How to Modify Child Support in Pennsylvania
Reviewed by DocDraft Legal Team · Pennsylvania · Last updated September 21, 2026
In Pennsylvania, changing an existing child support order does not require you to clear a fixed percentage; a court changes the amount when you show a material and substantial change in circumstances since the last order (Pa.R.C.P. 1910.19). A child support modification is a court order that raises or lowers an existing support obligation after something changes, such as a job loss, a raise, or a new custody schedule. Pennsylvania sets support under a statewide income shares guideline tied to both parents' net incomes and the custody arrangement (Pa.R.C.P. 1910.16-1), so a real change in income or parenting time can make the current amount too high or too low. You ask for a change by filing a Petition for Modification of an Existing Support Order with the Domestic Relations Section of the Court of Common Pleas in the county that issued your order, or electronically through the Pennsylvania Child Support Program website. A change takes effect only back to the date you file your petition, not to when your circumstances changed (Pa.R.C.P. 1910.17), so support that already came due generally cannot be reduced. The Domestic Relations Section also sends a review notice about every three years. Keep paying your current order until the court changes it. Attorney review of your filing is available through DocDraft.
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Where are you with changing your child support order?
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How do I modify child support in Pennsylvania?
File a Petition for Modification of an Existing Support Order with the Domestic Relations Section of the Court of Common Pleas that issued your order, or file electronically through the Pennsylvania Child Support Program website. You must specifically state the material and substantial change in circumstances the request is based on (Pa.R.C.P. 1910.19).
How much does income have to change to modify child support in Pennsylvania?
Pennsylvania sets no fixed percentage or dollar trigger for a court modification. You must show a material and substantial change in circumstances since the last order (Pa.R.C.P. 1910.19). A significant, ongoing change in either parent's income or a new custody schedule can qualify. A revised state guideline amount may itself count.
How far back can a child support change go in Pennsylvania?
A modification is effective only back to the date you file your petition, not to when your circumstances changed (Pa.R.C.P. 1910.17). Support that already came due generally cannot be reduced, so filing promptly protects you. A narrow exception applies if a disability or another party's misrepresentation prevented earlier filing.
Which court handles child support modifications in Pennsylvania?
The Domestic Relations Section of the Court of Common Pleas in the county that issued your order handles modifications. You can visit that office to file a Petition for Modification, or file electronically through the Pennsylvania Child Support Program website. The office also sends a review notice about every three years.
Pennsylvania child support modification at a glance
In Pennsylvania, a child support modification is a court order that raises or lowers an existing support obligation after a change, and the state sets no fixed percentage you must clear; you show a material and substantial change in circumstances since the last order (Pa.R.C.P. 1910.19). Support follows a statewide income shares guideline tied to both parents' net incomes and the custody schedule (Pa.R.C.P. 1910.16-1), so a real change in income or parenting time can justify a new amount. You file a Petition for Modification of an Existing Support Order with the Domestic Relations Section of the Court of Common Pleas that issued your order, or electronically through the Pennsylvania Child Support Program website. A change applies only back to the date you file, so support that already came due generally cannot be reduced (Pa.R.C.P. 1910.17).
Lowering a Pennsylvania order after lost hours
Suppose a Pennsylvania parent lost overtime hours and wants to lower a support order set two years ago, when Pennsylvania asks only for a material and substantial change in circumstances rather than a fixed percentage (Pa.R.C.P. 1910.19). The parent completes a Petition for Modification of an Existing Support Order, gathers recent pay stubs showing the lower income, and files with the Domestic Relations Section of the Court of Common Pleas that issued the order. Because a change applies only back to the filing date (Pa.R.C.P. 1910.17), the parent files right away instead of waiting, and keeps paying the current amount until a new order is entered. At the support conference the officer recalculates support under the guideline and enters a lower order effective from the filing date. Attorney review of your filing is available through DocDraft.
Relevant Laws
23 Pa.C.S. 4352 (continuing jurisdiction over support orders)
Gives the court that made a support order continuing jurisdiction to increase, decrease, modify, or rescind it, and provides that a petition for modification may be filed at any time and shall be granted on a showing of a substantial change in circumstances.
Pa.R.C.P. 1910.19 (modification; substantial change in circumstances)
Requires a petition for modification or termination of an existing support order to specifically aver the material and substantial change in circumstances the petition is based on, and provides that a new guideline amount may itself constitute a material and substantial change.
Pa.R.C.P. 1910.17 (effective date of a support order; retroactivity)
Provides that an order of support shall be effective from the date of the filing of the complaint or petition for modification unless the order specifies otherwise, with a narrow exception where the petitioner was precluded from filing earlier.
Pa.R.C.P. 1910.16-1 (statewide support guideline)
Establishes Pennsylvania's statewide income shares support guideline, under which the amount of child support is based on the combined monthly net incomes of both parents and the custody arrangement, and applies when support is recalculated on a modification.
Regional Variances
Pennsylvania child support modification rules at a glance
Qualifying threshold
Pennsylvania sets no fixed percentage or dollar trigger for a court modification; you show a material and substantial change in circumstances since the last order (Pa.R.C.P. 1910.19). A new guideline amount from revised support guidelines may itself count as a material and substantial change.
Where to file
The Domestic Relations Section of the Court of Common Pleas in the county that issued your order handles modifications. Registered users can also file electronically through the Pennsylvania Child Support Program website E-Services feature.
Modification form
You file a Petition for Modification of an Existing Support Order. Pennsylvania has no single statewide numbered form; the Domestic Relations Section that issued your order provides the petition, and staff can help you complete it.
