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2025-2026 Massachusetts Child Support Calculator

This Massachusetts Child Support Calculator is  for child support orders in MA starting December 1, 2025. It is by far the most user-friend MA child support calculator on the internet.

To calculate how much child support you should pay or receive, simply fill in the information below and click “Calculate” for instant results.

For child support calculations and orders between October 4 2021 and November 30 2025, use this 2021-2025 MA Child Support Calculator.

This Massachusetts child support calculator illustrates post-tax income after child support is calculated. This feature does not exist on any other MA child support calculator.

I mediate MA divorces for Worcester, Boston, Springfield, and all MA locations with online divorce mediation on Zoom.  Please feel free to contact me with any questions you have about divorce mediation or uncontested divorce. You can find a divorce mediation checklist here. You can try the most user-friendly MA alimony calculator here. 

After calculating your child support, you can click the button “Save Results to Worksheet PDF” to save the results to a Child Support Guidelines Worksheet .pdf, or you can add the case name, docket number and other information to create a completely court-ready Child Support Guidelines Worksheet .pdf. The calculator can also show an approximation of each spouse’s after-tax income after paying or receiving child support..

The August 2022 MA Supreme Judicial Court ruling in Cavanaugh v. Cavanaugh says that judges making orders in contested (1B) cases must look not only at the result of this child support calculation, but also at child support calculations that first calculate alimony, then use the post-alimony-calculation incomes to then calculate child support. A unique Cavanagh alimony, child support, and tax consequences calculator for Massachusetts divorce on this site does the calculations that judges must consider when making orders in contested (1B) divorce cases that could involve child support.




d)   Which of the following three choices is closest to describing the amount of time the children spend with each parent? Indicate the amount of time that the child spends with each parent by choosing from among 4 choices: about 50% time with each parent, about 1/3 of the time with you and 2/3 of the time with your spouse, about 2/3 of the time with you and 1/3 of the time with your spouse, or (less common) “split” custody, in which different children have primary residence with different parents. Choose the one that is closest to your situation.
  About 67% with Petitioner A and 33% with Petitioner B
  About 50% of the time with each parent
  About 67% with Petitioner B and 33% with Petitioner A
  (Less common) There is more than one child covered by the order, and each parent provides a primary residence for at least one child (different children have different primary residences)
You have indicated that 1 or more children primarily reside with Petitioner A and 1 or more children primarily reside with Petitioner B
b-1) Indicate how many children under 18 primarily reside with Petitioner A and how many with Petitioner B:
c-1) Indicate how many children 18 and 23 who receive child support primarily reside with Petitioner A and how many with Petitioner B:
e)   Enter a weekly dollar amount for the following income and expenses:
Gross weekly income  Enter the gross weekly income for each parent. Gross weekly income is the total amount BEFORE taxes and other deductions are made from your paycheck.:

Health Insurance cost each week  Enter the amount paid by each spouse for family and for individual health care insurance each week.:

Dental/Vision cost each week  Enter the amount paid by each spouse weekly toward the child’s vision or dental insurance. (It can be difficult to separate this out from family vision and dental, since it is typically paid together.):

If you pay child care costs, enter the amount that each parent contributes to the cost for each child. If you do not pay child support for a child, leave it blank:

Child care amount paid for Youngest child:

Child care amount paid for Second Youngest child:

Child care amount paid for Third Youngest child:

Child care amount paid for Fourth Youngest child:

Child care amount paid for Fifth Youngest child:

Weekly alimony or child support paid out to a previous marriage  If either of you pays alimony to a previous spouse or if either of you pays out child support for a child from a previous relationship or marriage, enter the weekly paid out in that person’s column.:

Do you receive a Social Security dependency benefit? (uncommon)

Yes
No

CHILD SUPPORT GUIDELINES WORKSHEET (October 4, 2021 version)

pays



Enter any of the following information that you would like to appear on the Worksheet .pdf:
Case Name:
Docket Number:
Date Prepared:
Name of Preparer:

Gross Annual Income
Approximate Annual MA and Federal Taxes
Annual Child Support
Approximate annual income after taxes and child support

 

 

Your guidelines child support amount is .
Enter a different support amount here, and click the CALCULATE button:

 
Gross Annual Income
Approximate Annual MA and Federal Taxes
Annual Non-guideline Support Amount Chosen by User
Approximate annual income after taxes and non-guideline support amount chosen by user

Tax calculations:

Tax calculation formulas come from the 2023-2024 calculator at: https://goodcalculators.com/us-salary-tax-calculator/massachusetts/

If a parent has the child(ren) 67% of the time, that parent’s taxes are calculated as “Head of household” and the other parent’s taxes are calculated as “Single”. If parenting time is 50-50, this calculator treats both parents as filing “Single”.

