Advance Tax for Traders — Quarterly Deadlines, 234C Interest & How to Calculate
If you earn F&O income, intraday profits, or capital gains, you cannot wait until March to pay your taxes. The Income Tax Act requires you to estimate your tax for the year and pay it in four installments — this is advance tax. Get the installment wrong or miss a deadline, and Section 234C adds 1% per month interest on the shortfall. This guide explains every deadline, how to calculate each installment, and the special rules that apply specifically to trading income.
For FY 2026-27, the second advance tax installment (cumulative 45% of annual tax) is due on 15 September 2026. If you missed the June installment or need to revise your estimate upward, factor that in now.
1. What is advance tax and who must pay it
Advance tax is exactly what the name says — tax paid in advance, in installments across the financial year, rather than all at once when you file your return. The Income Tax Department uses it to collect tax on income that doesn't have a TDS deduction at source — like F&O profits, intraday gains, capital gains, and freelance income.
Who must pay
You must pay advance tax if your net tax liability exceeds ₹10,000 after subtracting TDS already deducted. Net tax liability means: total tax on all your income, minus TDS deducted by your employer, bank, or any other party during the year.
| Type of taxpayer | Advance tax required? |
|---|---|
| F&O trader (any income level) | Yes — standard installment schedule |
| Intraday (speculative) trader | Yes — standard installment schedule |
| Salaried + trading income | Yes — on the tax due after TDS from salary |
| Investor with capital gains > ₹10,000 tax | Yes — with special rules (see Section 6) |
| Salaried only (no other income) | Usually not — employer TDS covers it |
| Senior citizen (60+) with no business income | Exempt from advance tax |
| 44AD / 44ADA presumptive taxpayer | One payment by 15 March only |
If you have ₹80,000 tax on your F&O income and your employer has already deducted ₹75,000 TDS from your salary, your net liability is only ₹5,000 — below the ₹10,000 threshold, so no advance tax is required. But if the net liability crosses ₹10,000, advance tax is mandatory.
2. Quarterly installment schedule and deadlines
Advance tax is paid in four installments. The percentages are cumulative — meaning by September 15 you should have paid 45% of your total annual advance tax, not just an additional 45% on top of June.
| Installment | Due Date | Cumulative % to pay | FY 2026-27 date |
|---|---|---|---|
| 1st installment | 15 June | 15% of advance tax | 15 June 2026 |
| 2nd installment | 15 September | 45% cumulative | 15 September 2026 |
| 3rd installment | 15 December | 75% cumulative | 15 December 2026 |
| 4th installment | 15 March | 100% cumulative | 15 March 2027 |
At each installment date, you recalculate your estimated tax for the full financial year (not just the income earned so far), then pay the cumulative percentage due. If your income estimate changes significantly between installments, you adjust at the next payment.
How to pay advance tax
Pay online through the Income Tax e-filing portal (incometax.gov.in) → e-Pay Tax → Challan 280 → Select "Advance Tax" (code 100). Keep the challan as proof. The amount reflects in your Form 26AS within a few days.
3. Section 234C — interest on late or short installments
If you pay less than the required percentage at any installment, or pay after the due date, Section 234C charges simple interest at 1% per month on the shortfall. The interest period depends on the installment:
| Installment | Interest rate | Interest period | Effect |
|---|---|---|---|
| Q1 — 15 June | 1% per month | 3 months | 3% total on shortfall |
| Q2 — 15 Sep | 1% per month | 3 months | 3% total on shortfall |
| Q3 — 15 Dec | 1% per month | 3 months | 3% total on shortfall |
| Q4 — 15 March | 1% per month | 1 month | 1% total on shortfall |
The shortfall at each installment is calculated on the cumulative amount. If you paid ₹0 by June 15 but should have paid ₹8,640 (15% of your advance tax), the shortfall is ₹8,640 and the interest is ₹8,640 × 1% × 3 = ₹259.
If you booked a large capital gain or had significant intraday trading profit after September 15, you are not penalised under 234C for not having paid that portion in the earlier installments — as long as you include it in the next installment. The law recognises that such income cannot always be predicted in advance.
4. Section 234B — if total advance tax paid is too low
Section 234C checks each installment. Section 234B looks at the total. If your total advance tax paid during the year (including TDS) is less than 90% of your assessed tax, Section 234B charges 1% per month on the deficit from 1 April of the assessment year until the date of assessment or payment.
| Section 234C | Section 234B | |
|---|---|---|
| What it checks | Each installment, individually | Total advance tax vs 90% of assessed tax |
| Interest rate | 1% per month | 1% per month |
| Interest period | 3 or 1 months per installment | April 1 AY to date of payment |
| Can be avoided by | Paying each installment in full and on time | Paying ≥ 90% of total tax as advance tax |
Both 234B and 234C can apply simultaneously. The total interest for a trader who ignores advance tax completely can run into several thousand rupees — more than the cost of simply paying on time.
