The annual contribution cap for 401(k) plans often dominates retirement planning discussions. Many workers believe that hitting the standard employee deferral limit means they have done all they can. However, the actual ceiling for total contributions into the account is significantly higher, offering a larger opportunity for wealth accumulation.
The headline figure that most savers know is the elective deferral limit, which is $23,000 for 2024. This is the amount an employee can choose to set aside from their own paycheck. Yet, the Internal Revenue Service allows for a much larger total contribution when employer contributions are factored in. The combined limit for employee and employer contributions stands at $69,000 for 2024.
This combined limit creates a gap of $46,000 between the standard employee deferral and the maximum possible total contribution. The higher figure relies on one critical piece of paperwork that is frequently overlooked by plan participants. Understanding this document is the key to unlocking the additional retirement savings potential.
The document in question is the plan’s Summary Plan Description, often referred to as the SPD. This legal filing outlines the specific rules of your employer’s retirement plan, including details on matching formulas and profit-sharing terms. Many employees never read this document, missing out on provisions that could boost their account balance substantially.
Profit-sharing contributions are the primary mechanism for reaching the higher limit. These contributions are made by the employer, not the employee, and can be funded as a percentage of the worker’s compensation. Because they are often discretionary, employers may not advertise them, but they can push the total annual additions much closer to the $69,000 threshold.
To take full advantage of the higher limit, employees need to know if their plan allows for after-tax contributions. This is distinct from Roth contributions, and it enables savings beyond the standard pre-tax or Roth deferral limits. When these after-tax dollars are used in conjunction with employer matching, a saver can approach the maximum total limit.
The ability to contribute beyond the standard cap is not universal, which is why reading the SPD is essential. Some plans do not permit these additional employee contributions or profit-sharing features. Without checking the specific plan language, a worker may assume they are maxed out when they actually have room to save more.
High earners and those seeking aggressive retirement growth stand to benefit the most from this strategy. By coordinating payroll contributions with employer matching and any allowed after-tax savings, the total amount invested each year can grow dramatically. This approach transforms the 401(k) from a simple savings vehicle into a much more powerful wealth-building tool.
