Simple Interest Calculator
Compute flat non-compounding interest on principal amounts for short-term loans, bonds, agricultural credit, and personal promissory notes.
Simple Interest Summary
Total Interest: —
Flat interest calculated directly on your principal amount without compounding.
Interest Earned
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Final Total Amount
—
Principal Amount
—
Total Interest (SI)
—
Maturity / Total Payback
—
Principal vs Interest Share
Linear Interest Accumulation
Constant annual interest accrual over time
Year-by-Year Interest Schedule
| Year | Principal Balance | Annual Interest Earned | Cumulative Interest | Total Maturity Balance |
|---|
Simple Interest Formula
Simple Interest is calculated using the formula SI = (P × R × T) / 100, where P is Principal, R is Rate per annum, and T is Time in years.
Simple vs Compound Interest
Unlike Compound Interest where interest earns interest over time, Simple Interest accrues strictly on the initial principal amount throughout the tenure.
Common Applications
Simple Interest is commonly used for short-term personal loans, car financing flat rates, treasury bills, and certain fixed-term promissory agreements.