Best money market account rates today, March 15, 2026 (best account provides 4.01% APY)

Core Insights - The Federal Reserve has cut its target rate three times in 2025, leading to a steady decline in deposit rates, including money market account (MMA) rates [1] - The national average MMA rate is currently at 0.56%, while some top accounts offer rates as high as 3%-4% APY, suggesting a potential opportunity for consumers to earn more by opening accounts now [2] Money Market Account Rates - The national average money market account rate is 0.56% according to the FDIC, but higher rates of 3%-4% APY are available from select accounts [2] - The interest earned from a money market account is determined by the annual percentage rate (APY), which accounts for the base interest rate and compounding frequency, typically daily [2] Interest Earnings Examples - A deposit of $1,000 in an MMA at the average interest rate of 0.56% with daily compounding would yield a total balance of $1,005.62 after one year, resulting in $5.62 in interest [3] - In contrast, a high-yield MMA offering 4% APY would grow a $1,000 deposit to $1,040.81 over the same period, generating $40.81 in interest [3] Impact of Deposit Amount - Increasing the deposit amount in a money market account significantly enhances potential earnings; for example, a $10,000 deposit at 4% APY would result in a total balance of $10,408.08 after one year, yielding $408.08 in interest [4]