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Restricted Stock Units: 5 Essential Tax and Financial Planning Strategies

August 1, 2025

Receiving restricted stock units (RSUs) may seem straightforward, but the tax and financial planning complexities can catch many employees off guard. Understanding these key strategies might help you avoid costly mistakes and optimize your financial outcomes.

1. Manage Tax Withholding at Vesting

The most common pitfall with RSUs is inadequate tax withholding when shares vest. Companies typically withhold taxes at a flat 22 percent rate for federal taxes (37 percent for amounts over $1 million annually), but this often falls short of your actual tax obligation. Financial planners identify this as the biggest issue they see with RSU clients. Many are surprised by large tax bills because the withholding didn’t cover their full liability.

Managing proper tax withholding is often the primary focus of RSU planning. The challenge becomes even more complex when stock prices are volatile, making it difficult to predict exact tax obligations.

Higher RSU income increases the likelihood of under-withholding. When shares can’t be sold to cover additional taxes, alternative payment methods must be planned. Quarterly estimated taxes are one option, though this becomes complicated when the current year income differs significantly from the prior year.

The most effective approach is to conduct quarterly tax projections or work with a CPA to maintain compliance with safe harbor requirements for federal taxes throughout the year.

2. Comprehensive RSU Planning Questions

While RSUs appear simpler than stock options due to their fixed vesting schedules, this perception can be misleading. Financial advisors warn that numerous organizational details can create problems without proper planning.

Key planning considerations include potential state moves during vesting periods, which trigger mobility tax issues, and coordination with ESPP purchases and stock option exercises to avoid wash sale complications. Essential questions for RSU planning include understanding personal goals, assessing wealth concentration levels, determining how much needs to be diversified, ensuring spouse awareness of concentration risks, analyzing the ratio of vested to unvested shares, tracking upcoming vests and trading windows, and evaluating prior year income impacts.

A critical concern is spousal awareness of company stock concentration. Financial planners frequently encounter situations where busy tech employees accumulate significant wealth while their spouses remain unaware that their entire financial security depends on one company’s stock performance.

3. Reduce Taxable Income During Vesting Years

Beyond harvesting capital losses, several strategies can reduce your overall tax burden in years when RSUs vest. These include maximizing 401(k) deferrals, funding Health Savings Accounts, participating in nonqualified deferred compensation plans if available, and donating appreciated company stock to donor-advised funds to exceed standard deduction thresholds.

4. The Hold Versus Sell Decision

Once RSUs vest and you own the shares, deciding whether to hold or sell becomes crucial. Financial advisors routinely recommend selling RSU shares immediately upon vesting, before significant price fluctuations occur. This recommendation is particularly strong for clients already holding substantial company stock positions, as additional concentration increases unnecessary risk.

Many clients choose to sell immediately and deploy proceeds toward other financial goals. This approach helps diversify their overall portfolio and reduces company-specific risk.

5. Navigate Trading Windows

RSU selling plans must account for company trading windows, which dictate when employees can sell shares. Understanding these restrictions is essential for effective RSU management.

When advisors recommend selling RSUs at vesting, they don’t mean selling on the exact vesting date. Instead, they mean selling when trading windows permit, typically after earnings calls. These windows usually last four to six weeks, and while exact dates can’t be predicted far in advance, historical patterns provide reasonable estimates.

Financial planners coordinate clients’ RSU vesting schedules with anticipated trading windows to develop realistic selling strategies. This coordination ensures clients can execute their plans within company restrictions while maintaining compliance with insider trading rules and any existing 10b5-1 trading plans.

Conclusion

Proper RSU planning requires understanding these interconnected elements and developing strategies that align with your broader financial goals while managing tax implications effectively.


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