Best high-yield savings interest rates today, December 21, 2025 (Earn up to 4.3% APY)

Overview of Savings Interest Rates - The national average savings account rate is currently 0.39%, a significant increase from 0.06% three years ago [2] - Despite the low national average, some high-yield savings accounts are offering rates as high as 4% APY and above [2] Best Savings Rates - As of December 21, 2025, the highest savings account rate available is 4.3% APY, offered by SoFi [3] - The amount of interest earned from a savings account is determined by the annual percentage rate (APY) and the frequency of interest compounding, which is typically daily [3] Interest Earnings Example - A deposit of $1,000 at the average interest rate of 0.39% would yield a total of $1,003.91 after one year, resulting in $3.91 in interest [4] - In contrast, a high-yield savings account with a 4% APY would grow the same $1,000 to $1,040.81, earning $40.81 in interest over the same period [4] Impact of Deposit Amount - Increasing the deposit amount significantly boosts potential earnings; 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]