Massachusetts courts calculate child support using the income shares model under the 2025 Child Support Guidelines, effective December 1, 2025. For a family with combined gross income of $100,000 per year and one child, the base support obligation typically ranges from $300 to $500 per week, depending on parenting time allocation. The minimum child support payment in Massachusetts is $12 per week for low-income payors earning under $210 weekly gross income, while the guidelines cap combined parental income at $450,000 annually. Massachusetts consistently produces the highest child support payments in the nation according to comparative studies, with average annual payments reaching $7,266 as of 2022.
Key Facts: Massachusetts Child Support
| Category | Details |
|---|---|
| Governing Law | M.G.L. Chapter 208, § 28 |
| Calculation Model | Income Shares (both parents' gross income) |
| Guidelines Version | 2025 Child Support Guidelines (effective December 1, 2025) |
| Combined Income Cap | $450,000 per year |
| Minimum Payment | $12 per week (gross income under $210/week) |
| Filing Fee | $120 (Custody/Support/Parenting Time complaint) |
| Support Duration | Until age 18; up to 21 if dependent; up to 23 if enrolled in college |
| Enforcement Agency | Massachusetts DOR Child Support Enforcement Division |
How Massachusetts Calculates Child Support in 2026
Massachusetts calculates child support using the income shares model, which requires both parents to contribute based on their proportional share of combined gross income. Under M.G.L. Chapter 208, § 28, judges must apply the Child Support Guidelines promulgated by the Chief Justice of the Trial Court, and there is a rebuttable presumption that the calculated amount is the appropriate support order. The 2025 Guidelines effective December 1, 2025, raised the combined parental income cap from $400,000 to $450,000 annually, capturing more income in the base calculation.
Step-by-Step Calculation Process
The Child Support Guidelines Worksheet requires parents to follow these calculation steps:
- Determine each parent's gross weekly income (annual income divided by 52)
- Calculate combined gross weekly income
- Subtract allowable deductions (taxes, health insurance premiums, childcare costs)
- Determine "available income" for each parent
- Calculate each parent's percentage share of combined available income
- Apply Table A from the Guidelines to determine base support amount
- Add childcare costs and health insurance premiums proportionally
- Apply parenting time adjustments if applicable
What Counts as Gross Income
Massachusetts defines gross income broadly under the 2025 Guidelines. Gross income includes salaries, wages, overtime, bonuses, commissions, tips, self-employment income, pensions, annuities, Social Security benefits, disability benefits, workers' compensation, unemployment benefits, military allowances, rental income, investment income, and any other income regardless of whether it is taxed or reported to the IRS.
Income Deductions Allowed
Before calculating the support obligation, each parent may deduct certain expenses from gross income:
- Federal and state income taxes
- FICA (Social Security and Medicare) contributions
- Health insurance premiums for the parent
- Dental and vision insurance premiums
- Union dues
- Mandatory retirement contributions
- Child support paid for other children
- Alimony paid under court order
Average Child Support Payments in Massachusetts
Massachusetts parents pay significantly higher child support compared to other states due to the state's income-based formula and high cost of living. The average annual child support payment received in Massachusetts was $7,266 in 2022, ranking among the highest nationally. Adjusted for inflation through 2025, that amount equals approximately $7,870 in purchasing power. According to a 2019 Custody X Change study, the Massachusetts formula produces the highest payments in the country, with a typical payment of $1,200 per month compared to one-third of that amount in other states.
Child Support Payment Ranges by Income
| Combined Weekly Income | 1 Child | 2 Children | 3 Children |
|---|---|---|---|
| $500/week | $90-120 | $115-150 | $130-170 |
| $1,000/week | $200-250 | $280-340 | $330-400 |
| $2,000/week | $346 + 18% over $1,600 | $466 + 18% over $1,600 | $556 + 18% over $1,600 |
| $4,000/week | $700-850 | $950-1,100 | $1,100-1,300 |
| $8,654/week (max) | Guideline cap applies | Guideline cap applies | Guideline cap applies |
Note: These ranges are estimates based on the 2025 Child Support Guidelines Table A. Actual amounts depend on parenting time, childcare costs, health insurance, and other factors.
Low-Income Protections Under the 2025 Guidelines
Massachusetts protects low-income parents from child support orders that would push them below poverty levels. The 2025 Guidelines tie minimum payment thresholds to the Federal Poverty Guidelines, ensuring parents earning minimal income retain enough to meet basic needs.
Minimum Support Amounts by Income
| Weekly Gross Income | Presumptive Maximum Order |
|---|---|
| Up to $210/week | $12/week minimum |
| Up to $301/week | $15/week |
| $302-$391/week | $33/week |
| Above $391/week | Standard formula applies |
If the calculated child support amount equals 40% or more of the payor's available income, the parent may request a deviation from the guidelines based on financial hardship.
