Advance tax FY 2026-27: the four instalments, the 234B/234C interest math, and presumptive scheme exemption

Reema Iyer, a 34-year-old product manager in Bengaluru, sent us a question after her July 2026 salary credit landed. Her CTC is Rs 28 lakh, she has freelance consulting income of Rs 6 lakh from a Singapore client, and short-term capital gains of Rs 1.8 lakh from an October 2025 equity sell-off. Her employer deducts TDS on salary every month under Section 192. Her question: "Do I still owe advance tax, and when?"

The answer is yes, and the first instalment was due on 15-Jun-2026. Missing it has already started a 1 per cent per month interest meter ticking under Section 234C. This guide walks through the four-instalment calendar for FY 2026-27, the precise interest formula, the presumptive scheme carve-out, and the senior-citizen exemption, then resolves Reema's case down to the rupee. Every number below traces back to the Income Tax Act 1961 as published on indiacode.nic.in and the e-filing portal at incometax.gov.in.

The Scenario

The classic advance tax confusion has three flavours. First, a salaried employee with side income from freelancing, rental property, capital gains, or dividends, who assumes employer TDS is the end of the story. Second, a freelancer under Section 44ADA who has not realised the 100 per cent advance tax obligation collapses into a single 15-Mar deadline. Third, a recently retired senior citizen who keeps paying advance tax out of habit even though Section 207(2) carves them out entirely.

Reema sits in the first bucket. Her employer's TDS will cover the salary slab tax, but the freelance receipts and the equity short-term gain at 20 per cent under Section 111A (post-Finance Act 2024) sit outside the TDS net. The threshold question under Section 208 is whether the residual tax for FY 2026-27 will be Rs 10,000 or more after TDS credit. If yes, the four-instalment calendar applies.

Statutory Answer

The scheme is built on five sections of the Income Tax Act 1961. Section 207 defines liability to advance tax. Section 208 sets the Rs 10,000 floor. Section 209 prescribes the computation. Section 211 fixes the instalment percentages and due dates. Sections 234B and 234C levy the interest cost of missing them.

Section 208 floor

A taxpayer must pay advance tax in any financial year if the estimated tax payable, reduced by TDS and TCS credit reasonably expected, is Rs 10,000 or more. The figure is per assessee, not per income stream. A casual freelancer expecting only Rs 8,000 of residual tax after TDS is outside the regime entirely.

Section 207(2) senior-citizen carve-out

A resident individual aged 60 or more at any time during the previous year, who has no income chargeable under "Profits and gains of business or profession", is not liable to pay advance tax. Rental income, pension, interest, and capital gains do not trigger the section. The moment a senior citizen draws professional fees, the carve-out evaporates.

Section 211 calendar

The statutory calendar for FY 2026-27, applicable to assessment year 2027-28, is fixed. The table below mirrors Section 211(1)(a), which applies to all non-presumptive assessees including salaried individuals, companies, partnership firms, and HUFs.

Section 211(1)(b), inserted by Finance Act 2016, gives presumptive-scheme assessees a single deadline. A consultant filing under Section 44ADA, or a small trader under Section 44AD, pays 100 per cent of advance tax by 15-Mar-2027 in one go. There are no June, September, or December obligations. The trade-off is the loss of cash-flow flexibility, since the entire annual tax must be ready in March.

Section 234C interest on instalment shortfall

Section 234C charges 1 per cent simple interest per month for three months on the shortfall in each of the first three instalments, and one month on the shortfall in the fourth instalment. The trigger thresholds, however, are looser than the statutory 15/45/75 percentages, to allow forecasting tolerance. The interest applies if the advance tax paid is less than:

The proviso to Section 234C(1) is critical for capital gains and casual income. If a taxpayer earns a capital gain, lottery winning, or dividend after a due date, the shortfall attributable to that income escapes 234C interest, provided the related advance tax is paid in the immediately following instalment, or by 15-Mar if the income arises after the third instalment.

Section 234B interest on annual shortfall

Section 234B is the heavier stick. If total advance tax paid by 31-Mar-2027 is less than 90 per cent of assessed tax, 1 per cent per month (or part) accrues from 1-Apr-2027 until self-assessment payment. The clock runs on the entire shortfall, not on individual instalment misses. Pay everything by 15-Mar and 234B never bites.

Worked Resolution

Return to Reema. Her projected FY 2026-27 income, computed under the new tax regime (default per Section 115BAC), looks like this.

New-regime slab tax on Rs 33,25,000 for FY 2026-27 works out to approximately Rs 6,57,500 before cess, plus 4 per cent cess of Rs 26,300, totalling Rs 6,83,800 on the slab portion. The Rs 1.8 lakh short-term capital gain attracts Section 111A tax of 20 per cent, or Rs 36,000, plus 4 per cent cess of Rs 1,440, totalling Rs 37,440. Total estimated tax liability: Rs 7,21,240.

