Compound Interest Formula:
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The compound interest formula calculates the future value of a lump sum investment by accounting for both the initial principal and the accumulated interest over time. It's essential for evaluating savings accounts and investment growth potential.
The calculator uses the compound interest formula:
Where:
Explanation: The formula calculates how much your initial investment will grow based on the interest rate and compounding frequency over a specified period.
Details: Understanding compound interest helps investors make informed decisions about savings accounts and investments, showing how money can grow over time through the power of compounding.
Tips: Enter the lump sum in GBP, annual interest rate as a percentage, number of compounding periods per year, and time in years. All values must be positive numbers.
Q1: What's the difference between simple and compound interest?
A: Simple interest is calculated only on the principal amount, while compound interest is calculated on both the principal and accumulated interest.
Q2: How does compounding frequency affect returns?
A: More frequent compounding (e.g., monthly vs. annually) results in higher returns due to interest being calculated more often.
Q3: Are there tax implications on interest earned?
A: Yes, interest earned on savings is typically subject to income tax, though there are tax-free allowances in the UK.
Q4: What are the best savings accounts for lump sums in the UK?
A: Fixed-rate bonds, notice accounts, and cash ISAs often offer competitive rates for lump sum investments.
Q5: Can I withdraw money from fixed-term savings accounts?
A: Fixed-term accounts usually have restrictions on withdrawals and may charge penalties for early access to funds.