CTC, gross, and take-home
Start with CTC. Take out the employer costs you do not receive as cash this month: employer PF, the gratuity provision, and employer NPS. The diagram uses 12%, 4.81%, and 10–14% for those three. What remains is gross salary. The next row takes off a standard deduction of ₹75,000, then 80C, 80D, NPS, and HRA where you can claim them. Slabs apply to what is left. Take-home is after income tax and professional tax (marked PT on the diagram).
All 30 components combined
Before your own deductions
Slabs applied here
What hits your bank account
Employer PF, gratuity, and employer NPS are inside the CTC even though they are not credited to your account. A ₹15L CTC in Bengaluru comes to roughly ₹9.5–10.5L in the bank, depending on the regime and the deductions you can claim.