Massachusetts Child Support Calculator

2025 Massachusetts Child Support Guidelines

Use this auto-calculating worksheet to evaluate child support scenarios.

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 responsibility 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 AND COST INPUTS
a. Gross weekly income
Parent A
Parent B
b. Social Security dependency benefit:
Do any of the children receive a dependency benefit from Social Security because of a parent's retirement or disability?
- Yes
- No
If yes, based on which parent's retirement or disability and past earnings?
- Parent A
- Parent B
Enter the amount of the dependency benefit Social Security actually sends to each parent.
Parent A
Parent B
c. Add all amounts in 2b and enter the total in the column of the retired or disabled 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+2c‐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 $8,654, 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 > $391, enter 5b.
If Parent B 3a ≤ $391, 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 > $391, enter 5b.
If the other parent's 3a ≤ $391, 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) ≤ $430, use the actual amounts in 2g for each parent.
If the total child care cost paid by both parents > $430, use for each parent: 2g x ( $430 ÷ 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
Parent A
Parent B
c. Other parent's adjusted share of support
5c + 6b
Parent A
Parent B
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%).
Parent A
Parent B
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 the other parent's 3a), whichever is less, but not less than an amount from the shaded area of the Guidelines Chart.
Parent A
Parent B
f. Recipient and Payor
The Payor is responsible for paying child support for the children covered by this order to the Recipient.
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 6e 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 2c:
If you use the electronic worksheet on Mass.gov, it will automatically check this box for you and calculate the correct amount.
If you are running the worksheet by hand, run a new worksheet
replacing the Recipient's amount in 2c with the Recipient's amount from 2b
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 ÷ Recipient 3a (If Recipient 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 due to the Payor's retirement or disability; 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.
- The presumptive order is 40% or more of the payor's income; a rebuttable presumption of substantial hardship justifying a deviation exists.
8. ADDITIONAL INCOME ABOVE $8,654
a. Combined additional income
3b ‐ $8,654 or $0, whichever is more
b. Share of combined additional income
8a x 3c
Parent A
Parent B

2025 Massachusetts Child Support Guidelines

1. AGE, NUMBER, AND PARENTING OF CHILDREN

2. INCOME AND COST INPUTS

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 $8,654