Shared Custody and Parenting Time Adjustments
Massachusetts applies different calculation formulas based on how parenting time is divided between parents. The standard formula assumes one parent has primary custody while the other parent has the child approximately one-third of the time.
The 33% Shared Custody Threshold
When both parents share custody and each has the child for at least 33% of parenting time, the shared custody adjustment applies. Under this formula:
- Each parent completes the Child Support Guidelines Worksheet
- Both parents' support obligations are calculated
- The parent with the higher obligation pays the difference to the other parent
For example, if Parent A's calculated weekly support is $500 and Parent B's is $400, Parent A pays $100 per week to Parent B.
50/50 Custody Calculations
In true 50/50 custody arrangements, both parents complete identical calculations. The higher-earning parent typically pays the difference between the two calculated amounts. Courts recognize that even with equal parenting time, income disparity often requires one parent to contribute financially to the other.
Impact of Parenting Time on Support Amount
The 2017 Guidelines eliminated the "hybrid" formula that previously applied to parenting time between 33% and 50%. Parents may still argue for deviations based on parenting time allocations, but the presumptive calculation no longer includes automatic adjustments for this middle range.
Childcare and Health Insurance Costs
Beyond the base support amount from Table A, Massachusetts child support includes additional expenses that parents share proportionally based on income.
Childcare Costs Under the 2025 Guidelines
The 2025 Guidelines raised the benchmark for reasonable childcare costs from $355 to $430 per week per child, reflecting a 26% increase in childcare costs across Massachusetts since 2021. Work-related or education-related childcare expenses are built directly into the support calculation. Summer camps, sports programs, and enrichment activities are treated as discretionary expenses and handled separately.
Health Insurance Requirements
Every child support order must include a provision for health care coverage under M.G.L. Chapter 208, § 28. The parent providing health insurance may deduct the reasonable cost of premiums from gross income. Courts allocate unreimbursed medical expenses (co-pays, deductibles, dental, vision, prescriptions) proportionally based on each parent's income rather than splitting them 50/50.
How Long Does Child Support Last in Massachusetts?
Massachusetts child support continues until specific events occur that trigger termination or modification of the order.
Standard Duration Rules
- Child support ends when the child turns 18 years old
- Support extends to age 21 if the child is domiciled with a parent and principally dependent on that parent for support
- Support may continue to age 23 if the child is enrolled full-time in an undergraduate educational program
- For children over 18, the Guidelines automatically reduce support by 25%
- Support terminates upon the child's marriage, military enlistment, or emancipation
College Expenses and Adult Children
Massachusetts courts may order parents to contribute to a child's college expenses beyond the basic support obligation. Under M.G.L. Chapter 208, § 28, the court considers each parent's financial ability, the child's academic performance, and the availability of financial aid when allocating educational costs.
Modifying Child Support in Massachusetts
Massachusetts allows modification of child support orders when material changes in circumstances occur after the original order was entered.
Grounds for Modification
Under the Massachusetts Child Support Guidelines, a child support order may be modified if:
- There is an inconsistency between the current order and the amount that would result from applying the current guidelines
- Health care coverage previously ordered is no longer available or affordable
- Health care coverage not previously available has become accessible
- A material and substantial change in circumstances has occurred
Common triggering events include job loss, significant income increase or decrease (courts often consider 25% change significant), changes in custody or parenting time, remarriage affecting household expenses, and changes in childcare or medical needs.
Filing for Modification
To modify child support that is part of a divorce judgment or custody order, the requesting parent must file a Complaint for Modification with the Massachusetts Probate and Family Court. The filing fee is $120 as of March 2026. The parent seeking modification bears the burden of proving the material change in circumstances.
Enforcing Child Support Orders in Massachusetts
The Massachusetts Department of Revenue Child Support Enforcement Division (DOR/CSE) has extensive authority to enforce support orders against non-paying parents.
Wage Garnishment
Wage garnishment is the primary enforcement tool in Massachusetts. Once a support order is in place, the DOR sends an income withholding order directly to the employer. Federal law limits garnishment to 50% of disposable income if the paying parent supports another family, and 60% if they do not. An additional 5% applies if payments are more than 12 weeks overdue.
License Suspension
Under M.G.L. Chapter 119A, § 16, the DOR may suspend a parent's:
- Driver's license
- Professional licenses (law, medicine, real estate, etc.)
- Recreational licenses (hunting, fishing)
Before suspension, the DOR must send an Annual Notice of Child Support Delinquency. Once the Final Determination of Delinquency issues, there are no hardship exceptions. License reinstatement requires either full payment of arrears or entering a payment plan and maintaining compliance.
