How Does Child Support Work in Pennsylvania?

Child support in Pennsylvania works through an income shares formula: the state estimates what two parents at their combined income level would spend raising their children in one household, then splits that figure between them based on each parent’s share of the income. Both parents owe support whether or not they were ever married. The custodial parent meets their share through direct spending on the child; the other parent pays a monthly amount, usually withheld straight from their paycheck. Orders are issued and enforced through the Domestic Relations Section of the county Court of Common Pleas.¹

How the Amount Is Calculated

Two numbers drive the calculation: the parents’ combined monthly net income and the number of children. A schedule in Rule 1910.16-3 converts those figures into a basic support obligation covering food, housing, transportation, clothing, and miscellaneous needs, plus the first $250 per child per year in unreimbursed medical costs.² Each parent is responsible for a percentage of that total equal to their percentage of combined net income. If one parent earns 60% of the combined income, they owe 60% of the basic obligation.

Net income starts with gross earnings from all sources and subtracts federal, state, and local taxes, Social Security and Medicare, and mandatory union dues. It also reflects support a parent already pays for children or former spouses from other relationships.³

A parent who is voluntarily unemployed or underemployed doesn’t get the benefit of their low paychecks. The court can assign an earning capacity based on what the parent could realistically earn, weighing work history, skills, education, age, health, criminal record, local job availability, and prevailing wages. The court must explain its chosen figure in writing.³

Expenses Added on Top of Basic Support

The schedule amount isn’t the whole order. Several categories get allocated between the parents in proportion to income and added to the basic obligation:

Health insurance premiums covering the child, with the non-carrying parent’s share added to or subtracted from the obligation depending on who holds the policy.
Reasonable childcare costs needed for a parent to work or go to school, reduced to reflect the federal child care tax credit available to the eligible parent whether or not they claim it.
Annual unreimbursed medical expenses above $250 per person, including co-pays, deductibles, dental, vision, orthodontia, and mental health care.
Private school tuition, summer camp, and similar costs when the court decides allocation is appropriate.

The court can roll a parent’s share of these costs into the monthly payment, require direct payment to the provider, or require reimbursement to the other parent.⁴

How Custody Time Changes the Number

When the paying parent has the child for 40% or more of overnights in a year (about 146 nights), a rebuttable presumption applies that the basic obligation should go down. The formula takes the obligor’s percentage of overnights, subtracts 30, and reduces their share of basic support by that difference. A parent with 45% of overnights gets a 15% reduction; a parent with exactly 50% gets 20%.⁵

In a true 50/50 arrangement, the higher-earning parent is the obligor. The court will not order the lower earner to pay the higher earner. If the straight calculation would leave the custodial household with a larger combined share of net income than the noncustodial household, the court adjusts the obligation so both households end up with equal shares.⁵

Opening a Case

To get a support order, file a complaint for support with the Domestic Relations Section of your county Court of Common Pleas. Each of Pennsylvania’s 67 counties has one. You can file online through the Pennsylvania Child Support Program website or apply in person at your local office, and there is generally no filing fee.⁶

A support conference with a hearing officer is usually scheduled within about four weeks of filing. Both parents bring financial documentation: pay stubs, tax returns, proof of expenses, insurance costs, and childcare bills. The officer runs the guideline calculation and recommends an amount. If both parents accept it, that becomes the order. If either objects, the case moves to a judge for a full hearing.

If paternity hasn’t been established and the father disputes it, the court can order genetic testing. A result showing 99% or greater probability creates a legal presumption of paternity that can only be overcome by clear and convincing evidence that the test was unreliable.¹

How Payments Are Collected

Payments flow through the Pennsylvania State Collection and Disbursement Unit (PA SCDU), a centralized clearinghouse that tracks every dollar. Most orders include income withholding, meaning the amount comes directly out of the paying parent’s wages before the paycheck is issued. Employers send the withheld funds to PA SCDU electronically.⁷

Withholding is mandatory on all orders unless the paying parent is current (owes less than one month’s obligation in arrears) and either the court finds good cause to waive it or the parties have a written agreement for a different arrangement. Most orders start with automatic withholding in place.¹

What Happens If a Parent Doesn’t Pay

Pennsylvania’s enforcement powers are broad, and the Domestic Relations Section can use most of them without going back to court first. Available tools include:

Attaching wages, unemployment compensation, workers’ compensation, and other government benefits.
Freezing and seizing bank accounts, intercepting lawsuit settlements and judgments, and attaching retirement funds.
Placing liens on real estate or personal property and directing the sheriff to sell it.
Adding up to a 10% penalty on any amount overdue by 30 days or more, if the court finds the arrearage was willful.

