DISCLAIMER: If a negative number results, it indicates the lower-earning parent may owe support to the higher-earning parent.
CS = K × [HN − (H% × TN)]
K = factor × base, where factor = (H% ≤ 50%) ? (1 + H%) : (2 − H%) and base depends on the monthly TN bracket. (If you enter annual values, the calculator converts to monthly internally.)