At Northwest Family Law, we represent Mercer Island parents in child support matters.
Since 2014, our attorneys have handled cases involving RSUs, stock options, executive bonuses, business distributions, and deferred compensation across King County Superior Court, where equity earners often find that the standard child support worksheet does not fit their reality.
Washington uses an Income Shares Model under RCW 26.19, in which both parents’ combined net monthly income determines the obligation based on the state’s Economic Table. When part of that income arrives as vesting equity or variable bonuses, deciding what counts and how it is averaged becomes the central fight.
The initial order carries outsized weight. Modifying it later under RCW 26.19 is far harder than getting it right the first time. We work discreetly, knowing that in a small, connected community privacy matters, and our role is to make a financial picture clear and defensible before a King County judicial officer.
How Washington State Calculates Child Support for Mercer Island Families
Washington uses an Income Shares Model under RCW 26.19, meaning support is based on the combined monthly income of both parents. The calculation runs through the Washington State Child Support Schedule and mandatory worksheets, which determine each parent’s share, the base transfer payment, and any add-on expenses. According to the U.S.
Census Bureau’s American Community Survey 5-Year Estimates, King County’s median household income was $120,857, a figure that directly influences child support calculations under Washington’s income-based formula.
The starting point is gross monthly income for each parent. Mercer Island cases become contested when income includes restricted stock units, stock options, bonus income, business distributions, or deferred compensation. Whether unvested RSUs count, and how variable income is averaged, can shift the final number considerably.
Residential time from the parenting plan also affects the transfer amount. Add-on expenses like childcare, health insurance premiums, and extraordinary educational costs are allocated on top of the base. Courts may order a deviation from the standard schedule, but only with supporting evidence.
For Mercer Island families, these matters are heard in King County Superior Court. This is educational information, not legal advice for your specific situation.
Our Child Support Services in Mercer Island
- Establishing initial child support orders where RSUs, stock options, bonuses, and deferred compensation complicate the standard calculation
- Responding to support petitions filed by the other parent, including when they already have counsel
- Modifying existing support orders when a substantial change in circumstances, such as an income shift, no longer reflects reality
- Enforcing unpaid support through wage withholding and other legal remedies under Washington law
- Preparing and arguing deviation requests, upward or downward, from the Washington Child Support Schedule
- Negotiating support as part of broader divorce or parenting plan proceedings
- Representing unmarried parents in paternity-linked support actions
- Advising on how child support intersects with spousal maintenance and property division in your financial picture
- Coordinating with financial professionals to accurately characterize business distributions, K-1 income, and vested versus unvested equity
- Handling interstate support matters, including UIFSA registration and modification when a parent has relocated out of state
When and How Child Support Orders Can Be Modified in Washington
According to Washington State Legislature RCW 26.09.170, an order can be modified when at least 24 months have passed since the last order and the amount differs by 15 percent or more from current guidelines, or when there is a substantial change in circumstances.
A substantial change can take many forms. Common triggers include an income shift for either parent, job loss, a new residential schedule, added childcare costs, a child aging out, or a disability.
When compensation includes RSUs, bonus income, or business distributions, a change in vesting or earning capacity often supports revisiting an order set during a lower-income period.
Modifications come in two forms. If both parents agree, the change is entered as a stipulated order without a contested hearing. If they disagree, the matter proceeds through King County Superior Court, where a judicial officer applies the Washington Child Support Schedule to current figures.
Modifications generally apply from the petition date forward, not retroactively, so timing affects what you recover. A custody or parenting plan change frequently leads to a support recalculation as well.
Why Choose Northwest Family Law in Mercer Island
Fluency with equity compensation, not just salary
We regularly handle income analysis involving restricted stock units, stock options, executive bonuses, and deferred compensation, including how King County Superior Court treats vested and unvested equity in divorce and support proceedings.
12+ years of accumulated King County experience
Since 2014, our team has represented Greater Eastside families through contested support, modification, and enforcement matters, earning a 5-star rating across 126 reviews and recognition as a Marquis Who’s Who Honored Listee.
Communication that respects your schedule
We respond promptly and stay reachable outside standard business hours, including evenings and weekends, so consultations and updates never require leaving work mid-afternoon.
Discretion in a close-knit community
We treat every matter as confidential and understand that a separation on Mercer Island carries social stakes worth protecting.
Support tied to your full financial picture
We connect clients with financial planners and other professionals, treating child support as part of your broader financial reality, not an isolated calculation.
About Northwest Family Law
Northwest Family Law has practiced family law across King County and the Greater Eastside since 2014, with more than 12 years of courtroom experience in matters that turn on how income is defined and proven.
Our attorneys handle child support cases where compensation is not a simple W-2 figure, including RSUs, stock options, executive bonuses, business distributions, and deferred compensation under Washington’s child support guidelines.
When compensation is anything other than a salary, the outcome depends on who can present the numbers clearly to a King County Superior Court judicial officer and argue how they should be treated. We work within these local procedures regularly.
According to the Washington State Bar Association, Washington has over 40,000 active licensed lawyers as of 2023. Our 126 five-star reviews and 2025 Marquis Who’s Who recognition give you a record you can verify before you ever call.
Our Process for Mercer Island Families
1. Confidential Initial Consultation
We start by understanding your family’s financial and parenting situation privately, at a time that works for you, including evenings and weekends.
