Washington Child Support Laws 2026

Washington Uses Net Income — Here's the Exact Calculation

RCW 26.19 establishes Washington's income-shares child support model. Both parents' net incomes are combined, the basic obligation is read from the schedule in RCW 26.19.020 (as implemented in the current DSHS worksheets), and each parent's share is allocated in proportion to their percentage of combined net.

What "net income" means in Washington. Net is not a casual take-home guess. DSHS worksheets start from gross income and subtract allowable deductions defined in the rules — commonly including federal income tax, FICA (Social Security and Medicare), mandatory union dues, and certain other statutory adjustments. Health insurance premiums for the children may appear as separate worksheet lines rather than inside "net," depending on allocation rules.

Why net matters for tech households. A Seattle engineer with $180,000 W-2 gross and heavy pre-tax deductions can look " poorer " on a net worksheet than a colleague with identical gross but no 401(k) deferral — but Washington's worksheet rules are more tied to actual tax and payroll concepts than Illinois's fully standardized table. Still, do not type random take-home numbers from your banking app without checking the DSHS definition.

Combined net drives everything. Add Parent A net and Parent B net → locate the basic child support obligation for your child count on the RCW 26.19.020 schedule (updated for HB 1014's extended range). Each parent owes their proportional share before residential credit and add-ons.

Add-ons after the base. Medical support, daycare, and other qualified expenses can shift the final transfer. Calculators that show only the basic split understate real orders.

Official tool first. DSHS publishes worksheets and the Washington State Child Support Schedule at [dshs.wa.gov/esa/division-child-support/tools-resources](https://www.dshs.wa.gov/esa/division-child-support/tools-resources). Use those for filing; use TheLegalCalc for scenario planning.

The 2026 Table Expansion: From $12,000 to $50,000 Combined Income

Before House Bill 1014, Washington's basic child support obligation table in RCW 26.19.020 effectively capped meaningful schedule lookups at $12,000 in combined monthly net income. For two parents whose combined net exceeded that figure — common in King County dual-income households — courts applied discretion above the cap. Two similarly situated families could leave the same courthouse with different numbers.

HB 1014 extended the table to $50,000 per month in combined net income. Practically, that means many high-earning households now receive a presumptive guideline amount derived from the schedule rather than an almost purely discretionary analysis.

Who benefits from the change. Dual-income professionals in Seattle, Bellevue, Redmond, Kirkland, and Tacoma who previously exceeded the $12,000 combined net ceiling. Parents negotiating settlements now have a schedule anchor at combined nets of $15,000, $20,000, or even $40,000 where previously lawyers argued from first principles.

What did not change. Washington still uses income shares, net income definitions, residential credit mechanics, and the self-support reserve — HB 1014 expanded the table; it did not replace the statutory framework.

Existing orders. If your order was calculated when the old cap applied, the expanded table may produce a different guideline amount today with the same incomes. That difference interacts with modification rules in RCW 26.09.170 — especially after 24 months or when combined net has shifted materially.

Verify your row. Download the current DSHS schedule PDF after HB 1014. Do not use pre-2026 blog tables for combined income above $12,000.

The Self-Support Reserve: Why Low-Income Parents Pay Less in 2026

Washington protects obligors from orders that leave them below a statutory self-support reserve. RCW 26.19.065 and DSHS worksheet instructions implement that policy alongside a minimum support floor.

2026 federal poverty level context. For 2026 planning conversations, the federal poverty level for a one-person household is $15,960 per year — $1,330 per month.

Updated self-support reserve under HB 1014. Washington increased the reserve multiplier to 180% of the one-person FPL: 180% × $1,330/month ≈ $2,394/month self-support reserve in 2026.

Compare to the old rule. At 125% of FPL, the reserve was about 125% × $1,330 ≈ $1,663/month. The 2026 reserve is materially higher — low-income obligors retain more net income before maximum support is extracted.

Minimum support per child. RCW 26.19.065(2) establishes a $50-per-child monthly minimum in applicable cases. Even when proportional math would suggest a lower transfer, the minimum can apply depending on worksheet results and income levels.

How it plays out. A parent with very low net income may pay reduced support or hit the minimum rather than their full proportional share. The worksheet — not a headline percentage from a blog — controls the outcome.

Do not confuse reserve with exemption from support. The reserve limits how much can be taken; it does not eliminate the duty to support children when income exists above the protected floor.

Step-by-Step Example: $8,000 and $5,000 Monthly Net Income

This example uses net inputs already computed under DSHS rules — not gross wages. Illustrative only; verify on the official worksheet.

Inputs. - Parent A net: $8,000/month. - Parent B net: $5,000/month. - Two children. - Parent B is the primary residential parent; Parent A has a standard every-other-weekend schedule (below thresholds for maximum residential credit in this baseline).

Step 1 — Combined net. $8,000 + $5,000 = $13,000/month combined net.

Step 2 — HB 1014 table lookup. Under the post-HB 1014 schedule (RCW 26.19.020), $13,000 combined net falls inside the expanded table — previously this income level sat above the old $12,000 cap. For two children, suppose the basic child support obligation from the schedule neighborhood is approximately $2,050/month total (confirm exact row on the current DSHS PDF).

Step 3 — Proportional shares. Parent A share of combined net: $8,000 ÷ $13,000 ≈ 61.5%. Parent B share: ≈ 38.5%. Parent A's proportional share of BSO: 0.615 × $2,050 ≈ $1,261/month before residential credit and add-ons.

