantial enough to push their total liability over the ₹10,000 threshold after TDS.

The instalment schedule

Advance tax isn't paid all at once — it's due in four instalments across the financial year, each covering a cumulative percentage of your total estimated tax liability for the year:

• By 15th June: at least 15% of the total estimated tax liability for the year.
• By 15th September: at least 45% of the total estimated tax liability (cumulative).
• By 15th December: at least 75% of the total estimated tax liability (cumulative).
• By 15th March: 100% of the total estimated tax liability (cumulative).

Each deadline is cumulative, not a separate fresh 15%/30%/30%/25% split — by the December deadline, for instance, you should have paid 75% of your full year's estimated liability in total, not just 30% more than what you'd paid by September on top of an unrelated base. Taxpayers who've opted for the presumptive taxation scheme under Sections 44AD or 44ADA have a simpler version of this: they can pay their entire advance tax liability in a single instalment by 15th March, rather than following the four-instalment schedule.

How to actually estimate your liability

Since advance tax is paid on estimated income for a year that hasn't finished yet, the practical approach is to project your full-year income based on what you've earned and reasonably expect to earn — extrapolating from your income so far, plus any known upcoming receipts (a large invoice you know is coming, a bonus, an expected capital gain) — then compute the tax on that projected total using the applicable slab rates for the year, and subtract any TDS you expect to have already been deducted by year-end. This projection inevitably involves some uncertainty, particularly for freelancers and business owners with irregular income, which is exactly why the law allows revising your estimate at each subsequent instalment as your actual income for the year becomes clearer — you're not locked into your June estimate for the rest of the year.

Step-by-step: how to pay

1. Estimate your total income for the financial year from all sources, and compute your total tax liability using the year's applicable slab rates (and regime, if you're choosing between old and new).
2. Subtract TDS you expect to have deducted on your income by year-end, and any tax already paid, to arrive at your net advance tax liability.
3. Check whether that net liability is ₹10,000 or more — if not, no advance tax instalment is due at all this quarter.
4. Pay via Challan 280 on the Income Tax Department's e-filing portal (incometax.gov.in), selecting "Advance Tax" as the payment type, using net banking, a debit card, or other portal-supported payment modes.
5. Keep the payment receipt (a BSR code and challan serial number) — you'll need these details when filing your return, to correctly claim credit for the advance tax you've already paid.
6. Reassess your estimate before each subsequent instalment deadline, since your actual income for the year becomes clearer as more of the year passes.

What happens if you miss an instalment or underpay

Two specific interest provisions kick in under the Income Tax Act. Section 234C charges interest for deferring an instalment — paying less than the required cumulative percentage by a given deadline — calculated at 1% per month for the shortfall, for a limited number of months depending on which instalment was short. Section 234B charges interest for a larger, more consequential shortfall: if your total advance tax paid across the year comes to less than 90% of your final assessed tax liability, interest at 1% per month applies from April of the following year until you actually pay the balance, until your return is filed and the full liability settled. These aren't symbolic — for a meaningful liability shortfall carried for several months, the interest adds up to a real cost, which is the core incentive the system is built around: estimate reasonably and pay on schedule, rather than treating advance tax as optional and settling everything at return-filing time.

A worked example

Say a freelance designer projects ₹12,00,000 in total income for the year, with ₹80,000 already deducted as TDS by clients over the year. Using the applicable slab rates, suppose their total computed tax liability for the year comes to ₹1,00,000. Subtracting the ₹80,000 TDS already deducted leaves a net advance tax liability of ₹20,000 — which is above the ₹10,000 threshold, so advance tax instalments are required. By 15th June, they should have paid at least 15% of ₹1,00,000 (i.e. ₹15,000) in total tax terms, which after netting off proportional TDS already received translates to a specific instalment amount; by 15th September, a cumulative 45% (₹45,000 in total tax terms); by 15th December, 75%; and the full ₹1,00,000 by 15th March. If their actual income comes in higher than projected — a large client payment in the last quarter, say — they'd revise the estimate before the December or March instalment rather than underpaying based on the stale June projection.

