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Understanding Wash Sale Rules and RSUs: Why Selling Too Soon Could Cost You

Understanding Wash Sale Rules and RSUs: Why Selling Too Soon Could Cost You

May 08, 2025

When it comes to managing your equity compensation, timing is everything—especially when it comes to taxes. One of the most commonly misunderstood pitfalls employees face is the wash sale rule, particularly for those who receive restricted stock units (RSUs) that vest on a recurring schedule.

Let’s explore a real-world example that illustrates how a well-intentioned financial move can result in an unexpected tax issue—and what you can do to avoid it.


Meet Emily: A Tech Executive Navigating Her RSUs

Emily is a high-level executive at a fast-growing tech company. Each year, she receives a 16,000-share RSU grant, which vests quarterly over four years—meaning 1,000 shares vest every quarter.

In January, 1,000 RSUs vest when her company’s stock is trading at $100 per share, giving her $100,000 worth of stock. She decides to hold onto it.

By mid-March, the company’s stock drops to $80 per share. Emily sells her January shares, locking in a $20,000 capital loss.

But just two weeks later, at the end of March, another 1,000 RSUs vest—right within the 30-day wash sale window.


The Wash Sale Rule: A Hidden Tax Trap

The wash sale rule disallows a loss for tax purposes if you sell a security at a loss and repurchase the same or substantially identical security within 30 days before or after the sale.

Even though Emily didn’t manually buy the stock again, RSU vesting is considered an acquisition. Because her next vesting occurred within 30 days of her sale, Emily triggered a wash sale, and the IRS disallows her $20,000 loss for this tax year.

Instead, that loss gets added to the cost basis of her newly vested shares. So while she’ll recover the loss down the road when she sells those new shares, she misses out on the immediate tax benefit she was expecting this year.


The Problem with Trading Windows

Here’s the real challenge: like many executives and employees subject to insider trading policies, Emily can only sell her stock during designated open trading windows—typically a few days after earnings are released.

Often, those trading windows overlap closely with RSU vesting dates, especially if vesting is tied to calendar quarters. That means if she wants to sell prior RSUs during that window—and the stock is down—she’s almost guaranteed to trigger the wash sale rule if a new batch is vesting within 30 days.

So what can she do?


What Can You Do About It?

Fortunately, there are a couple of strategic solutions that can help you avoid wash sales and optimize your RSU strategy.

1. Sell RSUs Immediately Upon Vesting

One proactive strategy is to sell your RSUs immediately upon vesting. This allows you to:

  • Avoid future wash sale issues because no previous lots exist that were sold at a loss;

  • Lock in your compensation at the fair market value on the vest date;

  • Reinvest proceeds into a diversified portfolio aligned with your goals and risk tolerance.

This strategy helps you reduce concentration risk in your company stock while also simplifying your tax situation.

2. Set Up a 10b5-1 Trading Plan

Another powerful solution is to establish a Rule 10b5-1 trading plan, which is a prearranged, SEC-compliant plan that allows insiders to sell shares on a preset schedule, even outside open trading windows.

By working with your advisor and legal/compliance teams, you can structure a 10b5-1 plan to ensure that stock sales are scheduled more than 30 days away from future RSU vesting dates, helping you avoid wash sale issues altogether.

A properly designed 10b5-1 plan not only enhances tax efficiency, but also creates a disciplined and rules-based approach to equity compensation management—which can be especially helpful in volatile markets.


Final Thoughts: Plan Proactively

Equity compensation is one of the most powerful wealth-building tools available—but it comes with tax complexity. If you’re receiving large annual RSU grants that vest quarterly, it’s essential to understand the timing and tax rules involved—especially the wash sale rule.

With thoughtful planning—whether through immediate sales or a 10b5-1 plan—you can avoid costly surprises and better align your equity compensation with your long-term financial goals.


Are you facing these challenges with your own RSUs? Connect with an advisor who understands executive compensation and tax planning to help you make the most of your hard-earned equity. Schedule an introductory call today!