Updated for 2026 guidelines
Pennsylvania Child Support Arrears Calculator 2026
Pennsylvania does not use one automatic calculator rate for every support ledger. A court may award 6 percent interest, so this tool leaves the amount blank without the controlling order and award period.
Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
Check a Pennsylvania arrears balance
Estimated arrears with interest: $5,000.00
Interest of $0.00 under 42 Pa.C.S. 8101; 41 P.S. 202.
| Line item | Amount |
|---|---|
| Arrears principal42 Pa.C.S. 8101 (interest on judgments at the lawful rate from verdict/award or judgment date) (PA General Assembly (palegis.us)) | $5,000.00 |
| Interest not computed: no verified numeric rate (42 Pa.C.S. 8101; 41 P.S. 202)A Pennsylvania court may award the 6% lawful rate on overdue support, but the award is discretionary rather than automatic on every support ledger. No interest is computed without the controlling court award and award period.42 Pa.C.S. 8101 (interest on judgments at the lawful rate from verdict/award or judgment date) (PA General Assembly (palegis.us)) | $0.00 |
| Arrears principal plus interest42 Pa.C.S. 8101 (interest on judgments at the lawful rate from verdict/award or judgment date) (PA General Assembly (palegis.us)) | $5,000.00 |
Assumptions
- Accrual period expressed as 12 month(s); partial months prorate.
- No verified numeric interest rate for this state; interest shown as 0 and the result is an estimate of principal only.
Estimate only. The court or state agency calculation controls.
Pennsylvania arrears interest under 42 Pa.C.S. 8101; 41 P.S. 202; rules last reviewed 2026-08-28.
How arrears work in Pennsylvania
Arrears are support payments that came due and were not paid. In Pennsylvania every payment becomes a fixed debt on its due date, tracked on the state PACSES system through the county domestic relations section that runs the case.
Pennsylvania does not apply one automatic interest rate to every support ledger. A 2025 published Superior Court opinion confirms that a court can award the 6 percent lawful rate on overdue support, but that award is discretionary and case-specific.
Because the court decides whether interest applies and the period it covers, a principal-only calculator cannot safely select the rate window. This tool preserves principal and explains the missing decision instead of converting a blank rate to zero.
The balance is firm in the other direction too. Under 23 Pa.C.S. section 4352, overdue support becomes a lien, and arrears cannot be modified retroactively: a court can change support going forward from the filing date of a petition, but it cannot erase payments that already came due.
- Automatic interest on arrears
- No universal automatic calculator ratesource
- Legal rate on money judgments
- 6% per year (42 Pa.C.S. § 8101; 41 P.S. § 202)source
- Application to support arrears
- Discretionary court award; not computed without the order and periodsource
- Retroactive modification
- Barred; arrears cannot be wiped out for past periods (23 Pa.C.S. § 4352)source
How to use this estimate
Enter the arrears principal only to preserve the balance you are reviewing. The tool reports no computed interest because a court award and award period are required; that is a fail-closed result, not a 0% legal claim.
If a court has entered a money judgment on your arrears and ordered interest, the 6 percent legal rate would apply to that judgment. That is a case-specific court decision; read your judgment paperwork rather than assuming it happened.
The county domestic relations section keeps the ledger that counts. Payments through income withholding, tax refund offsets, and direct payments all move the PACSES balance in ways a single-number estimate cannot track.
What this estimate includes
- The arrears principal you enter, unchanged
- An explanatory line stating that no universal automatic rate is modeled
- The statutory citations for the legal rate, in case a judgment applies to you
What it leaves out
- Interest not established by the controlling court award
- Judgment interest a court may have ordered in your specific case
- Partial payments, offsets, and the running PACSES ledger
- New support that keeps accruing under the current order
Pennsylvania arrears FAQs
Do Pennsylvania child support arrears earn interest?
A court may award Pennsylvania’s 6 percent lawful rate on overdue support, but that is discretionary rather than an automatic rate on every support ledger. Read the controlling order and award period.
What is the 6 percent rate people mention?
Pennsylvania’s lawful rate is 6 percent a year under 41 P.S. § 202 and 42 Pa.C.S. § 8101. A 2025 published Superior Court opinion confirms a discretionary award can apply to overdue support; it still does not create one automatic amount for every case.
Can old arrears be reduced or forgiven?
A court cannot rewrite the past. Under 23 Pa.C.S. § 4352, support can be modified only from the date a modification petition was filed, so payments that already came due stay owed. The person owed the money can agree to compromise arrears owed to them, and the state has separate processes for arrears assigned to it, but no judge can retroactively lower a past-due balance.
Is unpaid support a lien in Pennsylvania?
Yes. Overdue support becomes a lien by operation of law under 23 Pa.C.S. § 4352, which means it can attach to real estate and follow the paying parent until resolved. That is one reason the balance matters even when no interest runs on it.
Why does this calculator show zero interest?
The result line preserves principal but does not declare a 0 percent rule. The calculator lacks the case-specific court award and period needed to compute discretionary interest safely.
Where do I find my real arrears balance?
From the county domestic relations section handling your case or through the Pennsylvania child support program’s online portal. The PACSES ledger reflects every charge, payment, and adjustment, and it is the figure courts and enforcement actions use.
Official sources
Official sources last verified: .
- 42 Pa.C.S. 8101 (interest on judgments at the lawful rate from verdict/award or judgment date)
PA General Assembly (palegis.us) Last checked
- 2025 published opinion affirming discretionary interest on overdue support
Superior Court of Pennsylvania Last checked
- 23 Pa.C.S. 4352 (continuing jurisdiction over support orders; liens for overdue support; (e) no retroactive modification of arrears)
PA General Assembly (palegis.us) Last checked
Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
Changelog: page first published with the no-automatic-interest rule and the money judgment nuance. Material changes are dated in the update log.