Compound Interest Formula:
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This calculator estimates the growth of your money in a high-yield savings account (like Amex's) using daily compounding interest. It helps you project how your savings will grow over time with a fixed APY.
The calculator uses the compound interest formula:
Where:
Explanation: The formula calculates daily compounding by dividing the annual rate by 365 and compounding for each day over the investment period.
Details: Compound interest allows your money to grow exponentially over time as you earn interest on both your principal and accumulated interest. High-yield savings accounts typically offer much better returns than traditional savings accounts.
Tips: Enter your initial deposit amount, the annual percentage yield (APY) as a decimal (e.g., 0.0425 for 4.25%), and the number of years you plan to save. All values must be positive numbers.
Q1: How often do high-yield savings accounts compound?
A: Most high-yield savings accounts, including Amex's, compound interest daily and pay it monthly.
Q2: Is the APY guaranteed to stay the same?
A: No, APYs can change based on market conditions. This calculator assumes a fixed rate over the entire period.
Q3: Are there any fees with high-yield savings accounts?
A: Most high-yield accounts have no monthly fees, but check with your specific bank for any account requirements.
Q4: How does this compare to CD accounts?
A: CDs typically offer slightly higher rates but require locking up your money for a set term, while savings accounts offer liquidity.
Q5: Are high-yield savings accounts FDIC insured?
A: Yes, accounts at FDIC-member banks (like Amex) are insured up to $250,000 per depositor.