Advance Tax for Small Businesses: Meaning, Due Dates, and Calculation Basics
Many small business owners think income tax is something to handle only after the financial year ends. They wait for the return filing time, calculate the final tax, and then pay whatever is due.
But income tax does not always wait until the return filing deadline. If your business earns taxable income during the year, you may need to pay a part of your income tax in advance. This is called advance tax.
Quick summary
- Advance tax is income tax paid during the financial year instead of paying the full amount at the time of filing the return.
- It usually applies when your estimated tax liability for the year is ₹10,000 or more after reducing TDS and TCS.
- Regular taxpayers generally follow four due dates: 15th June, 15th September, 15th December, and 15th March.
- Businesses and professionals under Section 44AD and Section 44ADA can pay 100% of advance tax by 15th March.
- If you miss the required payment or pay too little, interest may apply under Sections 234B and 234C.
- Advance tax can be paid through the e-Pay Tax option on the Income Tax portal.
For a small business owner, this matters because business income is not fixed like a salary. Some months may be strong, some may be slow, and tax may not be deducted from every business payment you receive. If you wait until the return filing time, you may have to pay a large amount at once, along with interest for the delay.
This guide explains advance tax in simple terms: what it means, who needs to pay it, the due dates, how to calculate it, and how to avoid common mistakes.
What Is Advance Tax?
Advance tax means paying your income tax in parts during the same financial year in which you earn the income. It is also called “pay as you earn” tax.
For example, if your business is likely to earn taxable profit during FY 2026-27, you should not always wait until return filing time in 2027 to pay the full tax. If advance tax applies to you, you need to pay it in installments during FY 2026-27 itself. Advance tax is not an extra tax. It is the same income tax, only paid earlier in parts.
Why Advance Tax Matters for Small Businesses
For a new or growing business, cash flow may already be tight. Rent, salaries, stock purchases, vendor payments, loan EMIs, and GST payments may all compete for the same cash. If you ignore advance tax, you may face a large tax payment at the time of filing your income tax return, along with interest for not paying tax on time.
This can disturb your cash flow, especially if the payment comes during a slow business month. Paying advance tax on time helps you spread the tax burden across the year and keeps your business accounts cleaner, so tax does not become a sudden year-end burden.
Who Needs to Pay Advance Tax?
To check whether advance tax applies, first estimate your income tax for the full financial year. Then reduce taxes that have already been deducted or collected against your PAN. TDS means Tax Deducted at Source. For example, a client may deduct TDS before paying professional fees, or a bank may deduct TDS on FD interest.
TCS means Tax Collected at Source. It applies in specific transactions where tax is collected by the seller or collector and reported against your PAN. If the balance tax payable after reducing TDS and TCS is ₹10,000 or more, advance tax usually applies.
| Taxpayer Type | Advance Tax Applicability |
|---|---|
| Sole proprietors | Usually applies if the balance tax payable crosses the advance tax limit |
| Freelancers and self-employed professionals | Usually applies if enough tax is not already deducted from their income |
| Partnership firms, LLPs, and private limited companies | Usually applies based on estimated tax payable |
| Individuals with salary and business income | May apply if salary TDS does not cover the tax on total income |
| Partners receiving taxable salary, interest, or remuneration from a firm | May apply if their balance tax payable crosses the limit |
| Taxpayers whose balance tax payable is below ₹10,000 | Advance tax is not required |
| Resident senior citizens aged 60 years or above with no business or professional income | Advance tax is not required |
| Resident senior citizens with business or professional income | May apply if their balance tax payable crosses the limit |
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Advance Tax Due Dates
For most taxpayers, advance tax is paid in four instalments. These percentages are cumulative:
| Due Date | Cumulative Tax to Be Paid |
|---|---|
| 15th June | At least 15% of total estimated tax |
| 15th September | At least 45% of total estimated tax |
| 15th December | At least 75% of total estimated tax |
| 15th March | 100% of total estimated tax |
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For example, by 15th September, you should have paid 45% in total. This includes the amount already paid by 15th June. You do not pay 15% plus 45% separately. You only make up the difference.
Special Rule for Presumptive Taxpayers
Some small businesses and professionals use the Presumptive Taxation Scheme. This scheme allows eligible taxpayers to calculate income at a fixed percentage of turnover or receipts, rather than maintaining detailed profit calculations in a normal way.
If you have opted for presumptive taxation under Section 44AD or Section 44ADA, you need to pay 100% of your advance tax by 15th March. You do not need to pay separate June, September, and December installments for income covered under these sections, provided the scheme applies to you.