Step 4 — Residential credit (if applicable). If Parent A's overnight count qualifies for residential credit under Washington rules, the transfer may drop below $1,261. Residential credit is not automatic for minimal visitation patterns.

Step 5 — Compare to old cap world. Before HB 1014, the same $13,000 combined net exceeded the $12,000 table ceiling. A judge had wider discretion. Now the schedule supplies a presumptive $2,050 BSO anchor — changing both new cases and modification arguments.

Run your numbers. Plug the same inputs into [DSHS tools](https://www.dshs.wa.gov/esa/division-child-support/tools-resources) and TheLegalCalc's [Washington calculator](/child-support-calculator/washington).

Modifying an Existing Order: The 24-Month Rule Under RCW 26.09.170

RCW 26.09.170 governs modification of child support orders in Washington. Two concepts matter for 2026 planning: substantial change thresholds and the 24-month review window.

Substantial change — 25% or $50. When a recalculated guideline amount differs from the existing order by at least 25% and at least $50 per month (whichever standard the statute and case law require you to meet in your procedural posture), that can support modification. Always verify current statutory language and local court rules before filing.

24-month rule. After 24 months since entry of the order (or last modification), a parent may request adjustment without proving a substantial change in circumstances if: - either parent's income has changed enough to alter the worksheet result, or - the economic table (schedule) has changed since the order was entered.

HB 1014's table expansion is exactly a schedule change. Orders calculated when the combined net was above $12,000 and discretion ruled may now produce different presumptive amounts on the $50,000 table — opening modification conversations for eligible parents who satisfy timing and procedural requirements.

What filing requires. Updated financial declaration, income documentation, the current DSHS worksheet, and service on the other parent under RCW 26.09.170 procedures. IV-D cases through DSHS may have different administrative paths than private orders entered in superior court.

Retroactivity caution. Modifications generally apply from service or filing forward — not from when you first noticed the table changed. Delay costs money.

Use planning tools. TheLegalCalc's [modification calculator](/child-support-modification-calculator) includes Washington's 25% / $50 planning screen alongside other states — a triage step, not a filed motion.

Why the Table Update May Let You Modify Your Existing Order

HB 1014 did not just affect new divorces — it changed the mathematical landscape for existing orders tied to the old $12,000 combined net ceiling.

Scenario. You divorced in 2022 when combined net was $14,000/month. The court had broad discretion above $12,000. Your order reflects negotiation in that discretionary zone. In 2026, the same combined net maps to a specific schedule BSO under the expanded table — possibly higher or lower than your current payment depending on child count, residential credit, and add-ons.

Schedule change as a modification hook. RCW 26.09.170 allows petitions after 24 months when the economic table changes. HB 1014 is a textbook table change. If you also had income shifts (job change, RSU vesting, layoff, remarriage effects on household income reporting), the worksheet delta may exceed 25% or $50 — strengthening the case.

What to gather before calling a lawyer. - Copy of the current order and worksheet used at entry. - Last three years of tax returns and recent pay stubs for both parents. - Current DSHS worksheet run with today's income on the post-HB 1014 table. - Calendar of residential time if credit is disputed.

Cost-benefit reality. Modification requires filing fees, service, and attorney time. If the worksheet delta is $40/month, walk away. If the delta is $400/month for eight years until emancipation, investigate.

DSHS vs private counsel. If your case is IV-D, contact your caseworker about administrative review options. If your order is private, superior court family law departments handle most modifications.

Residential Credit: The Exception, Not the Rule in Washington

Washington's residential credit adjusts support when the noncustodial or non-primary parent spends significant time with the child — but it is not a automatic "50/50 means zero support" rule.

Policy idea. When a parent provides housing and day-to-day expenses during extended residential time, transferring the full proportional share to the other household double-counts the same costs.

How credit differs from Illinois's 146-night shared parenting. Washington uses its own overnight thresholds and worksheet lines under RCW 26.19 and DSHS instructions. Do not import another state's overnight math.

Minimum still applies. RCW 26.19.065(2)'s $50-per-child monthly minimum can limit how low support falls even with credit.

Evidence. Judges expect parenting plans, school records, and credible overnight counts — not verbal claims of "basically 50/50."

Interaction with HB 1014. Higher combined nets on the expanded table can increase the pre-credit proportional share, making residential credit battles more expensive in absolute dollars even when percentages stay constant.

Official DSHS Tools and TheLegalCalc Planning Calculator

For court-aligned output, use Washington State DSHS child support resources at [dshs.wa.gov/esa/division-child-support/tools-resources](https://www.dshs.wa.gov/esa/division-child-support/tools-resources). Download the current RCW 26.19.020 schedule reflecting HB 1014's $50,000 combined net ceiling before you mediate or file.

TheLegalCalc's [Washington child support calculator](/child-support-calculator/washington) helps you stress-test incomes, child counts, and overnight assumptions quickly. It is a planning estimate under RCW 26.19 — not a superior court order and not a substitute for the DSHS worksheet when income is disputed.

Suggested workflow for 2026. 1. Confirm whether your existing order predates HB 1014's table expansion. 2. Run current income through the DSHS worksheet and note the BSO at your combined net — especially if you previously exceeded $12,000 combined. 3. Compare with TheLegalCalc and debug any input differences (net definition, overnights, add-ons). 4. If the delta exceeds RCW 26.09.170's planning thresholds and 24-month timing works, consult Washington family law counsel about modification. 5. For new cases, bring both outputs to mediation to anchor realistic ranges.

Escalate to an attorney when RSUs, self-employment, interstate custody, or domestic violence appear — calculators cannot resolve those dimensions.