Massachusetts Child Support Calculator – Skylark Law & Mediation, PC

The 2021 Child Support Guidelines were took effect on October 4, 2021 and were updated on July 31, 2023 to the 2023 Child Support Guidelines (which did not include an update to the worksheet). The online calculator below uses these guidelines. The Child Support Guidelines Task Force is currently working on an update for 2025.

An auto-calculating version created in Microsoft Excel is also available for download with a subscription to Gray Jay Endeavors, LLC Massachusetts forms subscription.

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To download the results on the court form worksheet go to the end of the form and click “Download the form as PDF”

2021 Massachusetts Child Support Calculator

1. AGE, NUMBER, AND PARENTING OF CHILDREN
a. Number of children who may be eligible to be covered by this order
Please enter a number from 1 to 5.
b. Check the box that applies to the children listed in 1a
(check one box only)
(check one box only)
- The parents share financial responsibilities and parenting time approximately equally (shared)
- The children primarily reside with one parent for approximately 2/3 of the time
- There is more than one child covered by the order and each parent provides a primary residence for at least one child (split)
c. Enter each parent's name
If you checked Box 2 above, enter the name of the parent with whom the children primarily reside in the column for Parent A, and the other parent's name as Parent B; otherwise, enter either parent's name in either column
Parent A
Parent B
Enter the number and age of children for whom each parent may be eligible to receive support
If you checked Box 1 above (shared), enter the number of children from 1a in the columns for both parents
If you checked Box 2 above, enter the number of children from 1a in the column for Parent A, and enter 0 in the column for Parent B
If you checked Box 3 above (split), enter the number of children primarily residing with each parent in each column
d. Number of children under age 18
Parent A
Parent B
e. Number of children 18 years or older
Parent A
Parent B
f. Total number of children
Parent A
Parent B
2. INCOME
a. Gross weekly income
Parent A
Parent B
Social Security dependency benefit:
b. Enter the total amount of the dependency benefit in the column of the retired or disabled parent
Parent A
Parent B
c. Enter the amount of the dependency benefit Social Security sent directly to each parent
Parent A
Parent B
Deductions:
d. Other support obligations paid
Parent A
Parent B
e. Health care premium/enrollment paid
Parent A
Parent B
f. Dental/vision insurance cost paid
Parent A
Parent B
Credits:
g. Child care cost paid for children covered by this order
Child 1:
Parent A
Parent B
Total
Child 2:
Parent A
Parent B
Total
Child 3:
Parent A
Parent B
Total
Child 4:
Parent A
Parent B
Total
Child 5:
Parent A
Parent B
Total
Total for each parent
Parent A
Parent B

