California doesn't use a "calculator" for determining the amount of long-term spousal support. Instead, judges must decide how much to award after they've considered all of the following circumstances: each spouse's needs, based on the standard of living they had during the marriage.
In situations where a parent has children with two separate mothers, the court will still use the income shares model to determine the total child support obligation.
40% of the high earner's net monthly income minus 50% of the low earner's net monthly income. For instance, if Spouse A earns $5,000 per month and Spouse B earns $2,500 per month, temporary spousal support might be calculated as follows: 40% of $5,000 = $2,000. 50% of $2,500 = $1,250.
Child Support With Multiple Mothers It now follows an 'income shares' model that considers each parent's income when deciding the total amount of child support. This is instead of the court ordering one parent to provide child support to the other on a mere percentage basis.
The guideline states that the paying spouse's support be presumptively 40% of his or her net monthly income, reduced by one-half of the receiving spouse's net monthly income. If child support is an issue, spousal support is calculated after child support is calculated.
It's important to understand that simply having another child does not automatically reduce your child support obligation. However, if your circumstances have changed, it is possible to seek a modification of the child support agreement.