Advance tax is exactly what it sounds like — paying your income tax in instalments during the financial year, as you earn, rather than as one payment when you eventually file your return. It applies to anyone whose estimated total tax liability for the year exceeds ₹10,000 after accounting for TDS already deducted, which in practice covers most business owners, freelancers, and anyone with significant income outside a salary where TDS is already comprehensively handled by an employer.
The Instalment Schedule
- By 15th June — 15% of estimated annual tax liability
- By 15th September — 45% of estimated annual tax liability (cumulative, meaning a further 30% on top of June's payment)
- By 15th December — 75% of estimated annual tax liability (cumulative)
- By 15th March — 100% of estimated annual tax liability (cumulative, i.e., the full remaining balance)
Salaried individuals whose tax is fully covered by employer-deducted TDS generally don't need to think about this at all — advance tax mainly bites on income the standard deduction-at-source system doesn't fully capture: business profits, capital gains (especially large or unexpected ones), rental income, or freelance and professional fees paid without adequate TDS.
How to Actually Estimate It, Not Just Divide by Four
You're calculating tax on your estimated income for the entire financial year, based on what you've already earned plus what you reasonably expect to earn — not on a formula that mechanically divides last year's final tax bill by four. For business owners with seasonal or lumpy income, this distinction matters a lot: revisit the estimate at each instalment date rather than assuming a flat run-rate. A spike in September revenue, for instance, should be reflected in the September and December instalments even if the June instalment was calculated against a more conservative early-year estimate — the cumulative percentages exist precisely to let later instalments correct for information you didn't have at the start of the year.
A worked example: Suppose you estimate ₹6,00,000 total tax liability for the year based on your business's trajectory. By 15th June, you should have paid at least ₹90,000 (15%). By 15th September, cumulative payments should reach ₹2,70,000 (45%) — meaning a further ₹1,80,000 due in that instalment if the June payment was made correctly. By 15th December, cumulative payments reach ₹4,50,000 (75%). By 15th March, the full ₹6,00,000 should be paid.
The Interest Penalty for Getting It Wrong
Two sections govern the interest exposure here. Section 234C imposes interest at 1% per month for shortfalls in each individual instalment against the cumulative percentage due at that point — even if you fully pay up by year-end, being short at an intermediate instalment date still triggers this interest for the period of that specific shortfall. Section 234B separately imposes interest at 1% per month on any shortfall in total advance tax paid by the end of the financial year (specifically, if less than 90% of the final assessed tax was paid as advance tax), running from the start of the following assessment year until the balance is actually paid.
Underpaying isn't catastrophic in the way a missed GST return can be — the interest is calculated only on the specific shortfall amount, for the specific period it remained unpaid, not as an escalating penalty. But consistently treating advance tax as optional and paying everything at filing time instead typically adds up to a meaningful, entirely avoidable interest cost across a full year, especially for businesses with a large, predictable tax liability.
A Small But Useful Safe Harbour
If your total shortfall across the year is genuinely small relative to your total liability, the accumulated 234B/234C interest is often modest enough that it's not worth restructuring your cash flow dramatically to avoid it entirely — but for businesses with substantial, predictable annual tax liability, building a simple quarterly reminder around these four dates, tied to an actual (even rough) re-estimate of the year's income each time, avoids the bulk of this cost for very little ongoing effort.
Frequently Asked Questions
Does advance tax apply to capital gains from selling a house or shares mid-year? Yes, but with a specific accommodation — since capital gains often can't be reasonably estimated in advance, advance tax on such gains is generally payable in the remaining instalments after the gain actually arises, rather than requiring you to have anticipated it in an earlier instalment.
Is there a minimum income threshold below which advance tax doesn't apply regardless of tax liability? Senior citizens (60 years or older) who don't have income from business or profession are specifically exempted from the advance tax requirement, even if their estimated tax liability exceeds ₹10,000 — they can pay the full amount at filing time (as self-assessment tax) without 234B/234C interest applying in the way it would for others.
Can I pay advance tax even if I'm not sure it's mandatory for me, just to be safe? Yes — advance tax challans (via Challan 280 on the income tax portal) can be paid by anyone at any time during the year; if it turns out you didn't strictly need to, the payment simply counts toward your final tax liability at filing time with no downside.