The Bay Area High Earner's Tax Situation Is Different. Here's Why.

When was the last time you actually added up every tax you pay?

Not just your federal rate. Not just your California withholding. All of it — federal income tax, state income tax, payroll taxes, the Net Investment Income Tax, and the Alternative Minimum Tax if it applies to you.

Most high earners in the Bay Area have never done that calculation. When they do, the number is almost always higher than they expected. And understanding why it's that high, and how all of these taxes interact with each other, is the foundation of every meaningful financial decision you'll make.

The problem with generic tax advice

Most tax advice is written for most people. Most people are not Bay Area tech employees earning $400,000, $500,000, or $700,000 a year with RSUs vesting on top of a base salary and a spouse who also works in tech.

When a personal finance article tells you to max your 401(k) to reduce your tax bill, it's correct, but it's incomplete. When it tells you capital gains rates are lower than ordinary income rates, it's correct, but it leaves out the surcharge that applies specifically to high earners. When it tells you ISOs have favorable tax treatment, it's correct, but it doesn't mention the parallel tax system that can turn that favorable treatment into a six-figure liability.

Generic tax advice is built around the median taxpayer. You are not the median taxpayer. The rules that apply to your situation are layered, interconnected, and in several cases specifically designed to target income levels like yours.

That's not a complaint. It's just the reality of the tax code at this income level, and understanding it clearly is the first step toward doing something about it.

Layer one: Federal income tax

The federal income tax is progressive, meaning different portions of your income are taxed at different rates. For a married couple filing jointly in 2026, the brackets move from 10 percent on the first roughly $25,000 of taxable income up through 12, 22, 24, 32, 35, and 37 percent on income above $768,700.

At $500,000 of combined household income, a not insignificant portion of your earnings sits in the 32 percent bracket. The top dollar of income is taxed at 32 percent federally before anything else is added.

Most people anchor on their marginal rate and stop there. That's just the beginning.

Layer two: California state income tax

California has one of the highest state income tax rates in the country. For most Bay Area tech households, the relevant rate is 9.3 percent, which applies to income above roughly $145,000 for married filers. On income above about $1 million, a 1 percent mental health services surcharge pushes the top rate to 13.3 percent, the highest state income tax rate in the United States.

California also does not conform to federal tax treatment in several important ways. The state does not recognize the preferential treatment of qualified dividends or long-term capital gains, which are taxed as ordinary income in California regardless of the federal treatment. California also has its own version of the AMT, though it's less frequently triggered than the federal version.

For a household earning $500,000 in the Bay Area, adding 9.3 percent California tax on top of 32 percent federal brings the combined marginal income tax rate to over 41 percent before payroll taxes are considered.

Layer three: Payroll taxes

Payroll taxes are easy to undercount because they come out of your paycheck automatically and don't show up prominently on your tax return. But they're real money.

Social Security tax applies at 6.2 percent on wages up to $184,500 per person in 2026. For a dual-income tech household where both earners exceed that threshold, that's almost $23,000 in Social Security taxes annually, split between two W-2s.

Medicare tax applies at 1.45 percent on all wages with no cap. And here's where it gets more expensive for high earners: the Additional Medicare Tax adds another 0.9 percent on combined household income above $250,000 for married filers. That threshold is not indexed for inflation and has not moved since it was introduced, meaning more households cross it every year.

California also has State Disability Insurance, which in 2026 applies at 1.1 percent on all wages with no cap.

Add it all up and payroll taxes add several percentage points to the effective tax burden on top of the income tax rates already discussed.

Layer four: The Net Investment Income Tax

The Net Investment Income Tax, or NIIT, is a 3.8 percent surcharge that applies to investment income for households above certain income thresholds. For married filers, it kicks in on net investment income when modified adjusted gross income exceeds $250,000.

Investment income subject to the NIIT includes interest, dividends, capital gains, rental income, and passive income from investments. It does not apply to wages or active business income.