This tax calculator will be most accurate for salaried employees who take the standard deduction and who have low pre-tax deductions on their paystub. It may be much less accurate for people who make significant 401k contributions, are self-employed, have their own business, have rental income, have investment income, etc.

This calculator does not include the Child Tax Credit, for children who are 17 or younger at the end of the tax year. These tax credits can be taken by either parent. The separation agreement should specify which parent takes which credits in which years. The amount of this credit has been $2,000 and higher per child in recent years.

This calculator does not include any Child and Dependent Care Tax Credit, and it does not include any Earned Income Tax Credit (for low- to moderate-income families).

The numbering and description of each line come directly from the Massachusetts Probate Court’s CHILD SUPPORT GUIDELINES WORKSHEET, which is a required document for divorce and child support cases and can be downloaded from the link here.
Below are the calculations that lead to the child support amount. The numbering and description of each line come directly from the Massachusetts Probate Court’s CHILD SUPPORT GUIDELINES WORKSHEET, which is a required document for child support and divorce cases. Because you indicated that each parent will have the children about 50% of the time, you will see two sets of calculations. The first one calculates child support as if had most of the parenting time, and the second one calculates child support as if had most of the parenting time. The actual presumptive (“expected”) payment in this 50-50 custody situation is the mathematical difference between the two calculated amounts, with the higher income spouse (typically) paying this difference. This calculation is shown at the bottom of the page.

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Before i found Farias Law, i was worried about the future my divorce would bring me. When i spoke with Farias Family Law, they settled my nerves and painted a path foward. When my divorce was complete, the plan we had laid out was executed…

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The entire team at Farias Family Law were attentive, quick to respond, and extremely professional. Jessica and Bill were able to use their knowledge and resources to help make a difficult situation easy to manage. Bill was very "matter of fact" when setting expectations and…

Steven D.

Atty Farias is professional, very prompt with communication and cares about his clients. He is no nonsense and you feel he wants what is best for you no matter the outcome. I would highly recommend him to anyone.

Barbara R.

Farias Law is amazing, Bill helped me with my child custody case in 2017, he continued to helped me through the years whenever I had a concern he would always get back to me no matter the time or day truly meant so much to…

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The professional amazing service I received far exceeds the 5 stars! I am truly grateful and glad that I went with this law firm, especially with Att. Sousa. She truly is

Ana J.

Despite taking over representation midway through my process, and at a time where certain developments added layers of complexity to my case, Atty Farias has take

Azrina A.

I first met with Atty Farias for concerns I had regarding my son’s safety during visitation. I feel he gave me sound and realistic advice. When the time came to [...]

Nicole D.

I was very pleased working with Farias Family Law P.C. They were right in the very beginning of meeting each other, that they would make this as painless as possible [...]

Andrew D.

It’s only the start of my battle and Bill and his team has already been amazing all throughout. He took my case in such a short amount of time and was still able to

Kay M.

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Testimonials

I hired Bill to handle my divorce case. His team were very professional, understanding and made me feel comfortable during an extremely uncomfortable and difficult time. I loved how informative his website was and how most of our communications could be done via technology. I…

Krystal L.

Before i found Farias Law, i was worried about the future my divorce would bring me. When i spoke with Farias Family Law, they settled my nerves and painted a path foward. When my divorce was complete, the plan we had laid out was executed…

Jon

The entire team at Farias Family Law were attentive, quick to respond, and extremely professional. Jessica and Bill were able to use their knowledge and resources to help make a difficult situation easy to manage. Bill was very "matter of fact" when setting expectations and…

Steven D.

Atty Farias is professional, very prompt with communication and cares about his clients. He is no nonsense and you feel he wants what is best for you no matter the outcome. I would highly recommend him to anyone.

Barbara R.

Farias Law is amazing, Bill helped me with my child custody case in 2017, he continued to helped me through the years whenever I had a concern he would always get back to me no matter the time or day truly meant so much to…

Gina C.

The professional amazing service I received far exceeds the 5 stars! I am truly grateful and glad that I went with this law firm, especially with Att. Sousa. She truly is

Ana J.

Despite taking over representation midway through my process, and at a time where certain developments added layers of complexity to my case, Atty Farias has take

Azrina A.

I first met with Atty Farias for concerns I had regarding my son’s safety during visitation. I feel he gave me sound and realistic advice. When the time came to [...]

Nicole D.

I was very pleased working with Farias Family Law P.C. They were right in the very beginning of meeting each other, that they would make this as painless as possible [...]

Andrew D.

It’s only the start of my battle and Bill and his team has already been amazing all throughout. He took my case in such a short amount of time and was still able to

Kay M.

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