Section 44AD and Section 44ADA: Basic Eligibility
Section 44AD applies to eligible small businesses. Under Section 44AD, income is generally estimated at 8% of turnover. For eligible digital receipts, the estimate may be 6%. The turnover limit is:
| Scheme | Limit |
|---|---|
| Section 44AD | Up to ₹3 crore if cash receipts and receipts through non-prescribed modes do not exceed 5% of total receipts |
| Section 44AD | Up to ₹2 crore otherwise |
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Section 44ADA applies to specified professionals such as doctors, lawyers, engineers, architects, accountants, technical consultants, interior decorators, and other notified professionals.
| Scheme | Limit |
|---|---|
| Section 44ADA | Up to ₹75 lakh if cash receipts and receipts through non-prescribed modes do not exceed 5% of total receipts |
| Section 44ADA | Up to ₹50 lakh otherwise |
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Under Section 44ADA, income is generally estimated at 50% of gross receipts. These schemes have conditions, so do not assume eligibility based solely on turnover. If you are unsure, check with a CA before choosing the scheme.
How to Calculate Advance Tax
Advance tax calculation starts with one basic idea: estimate your full-year tax and pay it in parts. You do not need a perfect number at the start of the year, but your estimate should be reasonable and updated before each due date.
Step 1: Estimate Your Total Income for the Year
Start by estimating your income from all sources for the full financial year. This may include business profit, professional income, salary income, rental income, interest from savings accounts or FDs, capital gains, and any other taxable income.
For business owners, the important point is to use profit, not just sales. Sales and taxable profit are not the same thing. Your taxable business income is usually calculated after reducing eligible business expenses.
Step 2: Reduce Eligible Deductions
After estimating your income, reduce the deductions you are eligible to claim under the tax regime you choose. These may include eligible investments, insurance premiums, loan interest, or other allowable deductions.
India has two tax regime options for individuals: the old tax regime and the new tax regime. The old tax regime allows several deductions and exemptions, while the new tax regime usually offers lower tax rates but allows fewer deductions. The new tax regime is the default, but some taxpayers may choose the old tax regime if it results in a lower tax amount.
Step 3: Apply the Correct Tax Rate
Next, apply the income tax rate that applies to you. For individuals and sole proprietors, tax is calculated using slab rates, which means different portions of income are taxed at different rates. For partnership firms, LLPs, and companies, tax is calculated differently.
At this stage, also consider cess and surcharge, if applicable. Cess is an additional charge collected for specific government purposes, such as health and education. A surcharge is an additional tax charged when income exceeds certain higher-income thresholds.
Since slab rates, cess, surcharge, and rebate rules can change, check the current tax rates on the Income Tax portal or ask your CA before making the final calculation.
Step 4: Reduce TDS and TCS
After calculating your estimated tax, reduce the TDS and TCS already deducted or expected to be deducted during the year. For example, a client may deduct TDS on professional fees, a bank may deduct TDS on FD interest, or a buyer or platform may collect or deduct tax in certain cases. If the final amount crosses the advance tax limit, you may need to pay advance tax.
The basic formula is: Estimated advance tax = Estimated total tax - TDS and TCS already deducted or expected to be deducted
Step 5: Pay as Per the Due Date
Once you know your estimated advance tax, pay the required percentage by each due date. If your income changes later, you can adjust the estimate in the next installment.
Estimating advance tax becomes easier when your billing records are updated. With mazu, you can keep invoices and payment details organised, so you have a clearer view of your business income before each advance tax due date.
A Simple Advance Tax Calculation Example
Suppose Rohan runs a small trading business. He estimates the following for the year:
| Particulars | Amount |
|---|---|
| Estimated business profit | ₹8,00,000 |
| Interest income | ₹40,000 |
| Total estimated income before deductions | ₹8,40,000 |
| Estimated deductions | ₹50,000 |
| Estimated taxable income | ₹7,90,000 |
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Now assume his estimated income tax, including cess, comes to ₹45,000. His bank has already deducted TDS of ₹5,000 on interest income. So his net advance tax liability is:
| Particulars | Amount |
|---|---|
| Estimated tax | ₹45,000 |
| Less: TDS | ₹5,000 |
| Net advance tax liability | ₹40,000 |
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Since ₹40,000 crosses the advance tax limit, Rohan needs to pay advance tax. His installments may look like this:
| Due Date | Cumulative Amount Required | Additional Amount to Pay |
|---|---|---|
| 15th June | ₹6,000 | ₹6,000 |
| 15th September | ₹18,000 | ₹12,000 |
| 15th December | ₹30,000 | ₹12,000 |
| 15th March | ₹40,000 | ₹10,000 |
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This example uses assumed tax figures to explain the method. In a real case, the tax amount must be calculated using the correct slab rates, deductions, regime, cess, and other applicable rules.
