By Kevin Luu, Co-Founder and Chief Learning Officer. Reviewed on 2026-09-30.
A wealth management app is useful for one job: showing every account in one place, including your 401(k), brokerage, company stock plan, 529s and cash, with a current net worth. For a high-income W-2 family with RSUs, it is a dashboard, not a plan. It typically will not tell you that your RSU withholding is short, that your broker reported the wrong cost basis, or that one employer now makes up half of your wealth.
This guide covers what to look for in an app if your household earns $750k or more in California or Washington, where these tools fall short at that income, and how to decide whether an app, a spreadsheet or a person should own each job.
What a wealth management app does well for a busy two-income family
Most apps in this category do three things. They link to your accounts through read-only connections, they total your balances into a net worth figure, and they show allocation and fees across everything. For a family with a dozen accounts spread across two employers, that alone saves real time.
The features that matter most at your income level:
- Equity plan linking. The app should pull vested shares from your stock plan administrator, not just your brokerage. Check whether it shows unvested RSUs at all. Many do not, which understates your exposure to your employer.
- Held-away account coverage. 401(k) plans, HSAs, 529s and custodial accounts for the kids are often the accounts that fail to link. See our explainer on held-away assets for why this matters.
- Look-through allocation. A target-date fund in one spouse’s 401(k) and an index fund in the other’s both hold the same large companies. The app should show combined exposure, not just account labels.
- Read-only access and two-factor login. The app should never be able to move money. If it asks for trading or transfer permission, that is a different product.
- Shared household view. Both spouses should see the same numbers without sharing one login.
Where apps fall short when RSUs are a large part of pay
An app reports balances. The expensive mistakes for this reader happen in the gaps between balances, payroll and the tax return. Three come up again and again.
1. RSU withholding is set at 22%, but your tax rate is higher
When RSUs vest, employers usually withhold federal tax at the optional 22% flat rate for supplemental wages, rising to a mandatory 37% only on supplemental wages above $1,000,000 in the calendar year (IRS Publication 15, 2026). For a household in the 35% or 37% bracket, 22% is too low. An app shows the shares landing in your account. It does not show the tax bill that came with them.
2. Your broker’s cost basis may not match what you already paid tax on
RSU and ESPP income is taxed as wages on your W-2. When you later sell the shares, your basis should include that income. The basis on Form 1099-B can be missing or too low for shares from equity compensation, and the IRS instructions explain how to correct it on Form 8949 (Instructions for Form 8949; IRS Publication 525). Apps usually import whatever basis the broker sends, so the unrealized gain you see in the app can be overstated.
3. Concentration hides across accounts
Vested shares in the plan account, ESPP shares at the broker, unvested RSUs off the app entirely, and the paycheck itself all depend on one company. An app’s pie chart may show “company stock: 25%” while your real exposure, counting unvested grants and your job, is much higher.
Worked example: a $900k Bay Area household
Assumptions (illustrative, 2026 federal figures): married filing jointly, two W-2 earners, $550k combined salary and bonus, $350k of RSU vests, both spouses defer the full $24,500 into their 401(k)s, standard deduction of $32,200 (Rev. Proc. 2025-32; Notice 2025-67).
| Line | Amount |
|---|---|
| Gross wages, including RSUs | $900,000 |
| Less 401(k) deferrals (2 x $24,500) | $49,000 |
| Less standard deduction (2026) | $32,200 |
| Federal taxable income | $818,800 |
| Federal tax on the RSU slice (taxable income from $468,800 to $818,800, at 32%, 35% and 37%) | about $122,190 |
| Federal tax withheld on RSUs at 22% | $77,000 |
| Federal shortfall on RSUs alone | about $45,190 |
The app shows $350,000 of new shares (less the shares sold to cover withholding) and a higher net worth. It does not show a federal bill of roughly $45,000 due in April, before the 0.9% Additional Medicare Tax on wages over $250,000 for joint filers in 2026 and before state tax.
In California, the RSU income is also taxed as ordinary income at rates that reach 13.3% at the top (2025 schedule, the latest published by the FTB), and SDI of 1.3% applies to all wages with no cap in 2026 (EDD). California has no lower rate for capital gains, so a basis error on a later sale is taxed at full state rates as well.
In Washington, there is no state income tax on wages in 2026, so RSU vests carry no state income tax. Long-term gains when you later sell the shares can count toward Washington’s 7% capital gains tax above the standard deduction ($278,000 for 2025, the latest published) (WA DOR). Washington has also enacted a 9.9% income tax on AGI over $1,000,000 starting in 2028 (WA DOR), which matters for families whose income is near or above that level.
