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April, 2017

Colorado Child Support Version 2017, incorporating the new law, is now available.

Version 2017 is available through its own new web site,


Legal Math is now in use by over 4200 lawyers nationwide.


Legal Math, Colorado Child Support, Oklahoma Child Support and New Mexico Child Support are all Windows XP, Vista, 7, 8 and 10 compatible.



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Custom Legal Software Home Page

Specialized reliable software for lawyers since 1989  

This is our Flagship Program:
(Scroll down to see our other Family Law Software products.)

Legal Math™ a collection of law practice related math applications including a very specialized program to calculate interest on past due child support, child support arrearage or other situations involving irregular charges and payments.  The program has settings you can configure for calculation method differences for Colorado, California, Washington, Oregon, Illinois, Oklahoma, Indiana, Texas (and every other State, as well).  This program is extremely flexible and user friendly.*  (Windows XP, Vista, 7, 8 and 10 compatible.)  
Click here to start the purchase process.
  • In addition to being able to calculate interest on child support arrearage (interest on past due child support in a child support collection case), Legal Math can easily perform an interest calculation in a debt collection case when you need to determine interest on a judgment or other unpaid account.  This software is more than family law software, and is not just for child support lawyers.  It is also applicable to calculating interest in a wide variety of personal and business related situations involving irregular payments.


Other programs
The following are other programs developed and sold by Custom Legal Software:
New Mexico Child Support Guidelines program to calculate child support under New Mexico law.
Oklahoma Child Support Guidelines program to calculate child support under Oklahoma  law. Click to learn more. (This is Version 2009 which complies with the law, effective July 1, 2009)
Colorado Child Support Guidelines program to calculate child support under Colorado law.  (Version 2017 incorporating the new law, is now available.  Version
Colorado Workers Comp Math program to calculate present value of a PTD claim, present value of a PPD claim, and to calculate interest on unpaid and past due TTD benefits under Colorado law. (Version 2010)  Click to learn more and to start the installation process.
[Effective January 19, 2010, WC Math is free. Optional PayPal contribution requested.]
Colorado Financial Affidavit - no longer sold by Custom Legal Software.

* Legal Math Geographical distribution:

Legal Math has a significant presence among family law lawyers and collection lawyers in the following states:  (The program is primarily used in these states to calculate interest on past due child support and to calculate interest on other types of past due accounts involving judgments, garnishments and irregular charges and payments.)

Arizona  California  Colorado  Georgia  Illinois  Indiana  Iowa  Louisiana  Maine Missouri  Nebraska  New Jersey  New Mexico  Oklahoma  Oregon  Pennsylvania Texas  Washington  Wisconsin

Legal Math also has a modest presence among family law lawyers and collection lawyers in the following states:

Alabama  Alaska  Arkansas  Connecticut  Florida  Idaho  Kansas  Kentucky Louisiana  Michigan  Minnesota  Mississippi  Nevada  New York  Ohio  Tennessee  Utah  Virginia  Wyoming.

There are Legal Math users in most of the rest of the states, as well, but not enough for us to be bragging about them  -  yet.

 Legal Math is used by Governmental Child Support Enforcement Offices in parts of California, Colorado, Nebraska, Oklahoma and Wisconsin.

You can order any product with complete confidence right here on the Internet. Using the latest in secure sockets technology, your personal and credit card information are encrypted and transferred with complete security. Also read our privacy policy.

April, 2017

Custom Legal Software
760 Club Circle
Louisville, Colorado  80027

 (from outside Colorado)

Contact: William Redak

Downloads for those who already have a license for current versions of the following programs:

If you are a current registered user, there is no charge to download these program "setup" files. 

You do not need your Activation Code to download these "setup" files.

You do not need your Activation Code to install these "setup" files.

You will need your Activation Code before you are able to actually use a program after it has been installed.

Colorado Child Support program: This program has been revised because of changes in the law effective January 1, 2017.  It is now available through its own new web site:

Legal Math program: For the Legal Math program, please start at the Customer Support section.  Click on the Customer Support button in the upper left corner of the screen.

Oklahoma Child Support program: If you are already licensed for Oklahoma Child Support program, Version 2009, you can click here to get to the screen where you can download the Setup file that you will need in order to install or re-install the program. 



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