Determining the performance of a 401(k) account involves calculating the growth of investments over a specific period. One common method is the time-weighted return, which accounts for contributions and withdrawals, providing a more accurate reflection of investment performance. For example, if an initial investment of $10,000 grows to $12,000 over one year, the simple return is 20%. However, with additional contributions or withdrawals during that year, the time-weighted return will provide a more precise measure of how the underlying investments performed.
Understanding investment growth is essential for long-term financial planning. Tracking performance allows individuals to assess the effectiveness of their investment strategies, make necessary adjustments, and project future retirement income. Historically, long-term investment returns have played a crucial role in building wealth and securing financial stability during retirement.