Compound Interest Formula:
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This calculator estimates the growth of your money in a high-yield savings account like American Express 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 accounts for daily compounding (365 times per year), which is how most high-yield savings accounts calculate interest.
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 in dollars, the annual interest rate as a decimal (e.g., 0.0425 for 4.25%), and the time period in years. All values must be positive numbers.
Q1: How often is interest compounded in high-yield savings accounts?
A: Most high-yield savings accounts, including Amex, compound interest daily and credit it to your account monthly.
Q2: Are high-yield savings accounts safe?
A: Yes, when offered by FDIC-insured banks (like Amex), they are protected up to $250,000 per depositor.
Q3: How does this compare to CD or money market accounts?
A: Savings accounts offer more liquidity than CDs (no fixed term) and typically better rates than money markets, though rates may change.
Q4: Are there any fees or minimums with Amex savings?
A: Amex currently has no monthly fees and no minimum balance requirements.
Q5: How often do rates change?
A: Rates can change based on Federal Reserve policy and market conditions, though they tend to remain competitive.