401k Forfeiture: Overview, How It Works, Example

By Lyle Daly – Updated May 29, 2025 at 6:42 PM EST | Fact-checked by Frank Bass

Key Points

401(k) forfeiture occurs if you leave a job before being fully vested.
Employer contributions vest according to schedules, with many employers using cliff vesting or graded vesting.
To avoid losing employer contributions, stay with the company until fully vested.

A 401(k) forfeiture is when you lose the unvested portion of your 401(k) balance. Contributions you made are 100% yours, but contributions your employer made are only yours once they're vested. Since a 401(k) forfeiture can be a sizable loss, it's important to know how it works and how to avoid it.

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An image showing how 401k forfeitures work. — 401(k) forfeiture accounts

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Data source: Internal Revenue Service (2025).
Full Years of Service Completed	Amount Vested
Less than 2 years	0%
2 years	20%
3 years	40%
4 years	60%
5 years	80%
6 years	100%

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Make sure to review how many years of service it takes to become fully vested and how your employer defines a year of service. Employers may go by calendar year or anniversary year, and a year of service typically requires a minimum number of hours, such as 1,000 hours worked during the year.

Unfortunately, unvested contributions are normally forfeited if you're fired or laid off. But if a company has a turnover rate of 20% or more, that generally qualifies as a partial termination of the 401(k) plan, which requires fully vesting contributions. So, in the event of a mass layoff at your company, you may be fully vested if you're one of the people let go.

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About the Author

Lyle Daly is a contributing Motley Fool stock market analyst covering information technology and cryptocurrency. Lyle has been a contributor at the financial services company since 2018. His work has been featured on USA Today, Yahoo Finance, MSN, Fox Business, and Nasdaq. Before joining The Motley Fool, he wrote for financial brands including Intuit.

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