KEY POINTS
  • About 98% of 401(k) plans pay a company match or profit-sharing contribution, according to a Plan Sponsor Council of America survey.
  • In most cases, workers don't own those funds immediately. They must wait at least a year — and sometimes six — before they can walk away with the full amount.
  • 401(k) plan "vesting" rules have many quirks that vary between companies.

If you're a 401(k) plan saver, odds are you are getting a "match" from your employer. But there's a catch — that free money may not belong to you yet.

About 98% of companies that offer a 401(k) plan make regular contributions to workers' retirement savings, according to a survey by the Plan Sponsor Council of America, a trade group.