The employee contributes to the FSA in small increments throughout the year (for example, 1/26 of the annual amount if one is paid every two weeks), but taken together, all employees of a company contribute the full average amount during any given period, and no real risk is incurred by the employer. In addition, instead of paying payroll taxes to the government, the employer typically pays only a small administrative fee to the plan of $4–10 per month per participating employee. This is much less than the employer would have paid for its share of payroll taxes. In addition, any money that is not used by the end of the plan year (or grace period) is returned to the employer. This is estimated to be up to 14% of the total employee contributions, which can be a substantial boon to the employer's bottom line.