Family Financial Planning: 10 Steps for High-Income Parents in California and Washington

By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.

Family financial planning is the work of turning one household’s income, benefits, taxes, insurance, estate documents and goals into a single written plan that both parents understand and can act on. For a two-income family earning $750,000 to $3 million in California or Washington, the ten steps below cover what matters most: cash flow that includes RSU vests, workplace benefits, the RSU tax gap, protection, guardians and trusts, education funding, year-round tax planning, an investment policy, a review calendar, and a record of how you make decisions.

The order matters. Families at this income level rarely fail because they picked the wrong fund. They get into trouble because nobody owns the whole picture: equity vests pile up in one stock, the will names a guardian who moved away, and the kids grow up seeing the results of money decisions without ever hearing the reasoning.

Why a plan matters more at $1 million of W-2 income

High W-2 income brings problems a smaller household never sees. Most of the tax breaks designed for families phase out. Withholding on equity pay is often too low. A large share of net worth can sit in one employer’s stock. And both parents are usually working 50 to 70 hours a week, so decisions get made in a hurry or not at all. A written plan is how a busy household delegates without losing control.

Three examples of phase-outs, all for 2026: the Child Tax Credit of $2,200 per child starts shrinking at $400,000 of modified adjusted gross income for joint filers and is gone for a two-child family at $488,000 (IRS). The new $40,400 cap on the state and local tax deduction falls back to $10,000 once joint MAGI passes about $606,333 (P.L. 119-21). Direct Roth IRA contributions phase out between $242,000 and $252,000 of joint MAGI (IRS Notice 2025-67). The plan has to be built around the tools that still work at your income.

A worked example: a $1.05 million household in San Mateo

We will use one illustrative family throughout. Priya is a scientist at a Bay Area biotech company: $320,000 salary plus $280,000 of RSUs vesting in 2026. Dan is a hospital-employed physician earning $450,000 in W-2 salary. Household income is $1,050,000. Their children are 3 and 7. They file jointly and live in California. All figures are assumptions for illustration, not a recommendation for any real family.

The 10 steps of family financial planning

1. Build a one-page cash-flow picture that includes equity pay

Start with what actually lands in the bank each month after taxes, 401(k) deferrals and benefits, then list fixed costs (housing, childcare, school, insurance) and flexible spending. Treat RSU vests as a separate line, not part of monthly income. If the family’s lifestyle only works when the stock is up, that is the first finding of the plan. For Priya and Dan, the goal is that salaries alone cover all fixed costs and regular saving, and RSU proceeds fund long-term goals.

2. Size the emergency reserve to your fixed costs, not a rule of thumb

“Three to six months of expenses” is a starting point, not an answer. Size the reserve on fixed costs and on how exposed your income is. Two W-2 incomes from different employers are more stable than two incomes from the same company. In the example, fixed costs are about $30,000 a month (an assumption), so six months is $180,000 held in cash or Treasury bills. Unvested RSUs do not count, because they disappear if Priya leaves her job.

3. Use every workplace and tax-advantaged account that still works at your income

For 2026 each spouse can defer $24,500 into a 401(k) or 403(b) (Notice 2025-67). If Priya’s plan allows after-tax contributions with in-plan Roth conversion, the mega backdoor Roth adds room up to the $72,000 total annual additions limit. With an assumed $12,000 employer match, her extra room is $72,000 minus $24,500 minus $12,000, or $35,500. Each spouse can also make a $7,500 backdoor Roth IRA contribution for 2026, which matters because their income is far above the direct Roth limit (the pro-rata rule can make part of the conversion taxable if either spouse holds pre-tax IRA money).

Two benefits parents often skip: a dependent care FSA, now $7,500 per household for 2026 if the employer plan has adopted the higher limit (P.L. 119-21), for care of children under 13 (IRS Publication 503); and an HSA, $8,750 for family coverage in 2026 if the family is on a qualifying high-deductible plan (Rev. Proc. 2025-19). At a 37% federal rate, the $7,500 dependent care exclusion lowers federal income tax by about $2,775. For more on these choices, see our page on retirement and employee benefits.

4. Close the RSU withholding gap and set a concentration limit

RSUs are taxed as wages when they vest. Many employers withhold federal tax on vests at the 22% flat supplemental rate, and the mandatory 37% rate only applies to supplemental wages over $1,000,000 in the year (IRS Publication 15). Priya’s $280,000 of vests withheld at 22% can leave up to about $42,000 of federal tax unpaid: $280,000 x 15% if all of it is taxed at the couple’s 37% rate, somewhat less for any part that falls in the 35% bracket. That gap typically shows up in April unless the family makes estimated payments or raises withholding elsewhere.

The second decision is how much employer stock to hold. Many families pick a simple ceiling, for example no more than 10% to 15% of net worth in one company, and sell vested shares on a schedule. In California, gains on those shares are taxed as ordinary income with no lower capital gains rate (FTB), so selling soon after vest often costs little extra tax. Our tax management page covers the planning side.

5. Protect the income the plan depends on

A $1 million household that loses one income for good loses most of its plan. Term life insurance on each parent should cover the spending gap until the youngest child is independent, plus any goals you want funded regardless. As an illustration, if the family would need an extra $250,000 a year for 15 years without Dan’s income, that is about $3.75 million before investment returns and existing assets. Long-term disability coverage matters as much, and group policies at work often cap the monthly benefit well below a physician’s or senior scientist’s pay, so check the cap and whether benefits are taxable.

