Pennsylvania Child Support Guidelines Explained

Pennsylvania child support follows a statutory formula under Pa.R.Civ.P. 1910.16-1 through 1910.16-7. Courts have little discretion to deviate. Knowing how the calculation works tells you what to expect and what you owe or can claim.

How Pennsylvania Calculates Support

Pennsylvania uses an income shares model. The logic is straightforward: the child's support obligation is proportional to each parent's income. If both parents earned equally during the marriage, they share support equally. If one parent earned much more, they pay more.

Here's the framework:

Step 1: Determine each parent's gross income. This includes salary, wages, bonuses, self-employment income, rental income, Social Security (if the child receives it), and various other sources. It's "gross," so you don't deduct taxes.

Step 2: Apply deductions. From gross income, you deduct reasonable child support from other children, spousal support (alimony) the parent is actually paying, and Social Security taxes. These bring down the income used for calculation.

Step 3: Look up the guidelines table. Pennsylvania's statute includes a table showing the percentage of combined parental income that must go to child support based on the number of children. For example, two children require approximately 29 to 30 percent of combined income.

Step 4: Calculate each parent's proportional share. If Dad earns $60,000 and Mom earns $40,000 (combined $100,000), Dad pays 60 percent of the support obligation and Mom pays 40 percent. This applies whether one parent has primary custody or custody is shared.

Step 5: Account for custody time and health insurance. If one parent has primary custody, the non-custodial parent pays cash support to the custodial parent. If custody is shared, support may be offset. Health insurance costs are factored in separately.

The Guidelines Table

Here's how the percentage works with a real example.

Combined parental income: $10,000 per month. Two children. The guideline percentage for two children is approximately 30 percent. Basic child support obligation: $3,000 per month.

If Dad earns $7,000 and Mom earns $3,000 (Dad is 70 percent of combined income), Dad's share of the $3,000 obligation is $2,100. Mom's share is $900.

If Dad has primary custody, Mom pays Dad $2,100 per month. If custody is shared (let's say Dad has the kids 40 percent of the time), the obligation is adjusted downward because Dad is already spending money on the kids when he has them.

For higher incomes (combined income above $30,000 per month), the statute allows judges to deviate, and support can be adjusted based on the payor's ability to pay and other factors. These cases are less predictable because the guidelines cap out and judicial discretion increases.

What Counts as Income

Income includes obvious sources: W-2 wages, 1099 self-employment income, business income. It also includes bonuses, overtime, tips, rental income, interest and dividend income, capital gains, and distributions from business interests.

It does NOT automatically include gifts, inheritances, or one-time windfalls. But ongoing payments (like disability benefits, workers' compensation, or spousal support) do count.

If someone is voluntarily unemployed or underemployed (meaning they could earn more but choose not to), a court can impute income based on earning capacity. If a parent quits a $80,000 job to avoid child support, the court may order support based on the $80,000 they could still earn.

This gets contentious in custody cases where one parent genuinely changes jobs for lifestyle reasons unrelated to support avoidance. Courts look at intent. A parent who takes a lower-paying job because they want to spend more time with the child while custody is shared may not have income imputed. One who quits specifically to reduce support faces imputation.

Adjustments and Deviations

Healthcare costs: If one parent carries health insurance for the children, that premium is factored in. If neither carries insurance, the cost of independent coverage is split. Uninsured medical expenses are typically split based on the same income proportions.

Childcare costs: If the custodial parent incurs childcare expenses to work, the non-custodial parent may contribute a portion. This is often built into the support calculation.

Shared custody offsets: When custody is roughly equal (40 percent or more with each parent), the basic obligation is reduced because each parent is directly supporting the children during their time.

Extraordinary expenses: Private school, specialized medical or dental care, camps, or activities beyond typical childhood expenses may be added on top of the guideline support.

Deviations from guidelines: A judge may deviate from the guideline amount if applying it would be unjust or inappropriate. This requires written findings explaining the deviation. Common reasons: income above the guidelines cap, substantial mortgage obligations related to maintaining the child's home, other children the parent supports, or genuine hardship to the obligor.

Duration of Support

Child support continues until the child turns 18, but only if the child has graduated from high school. If the child is still in high school after age 18, support continues until graduation or age 19, whichever is earlier. So if your child turns 18 but is still a junior in high school, you continue paying until graduation, assuming that happens before age 19.

Support ends immediately upon the child's high school graduation, marriage, or emancipation. It does not automatically extend to college. If parents want to agree to college support, they can, but Pennsylvania doesn't require it unless the order specifically includes it.

Once the child turns 19, support terminates regardless of whether they're in school. Pennsylvania law is clear on this.

Modification: When Circumstances Change

Child support can be modified if there's been a substantial and continuing change in circumstances. This includes a significant change in either parent's income, a change in custody, loss of employment, or a new child by either parent.

The change must be substantial, generally at least 10 percent change in income, and it must be continuing (not temporary). A temporary layoff doesn't automatically reduce support. A permanent job loss does.

Either parent can petition for modification. If the payor's income dropped 15 percent due to an industry downturn and that change is expected to be long-term, a court will likely modify downward. If the payor deliberately reduced income to avoid support, courts are skeptical and may not modify.

Modifications are retroactive to the date of the filing of the modification petition, not to when circumstances actually changed. So file promptly if your situation changes.

Enforcement

If someone doesn't pay child support, enforcement mechanisms are serious. Contempt of court carries jail time. Wage attachments (garnishment) can be ordered on the obligor's paycheck. Professional licenses can be suspended. State and federal tax refunds can be intercepted and applied to arrears. If arrears become substantial, a warrant for arrest can be issued.

Pennsylvania's child support enforcement agency is aggressive. They pursue collections on behalf of custodial parents who apply for services. If you have court-ordered support and the other parent isn't paying, you can file a petition for contempt with the judge or let the enforcement agency pursue it.

Conversely, if you owe support and fall behind, addressing it quickly is crucial. You can seek modification if your circumstances genuinely changed, or work out a payment plan. Contempt judgments and license suspensions are serious consequences.

Calculating Your Own Obligation

If you know both parents' gross income and the number of children, you can estimate support using the guideline percentage and table. For precise calculation, you need actual deductions, healthcare costs, custody percentage, and any extraordinary expenses. An attorney can run the numbers and tell you what Pennsylvania guidelines require.

Many custody agreements include child support language that deviates from guidelines if both parents agree and the court approves. If you're negotiating a settlement, understanding guidelines gives you a baseline. You can agree to more or less, but the court will scrutinize substantial deviations and may reject them if they appear contrary to the child's best interest.

For more on how support and custody interact, see Child Support and Spousal Support (Alimony). If your circumstances have changed since an order was entered, Modifying Custody and Support Orders When Circumstances Change walks through the modification process.