India Payroll Tax Guide 2026–27Salary TDS Monthly Deduction Calculator

What Is Salary TDS And Why Is It Deducted Monthly?

Tax deducted at source, commonly called TDS, is a system through which an employer withholds income tax from salary payments and deposits the amount with the government. Salary withholding generally falls under Section 192 of the Income-tax Act framework applicable to the relevant tax year. It is an advance collection of your income tax rather than an additional tax.

Employers normally estimate taxable salary for the full financial year before determining withholding. They consider salary components, eligible declarations, applicable tax rules and information about other income or earlier employment when properly provided. The estimate can change as payroll receives new information.

The Salary TDS Monthly Deduction Calculator provides a simplified version of this annual estimation process. It does not assume that every salary payment must have the same deduction. Instead, it calculates the outstanding tax balance and spreads that amount across the months you enter.

Salary TDS versus other payslip deductions

Income-tax withholding is different from provident fund, professional tax, employee insurance and other payroll deductions. Provident fund generally contributes toward retirement savings, while professional tax is a separate state-level levy where applicable. Neither is automatically interchangeable with income-tax TDS.

To understand the full difference between gross salary and money received in your bank, use the salary after PF and tax calculator. You can also compare individual deductions using the payslip deduction breakdown tool.

Why annual salary matters more than one month's pay

Monthly withholding depends on the annual income projection. An employee receiving a one-time bonus may face higher TDS during the bonus month because the projected annual tax increases. Conversely, a corrected investment declaration or excess withholding earlier in the year can reduce later deductions.

The Salary TDS Monthly Deduction Calculator is especially useful when reviewing a payslip after a salary increment, bonus announcement, tax-regime declaration or job change. It gives you a transparent estimate to compare with your employer's calculation.

How To Use Salary TDS Monthly Deduction Calculator

Begin with your projected annual gross salary rather than the employer's total cost to company. CTC may include employer contributions, insurance and other benefits that are not ordinary cash salary. If you only know CTC, first use the CTC to in-hand salary calculator to understand the difference.

1. Enter annual salary. Include projected fixed salary and taxable bonuses expected during the financial year.
2. Select a tax regime. Choose new, old or the lower estimated tax for comparison.
3. Enter other ordinary income. Include relevant declared income subject to the normal slab rates.
4. Specify remaining payroll months. Enter a number from one to twelve.
5. Add tax already deducted. Include salary TDS withheld earlier in the financial year.
6. Enter eligible deductions. Under the old regime, use verified exemptions and allowable deductions.
7. Calculate and review. Compare the estimated monthly withholding, annual tax and remaining balance.

Example: Salary TDS with tax already deducted

Assume annual gross salary of ₹18,00,000 under the new regime. After the illustrative ₹75,000 standard deduction, taxable income is ₹17,25,000. Applying the relevant slabs produces ₹1,45,000 before cess, giving estimated annual tax of ₹1,50,800 after 4% cess.

If ₹50,000 has already been withheld and six months remain, the outstanding liability is ₹1,00,800. The estimated monthly deduction becomes ₹16,800. Without previous withholding, an even twelve-month distribution would be approximately ₹12,567 per month.

What happens when the remaining tax is zero?

If confirmed withholding and credits equal or exceed estimated annual tax, the calculator displays zero further TDS. It does not show a negative monthly deduction or promise that your employer will refund excess withholding through salary. Any final refund or balance payable is determined through the applicable tax reconciliation process.

Old Versus New Tax Regime For Monthly Salary TDS

India's old and new income-tax regimes can produce different withholding amounts even when annual gross salary is identical. The difference arises from tax slabs, standard deductions, exemptions, eligible investments and rebate provisions. The regime selected for payroll affects the employer's withholding estimate.

The new regime generally offers revised slabs and a higher standard deduction for eligible salaried individuals. The old regime retains several exemptions and deductions subject to conditions. The right comparison uses actual eligible claims rather than assumed deductions that may not be available to you.

