Colorado courts take 40 percent of the divorcing couple's combined monthly adjusted gross income (AGI) and subtract the lowerearning spouse's monthly AGI. Online Colorado alimony calculator from Graham.Law.Learn about the types of alimony available in Colorado, how it's calculated, and the factors courts consider when awarding spousal maintenance. This Colorado alimony calculator makes Colorado maintenance calculations using the Colorado alimony formula. Calculating alimony in Colorado (CO) involves various state-specific laws and factors. Understanding these elements can help individuals navigate their. Courts may award maintenance to a spouse based upon either an advisory statutory formula, or upon traditional factors, such as need, ability to pay, etc. The court will proceed to calculate the child support percentage that each of you owes. The total of both percentages must be 100 percent. Get an estimate for alimony payments and duration.