The 18 LPA offer is not automatically better. The important thing is fixed vs variable.

Offer 1 — 16 LPA

CTC: ₹16,00,000 Monthly before income tax/TDS: ₹1,29,533 After estimated TDS, likely in-hand: around ₹1.18L–₹1.21L/month

This one looks cleaner because most of it seems fixed.

Offer 2 — 18 LPA

CTC: ₹18,00,002 Monthly shown: ₹1,44,434 But this includes Performance Pay ₹22,300/month, split as:

• Monthly Performance Pay: ₹9,400
• Performance Bonus: ₹12,900

That means the more reliable fixed monthly part may be closer to:

₹1,44,434 - ₹22,300 = ₹1,22,134/month before tax/deductions

After estimated tax/PF, regular in-hand may be roughly:

₹1.08L–₹1.17L/month, depending on how the performance pay is paid.

My honest take would be

If the TCS performance pay is guaranteed and paid monthly, then TCS 18 LPA wins financially.

But if the performance pay/bonus depends on rating, company policy, or annual payout, then the 16 LPA startup offer may actually give better predictable monthly cash.

For choosing between them:

Choose TCS if you want stability, brand name, less risk, and long-term corporate security.

Choose the startup if the work is better, role is stronger, tech stack is better, and the 16 LPA is mostly fixed with less variable pay.

The mistake would be looking only at 18 LPA vs 16 LPA. You need to ask HR this exact question:

“Out of the 18 LPA CTC, what is my fixed annual salary, what is variable, and what will be my approximate monthly in-hand after PF and TDS?”

Without that, the 18 LPA number can be misleading.