New-regime salary TDS

For FY 2026–27, the calculator models the new-regime slabs beginning with a zero-rate band up to ₹4 lakh. It also applies the ₹75,000 salaried standard deduction and simplified Section 87A rebate rules for eligible resident individuals with ordinary income.

Under the qualifying conditions, ordinary taxable income up to ₹12 lakh may benefit from the rebate. This does not mean that every employee with ₹12 lakh CTC automatically has zero tax. CTC, gross salary and taxable income are different concepts, and special-rate income can affect the final result.

Old-regime salary TDS

The old regime uses a different progressive slab structure and generally permits eligible deductions such as specified savings, insurance payments and qualifying HRA exemption. The calculator accepts a combined deduction amount, but users must apply individual statutory limits before entering it.

The Salary TDS Monthly Deduction Calculator includes a ₹50,000 standard deduction for the old regime in its simplified model. It also applies the basic Section 87A rebate for eligible resident individuals where taxable income does not exceed the applicable threshold.

Use the tax regime savings comparison calculator for additional planning. The HRA exemption guide and standard deduction calculator explain two common adjustments in greater detail.

Why Monthly Salary TDS Changes During The Year

Employees sometimes expect their income-tax deduction to remain unchanged from April through March. In practice, an employer may revise monthly TDS when estimated annual taxable income changes. This is why two payslips from the same financial year can show different tax amounts.

1. Salary increments and bonuses

An increment increases projected annual income for the remaining part of the financial year. A performance bonus can have a similar effect, particularly if it moves taxable income into a higher slab. Progressive tax rates apply to the relevant portions of taxable income, not automatically to the entire salary.

2. Previous employer income

Employees changing jobs may need to provide details of salary and tax deducted by the previous employer. If earlier income is excluded from the current employer's projection, withholding may be too low. Review your previous Form 16 or available payroll records before estimating the combined annual liability.

3. Investment declarations and exemptions

Under the old regime, payroll may initially use provisional declarations and later request supporting evidence. If the employer rejects an unsupported claim, taxable income can rise and remaining-month TDS can increase. Enter only deductions and exemptions that you are eligible to claim.

4. Tax already paid or deducted

The Salary TDS Monthly Deduction Calculator separates annual liability from the amount still outstanding. This matters when salary TDS has already been collected or when other eligible tax credits are available. Enter confirmed credits only; speculative credits can understate the remaining tax.

5. Fewer remaining salary months

A shorter collection period can increase each month's deduction without changing the annual tax itself. For example, a remaining balance of ₹60,000 spread over ten months is ₹6,000 monthly. Spread over three months, it becomes ₹20,000 monthly.

When investigating a deduction mismatch, compare your result with the monthly salary slip calculator and your employer's payroll statement. These tools answer related but different questions: one estimates tax withholding, while the other helps explain payslip components.

Common Mistakes In Salary TDS Calculations

The most common mistake is entering CTC as taxable salary. Employer provident fund, insurance and other employer-funded benefits can make CTC different from salary income. Using an inflated starting figure can produce an inflated tax estimate.

Another error is dividing annual tax by twelve even after several months have passed. Payroll may need to deduct only the remaining balance, so previously withheld tax and remaining salary months are important. The Salary TDS Monthly Deduction Calculator handles these inputs separately.

Employees also sometimes subtract employee PF directly from taxable income under the new regime. Ordinary employee 80C deductions are generally not available under that regime. Under the old regime, eligible employee contributions may qualify within the applicable deduction limits.

Do not assume that HRA exemption equals the full HRA allowance. The actual exemption depends on the statutory calculation and eligible circumstances. Similarly, not every insurance payment, investment or reimbursement qualifies for the deduction someone expects.

Finally, remember that salary withholding is only one part of tax compliance. Income from investments, capital gains, property and other sources can affect your return. Some income is taxed under special provisions that this simplified salary estimator does not model.

For year-end reconciliation, consult the Form 16 tax calculation guide. Form 16, AIS and Form 26AS can help identify reported income and tax credits, subject to their availability and accuracy.