Advance Tax on Capital Gains: Salaried Investor Guide AY 2026-27
Your employer deducts TDS on your salary every month — so advance tax probably isn't on your radar. Then you sold equity mutual fund units in June. Or your debt MF redemption generated ₹2.1 lakh in indexation-adjusted gains. Or you received ₹94,000 in FD interest this year. None of that shows up in your Form 16. And June 15 — the first advance tax instalment — just passed.
Here is exactly what you owe, when the Section 234C interest penalty doesn't apply, and what to do before September 15.
Summary
| Item | Rule |
|---|---|
| Advance tax instalments | 15% by June 15 · 45% by Sep 15 · 75% by Dec 15 · 100% by Mar 15 |
| 234C interest rate | 1% per month, simple, on instalment shortfall (max 3 months per quarter) |
| Capital gains exception | Gains arising after an instalment date — 234C is waived for that instalment |
| ₹10,000 safe harbour | If total net tax < ₹10,000 for the FY, no advance tax is required at all |
| Employer TDS offset | Deduct projected annual TDS from advance tax before calculating your shortfall |
| First self-payment for July gains | September 15 only — zero Q1 penalty |
Why Your Employer's TDS Isn't Enough
Section 192 TDS covers only salary income. The tax on capital gains, FD interest, dividends, and rental income is your responsibility to estimate and pay quarterly. If that non-salary net tax exceeds ₹10,000 in the financial year, advance tax is mandatory.
What your Form 16 leaves uncovered
- STCG on equity and equity MFs: taxed at 20% + 4% cess
- LTCG on equity and equity MFs above ₹1.25 lakh: taxed at 12.5% + 4% cess
- FD, savings account, and bond interest: taxed at your slab rate
- Dividends: taxed at slab (10% TDS by the company, but you may owe the difference)
- Gains on property, debt MFs, gold: taxed per applicable capital gains rules
For a ₹18L CTC professional in the new regime, ₹5 lakh in STCG alone generates ₹1,04,000 in tax. That crosses the ₹10,000 threshold and triggers the advance tax requirement.
The Section 234C Waiver — Why Most Salaried Investors Don't Owe Q1 Penalty
Section 234C (renumbered Section 425 in the Income Tax Act 2025) imposes 1% per month simple interest on any instalment shortfall. The interest runs for 3 months on the June and September instalments, and 1 month on the December instalment.
The statutory exception: If capital gains or other unforeseeable income arises after an instalment date, Section 234C interest is waived for that instalment on those gains. You include them in the next instalment's calculation instead.
| When you sold | Q1 waiver (June 15)? | Q2 waiver (Sep 15)? |
|---|---|---|
| Before June 15, 2026 | No — gain was foreseeable at Q1 | No |
| July or August 2026 | Yes | No |
| October or November 2026 | Yes | Yes |
| December 2026 | Yes | Yes |
If you sold equity in July, you owe zero 234C interest for Q1 — even if you pay the entire capital gains tax in one shot by March 15. The law is explicit: gains that didn't exist at the instalment date cannot be considered a "missed" payment.
Asset-Class Matrix: Who Gets the Waiver
| Income type | 234C waiver available? | Why |
|---|---|---|
| STCG / LTCG on equity, equity MFs (after the instalment date) | Yes | Capital gains — statutory exception under Section 234C proviso |
| LTCG on property sold after the instalment date | Yes | Capital gains — statutory exception |
| FD / savings account interest | No | Foreseeable income; accrues from the day the FD is opened |
| Dividend income | No | Foreseeable once declared; TDS already applied |
| F&O / intraday trading income | No | Business income — must be estimated quarterly |
| Crypto / VDA gains (post-installment) | Contested | VDA is classified as "other sources," not capital gains; no CBDT ruling yet |
FD interest is the most common trap. Even if your FD matures in November, the interest accrued from day one. Miss Q1 on FD interest and 234C runs — no waiver available.
Real Example: ₹18L Salary, ₹5L STCG in July
Priya, Bengaluru. ₹18L gross salary, new tax regime. Employer deducts ₹18,000 TDS per month (₹2,16,000 for the year — covers her salary tax including 4% cess). In July 2026, she redeems equity MF units and books ₹5 lakh in STCG.
| Tax component | Amount |
|---|---|
| STCG (₹5L × 20%) | ₹1,00,000 |
| Cess (4%) | ₹4,000 |
| Total STCG tax | ₹1,04,000 |
| Salary tax (covered by employer TDS) | ₹2,16,000 |
| Total FY tax | ₹3,20,000 |
Priya's advance tax schedule:
| Date | Cumulative (%) | Amount due | Employer TDS credited | Self-payment | 234C? |
|---|---|---|---|---|---|
| June 15 | 15% | ₹48,000 | ₹54,000 (Apr–Jun) | ₹0 | None — TDS exceeds Q1 AND gain didn't exist yet |
| Sep 15 | 45% | ₹1,44,000 | ₹1,08,000 (Apr–Sep) | ₹36,000 | None on STCG — July sale, waiver applies |
| Dec 15 | 75% | ₹2,40,000 | ₹1,62,000 | ₹78,000 total | Depends on prior payments |
| Mar 15 | 100% | ₹3,20,000 | ₹2,16,000 | ₹1,04,000 total | — |
Priya's action: pay ₹36,000 via Challan 280 on the IT Portal by September 15. Or skip Challan 280 entirely and use the employer TDS lever (see below).
The Section 192(1B) Lever — Cover Capital Gains Tax Through Payroll
Section 192(1B) allows any salaried employee to submit a written declaration to their employer estimating additional income for the FY — capital gains, FD interest, rental income, or anything else not covered by their CTC. The employer then deducts extra TDS monthly to cover it.
The effect: no Challan 280, no bank queue, no missed deadlines. The additional TDS flows directly to Form 26AS and is credited in your ITR automatically.
For Priya: a declaration citing ₹5L STCG, tax of ₹1,04,000 over the remaining 8 months (August through March) → employer increases TDS by ₹13,000 per month. Advance tax fully covered through salary deductions alone.
This option exists in virtually every payroll system. Most employees simply don't ask — and end up paying Challan 280 unnecessarily, or accumulating 234C interest on non-capital-gains income like FD interest.
What to Do This Week
- Pull your P&L statement — Zerodha Console → Tax → P&L; Groww → Portfolio → Taxes. Total your realised STCG and LTCG from April 1, 2026 to today.
- Check your gain dates — gains after June 15 carry a Q1 waiver. Gains before June 15 mean 234C is already running at 1% × 3 months on the shortfall.
- Calculate your residual — estimated total FY tax minus projected employer TDS for the year. If the result is under ₹10,000, you're done.
- Choose your path — pay Challan 280 at incometax.gov.in (select Tax Applicable: 0021, Type: 100 — Advance Tax) by September 15, or submit a Section 192(1B) declaration to payroll to cover it through TDS instead.
September 15 Is the Line
The 234C waiver on capital gains reduces what you owe — it doesn't eliminate the obligation to pay. Miss September 15 on a ₹1 lakh tax liability and the 234C interest is ₹3,000 — avoidable, certain, and permanent. Miss the March 15 final instalment and Section 234B runs on the full year's shortfall at the same 1% per month until you file.
The numbers here take 20 minutes to run from your broker's P&L. Do it before September 15.
Ready for a personalised plan? Start your free diagnosis — 6 questions, 5 minutes.
