Estimated Tax
Meaning, Calculation & How It Works in India
5 min readEstimated tax is income tax you pay in instalments during the financial year itself, based on what you expect to earn, instead of waiting until after March 31 to settle the full bill. India calls it advance tax. Sections 208 to 211 of the Income Tax Act, 1961 lay out the rules, and the trigger is straightforward: if your tax liability for the year, after subtracting whatever TDS has already been deducted, crosses Rs.10,000, you owe advance tax in four quarterly hits.
What Is Estimated Tax?
Salaried employees rarely deal with this because TDS covers them. But a garment wholesaler in Vadodara pulling Rs.18 lakh net profit? A dentist in Nashik whose clinic income has no TDS? They are squarely in advance tax territory, and most of them find out the hard way, usually when the CA calls in May asking for last year’s P&L.
How Is Estimated Tax Calculated?
Frankly, the formula is simple. Getting the inputs right is where people trip up.
Formula: Advance Tax = (Tax on Estimated Income + 4% Cess) minus TDS already paid
You estimate your gross income for the full year (business profit, FD interest, rental income, capital gains if any), subtract Chapter VI-A deductions if you are on the old regime, apply slab rates, tack on 4% Health and Education Cess, then knock off TDS already deducted. Cross Rs.10,000 and you owe advance tax.
The catch, and this is where most owners get stuck, is that you are predicting income that hasn’t happened yet. At Petpooja we notice retail owners typically take last year’s profit, add 10 to 15%, and file on that basis. Works well enough in a steady year. Doesn’t hold up when a single bumper quarter throws the math off and Section 234C interest starts accruing.
What Are the Due Dates and Instalment Percentages?
Four deadlines. Miss one, pay interest. No exceptions.
| Instalment | Due date | Cumulative % of net tax |
|---|---|---|
| 1st | 15 June | 15% |
| 2nd | 15 September | 45% |
| 3rd | 15 December | 75% |
| 4th | 15 March | 100% |
One carve-out worth knowing: businesses under presumptive taxation (Section 44AD/44ADA, turnover up to Rs.2 crore or Rs.3 crore if 95%+ receipts are digital) skip quarterly instalments entirely. They pay 100% by 15 March in a single challan.
What Does an Estimated Tax Calculation Look Like?
Priya Mehta runs a two-counter supermarket in Alkapuri, Vadodara. FY 2025-26, old regime. Her numbers:
| Item | Amount (Rs.) |
|---|---|
| Net business profit | 16,40,000 |
| FD interest | 42,300 |
| Gross total income | 16,82,300 |
| Less: Section 80C (PPF + LIC) | 1,50,000 |
| Net taxable income | 15,32,300 |
Tax comes to Rs.2,72,190 (nil up to Rs.2,50,000, then 5%, 20%, 30% on subsequent slabs). Add 4% cess of Rs.10,888. Subtract TDS on FD of Rs.4,230. Net advance tax payable: Rs.2,78,848.
| Instalment | Due date | Cumulative due | Payment this quarter |
|---|---|---|---|
| 1st | 15 June 2025 | Rs.41,827 | Rs.41,827 |
| 2nd | 15 Sept 2025 | Rs.1,25,482 | Rs.83,655 |
| 3rd | 15 Dec 2025 | Rs.2,09,136 | Rs.83,654 |
| 4th | 15 March 2026 | Rs.2,78,848 | Rs.69,712 |
Say Priya pays only Rs.30,000 by 15 June instead of Rs.41,827. Shortfall: Rs.11,827. That attracts 1% per month for three months under Section 234C, roughly Rs.355. Not a lot by itself, but it stacks.
Why Does Estimated Tax Matter for Indian Businesses?
Because Rs.355 four times over is just the 234C piece. Layer on Section 234B interest (1% per month from April 1 of the assessment year on total shortfall below 90% of liability), and a business owing Rs.2,78,848 in advance tax can end up paying Rs.8,000 to Rs.12,000 in avoidable interest by the time they file in July. On 6 to 8% net margins, that is a real dent.
Across 8,000+ Invoice clients, we see a clear split. Owners tracking monthly P&L digitally overshoot their estimates by 3 to 5% (safe side). Those still on manual registers undershoot by 15 to 20% and catch 234C notices after filing. Talk to your CA before the June 15 deadline, not after.
How Does Petpooja Invoice Help with Estimated Tax?
Petpooja Invoice keeps a live P&L on the dashboard that updates with every sale and purchase entry. When the advance tax due date is a week away, the owner or their CA pulls the quarterly profit figure directly, no reconstructing from paper bills or WhatsApp photos of purchase registers. The figures come off the invoices themselves, so nothing has to be retyped to arrive at them. Businesses already running GST compliance or GST registration through Invoice find the estimation part takes five minutes, not a weekend.
Frequently Asked Questions
Who has to pay estimated tax in India?
Any taxpayer, whether individual, HUF, firm, or company, whose tax liability after TDS exceeds Rs.10,000 for the financial year. Senior citizens (60+) with no business or professional income are exempt; they settle everything at filing time.
What happens if I miss an advance tax deadline?
Two penalties run in parallel. Section 234C charges 1% per month on the shortfall at each instalment date (three months for the first three, one month for the March one). Separately, Section 234B hits you with 1% per month if your total advance tax falls below 90% of the final assessed liability.
Can I pay all my advance tax in one instalment?
Only under presumptive taxation. Section 44AD covers businesses with turnover up to Rs.2 crore (Rs.3 crore if 95%+ digital receipts), and they pay 100% by 15 March in one challan. Everyone else follows the quarterly schedule.
Is GST advance payment the same as estimated tax?
Different obligation entirely. Estimated tax is income tax. GST is consumption tax. Under the QRMP scheme, businesses with turnover up to Rs.5 crore file quarterly but pay GST monthly via PMT-06.
Does advance tax apply under the new tax regime?
Same obligation, different slab rates. Under the new regime for FY 2025-26, the Section 87A rebate wipes out liability for income up to Rs.12 lakh, so advance tax bites only above that.