5 Year-End Tax Moves Every Bay Area Professional Should Make

The final weeks of the calendar year represent a narrow but powerful window for tax planning. Once December 31 passes, most of the levers you can pull to reduce your current-year tax liability disappear entirely. For Bay Area professionals earning high incomes, often with a mix of salary, equity compensation, and investment gains, a proactive year-end review can save thousands or even tens of thousands of dollars.

The challenge is that many people only think about taxes during filing season. By that point, you are looking backward at a finished tax year with no ability to change the outcome. The strategies below are designed to be executed in the fourth quarter while you still have time to act. For ongoing support throughout the year, explore our tax planning services.

1. Max Out Your 401(k) and IRA Contributions

This is the single most impactful move for most W-2 employees, yet it is surprising how often it gets overlooked. For 2026, the 401(k) employee deferral limit is $23,500, with an additional $7,500 catch-up contribution available if you are age 50 or older. Every dollar contributed to a traditional 401(k) reduces your taxable income dollar-for-dollar.

For a Bay Area professional in the 35% federal bracket and 11.3% California bracket, maxing out your 401(k) can reduce your combined tax bill by approximately $10,900. If you have not been contributing the maximum throughout the year, check whether your employer allows you to increase your deferral percentage for the remaining pay periods to catch up.

Traditional IRA contributions may also be deductible depending on your income and whether you are covered by an employer plan. If you are above the income limits for a deductible IRA, consider a backdoor Roth IRA contribution instead, which provides no current-year deduction but offers tax-free growth going forward.

2. Tax-Loss Harvesting in Brokerage Accounts

Tax-loss harvesting is the practice of selling investments that have declined in value to realize capital losses, which can then offset capital gains elsewhere in your portfolio. If your losses exceed your gains, you can deduct up to $3,000 of net capital losses against ordinary income each year, carrying forward any excess to future years.

This strategy is especially relevant for Bay Area professionals who have accumulated concentrated stock positions through equity compensation. After selling RSUs or exercising stock options, you may have significant capital gains that can be partially offset by harvesting losses in other parts of your portfolio.

Be mindful of the wash sale rule: if you repurchase a "substantially identical" security within 30 days before or after the sale, the loss is disallowed. You can work around this by reinvesting in a similar but not identical fund, such as swapping one S&P 500 index fund for a total market fund.

Review your brokerage statements in November and December to identify positions trading below your cost basis. Even small losses can add up meaningfully when your marginal rate exceeds 45% combined.

3. Charitable Giving with Appreciated Stock

If you are planning to make charitable donations, contributing appreciated stock held for more than one year is almost always more tax-efficient than donating cash. When you donate appreciated stock directly to a qualified charity or donor-advised fund, you receive a fair market value deduction and completely avoid paying capital gains tax on the appreciation.

Consider this example: you hold shares of Apple stock purchased at $50 per share that are now worth $200 per share. If you sell the shares and donate the cash, you owe capital gains tax on the $150 per share gain (at rates up to 23.8% federal plus 13.3% California, totaling as much as 37.1%). If you donate the shares directly, you skip the capital gains tax entirely and still deduct the full $200 per share value.

For Bay Area professionals with large equity positions, a donor-advised fund (DAF) offers additional flexibility. You can make a large contribution in a high-income year to maximize the tax benefit, then distribute grants to your chosen charities over time. This is particularly effective in years with large RSU vesting events or stock option exercises.

4. Roth Conversion Considerations

A Roth conversion involves moving money from a traditional IRA or 401(k) into a Roth IRA, paying ordinary income tax on the converted amount now in exchange for tax-free withdrawals in retirement. While this creates a current-year tax liability, it can be a powerful long-term strategy in the right circumstances.

Year-end is the ideal time to evaluate a Roth conversion because you have a clearer picture of your total income for the year. Situations where a conversion may be particularly advantageous include:

• Income dip years. If you changed jobs, took unpaid leave, or had lower equity compensation this year, your marginal rate may be temporarily lower than usual, making conversion more cost-effective.
• Large loss carryforwards. If you have significant capital loss carryforwards from prior years, they can offset some of the additional income from a conversion.
• Long time horizon. The younger you are, the more years of tax-free growth you gain from the conversion.
• Expectation of higher future rates. If you believe your tax rate will be higher in retirement, either from personal income growth or legislative changes, paying tax now at a lower rate is advantageous.

It is critical to run the numbers carefully before converting. A poorly timed Roth conversion can push you into a higher bracket and trigger additional taxes like the 3.8% Net Investment Income Tax. We typically model several conversion scenarios for our clients before recommending an amount.

5. Defer or Accelerate Income

If you have any control over the timing of your income, the end of the year is the time to exercise it. The basic principle is straightforward: if you expect to be in a lower tax bracket next year, defer income into the following year. If you expect to be in a higher bracket next year, accelerate income into the current year.

For W-2 employees, opportunities to shift income timing may include negotiating the timing of a year-end bonus, deferring compensation through a non-qualified deferred compensation plan if your employer offers one, or timing the exercise of stock options to fall in the more favorable year.

For self-employed professionals and business owners, the flexibility is greater. You may be able to delay invoicing clients until January, prepay deductible business expenses in December, or adjust the timing of estimated tax payments to optimize cash flow.

California taxpayers should also consider the interaction with the state's Mental Health Services Tax, which applies an additional 1% surcharge on taxable income above $1 million. If you are near that threshold, even small income timing adjustments can have an outsized impact.

Putting It All Together

None of these strategies exist in isolation. The most effective year-end tax plans coordinate multiple moves simultaneously. For example, you might harvest losses in your brokerage account while also making a large appreciated stock donation to a donor-advised fund, converting a portion of your traditional IRA to a Roth, and increasing your 401(k) deferral for the final pay periods of the year.

The key is running a tax projection in October or November that models your expected income, deductions, and credits for the full year. This projection becomes the foundation for deciding which strategies to deploy and in what amounts.

At Silicon Valley Tax, we build year-end tax plans for Bay Area professionals that typically identify $5,000 to $50,000 or more in potential savings. The window closes on December 31, so the earlier you start, the more options you have. Schedule a year-end planning consultation to review your situation before time runs out.