Her employer's monthly TDS on a Rs 28 lakh salary works out to roughly Rs 50,000 per month, or Rs 6,00,000 over the year. The residual liability after TDS credit: Rs 1,21,240. This is well above the Rs 10,000 Section 208 floor, so advance tax applies. Use our advance tax calculator to validate the split, and the income tax calculator for the underlying liability.

The instalment schedule for Reema

Reema missed 15-Jun-2026. Assume she pays Rs 18,186 on 16-Jul-2026. Section 234C interest on the first instalment shortfall = 1 per cent x 3 months x Rs 18,186 = Rs 546. A one-day slip costs the same as a three-month slip; the formula does not pro-rate within the window.

If she sells another equity tranche on 20-Sep-2026 yielding Rs 50,000 STCG, the additional Rs 10,400 of tax (20 per cent plus 4 per cent cess) is sheltered by the Section 234C(1) proviso, provided it is included in the 15-Dec-2026 instalment.

What if Reema files under Section 44ADA?

If Reema restructures her freelance income as a Section 44ADA presumptive practice, the freelance-related advance tax collapses into a single 15-Mar-2027 payment. The salary side remains a TDS matter under Section 192 read with Section 209(1)(d). This is where old-vs-new regime and presumptive tax modelling matters before mid-year. A 44ADA election locked in by July saves four trips to the tax counter, not just one.

Payment mechanics

Advance tax is paid using Challan 280 on the e-filing portal at incometax.gov.in. Select "100 - Advance Tax" as the type, assessment year AY 2027-28 for FY 2026-27 payments, and the relevant PAN. A successful payment generates a Challan Identification Number that auto-populates Form 26AS and the Annual Information Statement, so no manual credit claim is needed in the ITR.

FAQ

Can I revise my advance tax estimate during the year?

Yes. Section 210(5) permits a revised estimate until 15-Mar of the financial year. A salaried professional who picks up a sudden Rs 10 lakh consulting contract in October can scale up the December and March instalments accordingly. The 234C safe-harbour test for prior instalments is judged on the original lower estimate, not the upward revision, per CBDT Circular 2/2015.

What if my tax liability turns out to be lower than my advance tax payment?

The excess is refunded with interest under Section 244A at 0.5 per cent per month from 1-Apr-2027 (the start of AY 2027-28) until the refund date. If a Section 245 set-off notice proposes to adjust the refund against an old demand, you have 30 days to respond. See our piece on Section 245 refund set-off notices.

Are non-resident Indians liable to pay advance tax?

Yes. The Section 208 Rs 10,000 floor applies to any assessee, resident or non-resident, with Indian-source tax after TDS. NRIs face heavier withholding on rent (Section 195) and capital gains, so the residual is often below the floor, but high-income NRI consultants and multi-property landlords routinely trip into the calendar.

Do I pay advance tax on lottery winnings?

Section 194B withholds 30 per cent TDS on lottery and game-show winnings above Rs 10,000. Residual cess and surcharge may still push the assessee into advance tax territory. The Section 234C(1) proviso treats lottery winnings like capital gains: include the related tax in the instalment immediately after receipt.

What is the difference between TDS and advance tax?

TDS is withheld at source by the payer (employer, bank, tenant, client) under Sections 192 to 196D. Advance tax is paid directly by the assessee on income that escapes TDS or where TDS is insufficient. For pure salary earners, Section 192 TDS already mimics the advance tax cadence. The moment a second income source appears, advance tax fills the gap. Use our TDS calculator to see the withholding pattern.

How does advance tax interact with capital gains realised on 31-Mar-2027?

A capital gain crystallised on 31-Mar is fully covered by the Section 234C(1) proviso. There is no instalment after 15-Mar within FY 2026-27, so the related tax can be paid by 31-Mar-2027 as self-assessment tax under Section 140A without attracting 234C. Use the capital gains calculator for the post-Finance Act 2024 rates of 12.5 per cent on long-term and 20 per cent on short-term equity gains.

What happens if I miscalculate and pay 89 per cent instead of 90 per cent by 31-Mar?

The Section 234B clock starts at 1 per cent per month from 1-Apr on the entire shortfall, not just on the 1 per cent gap. A taxpayer who pays 89 per cent of Rs 1,21,240, or Rs 1,07,904, is short by Rs 13,336. If cleared on 31-Jul-2027 with the ITR, 234B interest = 1 per cent x 4 months x Rs 13,336 = Rs 533. Layer this on top of any 234C already accrued. The 90 per cent cliff edge is the single most expensive mistake in advance tax planning.