What If Your Income Changes During the Year?
Business income can change during the year. A large order may come suddenly, a customer payment may get delayed, or sales may drop in a slow month. That is why advance tax is based on estimates, not on a fixed number set at the start of the year.
You can update your estimate before each due date. If income increases, pay more in the next installment. If income reduces, adjust the next payment accordingly. The goal is not to make a perfect estimate at the start, but to keep it reasonable and updated.
What Happens If You Do Not Pay Advance Tax?
If you do not pay advance tax on time, or if you pay less than required, interest may apply. Two sections are commonly involved: Section 234B and Section 234C.
Section 234B: Interest for Not Paying Enough Advance Tax
Section 234B may apply if you were required to pay advance tax but did not pay it, or if you paid less than 90% of your assessed tax by the end of the financial year. In such cases, interest is generally charged at 1% per month, or part of a month, on the shortfall.
In simple words, if your final tax liability is much higher than the tax you paid during the year, you may have to pay interest when filing your return.
Section 234C: Interest for Delay in Installments
Section 234C may apply when you delay or underpay advance tax installments. For interest calculation, the Income Tax Department gives some relief for the first two installments. Interest generally applies if you have paid less than 12% of your tax by 15th June, less than 36% by 15th September, less than 75% by 15th December, or less than 100% by 15th March. For taxpayers under Section 44AD and Section 44ADA, interest may apply if 100% of advance tax is not paid by 15th March.
For most small businesses, the simple rule is to follow the advance tax due dates and keep your estimate updated. If there is a shortfall, your CA or tax utility can calculate the exact amount of interest due at the time of filing.
How to Pay Advance Tax Online
Advance tax can be paid through the e-Pay Tax service on the Income Tax portal. Keep your PAN, estimated tax amount, and payment details ready before you start.
Step 1: Open e-Pay Tax
Go to the Income Tax portal and select e-Pay Tax. You may be able to make the payment before login or after login, depending on the portal flow available to you.
Step 2: Enter Taxpayer and Payment Details
Enter the required taxpayer details and select the correct tax category, year, and payment type as shown on the portal.
Step 3: Choose Advance Tax
Select Advance Tax as the payment type. The minor head for advance tax is 100. Avoid selecting Self-Assessment Tax if you are paying tax during the financial year.
Step 4: Pay and Save the Challan
Enter the tax amount and complete the payment through the available options. After payment, save the challan receipt. You may need the BSR code, challan serial number, payment date, and amount while filing your income tax return.
Common Mistakes Small Businesses Should Avoid
Mistake 1: Confusing GST With Income Tax
GST and income tax are different. Advance tax is related to income tax, not GST. GST is usually paid on sales or outward supply after adjusting eligible input tax credit. Income tax is paid on taxable income or profit. Do not assume that paying GST means your income tax is also covered.
Mistake 2: Looking Only at Sales
High sales do not always mean high profit. A business may have high turnover but low margins. Advance tax should be estimated on taxable income, not just revenue. Always consider expenses, deductions, depreciation, and other allowed adjustments.
Mistake 3: Ignoring TDS
Always check Form 26AS and AIS before estimating advance tax. But do not blindly assume that all TDS has been deposited correctly. Sometimes there may be a delay or mismatch, so check before relying on it.
Mistake 4: Waiting Until March
If you are not under Section 44AD or Section 44ADA, paying everything in March may still attract interest for earlier missed instalments. March payment is not a replacement for the June, September, and December due dates.
Mistake 5: Not Revising Estimates
Your June estimate may not be accurate by December. That is normal. What matters is that you revise the calculation as your income becomes clearer. This is especially important for businesses with seasonal sales, large orders, or delayed customer payments.
Conclusion
Advance tax is income tax paid during the year, rather than only at the time of filing the return. For small businesses, it matters because income is often uneven and TDS may not cover the full tax liability.
Regular taxpayers generally follow four due dates: 15th June, 15th September, 15th December, and 15th March. Taxpayers under Section 44AD and Section 44ADA get a simpler rule and can pay 100% by 15th March.
To avoid stress, keep your records up to date, check TDS, revise your estimate before each due date, and pay on time. A little planning during the year can prevent a large tax payment and avoidable interest later.