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 your savings growth over time.
The calculator uses the compound interest formula:
Where:
Explanation: The formula calculates daily compounding (365 times per year) which gives slightly better returns than simple annual compounding.
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 rates significantly higher than traditional savings accounts.
Tips: Enter your initial deposit amount, the annual percentage yield (APY) of the account (e.g., 4.25% for Amex), and the number of years you plan to keep the money in the account.
                    Q1: How often is interest compounded in high-yield savings accounts?
                    A: Most high-yield accounts, including Amex, compound interest daily and credit it monthly.
                
                    Q2: Are high-yield savings accounts safe?
                    A: Yes, they are FDIC-insured up to $250,000 per depositor, per institution.
                
                    Q3: How does this compare to regular savings accounts?
                    A: High-yield accounts typically offer 10-20x higher interest rates than traditional savings accounts.
                
                    Q4: Are there any fees or minimum balances?
                    A: Amex high-yield savings has no monthly fees and no minimum balance requirement.
                
                    Q5: How often do interest rates change?
                    A: Rates can change based on Federal Reserve policy and market conditions, though they tend to remain stable for extended periods.