What Is Advance Tax and Do You Owe It If Your Investment Gains Were Large This Year?

You had a good year in the market. You redeemed a mutual fund that had grown significantly, sold some equity, or received dividends from several companies. The gains are real and the money is in your account. The tax return is due in July and you plan to declare everything there. There is nothing more to do before that, right?

For many investors, this assumption is correct. For those whose tax liability from investment gains is large enough, waiting until July to pay the entire tax bill means they owe the government interest on a late payment. This interest is not a penalty in the penal sense; it is a statutory interest charge that applies automatically when advance tax obligations are not met by the prescribed deadlines. It cannot be waived by circumstances or by a first-time default. It accrues from the due date of the advance tax instalment to the date the tax is eventually paid.

This article explains what advance tax is, when it applies to investors specifically, what the four due dates are for FY 2025-26, how to compute whether you owe it, and how to pay it. It also clarifies the important exemptions that make advance tax irrelevant for many salaried investors who have investment gains, and the specific situation where a large capital gain late in the year changes the calculation.

The Indian income tax system operates on a pay-as-you-earn basis. Tax is not meant to be paid entirely in March when the financial year ends. Instead, the Income Tax Act requires taxpayers whose total tax liability exceeds Rs 10,000 in a financial year to pay a portion of that tax in instalments throughout the year. These instalments are called advance tax.

The logic is straightforward. The government prefers a steady cash flow of tax receipts throughout the year rather than a large lump sum in March. For a business owner or investor whose income is not subject to TDS, advance tax ensures that tax is paid roughly contemporaneously with the income being earned, rather than nine to twelve months later when the ITR is filed.

TDS is the mechanism that makes advance tax largely irrelevant for salaried employees. When your employer deducts TDS from your salary each month, they are effectively paying your tax on your behalf throughout the year. If TDS deducted by the employer is sufficient to cover your total tax liability, there is no advance tax obligation.

Where advance tax becomes relevant is when an individual has significant income that is not subject to TDS at all, or is subject to TDS at a rate lower than the actual tax liability. Investment gains are the primary source of this gap. Capital gains from mutual fund redemptions and share sales are not subject to TDS for resident Indians (though they are for NRIs).

Interest on savings accounts and FDs is subject to TDS only if it exceeds certain thresholds, and even then at rates that may be lower than the actual liability. Large capital gains that are untaxed at source create an advance tax obligation.

The Rs 10,000 Threshold: When Advance Tax Applies

Advance tax applies when the net tax liability for the year, after subtracting all TDS and TCS that has been deducted or collected, exceeds Rs 10,000. This is the triggering threshold under Section 208 of the Income Tax Act.

Net tax liability for advance tax purposes means the total income tax payable on all income for the year, minus all TDS that has been or will be deducted by employers, banks, and other deductors, minus any TCS collected, minus any tax already paid as advance tax in earlier instalments.

For a salaried employee whose entire income consists of salary (with TDS deducted by the employer), the residual tax after TDS is typically small or nil. Advance tax is usually not an issue. But when the same employee has investment income alongside their salary, the calculation changes.

Here is the relevant scenario: A salaried employee earns Rs 15 lakh per year. The employer deducts TDS of Rs 1,50,000 covering the full tax on the salary. The employee also redeems equity mutual funds with LTCG of Rs 5 lakh during the year, and has an FD interest income of Rs 60,000 (TDS deducted at source on the interest). The LTCG of Rs 5 lakh above the Rs 1.25 lakh exemption produces taxable LTCG of Rs 3.75 lakh. Tax on this at 12.5 percent is Rs 46,875. No TDS was deducted on the capital gains. The net tax after the employer's TDS and the bank's TDS exceeds Rs 10,000. Advance tax applies to this investor.

The Rs 10,000 threshold applies to net tax liability after all TDS. A salaried investor whose employer TDS covers the salary tax but who also has untaxed capital gains may have an advance tax obligation they are unaware of.

The Four Advance Tax Due Dates for FY 2025-26

Advance tax for FY 2025-26 is payable in four instalments across the financial year. The due dates and the cumulative percentage of estimated tax liability due by each date are prescribed under Section 211 of the Income Tax Act.

