Participation in 401(k) plans, regardless of age or income, rises according to the size of a company, according to a report from the Employee Benefit Research Institute.

Size definitely matters, EBRI said. Workers at firms with fewer employees are significantly less likely to participate in a retirement plan than are workers at large firms. Participation in a retirement plan also is affected by the employer’s size, with participation increasing for full-time, full-year private-sector wage and salary workers ages 21 to 64 as firm size grows.

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