Year-End Tax Planning for Stock Compensation and Brokerage Accounts

If you have company stock that vested or you’ve used your brokerage account for a major expense this year, there are some year-end tax considerations worth understanding as they can create unexpected tax bills.

Stock Compensation and Taxable Income

A couple came to us for tax planning support. They were used to having sizable tax payments each year. But this year was different. Multiple lots of company stock vested at once, creating a much bigger income event than they normally have. They had no idea what kind of impact this would have on their taxes.

When your restricted stock units or stock options vest, that’s treated as ordinary income, even if you don’t sell a single share. If you’re not planning for this, you can end up with a large tax bill and no cash to pay it because the money’s tied up in company stock.

Planning for Stock Vesting

One approach is to model out vesting schedules at the beginning of each year. This means looking at what’s vesting, when it’s vesting, and whether you may need to set aside cash or adjust your withholdings to cover the potential tax impact.

Some people choose to sell shares immediately at vesting to cover the tax liability. Others prefer to hold, but then they build a separate tax reserve.

Questions worth reviewing before year-end:

• Did any shares vest this year that you haven’t addressed?
• What’s vesting next year, and when?
• What’s your plan when those shares vest—sell immediately or hold?
• Have you modeled out what you may owe in taxes?

If you’re not clear on the answers, these are worth thinking through.

Brokerage Account Sales and Capital Gains

Stock compensation is one way people can end up with unexpected tax bills. Another situation happens when you use your brokerage account—what we refer to as a lifestyle account—for bigger expenses.

A client came to us after her previous advisor had sold positions for a few bigger expenses, like a car and a big family trip. She had the cash she needed, but when we started working together, she realized she owed significantly more in federal capital gains taxes on those sales than she was used to paying.

Now she needed to sell more investments to pay the tax bill, which would trigger more capital gains, which meant more taxes the following year. It’s a cycle that’s hard to break once you’re in it.

Understanding the Tax Impact

When you sell investments in a regular brokerage account, you may be triggering capital gains taxes. If you’re not planning for that, you can end up selling more the next year to cover the taxes, which compounds the problem.

This applies to any big expense where you liquidate investments: a down payment, a renovation, a car purchase, a large vacation, even paying a tax bill from the previous year.

Approaches for Raising Cash

Planning before you need the cash can make a difference. If you know you’ll need a specific amount—let’s say $150,000—for a down payment or a big purchase, there are different approaches to consider for raising that money.

Options might include spreading sales across two years to stay in a lower capital gains bracket, harvesting losses to offset gains, or using a line of credit temporarily. There are different approaches, but they work better when you plan ahead.

If you’ve already sold investments this year, calculating what you may owe in capital gains taxes can help you plan for that payment. And if you’re thinking about tapping your brokerage account for a big expense in the upcoming year, now’s a good time to think through the approach.

Why Year-End Review Matters

High earners are often dealing with multiple moving pieces: bonuses, stock compensation, multiple retirement accounts, brokerage accounts, maybe rental properties or a side business. Each has tax implications. If you’re not looking at the full picture, you may be overpaying in taxes or setting yourself up for a surprise.

Year-end is your last chance to make adjustments before the calendar flips. That might mean maxing out a Health Savings Account contribution, harvesting some losses to offset gains, or adjusting your withholdings for next year. Once January 1st hits, many of those opportunities are gone.

Moving Forward

If you’re not reviewing your tax situation before year-end, you may be leaving money on the table or setting yourself up for an unexpected tax bill.

We help clients work through these considerations and figure out what moves might make sense for their specific situation.

If you want to talk through yours, let’s schedule a time: https://capsouthwm.com/connect-with-us/

Investment advisory services are offered through CapSouth Partners, Inc, dba CapSouth Wealth Management, an independent registered Investment Advisory firm. Information provided by sources deemed to be reliable. CapSouth does not guarantee the accuracy or completeness of the information. This material has been prepared for planning purposes only and is not intended as specific tax or legal advice. CapSouth does not offer tax, accounting or legal advice. Please consult your tax or legal advisor to discuss your specific situation before making any decisions that may have tax or legal consequences. This article was produced with the assistance of Claude Sonnet 4.5 (Nov25), an artificial intelligence model developed by Anthropic PBC. CapSouth is not affiliated with Anthropic.