Instalment	Due Date	Cumulative Tax to Be Paid by This Date	What This Means in Practice
First instalment	15 June 2025	At least 15% of estimated annual tax liability	Pay 15% of your total estimated FY 2025-26 tax by 15 June 2025
Second instalment	15 September 2025	At least 45% of estimated annual tax liability (cumulative)	Total advance tax paid by this date must be at least 45% of the year's liability
Third instalment	15 December 2025	At least 75% of estimated annual tax liability (cumulative)	Total paid by this date must reach 75% of year's liability
Fourth instalment	15 March 2026	100% of estimated annual tax liability (cumulative)	All remaining advance tax due; pay the full balance by 15 March

These dates are for non-corporate taxpayers (individuals and HUFs) other than those opting for the presumptive taxation scheme. For those who have opted for the presumptive scheme under Section 44AD or 44ADA, a simplified rule applies: the entire advance tax is due in a single instalment by 15 March of the relevant financial year.

For FY 2025-26, these dates are in the past. If you are reading this in June 2026 and have already filed or are about to file for AY 2026-27, the advance tax due dates have passed. The relevant question now is whether you paid sufficient advance tax by each of these dates. If you did not, interest under Sections 234B and 234C applies and will be computed when you file your return or when the ITR is processed.

Interest for Non-Payment or Short Payment: Sections 234B and 234C

Two separate interest provisions apply when advance tax is not paid or is paid in insufficient amounts.

Section 234B interest applies when the total advance tax paid by 31 March of the financial year is less than 90 percent of the assessed tax liability for the year. The interest is charged at 1 percent per month (or part of a month) on the shortfall, from 1 April of the assessment year until the date the tax is actually paid. This interest applies when the payment made by 15 March falls short of 90 percent of the actual liability.

Section 234C interest applies to each specific instalment shortfall. If you did not pay the correct amount by each quarterly due date, interest at 1 percent per month is charged on the shortfall at each instalment date for a period of three months (for the first three instalments) or until 31 March (for the fourth instalment). Section 234C interest is computed instalment by instalment, not just at year end.

Interest Provision	When It Applies	Rate	Period of Charge
Section 234B	Total advance tax paid by 31 March is less than 90% of the assessed tax	1% per month or part thereof	From 1 April of the AY until the date the deficit is paid (through self-assessment tax at filing)
Section 234C	Shortfall at each quarterly instalment (15 June, 15 September, 15 December, 15 March) relative to cumulative percentages	1% per month or part thereof	3 months for each of the first three instalments; until 31 March for the fourth instalment
Section 234A	Late filing of the ITR (after the due date)	1% per month or part thereof	From the due date of filing until the actual date of filing

A practical example of how Section 234C interest is computed: If the total tax liability for FY 2025-26 is Rs 2 lakh, the advance tax due by 15 September was 45 percent of Rs 2 lakh, which is Rs 90,000. If only Rs 50,000 was paid by 15 September (from the first instalment), the shortfall is Rs 40,000. Section 234C interest on this shortfall is Rs 40,000 multiplied by 1 percent per month multiplied by 3 months equals Rs 1,200. Similar calculations apply for each instalment.

The aggregate Section 234C interest for a full year of shortfalls can reach 3 to 4 percent of the unpaid tax, which is meaningful but not catastrophic. However, Section 234B interest continues from 1 April until the payment date, which for investors who pay the balance at ITR filing time (July or August) adds another 4 to 5 percent. Together, the two interest provisions can add 7 to 9 percent of the tax liability in effective interest cost. On a Rs 1 lakh tax liability, this is Rs 7,000 to Rs 9,000.

The Capital Gains Complication: Income That Arrives at Irregular Times

The advance tax framework presents a specific practical challenge for investors with capital gains income, because capital gains are realised at irregular times during the year and are not evenly distributed across the four quarterly instalment dates.

Consider an investor who had no capital gains in the first half of the year but redeemed a large equity fund position in February 2026, just weeks before the 15 March advance tax deadline. The capital gain is Rs 8 lakh of LTCG. The tax on the taxable LTCG (above Rs 1.25 lakh) at 12.5 percent is Rs 84,375. This entire liability arose in a single month, after three of the four advance tax instalments have already passed.

How much Section 234C interest applies to this late capital gain? The Income Tax Act provides a specific relief here that many investors are unaware of. Under the proviso to Section 234C, if the shortfall in advance tax instalments is on account of capital gains or casual income (lottery, etc.) that could not reasonably be anticipated at the earlier instalment dates, no Section 234C interest is levied on that shortfall, provided the entire tax on such income is paid in the instalment immediately following the date of realisation of the gain or by 31 March, whichever is earlier.