Capital gains and other unpredictable income — a specific timing relief

Advance tax's instalment schedule assumes you can reasonably project your income across the year, which works fine for steady salary or business income but breaks down for a genuinely unpredictable one-off event — selling a property in January, for instance, or an unexpected large capital gain. The law accounts for this: for income that specifically couldn't have been reasonably anticipated (like capital gains, lottery winnings, or certain other unforeseeable receipts), Section 234C doesn't penalise you for not having included it in your earlier instalment estimates, provided you pay the tax on it in the immediately following instalment after it actually arises. This is a genuinely useful, specific relief — it means a large, unplanned capital gain in November doesn't retroactively put you in default on your June and September instalments for not having predicted it, as long as you pay the resulting tax with the December instalment.

Common mistakes people make with advance tax

• Assuming advance tax only applies to businesses, when any individual with enough non-TDS-covered income (freelance work, capital gains, rental income) can cross the ₹10,000 threshold too.
• Underestimating a big one-off capital gain or bonus mid-year and not revising the estimate for the next instalment, resulting in a 234C shortfall that could have been avoided.
• Confusing the cumulative percentage schedule (15/45/75/100) with a flat quarterly split, and underpaying an instalment as a result.
• Forgetting that senior citizens without business/professional income are exempt, and either overpaying unnecessarily or, less commonly, assuming a working senior citizen with a business is also exempt when they aren't.
• Not keeping the Challan 280 payment details handy at return-filing time, complicating the process of correctly claiming credit for tax already paid.
• Ignoring advance tax entirely as a freelancer just because clients are already deducting TDS, without checking whether that flat-rate TDS actually covers the real liability once total income is properly computed at slab rates.

Beyond interest: what a persistent shortfall can lead to

The 234B/234C interest described above accrues automatically and is usually the only consequence for a routine, modest shortfall — most taxpayers who underpay advance tax by a reasonable margin simply pay the interest along with their return and move on. A large, sustained gap between advance tax paid and actual liability over multiple years, however, is also the kind of pattern that can draw closer scrutiny during routine return processing or scrutiny assessment, since it's a visible signal in the data the tax department already has from TDS returns, AIS (Annual Information Statement) and your own filed returns. Treating advance tax compliance as connected to your broader filing accuracy — rather than an isolated instalment schedule you can quietly ignore — is the more resilient way to think about it.

Salaried employee, freelancer, or business owner — how the obligation differs in practice

A purely salaried employee with no other significant income essentially never deals with advance tax directly — their employer's TDS, computed on the full projected annual salary, is designed to already cover their liability, and any small residual gap typically falls under the ₹10,000 threshold or gets settled as self-assessment tax at filing time. A freelancer or consultant sits at the other end: clients may deduct TDS at a flat rate (commonly 10% under Section 194J for professional fees) regardless of the freelancer's actual tax slab, which frequently under-covers their real liability once their total income is properly computed — making it very common for a freelancer earning a comfortable income to owe advance tax even after TDS. A business owner, particularly one not under presumptive taxation, usually has the least TDS coverage of the three, since business receipts often aren't subject to TDS at all, making advance tax the primary mechanism through which most of their annual tax liability gets paid before filing.

Advance tax vs TDS vs self-assessment tax — how they fit together

These three aren't competing options — they're different stages of the same overall tax-payment timeline. TDS is tax someone else (an employer, a client, a bank) deducts and deposits on your behalf as income is paid to you, throughout the year. Advance tax is what you personally estimate and pay in instalments during the year for the portion of your liability TDS doesn't already cover. Self-assessment tax is what you pay after the financial year ends, when filing your return, to cover any remaining gap between your final computed liability and what's already been paid via TDS and advance tax combined. Getting advance tax right during the year is specifically what minimises how much self-assessment tax (and 234B/234C interest) you owe at filing time.

It helps to think of these three as filling in the same total-liability bar from different directions across the year, rather than three separate obligations to track in isolation. TDS fills in whatever portion the law requires someone else to withhold at source, continuously as income is paid. Advance tax is you proactively filling in the remaining gap yourself, in four scheduled instalments, based on your own running estimate. Self-assessment tax is whatever sliver is still unfilled once the year has actually ended and your real numbers — not an estimate — are known. A taxpayer who tracks their estimated liability reasonably well through the year should find their self-assessment tax bill small, since most of it was already handled by TDS and advance tax along the way; a large self-assessment tax bill at filing time is usually a sign that advance tax was underpaid or skipped altogether during the year, not a normal or expected outcome.