Best money market account rates today, March 21, 2026 (best account provides 4.01% APY)

Core Insights - The national average money market account (MMA) rate is currently at 0.56%, a significant increase from 0.07% four years ago, indicating that MMA rates are historically high despite recent declines [2] - Some top MMA accounts are offering rates over 4% APY, suggesting that consumers should consider opening accounts now to benefit from these elevated rates [2] Group 1: Current Rates and Historical Context - The national average MMA rate is 0.56%, which is a notable rise from 0.07% four years ago [2] - High-yield money market accounts are available with rates exceeding 4% APY, which may not last long [2] Group 2: Potential Earnings from Money Market Accounts - A $10,000 deposit in an MMA at the average rate of 0.56% would yield a total of $10,056.16 after one year, including $56.16 in interest [4] - In contrast, a high-yield MMA offering 4% APY would grow the same $10,000 to $10,408.08, resulting in $408.08 in interest [4] Group 3: Considerations and Limitations - Money market accounts may have more restrictions compared to traditional savings accounts, such as higher minimum balance requirements and limits on monthly withdrawals [5]