CALIFORNIA CHILD SUPPORT CALCULATOR

The following calculator will give you a rough approximation of the amount owed in child support.  It is only to be used as a guide.  There are many variables that the court will take into account which are not addressed in this calculation.   As such, Kalfin & Bowersett make no representation as to the calculated figure's accuracy.  Use it only as a guide. 
Father's Monthly Net Income*:
Mother's Monthly Net Income*:
Father's Custodial Time (%):
Number of Children

Step One: Calculate Father's Net Monthly Income*. This is Father's income after payment of taxes. 

Step Two: Calculate Mother's Net Monthly Income*. This is Mother's income after payment of taxes. 

Step Three: Calculate FATHER'S custodial time (whether or not father or mother is the primary custodial parent.  This is just a convenient way to avoid having to calculate Mother's custodial time. )

Step Four: Enter the number of children that are to be supported.

The resulting figure is an approximate calculation. As discussed more fully, there are a number of variables used by the court that the above calculation does not take into account. As such, use the figure only as a rough guide.
Why is this calculator only a rough approximation?  

Because the court uses a program that calculates an amount that takes into account:

  • after tax income of the parties, which must include the number and type of exemptions
  • federal tax liability
  • state tax liability
  • employment taxes (Medicare, Social Security, disability, etc.)
  • if self-employed, employment taxes
  • income of a new spouse
  • filing status of the father and mother (e.g., Head of Household, Married Filing Jointly, Married Filing Separately, etc.)
  • hardships deductions (e.g., supporting another child or parent),
  • payment of mandatory union dues
  • heath insurance payments
  • child care costs
  • effect of interest paid on a mortgage
  • and more
*The following table gives an example of the net monthly income of a parent filing as  head of household with two exemptions (claiming two children), claiming standard deductions (nonitemized). 
  Hourly Wage Monthly Gross Net Monthly Income
  $10 Gross $1750.00 $1590.00 (about 8% less than gross)
  $15 Gross $2,600.00 $2,200.00 (about 15.5% less than gross)
  $20 Gross $3,450.00 $2,890.00 (about 17% less than gross)
  $25 Gross $4,333.00 $3,990.00 (about 18% less than gross)
  $30 Gross $5,200.00 $4,050.00 (about 22%less than gross)
  $40 Gross $6,933.00 $5,200.00 (about 25% less than gross)
  $50 Gross $8,666.00 $6,326.00 (about 27% less than gross)
  $60 Gross $10,400.00 $7,488.00 (about 28% less than gross)
Oddly, the net monthly income of a low earner is actually HIGHER than his or her gross net monthly income because of the certain tax credits. For example, someone earning $1,200 a month gross, would actually have a net monthly income of $1,250, assuming for example the person filed head of household with two exemptions. Also, the program can take into account a low earner's status, and make adjustments to the amount of support.