Additional Enforcement Tools
The DOR employs multiple mechanisms to collect unpaid support:
- Federal and state tax refund interception
- Bank account seizure and levies
- Property liens on real estate
- Passport denial (arrears exceeding $2,500)
- Credit bureau reporting (damages credit score)
- Contempt of court proceedings (fines, incarceration up to 90 days)
Filing for Child Support in Massachusetts
Parents seeking child support in Massachusetts file with the Probate and Family Court in the county where either parent resides.
Residency Requirements
Massachusetts requires that if the cause of the divorce or separation occurred outside the state, the filing parent must have lived in Massachusetts continuously for at least one year before filing. If the cause occurred within Massachusetts, domicile (living with intent to remain) at the time of filing is sufficient.
Filing Fees and Costs
| Item | Cost |
|---|---|
| Custody/Support/Parenting Time Complaint | $120 |
| eFiling fee (one-time) | $22 |
| Summons (each) | $5 |
| Citation (each) | $15 |
| Register surcharge | $15 |
As of March 2026. Verify current fees with your local Probate and Family Court clerk.
Parents who cannot afford filing fees may submit an Affidavit of Indigency to request a fee waiver.
Required Documents
To file for child support, parents must complete:
- Complaint for Custody, Support, Parenting Time
- Financial Statement (short form for income under $75,000; long form above)
- Child Support Guidelines Worksheet
- Affidavit Disclosing Care or Custody Proceedings
Frequently Asked Questions
How much is child support in Massachusetts for one child?
Child support in Massachusetts for one child typically ranges from $200 to $500 per week for families with combined gross income between $50,000 and $150,000 annually. The exact amount depends on each parent's proportional share of combined income, parenting time allocation, and additional expenses like childcare and health insurance. The minimum payment is $12 per week for parents earning under $210 weekly gross income.
What is the average child support payment in Massachusetts?
The average annual child support payment received in Massachusetts was $7,266 in 2022, which equals approximately $606 per month. Adjusted for inflation through 2025, this equals about $656 monthly in purchasing power. Massachusetts consistently ranks among the highest child support states nationally, with payments often exceeding comparable states by 2-3 times.
How does Massachusetts calculate child support for two children?
Massachusetts calculates child support for two children using the same income shares formula but references a higher base amount from Table A of the Child Support Guidelines. For combined weekly income of $2,000, support for two children calculates as $466 plus 18% of income above $1,600. Generally, support for two children is approximately 30-40% higher than for one child.
Can Massachusetts child support be modified if I lose my job?
Yes, job loss constitutes a material and substantial change in circumstances that may justify modifying a Massachusetts child support order. You must file a Complaint for Modification with the Probate and Family Court and provide documentation of the income change. Courts typically consider a 25% income change significant enough to warrant review. However, modification is not automatic, and you must continue paying the current order until the court enters a new order.
What happens if I do not pay child support in Massachusetts?
Non-payment of child support in Massachusetts triggers enforcement actions by the DOR including wage garnishment (up to 60% of disposable income), driver's license suspension, professional license suspension, recreational license suspension, tax refund interception, bank account seizure, property liens, passport denial for arrears over $2,500, and credit bureau reporting. Chronic non-payment may result in contempt of court proceedings with penalties including fines and incarceration up to 90 days.
Does shared custody reduce child support in Massachusetts?
Yes, shared custody reduces child support when each parent has the child for at least 33% of parenting time. Under the shared custody formula, both parents complete the Guidelines Worksheet and the higher-earning parent pays the difference between the two calculated amounts. For example, if Parent A owes $500 weekly and Parent B owes $300, Parent A pays $200 per week rather than the full $500.
How long does child support last in Massachusetts?
Massachusetts child support generally continues until age 18, but extends to age 21 if the child is domiciled with a parent and principally dependent on that parent for support. Support may continue to age 23 if the child is enrolled full-time in an undergraduate educational program. For children over 18, the Guidelines automatically reduce support by 25%.
What income is included in Massachusetts child support calculations?
Massachusetts includes all gross income from any source in child support calculations regardless of tax treatment. This includes salaries, wages, overtime, bonuses, commissions, self-employment income, pensions, Social Security, disability benefits, workers' compensation, unemployment, military allowances, rental income, investment income, and imputed income if a parent is voluntarily unemployed or underemployed.
Can Massachusetts child support include college expenses?
Yes, Massachusetts courts may order parents to contribute to college expenses under M.G.L. Chapter 208, § 28. Child support can extend to age 23 for children enrolled full-time in undergraduate programs. Courts consider each parent's financial ability, the child's academic performance, and available financial aid when allocating educational costs beyond basic support.
Where do I file for child support in Massachusetts?
File for child support at the Probate and Family Court in the county where you or the other parent resides, or where either party is regularly employed. The filing fee is $120 for a Custody, Support, Parenting Time complaint as of March 2026. Parents may file in person, by mail, or electronically through the Massachusetts eFiling system. An Affidavit of Indigency may waive fees for those who qualify.