6. Name guardians and set up trusts for minor children

A will is where parents nominate a guardian for children under 18. Many California families also use a revocable living trust so assets pass without probate and a trustee manages money for the kids until an age you choose. Without a trust, assets left to a minor may go through a custodian under the Uniform Transfers to Minors Act, and the child gets full control young: in California at 18 by default, and no later than 25 when set up by will or trust (Cal. Probate Code 3920.5). Check beneficiary designations on 401(k)s, IRAs and life policies too, since they override the will.

The federal estate and gift tax exclusion is $15,000,000 per person for 2026 (IRS). Washington families face a lower bar: Washington’s own estate tax exclusion is $3,000,000 for deaths from July 1 to December 31, 2026 (WA DOR), which a Seattle household with a home, retirement accounts and life insurance can pass. See estate planning.

7. Fund education with the right account, and the right donors

A 529 plan grows tax-deferred, and withdrawals for qualified education costs are tax-free. California allows no state deduction for 529 contributions, so for Californians the case rests on tax-free growth (federal and California) and estate planning. For 2026 each donor can give $19,000 per child without using lifetime exclusion, or elect to front-load five years at once, up to $95,000 per child per donor (Form 709 instructions). Priya and Dan together could put $190,000 into each child’s 529 in one year, and grandparents can do the same, which gives the money the longest time to compound. The election is made on Form 709, and it uses up that donor’s annual exclusion for that child for the five years.

Avoid putting large sums in a custodial account for tax reasons alone. For 2026, a child’s unearned income above $2,700 is taxed at the parents’ rate under the kiddie tax (Rev. Proc. 2025-32), and the money becomes the child’s outright: for a lifetime gift, at 18 in California (up to 21 if the gift says so) and at 21 in Washington (up to 25 if set when the custodian is named) (RCW 11.114.200).

8. Plan taxes year-round, with the state in mind

For this family the big levers are not deductions, which mostly phase out, but timing and account choice: pre-tax deferrals, the mega backdoor Roth, where investments sit, when to sell employer stock, and whether to bunch charitable gifts into a donor-advised fund in a high-income year. Remember the payroll taxes that never stop: the 0.9% Additional Medicare Tax above $250,000 of joint wages and, in California, 1.3% SDI on every dollar of wages for 2026 (EDD).

Washington works differently. There is no wage income tax in 2026, but long-term capital gains above the annual standard deduction ($278,000 for 2025) are taxed at 7%, and 9.9% on taxable gains above $1,000,000 (WA DOR). Washington has also passed a 9.9% income tax for individuals and joint filers with AGI over $1,000,000, starting January 1, 2028, with first returns due in April 2029 (WA DOR). DOR guidance on the details is still pending, but a Seattle household with $1.2 million of AGI has reason to start planning for it now.

9. Write an investment policy for the whole household

A short investment policy statement answers four questions: what each pool of money is for, when you will need it, how much risk it can take, and when you rebalance. It treats 401(k)s, Roth accounts, the taxable brokerage account, 529s and employer stock as one portfolio, so bonds can sit where they are taxed least and stock where growth is sheltered. It also writes down the sell rules for employer shares from step 4, so nobody has to make that call in a bad market. Read more under investment and risk management.

10. Document how you decide, and bring the kids in

This is the step most plans leave out. When you choose a school, decline a job offer, or sell stock to buy a house, your children see the outcome but not the reasoning. A one-page Decision Memo for each big choice (what we decided, why, what we gave up) turns the plan into something the family can learn from. As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.”

At ages 3 and 7, that can be as simple as a monthly 20-minute money conversation and a shared folder of decisions in plain language. The FamilyKnowledge® Library is the structured version of that folder. Our Age Five Wealth Education page explains how families start, and 9 steps to build generational wealth covers the longer horizon.

Your annual family financial planning calendar

Common mistakes we see in high-income families

• Spending that depends on RSU vests, so a stock drop becomes a cash-flow problem.
• Ignoring the gap between 22% withholding and a 37% federal rate until April.
• A will written before the second child, or never written at all.
• Leaving the mega backdoor Roth and dependent care FSA unused because nobody checked the plan documents.
• Two parents with two different mental plans and no shared document.

Frequently asked questions

Are there tools to align family members on financial priorities?

The most useful tool is a shared written plan both parents can read in ten minutes: goals ranked, the monthly saving target, the stock sell rule and the guardian choice. Add a recurring money meeting and a short memo for each big decision. Budgeting apps help track spending, but they do not settle priorities. Agreement comes from writing the priorities down together and reviewing them on a schedule.

Can family financial planning include estate strategy?

It should. For parents of young children the estate layer is guardianship, a trust that controls when and how kids receive money, correct beneficiary designations, and enough life insurance. In Washington it also means watching the state estate tax exclusion of $3,000,000 for deaths in the second half of 2026. A good plan connects these documents to the cash-flow and investment decisions rather than treating them as a separate project.

When should a family hire a financial planner?

Typically when equity pay, two demanding careers and young children make the steps above hard to keep up with on nights and weekends. Look for a fee-only fiduciary who covers tax, benefits, investments and estate coordination together. Our guide on choosing the right family advisor lists the questions to ask.

Next step

Pick the one step above your family has not done, most often the RSU withholding check or the guardian choice, and finish it this month. If you want the full picture in one place, the Tax & Wealth Assessment from Bright Advisers walks through all ten steps with your actual numbers.

This article is general education, not individual tax, legal or investment advice. The right move depends on your family’s full picture.

Written by

Kevin Luu

Co-Founder and Chief Learning Officer, Bright Advisers

Kevin has advised high-income W-2 tech and biotech families since 2015, and leads the education-first Age Five Family Office from Brea, California.

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