Step one: annual to monthly
A ₹12,00,000 annual salary divides evenly into a ₹1,00,000 monthly figure — the starting point before any further split.
Step two: basic pay and allowances
At a 50% basic pay policy, that ₹1,00,000 monthly splits into ₹50,000 basic pay and ₹50,000 in allowances. A different basic percentage would shift the same ₹1,00,000 total between the two categories without changing the overall monthly figure.
Why the basic percentage matters beyond just the split
Basic pay isn't just an accounting label — it's the figure many statutory calculations use directly, including EPF contributions, gratuity, and (up to a legal ceiling) statutory bonus. A higher basic percentage can mean higher PF contributions and different tax exemption calculations, even though the total monthly salary stays the same.
What this calculation doesn't include
This is a simple gross-pay breakdown — it doesn't model income tax, PF deductions, or other withholdings that determine actual take-home pay. It also doesn't yet show how the basic-pay figure feeds into other calculations like statutory bonus, covered in the companion article on the connection between them.