What Pennsylvania Child Support Costs for One Child

Pennsylvania does not set a fixed dollar amount for one child

Pennsylvania child support is calculated using the Income Shares Model, which means the amount depends on both parents' gross monthly income, not on a preset table. The state publishes guidelines that show what percentage of combined income goes to child support — currently 17% for one child — but the actual dollar amount you owe or receive varies based on what both parents earn.

A parent earning $2,000 per month and another earning $3,000 per month will have a different support obligation than two parents earning $4,000 each, even though both scenarios involve one child. The court uses the combined income figure, applies the 17% guideline, and then divides that amount between the parents based on their individual income shares.

Pennsylvania courts can deviate from the guideline amount if circumstances warrant it — such as shared custody, significant assets, or special needs — but the guideline itself is the starting point for any calculation.

Key Takeaways

• Pennsylvania uses 17% of combined parental gross income as the guideline for one child, not a fixed dollar amount.
• The actual payment depends on both parents' income and how the court divides the obligation between them.
• Income includes wages, salary, self-employment earnings, rental income, and some benefits, but definitions vary by source type.
• The paying parent's obligation can change if either parent's income changes significantly or custody arrangements shift.
• Courts can order amounts above or below the guideline if the case has unusual circumstances like shared custody or special needs.

How Pennsylvania calculates the 17% guideline

The calculation starts with gross monthly income from both parents. Gross income includes wages and salary, self-employment income, rental income, Social Security benefits (in some cases), workers' compensation, unemployment benefits, and certain other sources. It does not include child support received from another relationship, TANF (Temporary information for Needy Families), or SSI (Supplemental Security Income).

Once you have both parents' gross monthly income, you add them together to get the combined income. Multiply that combined figure by 0.17 (the 17% guideline for one child). That result is the total child support obligation. The court then divides this obligation between the parents based on each parent's percentage of the combined income.

For example, if Parent A earns $2,500 per month and Parent B earns $1,500 per month, the combined income is $4,000. Seventeen percent of $4,000 is $680. Parent A's share of income is 62.5%, so Parent A would be responsible for $425 of the $680. Parent B's share is 37.5%, so Parent B would be responsible for $255. The parent without primary custody typically pays the other parent the difference.

What counts as income for child support purposes

Pennsylvania's definition of income for child support is broader than just paychecks. The state includes wages, salary, bonuses, commissions, self-employment net income, rental income, interest and dividend income, capital gains, Social Security retirement benefits, workers' compensation, unemployment insurance benefits, disability benefits, and income from trusts or annuities.

Income does not include TANF, SSI, food stamps, or child support money you receive for a different child. If you are self-employed, the court uses your net income (revenue minus reasonable business expenses) rather than gross revenue. If you own a business, the court may look at tax returns, profit-and-loss statements, and bank records to determine your actual income.

If a parent is voluntarily unemployed or underemployed — meaning they could earn more but choose not to — the court may impute income, or assign an income level based on their work history, education, or local job market. This prevents a parent from lowering their support obligation by quitting a job or taking a lower-paying position.

When the 17% guideline changes

The 17% figure applies when one parent has primary custody and the other pays support. If both parents share custody equally (50/50), the guideline percentage may be different, and the calculation becomes more complex because both parents may owe support to each other. Pennsylvania courts use an offset method in shared custody cases, meaning each parent's obligation is calculated separately and then one pays the net difference to the other.

The guideline can also change if combined parental income exceeds a certain threshold. Pennsylvania adjusts this threshold periodically; you can find the current cap on the Pennsylvania Court Administration website or by contacting your local domestic relations office. When income is above the cap, the court has discretion to explore the guideline percentage or order a different amount based on the factors in the case.

Courts may also order an amount above or below the guideline if the case involves special circumstances: a child with significant medical or educational needs, a parent with substantial assets, a parent receiving substantial gifts or inheritances, or other factors the court finds relevant. Any deviation from the guideline must be documented in the court order with a written explanation.

How to find out what you owe or are owed

If you have an existing child support order, the amount is listed in your court order or in the Pennsylvania Child Support Enforcement (CSE) system. You can contact your county's domestic relations office to request a copy of your order or to ask what amount is currently on record. The office address and phone number are available through the Pennsylvania Court Administration website, organized by county.

If you do not have an order yet and want to know what the guideline amount would be, you can use the Pennsylvania Child Support Estimator, a calculator provided by the state that applies the 17% guideline based on income figures you enter. This gives you an estimate, but it is not a legal information — only a court order sets your actual obligation.

If you believe your income has changed significantly since your order was issued, either parent can request a modification. The court will recalculate based on current income and may adjust the amount up or down. A modification requires filing a petition with the court; you do not need a lawyer, but the process varies by county.

Income changes and modification requests

Child support orders are not permanent. If either parent's income changes by 10% or more, or if custody changes, either parent can ask the court to modify the amount. You file a petition for modification with your county's domestic relations office or through the court directly. The court will then recalculate based on current income and issue a new order.

Income decreases due to job loss, illness, or business failure are common reasons for modification. Income increases — from a raise, a new job, or a bonus — can also trigger a modification request from the other parent. The court looks at whether the change is permanent or temporary and whether the parent caused the change voluntarily.

If you stop paying because you believe the amount is wrong, you can still owe back support (called arrears) even after a modification is granted. The safer approach is to request a modification first, then pay the new amount once the court issues a new order. If you cannot afford to pay while waiting for a hearing, contact your domestic relations office to discuss your options.

Frequently Asked Questions

Does Pennsylvania have a minimum child support amount?

Pennsylvania does not set a flat minimum, but courts rarely order less than $50 per month for one child. If both parents have very low income, the court may order a nominal amount or defer payment until income increases. The guideline calculation (17% of combined income) is the starting point, and deviations must be documented in the court order.

What if the paying parent is self-employed or has irregular income?

The court uses net self-employment income (after business expenses) averaged over the past two to three years, based on tax returns and business records. If income is highly irregular, the court may average it or use the most recent year as a baseline. You must provide tax returns, profit-and-loss statements, and bank records to support your income claim.

Can child support be modified if I lose my job?

Yes, job loss is grounds for modification. You must file a petition with the court and show that the job loss was involuntary. The court will not reduce support when ready; you must wait for a hearing and a new order. If you are unemployed, the court may impute income based on your work history or local job market rather than order zero support.

Does shared custody change the 17% guideline?

Yes. In 50/50 shared custody, the guideline percentage may differ, and the court uses an offset calculation where each parent's obligation is computed separately and one parent pays the net difference. The exact percentage depends on the custody arrangement and your county's interpretation of shared custody.

Is child support the same in every Pennsylvania county?

The guideline percentage (17% for one child) is the same statewide, but how courts explore it, handle deviations, and calculate shared custody can vary slightly by county. The underlying math is consistent, but local court practices and judges' discretion may affect the final order.