In practical terms, this means: if you realise a large capital gain in January or February 2026 (after the December instalment date), no Section 234C interest applies to the tax on that gain, provided you pay the full tax on that capital gain by 15 March 2026 (the fourth instalment due date). Section 234B interest would still apply from 1 April 2026 if you did not pay by 15 March, but 234C instalment shortfall interest does not penalise you for not having anticipated a January capital gain in June.

Capital gains realised late in the year get specific relief from Section 234C instalment interest, provided you pay the tax on that gain by 15 March. If you miss the 15 March deadline, Section 234B interest starts from 1 April.

How to Compute Your Advance Tax Obligation

Computing whether you owe advance tax, and how much, requires estimating your total tax liability for the full financial year, even though you are doing the calculation partway through the year.

The calculation has four steps.

Step 1: Estimate total income for the year. This includes all salary income, all capital gains realised so far and any you anticipate before 31 March, FD and savings account interest, dividends, rental income, and any other income sources. For capital gains that have already been realised, you have the exact figures. For those you expect to realise before year-end, you make a reasonable estimate.

Step 2: Compute the total tax on this income. Apply the applicable tax rates. For the new tax regime: the standard slab rates without the Chapter VI-A deductions. For the old tax regime: deduct applicable deductions (Section 80C up to Rs 1.5 lakh, Section 80D, etc.) and apply the old regime slab rates, plus special rates for capital gains (12.5 percent for LTCG, 20 percent for STCG, slab rate for debt fund gains).

Step 3: Subtract all TDS that has been deducted or will be deducted by year end. This includes employer TDS on salary (per your Form 16 or pay slips), TDS on FD interest (if applicable), and any other TDS credits you can anticipate. The result is your net tax liability.

Step 4: If the net tax liability exceeds Rs 10,000, advance tax applies. The amounts due at each instalment date are 15 percent, 45 percent, 75 percent, and 100 percent of the net liability on a cumulative basis.

Example: Salaried investor with capital gains	Amount	Tax Computation
Salary income	Rs 16,00,000	Taxable under applicable slab after standard deduction of Rs 75,000
LTCG from equity mutual funds	Rs 4,00,000	Rs 2,75,000 taxable (above Rs 1.25 lakh exemption) at 12.5% = Rs 34,375 tax
STCG from share sales	Rs 1,50,000	Rs 1,50,000 at 20% = Rs 30,000 tax
FD interest income	Rs 60,000	Added to income; taxed at slab rate
Total income tax (new regime illustration)	Approximately Rs 2,34,375	Salary tax approx Rs 1,70,000 + LTCG Rs 34,375 + STCG Rs 30,000
TDS from employer	Rs 1,70,000	Covers salary tax entirely
Net advance tax liability	Rs 64,375	Capital gains tax of Rs 64,375 is beyond what employer TDS covers; advance tax applies

 Advance tax is paid using Challan 280 on the income tax portal (incometax.gov.in) or through designated bank branches. The process is the same as paying self-assessment tax, but with a different code selected in the payment form.

On the income tax portal: log in at incometax.gov.in, go to e-Pay Tax, select New Payment, and choose Income Tax (other than companies) as the applicable tax. In the assessment year field, select AY 2026-27 (for FY 2025-26 income). In the type of payment field, select Advance Tax (code 100). Enter the amounts for each income type (income from capital gains, income from other sources, etc.) in the relevant fields, or enter the total amount. Complete the payment using net banking, debit card, or UPI.

After payment, save the challan receipt which contains the BSR code of the bank, the challan number, and the payment date. These details are entered in the ITR when filing to claim credit for the advance tax paid. The payment will also appear in Form 26AS under Part C (advance tax paid) once processed, typically within a few days.

There is no minimum payment amount for advance tax. If your net liability after TDS is Rs 15,000, pay the full Rs 15,000 in the appropriate instalment. If you miss an instalment date, pay as soon as possible to minimise the interest that continues to accrue.

Several categories of taxpayers are exempt from the advance tax requirement or subject to modified rules.

• Individuals aged 60 or above (senior citizens) who do not have any income from business or profession: Senior citizens with only investment income (salary, pension, capital gains, interest, rent) are exempt from paying advance tax. They can pay their entire tax liability as self-assessment tax at the time of filing, without any interest under Section 234B or 234C.

• Individuals whose entire income is subject to TDS such that net tax after TDS is below Rs 10,000: If employer TDS and bank TDS fully cover the tax liability within the Rs 10,000 net threshold, no advance tax is required.

• Individuals opting for the presumptive taxation scheme (Section 44AD or 44ADA): Self-employed professionals and small business owners who opt for presumptive taxation have a simplified rule: pay the entire advance tax liability in a single instalment by 15 March.

