⚠️ This is a template, not legal advice. DadHelp is not a law firm. This checklist helps you prepare — it does not replace an attorney. Modification law is complex. Have a qualified MA family law attorney review your case before filing. Laws change — verify current rules at mass.gov.
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Step 1: Verify You Have Grounds
MA law (M.G.L. c. 208, § 28) requires both a material change in circumstances AND that modification is in the child's best interests. Check all that apply:
Job loss or significant income reductionLost your job, reduced hours, or took a pay cut. Need proof: termination letter, unemployment enrollment, pay stubs showing reduced income.
Significant income increase by other parentThe other parent's income has increased substantially, which may warrant a higher support obligation from them.
Change in parenting time / physical custodyYou now have more overnights (approaching 146+/year) or primary physical custody has changed.
Change in child's needsMedical needs, educational needs, or special circumstances have changed (e.g., new diagnosis, private school, therapy).
Other parent not following orderRepeated violations of existing order — missed payments, denied parenting time, etc.
3+ years since last order (guidelines review)MA guidelines are reviewed every 4 years. If it's been 3+ years, the numbers may have changed enough to justify modification.
Emancipation of another childOne child has emancipated (turned 18 + graduated, or turned 21+), changing the support calculation for remaining children.
New dependents / other support obligationsYou have a new child or other legal dependents that affect your ability to pay.
⚠️ Important: If your only reason is "I can't afford it" — that alone is NOT sufficient. You must show a material change in circumstances since the original order. If you lost income, file promptly — don't wait months and accrue arrears you can't pay.
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Step 2: Gather Documents
You'll need evidence to prove the change. Start collecting:
Current Child Support OrderCopy of the existing judgment/order you want to modify. Get it from the court or MassCourts.org.
Proof of income changeLast 4 pay stubs (showing current income), termination letter, unemployment benefit letter, W-2s from last 3 years.
Updated Financial StatementCJD 301S (income < $75K) or CJD 301L (income > $75K). Must be current within 45 days of filing.
Rule 410 mandatory self-disclosurePay stubs (last 3–4), tax returns (last 3 years), W-2s/1099s, bank statements, retirement account statements.
Proof of parenting time changeOvernight log showing current schedule vs. original order. Texts/emails showing any denied access.
Child's medical/educational recordsIf claiming changed needs: medical bills, IEP, therapy records, school enrollment.
2025 Child Support Guidelines Worksheet (CJD 304)Calculate what the new amount should be under current guidelines. Available at mass.gov.
Proof of current support paymentsBank records, DOR payment history, receipts showing you've been paying (or can't).
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Step 3: File the Right Forms
File at the Probate & Family Court where the original order was issued. Forms available at mass.gov.
Complaint for Modification (CJD 104)The main form. States what you want changed and why. Must be specific — cite the material change.
Financial Statement (CJD 301S or CJD 301L)Must be filled out completely and accurately. Signed under pains and penalties of perjury.
Child Support Guidelines Worksheet (CJD 304)Shows the new calculation. Use the 2025 guidelines (effective Dec 1, 2025).
Military Affidavit (TC0002)Required at filing. States whether the other parent is in the military.
Affidavit of Indigency (if needed)If you can't afford the $50 filing fee + $5 summons. Income ≤125% of poverty level or receiving MassHealth/SNAP/TAFDC/SSI.
Motion for Temporary Orders (CJD 400) — optionalIf you need a temporary modification while the case is pending. Requires 10 days' notice to other parent.
Filing fee: $50 + $5 summons = $55. Pay at clerk's office or via
eFileMA. If both parents agree, use
CJD 124 (Joint Petition) instead — cheaper, faster, no hearing required under Supplemental Rule 412.
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Step 4: Serve the Other Parent
Get a summons from the clerkThe court issues a summons when you file. It must be attached to the complaint.
Have the other parent servedBy sheriff, constable, or authorized person ($50–$75). You cannot serve them yourself.
File proof of serviceThe sheriff/constable gives you a return of service — file it with the court. Without it, your case stalls.
Keep copies of everythingMake 3 copies of every document: one for you, one for the court, one for the other parent.
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Step 5: Prepare for the Hearing
Organize evidence in a binderChronological, labeled, with tabs. Bring 3 copies of each document.
Prepare a clear statementWrite out what changed, when, and how it affects the child. Practice saying it in under 2 minutes.
Update your financial statementMust be current within 45 days of the hearing date. If anything changed since filing, update it.
Bring parenting time logIf claiming custody/parenting time change, bring your custody journal showing the current schedule.
Dress appropriatelySuit or sport coat with tie. "Proper dress required" — see court prep guide.
Arrive 30 minutes earlyAccount for security, parking, finding your courtroom.
Don't bring your phoneMany MA courthouses ban phones entirely. Leave it in your car.
Bring childcare for your kidsChildren should not be in the courtroom unless ordered by the judge.