Now add the basis problem. Say the family sells 1,000 shares that vested at $180 and sold at $190. The real gain is $10,000. If the 1099-B shows a basis of zero and nobody adjusts it, the return reports a $190,000 gain, and $180,000 of income already taxed on the W-2 is taxed again. The app would have shown the same wrong number all year.
App, spreadsheet or person: who should own each job
| Job | App | Spreadsheet | Adviser or CPA |
|---|---|---|---|
| Net worth across all accounts | Good, if accounts link | Works, but manual | Not needed |
| Spending and cash flow | Good | Works | Not needed |
| Unvested RSU schedule and future tax | Weak or missing | Good if kept current | Good |
| Withholding gap and estimated payments | No | Possible | Good |
| Correct cost basis on equity sales | No | Possible | Good |
| ESPP $25,000 annual purchase limit (grant-date value) | No | Possible | Good |
| Concentration and a written sell plan | Shows the number only | Shows the number only | Good |
| Why you made each decision, for the kids | No | Partly | Good, if documented |
The ESPP limit comes from Section 423: the right to buy cannot accrue at more than $25,000 of stock per calendar year, valued at grant-date fair market value (26 U.S.C. 423).
For many delegating families, the useful setup is simple: an app for the live dashboard, and one person who owns the tax and concentration decisions the app cannot see. If you are weighing that second piece, our guides on what a wealth manager costs and how to vet a financial advisor cover the questions to ask.
Five questions to ask before you link your accounts
- Does it connect to both employers’ stock plan administrators and both 401(k) plans?
- Does it show unvested RSUs, or can you add them manually?
- Can you edit cost basis on individual lots?
- Is access read-only, and who else can see your data?
- Can both spouses log in separately to the same household view?
If the answer to the first two is no, the app will understate your single biggest risk.
Common mistakes high earners make with these tools
- Treating net worth as spendable. Vested RSUs carry a tax bill that may not be paid yet.
- Leaving the kids’ accounts off. 529s and UTMA accounts often fail to link, so the app tells an incomplete story about education funding.
- Reading the gain column at tax time. If basis is wrong in the app, it is likely wrong on the 1099-B too. Check it before you sell.
- Assuming the app is advice. Some apps are run by companies that also sell advisory services. Know which one you are using and what it is paid for.
What an app cannot record for your children
An app holds today’s balances. It does not hold why you kept some company stock and sold the rest, why you chose a 529 over a UTMA, or how you decided what was enough. Those reasons are what your kids will need when the accounts become theirs.
As Kevin Luu puts it: “Your kids don’t need to inherit your portfolio. They need to inherit your decision-making process.”
A short written note each time you make a major money decision, kept next to the numbers, turns a dashboard into something your family can learn from. Our family governance work and the FamilyKnowledge® System are built around that habit.
Frequently asked questions
Is a wealth management app safe to link to my brokerage and 401(k)?
Most aggregation apps use read-only connections, meaning they can see balances and transactions but cannot move money. Use a unique password, turn on two-factor login, and check whether the app shares or sells data. If an app asks for permission to trade or transfer, treat it as a brokerage account, not a dashboard, and review it with the same care.
Can an app replace a financial adviser for a family earning $900k?
It can replace the work of gathering numbers. It typically cannot handle RSU withholding gaps, basis corrections, concentration limits or estate decisions, which is where the larger dollar amounts sit at this income. Many families use an app for visibility and a fee-only adviser for decisions. Our investment and risk management page explains how we split that work.
Should unvested RSUs count in our net worth?
Track them, but separately. Unvested shares are not yours yet, they are typically forfeited if you leave the job, and they will be taxed as wages when they vest. Showing them on their own line, after an estimate of tax, gives a more honest picture of how much of your future depends on one employer.
Your next step
Pull your last vest confirmation and your 2026 pay stub, and compare the federal tax withheld on RSUs with your actual bracket. If the gap is large, the usual fixes are estimated payments or a W-4 change before year-end. If you would like a second set of eyes on withholding, basis and concentration together, the Tax & Wealth Assessment is where we start.
This is general education, and the right move depends on your family’s full picture.
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.
Connect on LinkedIn → · About KevinThis is part of how we approach Investment & Risk Management for high-income W-2 families at Bright Advisers.
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