Quick answer: In Pennsylvania, you can petition to modify child support at any time and it shall be granted on a material and substantial change in circumstances. Orders are also reviewed every three years and adjusted by the guidelines without proof of a change. A new order starts at filing; support already due cannot be remitted.
This Pennsylvania child support modification calculator applies 23 Pa.C.S. 4352. Enter your current order and the amount the guidelines give today (you can get it from the Pennsylvania child support calculator), say whether three years have passed or a material change exists, and it shows whether the order qualifies, the monthly gap and what it adds up to from filing.
Pennsylvania child support modification at a glance
| Rule | What Pennsylvania says |
|---|---|
| Change in circumstances | A petition may be filed at any time and shall be granted if the requesting party demonstrates a substantial change in circumstances (23 Pa.C.S. 4352(a)) |
| Three-year review | Each order is reviewed at least every three years on request, or automatically with a TANF assignment, and adjusted by the guidelines without proof of a change (4352(a.1)) |
| New guidelines | A new guideline amount from revised guidelines, or newly found income, may be a material and substantial change (Pa.R.C.P. 1910.19(a)) |
| Effective date | From the date of filing unless the order says otherwise (Pa.R.C.P. 1910.17(a)) |
| Earlier periods | No court may modify or remit support after its due date except for a period when a petition is pending; an earlier date needs a disability, misrepresentation or other compelling reason and prompt filing (4352(e)) |
| Incarceration | Incarceration other than for nonpayment is a material and substantial change that may warrant modification or termination where the obligor lacks verifiable income or assets (4352(a.2)) |
How does child support modification work in Pennsylvania?
- Know the two routes. See what counts as a substantial change in Pennsylvania.
- File early; the date of filing matters. See how to modify child support in Pennsylvania.
- Income problems and incarceration. See child support after job loss or incarceration in Pennsylvania and, for what stays owed, the Pennsylvania child support arrears calculator.
What does this modification calculator check?
The calculator checks whether either route applies (a three-year review, or a material and substantial change), shows the monthly gap against the guideline amount and the accrued difference from filing. Pennsylvania sets no percentage, so it cannot say whether a court will find a change substantial.
Frequently asked questions
What do I have to show to modify Pennsylvania child support?
A material and substantial change in circumstances, unless the order is at its three-year review, where the court adjusts it by the guidelines without proof of a change.
Is there a Pennsylvania percentage for child support modification?
Not in the statutes or rules we read.
From what date can Pennsylvania change child support?
From the date the petition was filed, unless the order says otherwise; earlier only for a compelling reason with prompt filing.
Does incarceration change Pennsylvania child support?
It is a material and substantial change that may warrant modification or termination where the obligor lacks verifiable income or assets, unless the incarceration is for nonpayment.
How often does Pennsylvania review child support?
At least once every three years on request, or automatically for assigned cases.