Advance Tax FY 2026-27: Due Dates, Calculation & Penalty Guide

Advance tax is the income tax paid in installments during the financial year itself, rather than as a lump sum at year-end. Under Section 208 of the Income Tax Act, 1961, every taxpayer whose estimated tax liability exceeds ₹10,000 in a year must pay advance tax on time. For CA firms managing multiple clients, tracking advance tax across different income profiles and tax regimes is one of the most time-sensitive compliance tasks of the year — and the first installment for FY 2026-27 falls due on June 15, 2026.

Who Must Pay Advance Tax?

Advance tax applies to virtually every category of taxpayer with income beyond salary TDS:

• Individuals, HUFs, partnership firms, companies and LLPs with net tax liability above ₹10,000
• Salaried employees earning additional income from capital gains, house property, interest, freelance work or business
• Business owners and professionals — unless they have opted for presumptive taxation under Section 44AD or 44ADA

Who is exempt from advance tax?

• Senior citizens aged 60 years or above who have no income from business or profession
• Taxpayers under the presumptive taxation scheme (Sections 44AD/44ADA) — they pay 100% of advance tax in a single installment by March 15

Advance Tax Due Dates for FY 2026-27

The Income Tax Department has prescribed four installment deadlines. Each installment represents a cumulative percentage of the total estimated tax for the year.

For presumptive taxpayers under Section 44AD/44ADA: The entire advance tax liability is payable by March 15, 2027 in a single installment.

How to Calculate Advance Tax: Step-by-Step

Step 1 — Estimate Total Income for FY 2026-27

Add up all expected income across every head:

• Salary, business income or professional fees
• House property income (net of 30% standard deduction for let-out properties)
• Capital gains — short-term (taxable at 15% or 20%) and long-term (at 10% or 12.5%)
• Other sources such as fixed deposit interest, dividends and royalty

Step 2 — Subtract Eligible Deductions

Under the old tax regime, claim applicable Chapter VI-A deductions:

• Section 80C: Up to ₹1.5 lakh (EPF, PPF, ELSS, life insurance premium, home loan principal)
• Section 80D: Health insurance premium — ₹25,000 for self/family; ₹50,000 for senior citizens
• Section 80CCD(1B): Additional ₹50,000 for National Pension System (NPS) contributions
• Section 80TTA / 80TTB: Savings account or FD interest deduction

Under the new tax regime (default for FY 2026-27), no deductions apply except a standard deduction of ₹75,000 for salaried taxpayers.

Step 3 — Apply the Applicable Slab Rates

New tax regime slab rates for FY 2026-27 (individuals):

Add 4% health and education cess on the computed tax. If income is up to ₹7 lakh under the new regime, the Section 87A rebate of ₹25,000 reduces final tax liability to nil.

Step 4 — Deduct TDS Already Credited

Subtract TDS already deducted by the employer (Form 16), banks (Form 16A) and other deductors, as reflected in Form 26AS or the Annual Information Statement (AIS).

Net Advance Tax Liability = Total Tax − TDS Deducted − Section 87A Rebate (if applicable)

If this net amount exceeds ₹10,000, advance tax payment is mandatory.

Worked Example: Freelance Professional

Ms. Preethi Nair, a Bengaluru-based independent management consultant, estimates her FY 2026-27 income as:

• Professional fees: ₹22,00,000
• Fixed deposit interest: ₹80,000
• Total income: ₹22,80,000

Tax under new regime: approximately ₹3,84,000 + 4% cess = ₹3,99,360

TDS deducted by clients under Section 194J: ₹2,20,000

Net advance tax liability: ₹1,79,360

Installment schedule:

1. 1By June 15, 2026: ₹26,904 (15%)
2. 2By September 15, 2026: ₹53,808 (next 30%)
3. 3By December 15, 2026: ₹53,808 (next 30%)
4. 4By March 15, 2027: ₹44,840 (final 25%)

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

Section 234C — Shortfall at Each Installment Date

If the cumulative advance tax paid by any due date falls short of the required percentage, interest at 1% per month is charged on the shortfall:

• For the June, September and December installments: interest is charged for 3 months
• For the March installment: interest is charged for 1 month

Example: If Ms. Nair skips the June 15 installment entirely, interest = ₹26,904 × 1% × 3 months = ₹807. Small individually, but across a client portfolio it adds up fast.

Section 234B — Aggregate Shortfall by March 31

If the total advance tax paid before March 31 is less than 90% of the assessed tax, interest under Section 234B applies at 1% per month from April 1 of the assessment year (AY 2027-28) until the date of actual payment or assessment order.

Both Sections 234B and 234C can apply simultaneously, making cumulative interest significant for higher-income taxpayers who defer payment to year-end.

Practical Tips to Avoid Interest

1. 1Review income estimates at each installment date — revise upward if business turnover is growing ahead of projections
2. 2Account for capital gains immediately after the sale transaction; do not wait until March to compute the tax impact
3. 3Cross-check Form 26AS and AIS regularly so TDS credits are correctly reflected before computing net liability
4. 4Pay advance tax using Challan ITNS 280 on the Income Tax portal; record the CRN (Challan Reference Number) for every payment
5. 5If income rises significantly mid-year, pay the additional amount in the next installment to stay within Section 234C tolerance limits

How corpus Helps CA Firms Manage Advance Tax at Scale

For a CA firm managing 50 or 100 clients, manually tracking advance tax estimates across different income profiles, TDS credits and installment dates is error-prone and time-consuming. corpus eliminates this friction end to end:

• Automated income projection: corpus reads live P&L data from each client's books and projects full-year income, generating an advance tax liability dashboard across your entire client portfolio from a single screen.
• TDS reconciliation built in: corpus integrates Form 26AS and AIS data so net tax liability is always current — no manual ledger matching or spreadsheet lookups required.
• Installment reminders: Automated WhatsApp and email alerts go to clients 7 days and 1 day before each due date, reducing last-minute follow-up calls to your team.
• Challan tracking: Log advance tax payments directly against each client record and generate a consolidated installment payment report for internal review or client communication.
• Tax regime comparison: Toggle between the old and new tax regime for any client to surface which option results in lower advance tax, enabling proactive advisory conversations that deepen client trust.

With corpus, advance tax season becomes a structured, trackable workflow rather than a calendar-driven scramble across spreadsheets and WhatsApp groups.

Conclusion

The June 15 deadline for the first advance tax installment of FY 2026-27 is just two days away. Clients who have received capital gains, launched new business ventures or switched jobs mid-year are the most likely to be under-prepared. Review their income profiles now, calculate net liability after TDS credits, and ensure the first installment is paid on time to avoid Section 234C interest.

corpus helps your CA firm manage this process for every client — from income estimation to challan tracking — in one unified platform. Schedule a free demo and see why CA firms across India are switching to corpus for smarter, faster compliance management.