Calculating Child Support in Montana

The way to calculate child support in Montana can be found in the Administrative Rules of Montana (ARMs). These rules were created by the Department of Public Health and Human Services, which is an administrative agency of Montana. The Child Support Enforcement Division is a part of DPHHS. The administrative rules describe how to calculate child support in Montana, but unfortunately can be tough to read.

The Department puts out a worksheet that makes the math easier. You can find these sheets on DPHHS’ website at:

The first worksheet is 27 steps long and may involve completing another worksheet all together. The instructions can be found on that same site, but may or may not shed much light on the situation. You may also need to review the original administrative rules if you need further help.

Luckily, there’s another option. We provide an online child support calculator that uses this formula, but does all the hard work for you. You enter the numbers, and we’ll figure out the calculations. You can make as many changes as you like, because for one payment you can create an unlimited number of calculations, access them online from anywhere, and print court-ready versions of the documents. If you’re involved in a divorce with children or a child custody dispute, Montana is going to require that you provide child support calculations during the court process. Why not find out what those calculations will be?


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