State Insurance Fund (SIF) will send the Controller's Office a Policy Account Balance file (with the premium amount due for each agency based on the prior pay periods earnings) every payroll.

Workers' compensation premiums will be distributed by totaling the workers compensation rate for each employee paid in an agency, and then dividing that rate to get a pro-rated percent. The agency premium will be multiplied by the pro-rated percent which will then be the total amount applied to each employee.

Agency Premiums are withheld based on the following formula:

 Process Example (Red indicates the calculation in each step) 1.   System looks up all employees paid on payroll. (STA record) Employee A Employee BEmployee CEmployee DEmployee E 2.   System then looks up each employees workers comp code with rate Employee A - WC 8810    .0027Employee B - WC 8810    .0027Employee C - WC 8742    .0047Employee D - WC 5506    .0640Employee E -  WC 9410    .0146 3.   System summarizes each individual rate into an agency total Agency Total                    .0887 4.   System divides each individual rate by the summarized total to get the pro-rated rate for each employee Employee A    .0027 / .0890 = .0304Employee B    .0027 / .0890 = .0304Employee C    .0047 / .0890 = .0530Employee D    0640 / .0890 = .7215Employee E    .0146 / .0890 = .1646 5.   System takes the premium due (received from SIF) and multiplies the amount due by the pro-rated rate and adds \$.01 to get the actual premium that is withheld for each person. Total Premium from SIF = \$200.00Employee A   .030 x 200 = \$6.08 +.01 = \$6.09Employee B   .030 x 200 = \$6.08 +.01 =\$ 6.09Employee C   .053 x 200 = \$10.60 +.01 = \$10.61Employee D   .719 x 200 = \$144.30 +.01 = \$144.31Employee E    (Complete on next step) 6.   The last person processed in the file will be calculated differently. Their premium is the balance remaining after all other premiums have been withheld. Total Premium from SIF = \$200.00Employee A    \$6.09Employee B    \$6.09Employee C    \$10.61Employee D    \$143.31Total Premium withheld to this point = \$167.10Employee E    \$200 – \$167.10 = \$32.90

For a list showing complete Workers Compensation Code descriptions and rates use this link

https://www.idahosif.org/info/rates