Online Colorado alimony calculator from Graham.Law. This Colorado alimony calculator makes Colorado maintenance calculations using the Colorado alimony formula.Colorado courts take 40 percent of the divorcing couple's combined monthly adjusted gross income (AGI) and subtract the lowerearning spouse's monthly AGI. Call The Harris Law Firm today at (303) 622-5502 or contact us online to schedule a meeting with our alimony attorney in Denver! The Colorado Maintenance (Alimony) Calculator makes Colorado guideline maintenance calculations with one click of the mouse. Alimony, or "spousal maintenance," as it is called in Colorado, is courtordered payment from the higherearning spouse to the lowerearning spouse. Maintenance, or spousal support, is critical when a major life change occurs within family dynamics. Use our Colorado maintenance calculator. Calculate your Colorado alimony with ease. Input your details and get an accurate estimate of your monthly alimony payments.