TDS on Salary Explained: How Tax Is Deducted From Your Salary

What TDS on salary means

TDS stands for tax deducted at source. Instead of waiting for an employee to pay the whole year's income tax after the financial year ends, the employer withholds part of the estimated tax from salary during the year and deposits it with the government. The amount is linked to the employee's PAN and becomes a tax credit, not a separate charge on top of income tax.

The employer is the deductor and the employee is the taxpayer. Payroll handles the deduction and deposit, but the income and final tax liability still belong to the employee. This distinction matters because an employer can only work with the salary records and declarations available to it; it may not know about every bank-interest receipt, freelance payment, capital gain or deduction that affects the employee's final return.

Salary TDS is therefore a collection mechanism based on an annual estimate. It is not a final assessment by itself, and the amount deducted in one month does not reveal the tax rate on that month's salary in isolation.

Why employers deduct TDS

Employers are required to estimate taxable salary and deduct tax when the applicable conditions are met. Collecting tax through payroll makes payments more regular for the employee and reduces the risk of one large year-end bill. The employer deposits what it withholds and later provides salary and deduction information through the prescribed records.

That obligation does not mean every employee must have the same percentage withheld. Tax depends on annual taxable income, the chosen regime, eligible deductions or exemptions, other income disclosed to payroll, and tax already paid or deducted. Two people with the same gross salary can consequently have different monthly TDS.

• The employer estimates income for the full financial year, not one payslip at a time.
• The estimate considers the tax regime and declarations supported under the applicable rules.
• Tax already deducted is subtracted before the balance is spread over the remaining salary payments.
• The employee must still check the final return using complete income and tax-credit records.

How salary TDS works step by step

Payroll begins with expected taxable salary for the financial year. That commonly includes fixed salary and taxable allowances, plus known bonus or variable pay. Eligible exemptions, deductions and the standard deduction are then considered according to the employee's chosen tax regime and the evidence or declarations the employer is permitted to accept.

The employer estimates annual income tax under the rules for that financial year, including applicable additions such as cess. It then reduces this figure by TDS already deducted and divides the remaining estimated tax across the salary payments still due. If the estimate changes later, the amount per remaining month changes too.

CalPaisa's Income Tax Calculator is configured for FY 2026–27 and earlier available years and can help estimate the annual liability behind payroll withholding. The separate TDS Calculator lets you test a known payment amount, rate and threshold; it does not choose the salary-tax rate or reproduce an employer's full payroll process.

Why monthly TDS can change

A steady monthly deduction is convenient, but it is not guaranteed. Payroll revises the annual estimate when new information changes expected taxable income or the tax relief it can consider. A performance bonus can increase estimated income; accepted rent or investment proofs can reduce taxable income under the relevant regime; a salary revision, job change or correction to an earlier payslip can alter the remaining balance.

Timing magnifies the effect. If a change is recorded early, the adjustment can be spread across many months. If it is recorded near the end of the financial year, the same correction is divided across only a few salary payments. This is why a large February or March deduction can arise even when the employee's fixed salary has not changed.

• A bonus, incentive, arrears or salary increase raises expected annual income.
• Investment, rent or other proofs can change deductions and exemptions where permitted.
• Joining or leaving during the year changes the salary and prior-TDS information available to payroll.
• Other income voluntarily reported to the employer can increase the annual estimate.
• A payroll correction late in the year leaves fewer months over which to adjust.

A simple hypothetical salary TDS example

Assume payroll estimates an employee's total income tax for the year at ₹96,000 after considering the information available. These figures are hypothetical and do not represent a current slab, threshold or tax rate. If the estimate is made at the beginning of a twelve-month payroll year, an even deduction would be ₹8,000 a month.

Now assume the employee receives an unexpected bonus halfway through the year and payroll revises estimated annual tax to ₹1,32,000. If ₹48,000 has already been deducted in the first six months, ₹84,000 remains. Spread over six months, the revised deduction becomes ₹14,000 a month. The increase is an adjustment to the annual estimate, not a special tax rate on ordinary salary.

If accepted proofs later reduce the estimated annual liability to ₹1,20,000 after ₹90,000 has already been withheld, only ₹30,000 remains to be deducted. Payroll can reduce the deductions across the remaining months. Actual payroll treatment depends on timing, employer processes and the tax rules in force.

What your salary slip and Form 16 show

A salary slip normally shows the month's earnings and deductions, including the TDS withheld for that pay period. It is useful for checking cash flow, but it is only one piece of the annual picture. Compare it with year-to-date salary and TDS figures rather than judging the whole year from one month.

Form 16 is the employer's annual certificate for salary and tax deducted. Conceptually, it records salary details, the calculation considered by the employer and the TDS deposited for the employee. It helps prepare the income-tax return, but it should be reconciled with the employee's complete income and tax-credit records because Form 16 cannot automatically cover income the employer did not know about.

Keep payslips, Form 16 and relevant proof records together. A mismatch between tax shown as deducted and tax appearing in official tax-credit records should be raised with payroll before filing rather than corrected by guessing in the return.

What happens if too much tax is deducted

Excess TDS does not disappear. When the income-tax return is prepared, final liability is calculated using complete income, deductions, exemptions and taxes already paid for the relevant year. If valid tax credits exceed that liability, the return can claim the difference as a refund, subject to processing and verification by the tax authority.

A refund can arise because payroll did not receive proofs in time, because income was lower than first estimated, because tax was deducted by more than one payer, or because a job change caused incomplete information. The opposite can also happen: if other income was omitted from payroll's estimate, TDS may be less than final liability and additional tax may be payable.

Do not treat a refund as a bonus or assume that a high TDS figure proves the return is complete. It is simply the reconciliation between estimated tax collected during the year and final tax calculated after the year.

Practical checks before the financial year ends

Review the regime and declarations recorded by payroll, compare year-to-date TDS with an independent annual-tax estimate, and check whether bonuses or other disclosed income have been included. If you claim HRA under the applicable regime, the HRA Exemption Guide explains the calculation; the New vs Old Regime Guide explains why the same deductions do not work identically in both regimes.

For the wider salary picture, use the CTC to In-Hand Salary Calculator to see how TDS sits alongside employee PF and other deductions. The EPF Calculator and Gratuity Calculator cover retirement-linked salary components that affect CTC but are not themselves salary TDS.

Near the end of the year, use the Income Tax Calculator for FY 2026–27 or the appropriate available year, then compare the result with tax already deducted. Use the TDS Calculator again only where you already know the applicable rate, threshold and deduction basis. Complex income, special-rate gains or uncertain claims should be checked with official guidance or a qualified tax professional.