Note that the senior citizen exemption only applies to those with no business or professional income. A retired person who receives rental income, pension, capital gains, and FD interest has no business income and is exempt from advance tax. A retired person who also runs a consulting practice as a sole proprietor does have professional income, and the exemption does not apply.

Your Situation: Do You Owe Advance Tax?

Your Situation	Advance Tax Obligation?	What to Do
Salaried only; employer TDS covers full tax liability; no other significant income	No; net tax after TDS is below Rs 10,000	No action needed; pay any small balance as self-assessment tax before filing
Salaried with significant capital gains; capital gains tax exceeds Rs 10,000 after considering TDS	Yes	Compute the tax on capital gains quarterly; pay advance tax by the due dates
Salaried with large capital gain realised in Q4 (January to March)	Potentially; pay by 15 March for Section 234C relief	Pay the tax on the late capital gain by 15 March to avoid 234C interest; Section 234B starts 1 April if still unpaid
Senior citizen (60+) with no business income; investment income only	No advance tax obligation	Pay full tax as self-assessment tax at filing; no interest under 234B or 234C
Business owner or professional (not presumptive)	Yes if net tax liability exceeds Rs 10,000	Pay quarterly at 15%, 45%, 75%, 100% cumulative by the respective due dates
Self-employed under presumptive taxation (44AD or 44ADA)	Single instalment by 15 March	Pay the full advance tax in one payment by 15 March of the relevant year
NRI with Indian income (capital gains, NRO interest, rental)	Generally not; TDS handles most NRI obligations	TDS deducted at source typically covers tax; ITR is used to claim excess TDS as refund

What Happens If You Did Not Pay Advance Tax

If you are filing your AY 2026-27 return now and you had a significant investment gain in FY 2025-26 but did not pay advance tax, the situation is manageable but involves interest.

Section 234B and 234C interest will be computed automatically by the income tax portal when you prepare your return. The ITR computation sheet shows these interest charges in the tax summary. You do not need to calculate them manually. The portal adds them to your total tax liability, and you pay the total (including the principal tax owed, Section 234B interest, and Section 234C interest) as self-assessment tax using Challan 280 before filing.

The practical step is: before filing, go to the tax computation page and see what the portal shows for interest under 234B and 234C. If the interest seems larger than expected, check whether the capital gain was eligible for the late-realisation relief under the proviso to Section 234C, and make sure you have indicated the quarter in which the gain was realised in the Schedule CG quarterly break-up. If the gain was all in Q4 (January to March 2026), the 234C interest on that gain should be nil as long as you are paying by the filing date.

Paying the interest honestly and filing the return accurately is always the right approach. The interest cannot be waived, but it is also not compounded. It is a simple 1 percent per month charge that stops accruing once the tax is paid.

Planning Ahead: How to Handle Capital Gains Advance Tax Proactively

For investors who expect large capital gains in FY 2026-27 (the current financial year as of writing), the advance tax planning can be incorporated into the investment calendar.

The simplest approach is to set a calendar reminder after each significant capital gain is realised: compute the tax on that gain at the applicable rate and check whether it, combined with any prior gains in the year, pushes the advance tax liability above the Rs 10,000 threshold. If it does, make a Challan 280 advance tax payment before the next quarterly due date.

For investors who trade actively or redeem mutual funds regularly, a quarterly tax estimate is more efficient than a per-transaction calculation. At the end of each quarter, sum up all the capital gains, compute the tax, subtract any TDS received, and pay the net amount as advance tax by the quarter's due date. This quarterly reconciliation takes 15 to 20 minutes and prevents the cumulative interest from building up over the year.

The quarterly due dates for FY 2026-27 are: 15 June 2026, 15 September 2026, 15 December 2026, and 15 March 2027. For the first instalment due on 15 June 2026, the required payment is 15 percent of the estimated full-year tax liability. If your investment activity so far in FY 2026-27 has generated capital gains whose estimated tax exceeds Rs 10,000, a payment before 15 June 2026 is in order.

Disclaimer: This article is for educational purposes only and does not constitute tax or financial advice. Advance tax provisions, interest rates, instalment percentages, due dates, and exemptions are based on the Income Tax Act, 1961 as applicable for FY 2025-26 and AY 2026-27. Tax rules and advance tax due dates are subject to amendment. All tax computations in this article are illustrative. Please consult a qualified chartered accountant for advice specific to your situation and for accurate computation of your advance tax obligations.