Income Details
Include Basic, HRA, and all allowances. (Before PF deduction).
E.g., Bank FD Interest, Rental Income.
Regime & Declarations
New regime ignores most deductions but has lower slabs.
Monthly TDS Deduction
₹0This amount is withheld from your salary every month by your employer.
Annual Salary Projection
Annual Tax Liability
Total Annual Tax ÷ 12 months = Monthly TDS.
Gross Monthly vs Take Home
Excluding PF/PT deductions, your post-tax monthly cashflow is:
How Employers Calculate TDS (Section 192)
Under Section 192 of the Income Tax Act, any employer paying a salary is legally mandated to deduct income tax at source (TDS) at the time of payment. The employer does not deduct a flat percentage; instead, they project your annual income, calculate the applicable tax slab, and divide the total tax by 12 months.
The Calculation Flow
| 1. Annual Projection | Monthly Salary × 12 = Projected Annual Salary. |
| 2. Subtract Exemptions | Standard Deduction (₹75,000 for New Regime / ₹50,000 for Old Regime) is removed. If you opted for the Old Regime, HRA and LTA exemptions based on your rent receipts and travel bills are also removed. |
| 3. Apply Deductions | If in Old Regime, Section 80C (PPF, ELSS) and 80D (Health Insurance) declarations are subtracted to find the Net Taxable Income. |
| 4. Tax & TDS | Tax is calculated on the Net Income based on the applicable slab. Cess of 4% is added. The total is divided by 12 to find your monthly TDS deduction. |
The "March TDS Shock"
At the start of the year (April), you make an "Investment Declaration" to your HR stating you will invest ₹1.5L in 80C. Your HR calculates your monthly TDS assuming you actually make this investment.
In Jan/Feb, you must submit actual proof (receipts) of these investments. If you failed to invest the promised amount, the HR recalculates your tax without the deduction. The sudden shortfall in tax collected is recovered entirely from your Feb/March salary, leading to a massive drop in your in-hand pay.
Frequently Asked Questions
1. What is Section 192 of the Income Tax Act?
2. How does the employer calculate monthly TDS?
3. What if I don't declare investments to my employer?
4. Is Standard Deduction available in the New Tax Regime?
5. Why is my TDS changing in March?
6. How do I choose between Old and New Regime for TDS?
7. Does this tool calculate PF and Professional Tax?
8. How do I get proof of my TDS deductions?
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Sections 234A/B/C.
Professional Tax
State-wise PT deduction.
Income Tax Calculator
Old vs New Regime.
Section 80C Calculator
Maximize 1.5L deduction.
Section 80D Calculator
Health insurance tax benefits.
TDS on Rent (194-IB)
TDS for tenants.
TDS on Property
Section 194-IA rules.
Section 44AD
Presumptive business tax.
Surcharge & Relief
Calculate marginal relief.
Capital Gains Exemption
Sections 54, 54F, 54EC.
Section 44AE
Transport presumptive tax.
House Property Tax
Section 24 deductions.
Future Value
Calculate FV of money.
CAGR Calculator
Compound annual growth.
SIP Calculator
Mutual fund investment.