RESULTS
Payor's presumptive final support obligation
See full worksheet calculation below:
pays
3. GROSS SUPPORT AMOUNTS
a. Available income
2a+2b‐2d‐2e‐2f, but not less than $0
Parent A
Parent B
b. Combined available income
Parent A 3a + Parent B 3a
c. Share of combined available income
3a ÷ 3b (Min 0%, Max 100%)
Parent A
Please enter a number from 0 to 100.
Parent B
Please enter a number from 0 to 100.
d. Applicable available income
3b or $7,692, whichever is less
e. Support amount for one child
From Table A or Guidelines Chart for 3d
f. Adjustment for the number of children in 1f
From Table B
Parent A
Parent B
g. Combined support amount
3e x 3f
Parent A
Parent B
4. ADJUSTMENTS FOR CHILDREN 18 YEARS OR OLDER
a. Adjustment percentage for the ages of the children listed in 1d and 1e
From Table C
Parent A
Please enter a number from 0 to 100.
Parent B
Please enter a number from 0 to 100.
b. Adjustment for children 18 years or older
3g x 4a
Parent A
Parent B
c. Adjusted combined support amount
3g - 4b
Parent A
Parent B
5. PROPORTIONAL SUPPORT AMOUNTS
a. Minus each parent's share of support
3c x 4c
Parent A
Parent B
b. Other parent's share of support
4c - 5a
Parent A
Parent B
c. Other parent's share of support with low‐income payor adjustment
If you checked Box 2 in 1b, enter $0 for Parent B, and for Parent A:
If Parent B 3a > $249, enter 5b
If Parent B 3a ≤ $249, enter the amount from the shaded area of the Guidelines Chart for Parent B 3a
If you checked Box 1 or Box 3 in 1b, for each parent:
If the other parent's 3a > $249, enter 5b
If the other parent's 3a ≤ $249, enter the amount from the shaded area of the Guidelines Chart for the other parent's 3a
Parent A
Parent B
6. ADJUSTED SUPPORT AMOUNTS
a. Child care cost benchmark amount
For each child with an amount in 2g:
If the total child care cost paid by both parents (in the third row of 2g) ≤ $355, use the actual amounts in 2g for each parent.
If the total child care cost paid by both parents > $355, use for each parent: 2g x ( $355 ÷ the total child care cost paid by both parents).
Add up the resulting amounts over all of the children and enter each parent's overall child care cost into the appropriate column in 6a.
Parent A
Parent B
b. Other parent's share of benchmark cost
For Parent A: Parent B 3c x Parent A 6a
Parent B: Parent A 3c x Parent B 6a
c. Other parent's adjusted share of support
5c + 6b
d. Support as % of each parent's available income
If you checked Box 2 in 1b, enter "N/A"
If you checked Box1 or Box3 in 1b, enter 6c ÷ 3a (If 3a = 0, enter 100%)
e. Other parent's adjusted share of support
If 6d is ≥ 10% or is N/A, enter 6c for each parent
If 6d is < 10%, enter 6c or ((6d + 10%) x 3a) for each parent, whichever is less, but not less than an amount from the shaded area of the Guidelines Chart
f. Recipient and Payor
If you checked Box 2 in 1b, enter "Recipient" for Parent A and "Payor" for Parent B
Otherwise: Enter "Recipient" in the column with the higher amount in 6c and "Payor" in the other column
If 6c is the same in both columns, enter "Recipient" in either column and "Payor" in the other column
Parent A
Parent B
g. Payor's adjusted share of support
Enter Recipient 6e ‐ Payor 6e, but not less than $0, unless the below applies:
If you checked Box 1 or Box 3 in 1b, and there is a dependency benefit in Recipient 2b:
If you are using the electronic worksheet on Mass.gov, check this box; the worksheet automatically calculates the correct amount
If you are running the worksheet by hand, run a new worksheet
replacing the Recipient's amount in 2b with the Recipient's amount from 2c
Keep all other figures the same, and check this box in the new worksheet
7. PAYOR'S NET SUPPORT OBLIGATION
a. Support as % of Recipient's available income
If you checked Box 1 or Box 3 in 1b, enter "N/A"
If you checked Box 2 in 1b, enter 6g ÷ 3a (If 3a = 0, enter 100%)
Please enter a number from 0 to 100.
b. Payor's support obligation adjusted for income disparity
If 7a is ≥ 10% or is N/A, enter 6g
If 7a is < 10%, enter 6e, 6g, or ((7a + 10%) x Payor 3a), whichever is less, but not less than an amount from the shaded area of the Guidelines Chart
c. Credit for Social Security dependency benefits paid
Enter from 2b the amount of the dependency benefit that Social Security sent directly to the Recipient; if blank, enter $0
d. Payor's final support obligation
If 7b > 7c, enter 7b ‐ 7c; otherwise enter $0
Payor pays Recipient
e. Support as % of Payor's available income
If Payor 3a = 0, enter 100%; otherwise 7d ÷ Payor 3a
If 7e ≥ 40%, check the box at right; otherwise leave it blank
- If this box is checked, the support amount in 7d may be a substantial hardship justifying a deviation from the guidelines
8. ADDITIONAL INCOME ABOVE $7,692
a. Combined additional income
3b ‐ $7,692 or $0, whichever is more
b. Share of combined additional income
8a x 3c
Parent A
Parent B

If you’re looking for the 2018 Guidelines click here.

Links related to the 2021 Child Support Guidelines:

New Massachusetts Child Support Guidelines (2021): Big Changes, Little Changes, Typos & some Unexpected Results

The 2021 Massachusetts Child Support Guidelines

The 2021 Massachusetts Child Support Court Form Worksheet

All Information related the 2018, 2017 and 2013 Guidelines

Information on Mediation

Information on Collaborative Law

2021 Massachusetts Child Support Calculator

1. AGE, NUMBER, AND PARENTING OF CHILDREN

2. INCOME

RESULTS

3. GROSS SUPPORT AMOUNTS

4. ADJUSTMENTS FOR CHILDREN 18 YEARS OR OLDER

5. PROPORTIONAL SUPPORT AMOUNTS

6. ADJUSTED SUPPORT AMOUNTS

7. PAYOR'S NET SUPPORT OBLIGATION

8. ADDITIONAL INCOME ABOVE $7,692