Retroactivity
A modification is effective from the date you file the petition, not from when your circumstances changed (Pa.R.C.P. 1910.17). Support that already came due generally cannot be reduced. A narrow exception applies where the petitioner was precluded from filing earlier.
Periodic review
The Domestic Relations Section sends each parent a notice about every three years asking whether they want the order reviewed, consistent with federal rules, and you can also file a petition sooner when a substantial change occurs.
Suggested Compliance Checklist
Gather proof of your changed circumstances
Before you file days after startingCollect recent pay stubs, tax returns, and proof of the change (job loss, income change, or a new custody schedule) that shows a material and substantial change in circumstances (Pa.R.C.P. 1910.19). Attorney review of your filing is available through DocDraft.
Complete the Petition for Modification
As soon as your circumstances change days after startingFill out the Petition for Modification of an Existing Support Order, specifically stating the material and substantial change your request is based on. Pennsylvania has no single statewide form number; the Domestic Relations Section that issued your order provides the petition.
File with the Domestic Relations Section
Promptly (the change dates back to filing) days after startingFile your petition with the Domestic Relations Section of the Court of Common Pleas that issued your order, or file electronically through the Pennsylvania Child Support Program website. Because a change applies back only to your filing date, file promptly (Pa.R.C.P. 1910.17).
Estimate the new guideline amount
Before the conference days after startingUsing both parents' monthly net incomes and the custody schedule, estimate what the statewide income shares guideline would produce now (Pa.R.C.P. 1910.16-1). This tells you whether a modification is likely to raise or lower your current amount.
Attend the support conference
On your conference date days after startingAttend the conference scheduled by the Domestic Relations Section with your income proof and evidence of the change. If the parties do not agree, the matter proceeds to a hearing before a judge or hearing officer who recalculates support under the guideline.
Get the new order effective from filing
When the order is entered days after startingConfirm the new order is effective back to your filing date, not to when your circumstances changed (Pa.R.C.P. 1910.17). Keep paying your current order until the new one is entered to avoid building arrears while the petition is pending.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Gather proof of your changed circumstances | Collect recent pay stubs, tax returns, and proof of the change (job loss, income change, or a new custody schedule) that shows a material and substantial change in circumstances (Pa.R.C.P. 1910.19). Attorney review of your filing is available through DocDraft. | - | Before you file |
| Complete the Petition for Modification | Fill out the Petition for Modification of an Existing Support Order, specifically stating the material and substantial change your request is based on. Pennsylvania has no single statewide form number; the Domestic Relations Section that issued your order provides the petition. | - | As soon as your circumstances change |
| File with the Domestic Relations Section | File your petition with the Domestic Relations Section of the Court of Common Pleas that issued your order, or file electronically through the Pennsylvania Child Support Program website. Because a change applies back only to your filing date, file promptly (Pa.R.C.P. 1910.17). | - | Promptly (the change dates back to filing) |
| Estimate the new guideline amount | Using both parents' monthly net incomes and the custody schedule, estimate what the statewide income shares guideline would produce now (Pa.R.C.P. 1910.16-1). This tells you whether a modification is likely to raise or lower your current amount. | - | Before the conference |
| Attend the support conference | Attend the conference scheduled by the Domestic Relations Section with your income proof and evidence of the change. If the parties do not agree, the matter proceeds to a hearing before a judge or hearing officer who recalculates support under the guideline. | - | On your conference date |
| Get the new order effective from filing | Confirm the new order is effective back to your filing date, not to when your circumstances changed (Pa.R.C.P. 1910.17). Keep paying your current order until the new one is entered to avoid building arrears while the petition is pending. | - | When the order is entered |
Frequently Asked Questions
A significant, involuntary income drop can be a material and substantial change supporting a modification, but you must file a Petition for Modification to change the amount; support keeps accruing at the old rate until a new order is entered (Pa.R.C.P. 1910.17). A hearing officer may consider your earning capacity. Do not simply stop paying.
No. Either parent can file a Petition for Modification on their own, and the other parent receives notice and can respond at the support conference. If both parents agree on a new amount, they can present it for approval. The Domestic Relations Section still applies the state guideline (Pa.R.C.P. 1910.16-1).
After you file the petition, the Domestic Relations Section schedules a support conference, often several weeks out depending on the county. An agreed change can resolve at the conference, while a contested one goes to a hearing. Because the change dates back only to filing, filing promptly protects you (Pa.R.C.P. 1910.17).
Registered users can file a Petition for Modification electronically through the Pennsylvania Child Support Program website E-Services feature, rather than visiting the office. You still must state the material and substantial change in circumstances your request is based on (Pa.R.C.P. 1910.19), and the Domestic Relations Section processes the petition.
A modification changes support only from your filing date forward (Pa.R.C.P. 1910.17). Support that already came due, called arrears, generally cannot be reduced or erased by a modification, and it continues to be owed. Keep paying your current order to avoid building arrears while your petition is pending.
You can file a Petition for Modification whenever a material and substantial change in circumstances occurs. Separately, the Domestic Relations Section sends each parent a notice about every three years asking whether they want the order reviewed, consistent with federal rules. There is no limit on filing when circumstances genuinely change.
Incarceration, except for nonpayment of support, may be treated as a material and substantial change in circumstances that supports modifying an order (Pa.R.C.P. 1910.19). The paying parent still must file a Petition for Modification; the obligation does not change on its own, and unpaid support continues to accrue until an order is entered.
The Domestic Relations Section recalculates support using Pennsylvania's statewide income shares guideline, based on both parents' monthly net incomes and the custody schedule (Pa.R.C.P. 1910.16-1). A conference officer reviews the figures first, and if the parties disagree, a judge or hearing officer sets the new amount at a hearing.
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