💰 Financial Planning

The maths of real money — GST on your bills and interest on your savings!

Price (before GST) ₹1000

GST rate

Price₹1000

CGST (half)₹90

SGST (half)₹90

TOTAL PAYABLE

₹1180

Principal ₹5000

Rate 8% p.a.

Time 3 years

Interest earned₹1200

AMOUNT AFTER TIME

₹6200

🧠 The Big Idea

GST (Goods & Services Tax) is added to a price; within a state it splits equally into CGST + SGST.
Simple interest: SI = P×R×T/100. Compound interest earns "interest on interest": A = P(1 + R/100)ᵀ.
These are the tools behind bills, loans, savings, shares & SIPs — real-life money maths! 🪙