For a Bay Area tech household with a meaningful investment portfolio, the NIIT adds 3.8 percent on top of federal and California rates on every dollar of investment income. A long-term capital gain that might seem to benefit from the preferential 15 or 20 percent federal rate ends up taxed at 18.8 or 23.8 percent federally before California's ordinary income rate is added on top.

This is one of the most commonly overlooked elements of the high earner tax picture, and it's one of the reasons that investment income at this level is more expensive than most people realize.

Layer five: The Alternative Minimum Tax

The AMT is a parallel tax system that runs alongside the regular income tax. You calculate your taxes under both systems and pay whichever is higher.

The AMT was originally designed to ensure that very high earners couldn't use deductions to eliminate their tax liability entirely. Over time, inflation pushed more households into AMT territory, and the 2017 tax law raised the exemption thresholds significantly, reducing the number of people affected. For most W-2 employees in the Bay Area today, the federal AMT is not a primary concern.

There is one significant exception: employees who exercise Incentive Stock Options. As discussed in a previous issue of Vested, the spread on ISO exercises counts as income for AMT purposes even though it doesn't count under the regular tax system. For startup employees with meaningful ISO grants and significant appreciation, exercising options can trigger a substantial AMT liability, sometimes six figures, on income that hasn't been received in cash.

If you have ISOs, the AMT is not an abstract concern. It's a real calculation that should happen before any exercise decision, not after.

What the full picture actually looks like

Put it all together for a typical Bay Area dual-tech household and here's what you're looking at on the marginal dollar of income:

Federal income tax: 32 to 35 percent

California income tax: 9.3 percent

Additional Medicare Tax: 0.9 percent

Net Investment Income Tax (on investment income): 3.8 percent

That's a combined marginal rate of 42 to 45 percent on ordinary income, and potentially higher on investment income once all the layers are accounted for. On a household earning $500,000, the all-in effective tax rate, meaning total taxes divided by gross income, runs close to 36 percent as we covered in the second issue of Vested.

That number isn't a reason to panic. It's a reason to plan.

Why this matters for every financial decision you make

Understanding your full tax picture changes how you think about almost every financial decision.

It changes how you think about RSUs. Knowing that your marginal rate on ordinary income is 42 percent or higher makes the withholding gap on RSU vests, where your company withholds at 22 percent, feel a lot more significant. It also reinforces why selling immediately after vest is usually the right default: you're not avoiding taxes by holding, you're just deferring the decision while maintaining concentration risk.

It changes how you think about retirement accounts. At a 42 percent marginal rate, every dollar contributed to a traditional 401(k) saves you 42 cents in taxes today. The Mega Backdoor Roth, which we'll cover in the next issue, becomes even more valuable when viewed through the lens of what you're actually paying on ordinary income.

It changes how you think about investment income. Knowing that capital gains and dividends are subject to both the preferential federal rate and the NIIT, and that California taxes them as ordinary income regardless, informs how you structure your investment accounts and which assets you hold where.

It changes how you think about ISO exercises. Knowing that the AMT exists and how it interacts with ISO exercises makes it clear why modeling the tax consequences before exercising is not optional. It's essential.

And it changes how you think about planning generally. At this income level, the difference between a thoughtful tax strategy and no tax strategy is not marginal. It compounds over time into a meaningful difference in wealth.

The bottom line

The Bay Area high earner's tax situation is different because the rules at this income level are different. Federal brackets, California rates, payroll taxes, the NIIT, and the AMT don't operate independently. They stack, they interact, and they add up to a combined burden that most generic financial advice doesn't account for.

The first step is simply understanding what you're dealing with. The next step is building a financial plan that accounts for it deliberately, starting with the decisions that have the biggest tax impact, which for most tech employees means equity compensation first.

If you've never mapped out your full tax picture with all of these layers accounted for, that's exactly the kind of exercise worth doing before year-end.