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Simple Interest

Interest calculated only on the principal amount.

Simple interest is calculated only on the original principal, not on any accumulated interest. It is straightforward to compute and commonly used for short-term loans, auto loans, and some business credit facilities. Simple interest results in lower total interest paid compared to compound interest over the same period.

Formula

Simple Interest = Principal × Rate × Time

Example

A business borrows $20,000 at 8% simple interest for two years, paying $3,200 in total interest ($20,000 × 0.08 × 2) regardless of payment schedule.

Why It Matters for Your Business

Knowing whether a loan uses simple or compound interest helps you accurately calculate total borrowing costs and compare loan offers.

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