NEW DELHI, India | September 6, 2026 —
Advance Tax Deadline September 15 is just days away, and salaried taxpayers who assume their employer’s TDS settles their entire income-tax liability could face an unpleasant surprise if they also earn substantial interest from fixed deposits, rent, dividends or other non-salary sources.
Under India’s advance-tax framework, eligible taxpayers must ensure that cumulative advance tax paid by September 15 reaches at least 45% of their estimated tax liability for the financial year.
The rule can affect salaried employees as well as professionals, investors, landlords and business owners.
The critical point is simple: TDS deducted by an employer covers tax calculated on salary. It may not fully cover tax arising from income earned elsewhere.
That difference can create an advance-tax liability.
Who Needs to Pay Advance Tax?
Advance tax generally applies when a taxpayer’s estimated tax liability for the financial year, after taking into account TDS, TCS and eligible tax credits, reaches ₹10,000 or more.
This means a person does not become liable merely because they earn interest, rent or dividends.
The key calculation is the remaining estimated tax payable after available tax credits.
For example, a salaried employee may already have tax deducted every month by an employer.
However, the same employee may also have:
- Fixed-deposit interest
- Savings or bond interest
- Rental income
- Dividend income
- Freelance income
- Consulting income
- Business income
- Other taxable receipts
If TDS on those additional earnings does not cover the final tax liability, advance tax may become payable.
September 15 Means 45% of Estimated Tax
The standard advance-tax schedule requires eligible taxpayers to pay tax progressively during the financial year.
The cumulative schedule is:
June 15: 15%
September 15: 45%
December 15: 75%
March 15: 100%
Therefore, September 15 is not a requirement to pay another 45% on top of the June instalment.
It means total advance tax paid up to that date should reach 45% of the estimated annual advance-tax liability.
This distinction matters when taxpayers calculate how much they still need to deposit.
Simple Advance Tax Example
Suppose a taxpayer estimates that, after accounting for all TDS and tax credits, the remaining advance-tax liability for the year will be ₹40,000.
By September 15, cumulative advance tax should generally reach:
45% of ₹40,000 = ₹18,000
If the taxpayer already paid ₹6,000 by June 15, an additional ₹12,000 would take the cumulative payment to ₹18,000.
Actual tax calculations can differ depending on income type, deductions, tax regime, capital gains and available credits.
Taxpayers should therefore calculate liability using their actual financial information rather than relying on a generic example.
Why Fixed Deposits Can Create a Tax Shortfall
Fixed deposits create one of the most common situations where taxpayers underestimate their final liability.
Banks may deduct TDS on FD interest when applicable.
However, the TDS rate and the individual’s final income-tax rate may not be the same.
A taxpayer in a higher tax bracket may ultimately owe more tax than the amount deducted by the bank.
Consider a person holding several fixed deposits across different banks.
Interest from all those deposits forms part of taxable income.
Even if every bank deducts some TDS, the taxpayer must still calculate the final tax due on the total interest income.
The difference can create an advance-tax obligation.
Salary TDS Does Not Automatically Cover FD Interest
An employer normally calculates TDS using salary information and other income disclosed by the employee.
If an employee does not report significant non-salary income to the employer, monthly salary TDS may not account for it.
That is where many taxpayers can run into trouble.
A large FD portfolio can generate substantial taxable interest.
Rental property can generate additional income.
Dividend payments, bond interest or freelance work can increase taxable income further.
The taxpayer must combine these income sources when estimating annual tax.
Rental Income Can Also Trigger Advance Tax
Landlords should pay particular attention.
Rental income can create additional tax liability even when tenants deduct TDS in applicable cases.
The final taxable rental income depends on relevant tax rules, deductions and the taxpayer’s overall income.
If the tax remaining after TDS exceeds the advance-tax threshold, instalment rules may apply.
Taxpayers with multiple properties or high rental receipts should therefore review their estimates before September 15.
What About Dividend Income?
Dividend income can also contribute to advance-tax liability.
Companies do not necessarily deduct enough tax to match every investor’s eventual tax rate.
An investor with substantial dividends should therefore include expected dividend income while calculating total annual tax.
Tax rules contain specific provisions dealing with income that cannot reasonably be predicted in advance.
However, once such income becomes known, taxpayers should account for it in subsequent advance-tax instalments according to applicable rules.
Capital Gains Need Special Attention
Capital gains deserve separate treatment because they can arise unexpectedly.
A taxpayer may sell shares, mutual funds, property or other capital assets during the financial year and suddenly generate a sizeable tax liability.
Income-tax rules recognize that some forms of income, including capital gains, may not be predictable at the start of the year.
Taxpayers should calculate the impact once the gain arises and adjust remaining advance-tax instalments accordingly.
Because capital-gains taxation can vary by asset type and holding period, professional advice may be useful in complex cases.