2. Review of Existing Orders and Documents
We examine any current support orders, decrees, or parenting plans already in place, including out-of-state orders that may require UIFSA registration or modification.
3. Income and Expense Analysis
We collect and analyze pay stubs, tax returns, and business financials, giving close attention to RSUs, stock options, deferred compensation, and business distributions that the standard calculation does not capture cleanly.
4. Washington Child Support Worksheets
We complete and review the Washington State Child Support Worksheets under RCW 26.19, then assess whether a deviation from the standard schedule is realistic and what evidence supports it.
5. Strategy Development
We map your options: a negotiated agreement or a contested motion. According to the Washington State Courts’ 2023 Annual Report, King County Superior Court processes tens of thousands of family law filings each year, so a deliberate strategy matters.
6. Filing and Representation
We file or respond to petitions in King County Superior Court and represent you at contested hearings when needed.
7. Post-Order Guidance and Ongoing Availability
After entry, we guide payment through the Washington State Support Registry and remain available for questions and future modifications.
Frequently Asked Questions About Child Support
How are RSUs, stock options, and annual bonuses factored into a Washington child support calculation?
Under RCW 26.19, income for child support includes bonuses, and courts frequently include income from vested equity compensation such as restricted stock units and exercised stock options. The harder questions involve unvested RSUs, timing of vesting, and how variable income should be averaged.
If the other parent’s attorney is arguing that unvested RSUs should count as income, is that argument likely to succeed in King County?
It depends on the facts, including the vesting schedule, historical vesting patterns, and whether the grants are compensation for past or future work. Washington courts have discretion here, and the outcome often turns on how persuasively each side presents the compensation structure.
How long does it take to establish a child support order in King County Superior Court?
An initial order tied to a divorce or parentage action usually moves on the timeline of that broader case, often several months, though a temporary support order can be entered much sooner.
Can two parents just agree to waive child support in Washington?
Not freely. Washington treats child support as a right belonging to the child, so a court reviews any agreement and can reject terms that fall below the child’s needs or the standard calculation without adequate justification.
How does a 50/50 or shared parenting arrangement affect the support amount?
Shared residential time can support a deviation from the standard obligation, but it does not automatically eliminate support. Washington courts weigh the actual time split alongside each parent’s income, so a high earner may still owe support even in a near-equal schedule.
Is self-employment or business distribution income treated differently in the Washington calculation?
Yes. For self-employment, K-1 income, and business distributions, courts examine actual income after legitimate business expenses, and they scrutinize deductions that look like personal spending.
Can a child support order be modified if my income drops or the existing order no longer reflects real earnings?
Yes. A substantial change in circumstances, such as job loss or a meaningful income shift on either side, can support a modification, and orders are also generally reviewable periodically.
What is the difference between the DSHS Division of Child Support and hiring a private attorney?
The Division of Child Support administers and enforces support through standardized administrative processes, which works well for straightforward cases. Private counsel builds a tailored strategy, handles contested income disputes, and appears in King County Superior Court.
At what age does child support end in Washington, and does it cover college expenses?
Support generally continues until the child turns 18 or finishes high school, whichever is later. Washington also allows postsecondary support, meaning a court can order contribution toward college costs, though this is discretionary and depends on the parents’ resources and the child’s plans.
What Clients Say About Northwest Family Law
“I was always kept informed of the progress of my case, sometimes even getting updates after work hours or on the weekend.” – Glenn M.
“Mitchell and Cydney are amazing, so thorough, responsive, helpful, informative and kind.” – Lindsay S.
“Mitch is an exceptional family law attorney, blending compassion with legal acumen to achieve the best outcomes for his clients.” – Daniel B.
“They got my case resolved before trial with a fantastic outcome, despite it being quite a hectic timeline!” — Anonymous
“They are professional, attentive, compassionate, and genuinely care about their clients.” — Aubrey C.
Local Resources in Mercer Island
- King County Superior Court
The trial court handling family law matters including paternity, custody, and financial orders. - Washington State Division of Child Support (DCS)
State agency that establishes, enforces, and modifies support orders on behalf of families. - King County Clerk’s Office
Maintains official court records and filings for cases heard in King County Superior Court. - Washington State Department of Social and Health Services (DSHS)
Administers public benefits and coordinates with state support enforcement programs. - King County Family Law Facilitator
Court-based office offering procedural guidance to self-represented parties in family cases. - Mercer Island Community & Event Center
City-run facility that hosts social services, community programs, and referral resources for residents. - King County Assessor’s Office
Maintains property and income-related records that may be used to document financial circumstances.
Talk to a Child Support Lawyer Serving Mercer Island
When your income includes RSUs, bonus income, business distributions, or deferred compensation, the standard child support worksheet rarely captures the full picture. Getting the initial order right matters, because modifying it later under RCW 26.19 is far harder than shaping it correctly the first time.
Northwest Family Law offers a confidential consultation to review your situation, explain how King County Superior Court is likely to treat your compensation, and outline a clear path forward.
With offices in Kirkland and Bellevue, we make ourselves available for consultations and handle every matter with the discretion a close-knit community requires.
Schedule a confidential consultation at a time that works for you. Call us to speak with an attorney who understands what is at stake.
