Best high-yield savings interest rates today, September 20, 2025 (Earn up to 4.25% APY)

Overview of Savings Interest Rates - The national average savings account rate is currently 0.40%, a significant increase from 0.06% three years ago [2] - Some top savings accounts are offering rates as high as 4% APY and above, with the highest available rate being 4.25% APY from Poppy Bank as of September 20, 2025 [3] Interest Earnings from Savings Accounts - The interest earned from a savings account is determined by the annual percentage rate (APY), which accounts for the base interest rate and compounding frequency [3] - For an average interest rate of 0.40% with daily compounding, a $1,000 deposit would yield a total of $1,004.01 after one year, resulting in $4.01 in interest [4] - In contrast, a high-yield savings account offering 4% APY would grow a $1,000 deposit to $1,040.81, earning $40.81 in interest over the same period [4] Impact of Deposit Amounts on Interest Earnings - The potential earnings increase with larger deposits; for example, a $10,000 deposit in a high-yield savings account at 4% APY would result in a total balance of $10,408.08 after one year, earning $408.08 in interest [5]