What Happens if You Miss the Advance Tax Instalment?
Failing to pay sufficient advance tax can lead to interest under the Income-tax Act.
Section 234C deals with deferment or short payment of advance-tax instalments.
Interest can generally apply at 1% per month on the relevant shortfall for the prescribed period, subject to the detailed conditions contained in the law.
This is why taxpayers should not assume they can simply wait until March and settle everything without consequence.
Even if the final tax gets paid later, interest triggered by delayed instalments may still apply.
Section 234B Can Also Become Relevant
Another provision, Section 234B, may apply where a taxpayer does not pay sufficient advance tax during the financial year.
Sections 234B and 234C address different types of advance-tax defaults.
For taxpayers, the practical lesson is straightforward:
Estimate income periodically.
Subtract TDS and eligible credits.
Check whether advance tax remains payable.
Do not wait until the return-filing season to discover a large shortfall.
Important Exception for Senior Citizens
There is an important exemption for certain senior citizens.
A resident individual aged 60 years or above who does not have income from business or profession is generally not required to pay advance tax.
This exception can be particularly relevant for retired individuals whose income comes mainly from pensions, fixed deposits, interest or investments.
However, a senior citizen who earns business or professional income may not qualify for this exemption.
Presumptive Taxpayers Follow Different Schedule
Eligible taxpayers using presumptive taxation under Sections 44AD or 44ADA follow a different instalment structure.
Instead of the standard June-September-December-March schedule, they can generally pay 100% of their advance-tax liability by March 15.
Business owners and professionals should therefore first identify which tax framework applies to them before calculating a September instalment.
How to Check Whether You Need to Pay
Taxpayers can use a simple checklist before September 15.
Start with estimated total income for the full financial year.
Include salary and all significant non-salary income.
Then estimate the total income-tax liability under the applicable tax regime.
Subtract:
- TDS
- TCS
- Eligible tax credits
- Applicable reliefs
If the remaining estimated tax liability reaches the advance-tax threshold, calculate the appropriate instalment.
The estimate can be revised later if income changes.
Income Can Change During the Year
Advance tax is based on estimated annual income.
That means taxpayers are not expected to predict every rupee perfectly in June.
If income rises or falls later, the advance-tax estimate can be revised in subsequent instalments.
For instance, a taxpayer may receive a bonus, sell an investment, start earning rent or create a new FD during the year.
The next instalment can reflect the revised estimate.
This makes advance tax a dynamic system rather than a one-time annual calculation.
Do Not Ignore Interest From Multiple Bank Accounts
Taxpayers should consolidate interest income across banks.
Looking at only one FD account can produce an incomplete tax estimate.
Interest may come from:
- Fixed deposits
- Recurring deposits
- Savings accounts
- Bonds
- Corporate deposits
- Other interest-bearing investments
TDS visible in Form 26AS or the Annual Information Statement can help taxpayers compare taxes already deducted with actual income received or accrued.
Check AIS and Form 26AS
Before calculating advance tax, taxpayers should review available tax records.
The Annual Information Statement, or AIS, can show reported financial transactions and income information.
Form 26AS provides details of tax deducted or collected and other tax-related entries.
These records can help identify income or TDS that might otherwise be overlooked.
However, taxpayers remain responsible for reporting their correct income even if a transaction does not yet appear in AIS or Form 26AS.
How Advance Tax Can Be Paid
Advance tax can be paid electronically through the Income Tax Department’s tax-payment system.
Taxpayers generally select the appropriate income-tax payment option, assessment year and payment category before completing the transaction through an available banking method.
After payment, the challan details should be saved.
Taxpayers should also verify that the payment appears correctly in their tax records.
Incorrect assessment-year selection can create avoidable complications later.
September 15 Is a Deadline Worth Checking Now
The biggest mistake is assuming advance tax only concerns businesses.
It can affect anyone whose tax on additional income is not fully covered through TDS.
That includes salaried professionals with large fixed deposits.
It includes landlords.
It includes investors.
It can include people with freelance or consulting income alongside a regular job.
With the September 15 advance-tax deadline approaching, taxpayers have an opportunity to review their income before interest becomes an issue.
The calculation does not need to begin with tax forms.
It begins with one basic question:
After all TDS and tax credits, will you still owe ₹10,000 or more in tax this financial year?
If the answer could be yes, September 15 deserves attention.
Quick Guide
September 15 Requirement: Cumulative 45% of estimated advance tax
Advance Tax Threshold: Estimated net tax liability of ₹10,000 or more
June 15: 15%
September 15: 45%
December 15: 75%
March 15: 100%
Late/Short Instalment: Section 234C interest may apply
Senior Citizen Exception: Resident age 60+ without business/professional income
Presumptive Taxpayers: Generally 100% by March 15 under Sections 44AD/44ADA
