1. What is TDS on salary?
TDS (Tax Deducted at Source) is the income tax your employer deducts from your monthly salary and pays to the government on your behalf. It's not a separate tax — it's your income tax paid in monthly instalments.
Monthly TDS = Estimated Annual Tax ÷ 12
At the end of the year, your actual tax liability is computed on your income tax return. If TDS deducted is more than your liability, you get a refund. If it's less, you pay the difference.
2. How your employer calculates TDS
Your employer follows this process at the start of each financial year:
- Projects your annual gross salary (based on your CTC).
- Subtracts the standard deduction (₹75K new / ₹50K old).
- Subtracts the exemptions and deductions you declare (HRA, 80C, 80D, home loan interest, etc.) — under the old regime.
- Arrives at taxable income.
- Applies the applicable slab rates (based on your regime choice).
- Adds surcharge (if applicable) and cess.
- Divides the annual tax by 12 to compute monthly TDS.
💡 If you declare investments mid-year, your employer recalculates TDS for the remaining months. The earlier in the year you declare, the smoother your monthly take-home.
3. Standard deduction — the automatic benefit
Every salaried employee gets a standard deduction with no proof required:
| Regime | Standard deduction |
|---|---|
| New regime | ₹75,000 |
| Old regime | ₹50,000 |
The new regime's higher standard deduction is one reason it often wins for taxpayers with few other deductions.
4. HRA exemption (old regime only)
If you receive HRA and pay rent, the exempt portion is the least of:
- Actual HRA received
- 50% of basic (metro) or 40% of basic (non-metro)
- Actual rent paid − 10% of basic
The exempt amount is subtracted from your gross salary before tax. The remaining HRA is taxable as salary. This is one of the most valuable deductions under the old regime — often worth ₹1–3 lakh in exemption.
5. A worked example
Salary structure: Basic ₹6,00,000, HRA ₹3,00,000, Special allowance ₹5,00,000. Gross ₹14,00,000.
| Item | New regime | Old regime |
|---|---|---|
| Gross salary | ₹14,00,000 | ₹14,00,000 |
| Std. deduction | ₹75,000 | ₹50,000 |
| HRA exemption (rent ₹2.4L, non-metro) | — | ₹1,80,000 |
| 80C (incl. EPF) | — | ₹1,50,000 |
| 80D | — | ₹25,000 |
| Taxable income | ₹13,25,000 | ₹9,95,000 |
| Slab tax | ₹1,18,750 | ₹1,48,500 |
| Cess (4%) | ₹4,750 | ₹5,940 |
| Total tax | ₹1,23,500 | ₹1,54,440 |
In this example, the new regime saves about ₹30,940 — despite the old regime having ₹3.55L of deductions. Why? Because the new regime's lower slab rates and higher standard deduction outweigh the old regime's deductions for this income level.
⚠️ The break-even is not simply about total deductions. You must compare the actual tax under both regimes. For most salaried taxpayers with income under ₹15L and deductions under ₹5L, the new regime wins.
6. How to reduce your salary tax
- Choose the right regime: Compare both with your actual numbers. The wrong choice can cost ₹20K–₹50K per year.
- Maximise HRA (old regime): If you pay rent, submit receipts to claim HRA exemption.
- Use employer NPS (both regimes): Employer contribution up to 10% of basic is deductible under both regimes.
- Restructure CTC: Request tax-free components like LTA, meal cards, telephone reimbursement (old regime).
- Declare investments early: Submit 80C, 80D proofs in April–May so your monthly TDS is right from the start.
- Use NPS 80CCD(1B): Extra ₹50,000 deduction over and above 80C (old regime).
- Claim home loan interest: Up to ₹2L per year under Section 24(b) (old regime, self-occupied).
7. Common mistakes
- Not declaring investments: Your employer deducts higher TDS, and you claim a refund only after filing. You lose cash flow for months.
- Over-declaring: Declaring ₹1.5L of 80C but investing only ₹50K means a tax shortfall at year-end. Pay it before March 31 or face interest.
- Choosing the wrong regime: Many people stick with the new regime's default without comparing. Some lose ₹30K+ because the old regime would have saved more.
- Forgetting other income: Interest, dividends, and capital gains are taxable but not part of salary TDS. You'll owe tax at filing.
- Ignoring HRA: If you pay rent and are in the old regime, HRA exemption is worth ₹1–3L. Don't skip the paperwork.
- Not switching jobs mid-year carefully: Two employers each compute TDS independently, often resulting in tax shortfall. Consolidate your income and recompute at filing.
8. Final thoughts
Salary tax is one of the biggest financial line items for most working Indians. Understanding how TDS is computed, which regime saves more, and which deductions you can claim puts real money back in your pocket.
Use this calculator at the start of every financial year to plan your declarations and TDS. Re-run it after a raise or a CTC restructuring. Review at filing time to confirm your TDS was accurate and claim any refund you're owed.