Form SF-329C at a glance
What it is: Wage Garnishment Worksheet (SF-329C), Standard Form 329C (11-98), prescribed by 31 CFR 285.11.
The Employer may use a copy of this Worksheet (SF-329C) each pay period to calculate the Wage Garnishment Amount to be deducted from a debtor's disposable pay. Disposable pay includes, but is not limited to, salary, overtime, bonuses, commissions, sick leave and vacation pay. If section 2(a) of the Wage Garnishment Order specifies the dollar amount to be garnished, the employer does not need to complete this Worksheet.
A filled-in Form SF-329C example: an employer figures disposable pay
How to fill out Form SF-329C, box by box
Disposable pay computation
In the DISPOSABLE PAY COMPUTATION, enter the Gross Amount paid to Employee on line 1.
Under Amounts Withheld, list a. Federal income tax, b. F.I.C.A. (social security), c. Medicare, d. State tax (including income tax, unemployment, disability), e. City/Local tax, f. Health insurance premiums and g. Involuntary retirement or pension plan payments.
On line 3, Total allowable deductions, add lines a - g.
On line 4, DISPOSABLE PAY, subtract line 3 from line 1.
More rules for Form SF-329C
Select one Pay Period Frequency: Weekly or less, Every other week, Two times per month, Monthly or Other (Specify).
If the Employee's wages are not subject to any withholding orders with priority, skip to line 8.
On line 5, 25% of Disposable Pay, multiply line 4 by .25.
On line 6, enter the Total Amounts Withheld Under Other Wage Withholding Orders with Priority. See section 2(b) of the Order.
On line 7, subtract line 6 from line 5. If line 6 is more than line 5, enter zero.
On line 8, multiply the percentage from section 2(b)(1) of the Order by line 4. The percentage from section 2(b)(1) of the Order may not exceed 15%.
On line 9, use the amount equivalent to 30 times the Federal Minimum wage ($7.25): Weekly or less 217.50, Every other week 435.00, 2x per month 471.25, Monthly 942.50 (checked November 9, 2026).
On line 10, subtract line 9 from line 4. If line 9 is more than line 4, enter zero.
On line 11, WAGE GARNISHMENT AMOUNT, enter line 7, 8, or 10, whichever amount is the smallest.
Sources
[1] Standard Form 329C (11-98), Wage Garnishment Worksheet, U.S. Department of the Treasury (the Official source link on this page).