Ok, then it would definitely be worth it, dollar wise, to ask for a recalculation. The question is, can she honestly pay the increased amount? If she cannot, for all practical purposes, then she may quit her job and/or try to find some other way to support herself to avoid paying you that much. It could also cause some resentments with the children (maybe not but maybe) and it could certainly cause hostility between you and mom.
How long have you actually had custody of the children? That might have an impact.
I would maybe consider trying to work out a different agreement with mom first.
It is complicated (I am sure it always is).
Currently she does not work (she never has), the $341 figure was made assuming she worked minimum wage which, I understand it, is an assumption Colorado makes as a minimum figure for income. When we made the current agreement (about two years ago) my son (15 now) had suffered trauma in the form of abuse while in mom's care and without getting into too much detail we agreed in mediation that he would go from 50/50 to every other Thursday-Sunday with mom and the rest of the time with me. We also agreed that she and he would go to therapeutic visitation at least one hour a week and potentially more as decided by his therapist and the provider of the therapeutic visitation. It was also agreed upon that in six months we would review the situation and see if it would be appropriate to modify parenting time based heavily on the advice of his therapist and the provider of the therapeutic visitation. Our daughter (16 at that time) was to be with me full time. I agreed to a lesser amount of child support to avoid court and she was claiming financial hardship as her husband had recently lost his job.
At this point the co-parenting situation went from neutral to her being openly hostile.
In that time she did not engage at all in therapeutic visitation and the relationship between him and his mother worsened to the point that he asked me if he could not go to his mother's house.
So at the six month mark we agreed to a modification of our parenting plan that had her parenting time set at one hour of therapeutic visitation with our son minimum, more at the discretion of the provider of the therapeutic visitation and his therapist. This was around March of 2019.
She hasn't seen him since and has exchanged a couple of text messages with him. He is hurt and feels abandoned by her.
So I don't think it would cause resentment from him and I don't think she could be more hostile at me. Currently the 18 year old no longer lives in my home. I have asked mom if she wants to modify child support but she does not because she knows that it will increase if we go by the guidelines and she also know that I no longer have incentive to agree to less. I have been giving my daughter half of the child support mom pays because I am not sure what else to do, I already feel like I am not doing the right thing by accepting it while she doesn't live here.
Once she turns 19 I feel like I have to modify support because our current documentation has no provision for her aging out of support.