Interest paid under Sections 234B and 234C cannot be deducted as a business expense. It is a pure cost of non-compliance — there is no tax benefit to offset it.
5. How traders estimate their advance tax
At each installment date, estimate your income and tax for the entire financial year — not just the months that have passed. The process is the same each quarter; you simply revise the estimate as the year progresses.
Step 1 — Estimate full-year income across all heads
- Salary: Easy — take your annual CTC or Form 16 figure from last year and adjust for any increment. Your employer communicates the projected TDS deduction.
- F&O income: Take your actual P&L from April to the installment date. Project the remaining months based on your trading frequency. If you're consistently profitable, use a conservative estimate. If you're loss-making, your advance tax liability may be lower.
- Intraday (speculative): Same approach — actual P&L to date, projected forward.
- Capital gains (STCG/LTCG): Include gains already booked. For unrealised gains in your portfolio, include them only if you expect to sell before March 31.
- Other income: Interest on savings accounts, FDs, rental income.
Step 2 — Calculate total tax
- Apply new regime slabs (or old regime if you've opted in)
- Add STCG at 20% on equity / 15% on debt gains
- Add LTCG at 12.5%, after ₹1.25L exemption on equity/mutual funds
- Add 4% health and education cess on the total tax
Step 3 — Subtract TDS already deducted
TDS deducted by your employer, bank (on FD interest), or any other party counts toward advance tax. Subtract the full-year TDS projection from your gross tax to get the net amount you need to pay as advance tax installments.
Step 4 — Pay the required cumulative percentage
Check what percentage is due at the current installment. Subtract what you've already paid in earlier installments, and pay the balance.
Advance Tax Estimator — pre-filled quarterly amounts
TaxSavingLab's Advance Tax Estimator lets you enter your salary, F&O income, STCG and LTCG for the year and instantly shows you the exact amount due at each of the four installments — including 234C interest if you've already missed one.
Calculate My Advance Tax →6. Special rules for F&O, capital gains, and presumptive income
F&O traders
F&O income is non-speculative business income. Standard advance tax installments apply — all four, on time. There is no exemption or special timing rule. Estimate your full-year F&O P&L at each installment date and pay accordingly. If your trading is seasonal or lumpy, err on the side of overestimating — you'll get any excess back as a refund when you file.
Intraday (speculative) traders
Same standard installment schedule applies to speculative income. The income is kept separate from F&O in ITR-3 but both go into the same advance tax calculation.
Capital gains — special timing provision
Capital gains that arise after an installment due date get a timing concession under the proviso to Section 234C:
- Capital gains arising after June 15: no 234C interest if you include them in the September 15 installment.
- Capital gains arising after September 15: no 234C interest if you include them in the December 15 installment.
- Capital gains arising after December 15: no 234C interest if you include them in the March 15 installment.
This is particularly useful for traders who book a large capital gain late in the year. You don't get penalised for not having paid advance tax on income you hadn't earned yet.
Presumptive income — Section 44AD / 44ADA
If you opt for presumptive taxation under Section 44AD (eligible businesses with turnover ≤ ₹3 crore) or 44ADA (professionals with receipts ≤ ₹75 lakh), you can pay 100% of your advance tax in a single installment by March 15. The quarterly schedule does not apply to you. However, this requires your F&O turnover to be within the presumptive limit and profit to be at least 6% of turnover — conditions most active F&O traders don't meet.
7. Worked example — salary + F&O trader
Let's walk through a full advance tax calculation for a common trader profile in FY 2026-27.
What if Arjun missed the June 15 installment?
₹259 is a small amount for missing one installment. But if Arjun skips all four and pays everything at the end, the 234C interest across all installments plus 234B interest from April 2027 can add up to ₹4,000–₹6,000 or more. Small amounts individually, but entirely avoidable.
What if his F&O income turns out to be ₹6L instead of ₹4L?
Advance tax is based on estimates. If Arjun's actual income is higher than projected, he pays the difference when filing his return (self-assessment tax). Section 234B applies if the total advance tax paid is less than 90% of the assessed tax. To be safe, traders with volatile F&O income should err toward overestimating at the December and March installments when they have more clarity on the full year's P&L.