What to do when your income drops or rises

A layoff, a pay cut, a promotion or a new job can change a family’s finances almost overnight. A child support order doesn’t follow along on its own. It stays at the amount a court or agency set until someone asks for a change and the change is approved. That is true whether income falls or rises, and whichever parent’s income moves.

This guide explains what happens to support when income changes, how states decide whether a change is big enough, how voluntary and involuntary drops are treated, and what to gather before you ask. It is general information, not legal advice. Any new figure is a guideline amount, and courts can deviate from the guidelines.

Support doesn’t change on its own

An order keeps running at its current amount until it is modified, and federal law makes the timing strict. Under 42 U.S.C. § 666(a)(9), each support payment becomes a judgment on the date it falls due, and no state may change it retroactively. The one exception lets a state reach back to the date the other parent was notified of a pending request to modify, and no earlier.

The effect on a parent whose income drops is easy to miss. If you lose your job in March and ask for a review in September, the full amount for the months before the other parent was notified generally stays owed. Anything unpaid becomes arrears, and many states charge interest on it. The same rule works against a receiving parent who waits: an increase generally can’t reach back to months before the request either. The guide to retroactive child support explains how far back a change can reach in different states.

So the first step is the same in almost every case: ask for a change promptly, make sure the other parent is properly notified, and keep paying what you can through the official payment channel while the request is pending, so every payment is on record. The arrears and interest calculator shows how a shortfall adds up in the meantime. An informal agreement between the parents to pay less doesn’t change the order; only a court or agency can.

How big a change has to be

Not every change in income leads to a new order. Every state accepts a substantial change in circumstances as grounds for modification, and many turn that into a test: work out the guideline amount on current incomes, compare it with the existing order, and presume a change is warranted if the difference reaches a set percentage, a set dollar amount, or both. Federal rules expressly let states set this kind of reasonable quantitative standard for agency reviews (45 CFR 303.8(c)).

Among the states this site covers, 38 use a percentage test of some kind. The most common figure is 15%, used by 15 states; 12 use 10% and 9 use 20%. Some pair the percentage with a dollar figure. Florida requires a difference of at least 15% and at least $50 a month, while Texas accepts either 20% or $100, provided it has been at least three years since the order was made or last modified.

Others, including Pennsylvania and Georgia, set no fixed figure, so the parent asking for the change has to show that circumstances have changed substantially. Several thresholds apply only to reviews by the state child support agency, and some states add a time test. Nebraska’s condition, for example, reads: The change in financial circumstances has lasted 3 months and can reasonably be expected to last at least 6 more months.

That reflects a wider point. Courts look for changes that are substantial and continuing. A short gap between jobs, a temporary cut in hours or a one-time bonus may not qualify, while a permanent layoff or a lasting new salary usually does. Pay that swings from year to year is covered in overtime, bonuses and commissions. The guide on how to modify child support has a table of every state’s threshold, and the modification calculator applies your state’s test to your own numbers.

A pay cut and a raise, worked through

Take an order in Florida for two children, set when the paying parent earned $65,000 a year and the receiving parent earned $40,000. The guideline amount was $1,148 a month. If the paying parent moves to a job paying $60,000, the guideline amount becomes $1,088. That drop is larger than Florida’s dollar figure but well short of its percentage, so the presumption doesn’t apply. If the new job pays $45,000 instead, the guideline amount is $894, which meets both parts of the test.

Now a raise. In Michigan, an order for two children set when the paying parent earned $50,000 and the receiving parent earned $40,000 would be $1,003 a month on the guidelines. After a raise to $65,000, the guideline amount is $1,236. That difference clears the Friend of the Court’s test of at least 10% and at least $50 a month, so a review could lead to a higher order.

These are estimates of the starting figure. The court or agency decides which incomes to use and can deviate from the guidelines. The child support calculator gives the guideline amount on any incomes, and the modification calculator compares it with your current order.

When the other parent’s income changes

Income changes on the other side of the case matter too, but how much depends on the state’s model. In income shares states, 41 of those this site covers, the support obligation is split in proportion to both parents’ incomes, so a raise for the receiving parent lowers the paying parent’s share. In Colorado, with the paying parent at $50,000 and two children, a raise for the receiving parent from $40,000 to $60,000 moves the guideline amount from $877 to $770 a month, enough to meet Colorado’s 10% test. In Texas, the guideline amount is a percentage of the paying parent’s net resources alone, so the same raise leaves it where it was: $882 before and $882 after.

A receiving parent who believes the paying parent now earns much more can ask for a review as well. They may not know the exact figure, and they don’t need to: a modification case requires both parents to disclose their finances, and agencies can compare orders with wage records. Bear in mind that a review looks at both incomes, so the result can move in either direction.

Voluntary and involuntary drops

Why income fell matters as much as how far. A layoff, a business closing or a health problem that stops someone working is generally treated as involuntary, and the guidelines are applied to the income the parent actually has, including unemployment or disability benefits. The guide to unemployed or disabled parents covers how those benefits count.

If a court finds that a parent chose to earn less without good reason, by quitting, turning down work or cutting hours, it can base support on what the parent could earn instead. That is called imputing income. Federal rules require states that impute income to consider the parent’s actual circumstances, such as work history, skills, health and the local job market, and they bar treating incarceration as voluntary unemployment; see child support when a parent is incarcerated. Changes such as going back to school or starting a business fall in between, and courts decide them case by case. Keeping a record of job applications, interviews and offers is the best evidence that a drop wasn’t a choice.

Agency reviews on a regular cycle

If the state child support agency enforces the order, it offers a route that doesn’t depend on proving a change at all. Under 45 CFR 303.8, the agency must review an order on either parent’s request within 36 months after it was set or last reviewed, or on a shorter cycle the state chooses, and adjust it to the guidelines without requiring proof of changed circumstances. A request outside that cycle needs a substantial change in circumstances. Agencies must remind both parents of the right to ask for a review at least once every 3 years, and they have 180 calendar days from a request, or from locating the other parent if that comes later, to finish it.

Agency reviews are free or low-cost but can take months, which is another reason to ask early. A court motion is the other route and may suit cases where the facts are disputed. The federal Office of Child Support Enforcement (OCSE) keeps a directory of state and tribal child support agencies, and each state page on this site links its agency and official calculator.

What to gather before you ask

Whichever side of the case you are on, a request goes faster with the paperwork ready:

• The current order and payment history, including any statement of arrears from the agency.
• Proof of current income: recent pay stubs, the last tax returns, a new offer letter or employment contract.
• Proof of the change: a layoff or termination notice, a letter reducing hours, unemployment or disability benefit statements, or medical records.
• Job search records if you are out of work: applications, interviews and any offers.
• Costs that feed the worksheet, such as the child’s health insurance premiums and childcare bills.
• Anything showing the other parent’s new job or raise, if that is the reason for the request. Formal financial disclosure will follow.

Then run the numbers, file or apply, and keep paying the current order until a new one is in place. If the facts are disputed or a large amount is at stake, a lawyer or legal aid office in your state can help.