This 401(k) plan feature is a ‘green light to contribute aggressively,’ advisor says

Lump-sum investing, or putting larger amounts of money to work sooner, maximizes time in the market, which can increase growth potential, according to research from Vanguard released in 2023.    

But it’s important to understand your 401(k) plan before front-loading contributions because not all plans offer a true-up feature, experts say.

Roughly 67% of 401(k) plans that offer matches more than annually had a true-up in 2023, according to a yearly survey released by the Plan Sponsor Council of America in December.

Clients have been “penalized for maxing out too early” without a true-up, which meant “leaving money on the table,” said CFP Ann Reilley, principal and CEO of Alpha Financial Advisors in Charlotte, North Carolina. She is also a certified public accountant.

For example, let’s say you’re under age 50, making $200,000 per year, and your company offers a 5% 401(k) match without a true-up.

With 26 pay periods and a 20% contribution rate, you’ll reach the $23,500 deferral limit for 2025 after 16 paychecks and only receive about $6,200 of your employer match. In this case, you’d miss roughly $3,800 of your employer 401(k) match by maxing out early without a true-up.

You can learn more by checking your 401(k) summary plan description, which outlines key details about the account, Reilley said.  

Only about 14% of employees maxed out 401(k) plans in 2023, according to Vanguard’s 2024 How America Saves report, based on data from 1,500 qualified plans and nearly five million participants.