When a parent owes at least three months of support and income attachment hasn’t worked, the Domestic Relations Section can also petition to suspend their driver’s license, professional license, or recreational license. The court can hold a nonpaying parent in contempt, which carries possible fines and jail time.¹

Federal enforcement adds another layer. The Treasury Offset Program intercepts federal tax refunds to cover past-due support, kicking in at $150 in arrears if the family has received TANF for the child and $500 otherwise. And once arrears hit $2,500, the paying parent’s U.S. passport can be denied, revoked, or restricted.⁸ That threshold catches people off guard; the first warning sometimes comes at the airport.

Changing the Order

Either parent can petition to modify support when something material changes: a significant income shift up or down, a change in custody time, new childcare or medical expenses, or a child aging out. File the petition with the court that issued the original order. Modifications take effect from the filing date, not from the date the circumstances changed, so waiting costs money.

The Domestic Relations Section also sends both parents a notice every three years inviting a review. For families receiving public assistance, the three-year review is automatic. You don’t need to wait for the notice to file.

When Support Ends

Support generally lasts until the child turns 18 or graduates from high school, whichever comes later. Parents are liable for the support of unemancipated children who are 18 or younger.¹ Support can end sooner if the child marries, joins the military, or is otherwise emancipated by the court.

Support may continue past 18 in narrow situations. The statute says parents “may be” liable for the support of children over 18, and Pennsylvania courts have applied that to children with severe physical or mental disabilities that prevent self-support. Pennsylvania does not require parents to pay for college through the child support system, though parents can agree to contribute in a separate written agreement.

The order doesn’t shut off on its own when the child ages out. The paying parent needs to file a petition to end the obligation; skipping that step leads to continued withholding and avoidable arrears. Any balance already owed when the child ages out survives, and remains enforceable.

When the Other Parent Lives in Another State

If one parent lives in Pennsylvania and the other lives elsewhere, the Uniform Interstate Family Support Act (UIFSA) applies. Every state has adopted it, and its central rule is one state, one order: only one state’s order controls at a time, and other states must honor it. The state that issued the original order keeps exclusive authority to modify it as long as either parent or the child still lives there. To enforce a Pennsylvania order elsewhere, you register it in the other state by filing copies of the order, a sworn statement of arrears, and identifying information for the other parent. The other parent has 20 days to contest; failing to respond confirms the order and makes the stated arrears enforceable.

Taxes and Who Claims the Child

Child support is neither deductible for the parent paying it nor taxable to the parent receiving it. The dependent question is separate. Under IRS rules, the parent the child lived with for more than half the year generally claims the child and the Child Tax Credit, which is usually the custodial parent.⁹ The custodial parent can release the claim to the other parent by signing IRS Form 8332, and many custody agreements alternate the claim year to year. If your order addresses it, follow the order, but note that the IRS applies its own residency test regardless of what a state court says, so Form 8332 is the piece of paper that actually controls the federal claim.

1
Pennsylvania General Assembly. Pennsylvania Code Title 23 Chapter 43 – Support Matters Generally
2
Pennsylvania Code and Bulletin. Pennsylvania Code Rule 1910.16-1 – Support Obligation
3
Pennsylvania Code and Bulletin. Pennsylvania Code Rule 1910.16-2 – Calculation of Monthly Net Income
4
Pennsylvania Code and Bulletin. Pennsylvania Code Rule 1910.16-6 – Basic Support Obligation Adjustments
5
Pennsylvania Code and Bulletin. Pennsylvania Code Rule 1910.16-4 – Calculation of Support
6
Department of Human Services. Bureau of Child Support Enforcement
7
Pennsylvania Department of Human Services. Pennsylvania Child Support Program – Payment Options
8
Administration for Children and Families. Passport Denial Program 101
9
Internal Revenue Service. Child Tax Credit