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Finance & Money Calculator
Illustrative math, reviewed October 2026 — not financial, tax, or legal advice. Verify rates and slabs before you sign or file.
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Simple interest is principal × rate × years, paid only on the original sum. Compound interest grows on the accumulated balance, so it pulls ahead the longer money stays invested. On ₹1,00,000 at 8% for 5 years, simple totals ₹1,40,000 while annual compounding totals ≈ ₹1,46,933 — the ₹6,933 gap is compounding's edge, and showing both makes the cost of borrowing or benefit of saving concrete.
Enter any principal, rate, and years. The figure that matters most is Extra via compounding: near zero over one year at low rates, it becomes the dominant number over decades — which is why lenders quote simple-looking rates on long loans. For monthly or quarterly compounding, switch to the FD or SIP tools that build frequency in.
It does not include fees, tax, compounding frequency choices, or inflation — it is a clean side-by-side of the two formulas so you can see compounding's edge, nothing more.
Illustrative math only — not financial advice or a bank quote.
Tax and statutory rules change; verify with a professional.
At higher rates and longer terms. Over one year at a low rate they are almost identical; over ten years the compound total noticeably exceeds the simple one.
Almost always compound in some form — reducing-balance for loans, quarterly for FDs. Simple interest survives mainly in textbooks, short informal loans, and some penalty computations.
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