What Counts as Income for WA Child Support (2026 Guide)

Disclaimer: This guide explains Washington State's 2026 income definition for child support purposes. It is not legal advice. Consult a licensed WA family law attorney for advice specific to your case.

One of the most contested aspects of any child support case in Washington is what actually counts as income. The definition under RCW 26.19.071 is deliberately broad. The legislature did not want parents to be able to structure their finances to avoid supporting their children. Understanding exactly what is included, what is excluded, and what the court does when it suspects income is being hidden is essential knowledge for any parent going through this process.

What Washington Includes in Gross Income

Washington's definition of gross income for child support purposes is expansive. Under RCW 26.19.071, it includes virtually everything a parent receives:

• Wages, salaries, commissions, and tips, the full gross amount before any deductions
• Overtime pay. Averaged over 12 months rather than based on a single high-earning period
• Annual bonuses, averaged monthly over the prior 12-month period regardless of whether they are recurring
• Self-employment income, gross revenue minus legitimate business expenses under the RCW 26.19 standard, not the IRS standard
• Rental income. Net of maintenance and mortgage costs directly associated with the property
• Unemployment compensation. Counts as gross income and can be garnished by DSHS
• Disability and workers' compensation benefits
• Social Security benefits — including disability payments received on behalf of the children, which are credited against the support obligation
• Pension and retirement income, distributions received during the calculation period
• Trust fund distributions, amounts actually distributed, not just trust value
• Restricted Stock Units (RSUs). Counted as income in the year they vest, reported on W-2
• Investment income, dividends, interest, and capital gains reported on tax returns

What Washington Excludes from Gross Income

The following are specifically excluded under RCW 26.19.071 and do not count toward gross income for child support purposes:

• Income of a new spouse or domestic partner. The other parent's new relationship does not affect your income calculation
• Public assistance benefits, TANF, food stamps, and similar means-tested programs
• Supplemental Security Income (SSI)
• Child support received for children from other relationships — not counted as your income

How Self-Employment Income Works

Self-employment income is the most frequently disputed category in Washington child support cases. Courts start with the business's gross revenue and then subtract what Washington considers legitimate business expenses — which is not the same as what the IRS allows on Schedule C.

Washington courts regularly add back deductions that reduce taxable income on paper but do not represent actual cash outflows, including:

• Depreciation on assets, not a real cash expense in the calculation period
• Home office deductions, unless the space is used exclusively for business
• Vehicle expenses that appear personal. Meals, entertainment, personal travel
• Excessive owner compensation structures used to minimize apparent income

If you are self-employed and facing a child support case, expect your Schedule C to be scrutinized carefully. Commissioners in counties like King County see this regularly and are experienced at identifying inflated business expense deductions.

Imputed Income, When Courts Assign Income You Did Not Earn

If the court finds that a parent is voluntarily underemployed, meaning they have chosen to work less than they are capable of, it can assign or "impute" income at the level the parent could reasonably earn. This is one of the most powerful tools courts have against parents who try to reduce their apparent income to lower their support obligation.

Courts consider factors including the parent's work history, education, professional licenses, and the local job market when determining what income to impute. At a minimum, courts typically impute income at Washington's current minimum wage for full-time work. If your documented history shows you were earning $5,000/month and you suddenly claim $800/month after a separation, expect significant scrutiny.

Legitimate reasons for reduced income (a documented medical condition, industry-wide layoffs, or an involuntary termination) are evaluated differently. The key is contemporaneous documentation proving the reduction was not voluntary.

How Courts Verify Income in Disputed Cases

When one parent disputes the other's income disclosure, courts have broad fact-finding authority. They can order production of bank statements, credit card records, business financials, brokerage accounts, real estate records, and any other financial documentation relevant to establishing actual income. Lifestyle evidence (vacations taken, vehicles driven, housing maintained) can also be introduced to challenge claimed income figures.

Does My New Partner's Income Affect My Child Support?

Generally no — a new spouse or domestic partner's income is not included in the core child support calculation in Washington State. However, if you have significantly reduced your own working hours because your new partner is supporting your household, the court may impute income to you at the level you would otherwise be earning. The indirect effect is real even if the direct inclusion is prohibited.

Related Articles

• WA Child Support Calculation: Full Step-by-Step Walkthrough
• 2026 WA State Guidelines: Complete Handbook
• How Washington Courts Decide Your Support Order

Bottom Line

Washington's income definition is deliberately broad and courts are experienced at identifying attempts to minimize apparent income. Accurate, complete disclosure is both legally required and practically the best strategy, undisclosed income discovered during a hearing damages credibility in ways that affect the entire proceeding. Enter your accurate income into our calculator to get your 2026 estimate, then review the full calculation with the Professional Worksheet.

For official state resources and documentation, please visit the Washington DSHS or the Washington Courts homepage.