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​Tax Preparation for Silicon Valley Technology Professionals

Technology professionals often face tax issues that extend well beyond a traditional Form W-2. Restricted stock units, employee stock purchase plans, stock options, investment transactions, and multistate income can make an otherwise ordinary tax return considerably more complex.

Claeys Wolkens & Associates specializes in serving technology professionals with RSUs, ESPPs, incentive and nonstatutory stock options, startup equity, stock sales, and multistate filing requirements. Approximately 95% of the clients we serve work in technology, including employees of major public technology companies and Silicon Valley startups.

From our Palo Alto location, we serve clients throughout Silicon Valley using a secure and convenient virtual tax preparation process. Our clients receive personal assistance from our small team of experienced tax professionals, comprehensive federal and state tax preparation, and year-round guidance when questions and important financial decisions arise.​
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Tax Expertise for the Technology Community

Compensation packages offered by technology companies frequently combine salary, bonuses, equity awards, employee stock purchase benefits, and other incentives. Each component can have different tax consequences, reporting requirements, and withholding rules.

We regularly assist technology professionals with:
  • Restricted Stock Units (RSUs)
  • Employee Stock Purchase Plans (ESPPs)
  • Incentive Stock Options (ISOs)
  • Nonstatutory Stock Options (NSOs)
  • Startup and pre-IPO equity
  • Stock sales and brokerage reporting
  • Alternative Minimum Tax considerations
  • Equity compensation earned in multiple states
  • Federal and California estimated tax payments
  • Backdoor Roth IRA reporting
  • Investment and cryptocurrency transactions
  • Rental and vacation rental properties
  • Foreign accounts and foreign tax credits
  • Relocations into or out of California

Our experience with these matters helps us recognize reporting issues that may be overlooked when equity compensation is treated as an ordinary investment transaction.

Restricted Stock Units

RSUs are generally reported as compensation when they vest, with the income included on Form W-2. When the shares are later sold, the transaction is also reported by the brokerage firm on Form 1099-B.

This creates a common opportunity for errors. The cost basis reported to the IRS may be missing or may not reflect the compensation income already included on the employee’s Form W-2. If the cost basis is not properly adjusted on the tax return, the same income can effectively be taxed twice.

RSU withholding can also be insufficient for highly compensated employees. Even when shares were withheld for taxes at vesting, the amount withheld may not cover the employee’s actual marginal federal and California tax rates. We review the complete transaction and help clients understand whether additional withholding or estimated payments may be appropriate.

Employee Stock Purchase Plans

An ESPP allows an employee to purchase company stock, frequently at a discount. When the shares are sold, part of the income may be treated as compensation and part may be treated as a capital gain or loss.

The calculation depends on several factors, including:
  • The grant and purchase dates
  • The price paid for the shares
  • The fair market value on the relevant dates
  • The discount provided through the plan
  • How long the employee held the shares
  • Whether the sale was a qualifying or disqualifying disposition
  • Whether compensation income was included on Form W-2

Brokerage statements do not always provide all the information needed to calculate the transaction correctly. We reconcile the brokerage reporting with the employer’s supplemental documents and the employee’s Form W-2.

Incentive and Nonstatutory Stock Options

Stock options can create substantially different tax consequences depending on the type of option and when it is exercised or sold.

Exercising an incentive stock option may create an Alternative Minimum Tax adjustment even though the employee has not sold the stock or received cash from the transaction. A later sale may also require separate regular-tax and AMT basis calculations.

Nonstatutory stock options generally create compensation income when exercised. Subsequent stock sales must then be reported using an adjusted cost basis that reflects the compensation previously recognized.

We help clients understand how these transactions appear on their tax returns and identify the documents needed to report them properly.

Startup Equity and Liquidity Events

Employees and founders of privately held companies may receive stock options, restricted stock, or other forms of startup equity long before a public market exists for the shares. An exercise, tender offer, acquisition, secondary sale, or initial public offering can create significant and sometimes unexpected tax consequences.

Depending on the circumstances, tax considerations may include:
  • Section 83(b) elections
  • ISO exercises and Alternative Minimum Tax
  • Holding-period requirements
  • Qualified small business stock considerations
  • Compensation income
  • Short-term or long-term capital gains
  • Estimated tax payments
  • California residency and sourcing
  • Equity earned while working in multiple states

Because important decisions may occur before a tax return is due, we encourage clients to contact us during the year and before completing a significant equity transaction whenever possible.

Multistate Taxation of Equity Compensation

Technology professionals frequently relocate, work remotely, travel between company locations, or change employers while their equity awards continue to vest.

In some circumstances, more than one state may claim the right to tax a portion of the compensation. The result can depend on where the employee lived and worked during the period between the grant and vesting or exercise of an award.

We prepare multistate individual returns and help clients address matters involving:
  • Moving into or out of California
  • Remote work for an employer located in another state
  • Equity earned while services were performed in multiple states
  • Part-year residency
  • Nonresident state filings
  • Credits for taxes paid to another state
  • State withholding that does not match the final allocation of income

​More Than Annual Tax Preparation

Our relationship with clients does not end when the tax return is filed. We remain available throughout the year to answer general questions and provide guidance concerning upcoming transactions and tax-related decisions.

Many general questions can be answered without an additional charge. If a request requires calculations or a formal tax projection, our standard billable rate may apply. We always discuss potential charges in advance.

Year-round services may include:
  • Federal and state income tax projections
  • Estimated payment calculations
  • Withholding guidance
  • Planning before exercising or selling equity
  • Reviewing the tax effect of a relocation
  • Guidance following a major stock sale
  • Assistance with IRS and state tax notices

A Secure and Convenient Virtual Process

Our virtual tax preparation service allows clients to work with us from home, the office, or while traveling. There is ordinarily no need to make visits to our tax office.

Our process includes:
  1. Complete our online inquiry form and tell us about your tax situation.
  2. Receive a transparent quote before deciding whether to proceed.
  3. Meet with us by video conference to discuss your filing and questions.
  4. Upload your documents through our secure client portal.
  5. Review your completed return electronically and have your questions answered.
  6. Sign electronically and receive confirmation after your returns are filed.

Throughout the engagement, you will have access to experienced tax professionals who understand your filing and are available to answer questions.

Serving Palo Alto and Silicon Valley

Our Silicon Valley location provides a convenient professional presence for clients in Palo Alto and throughout the surrounding technology community, including Mountain View, Cupertino, Menlo Park, Redwood City, Sunnyvale, Santa Clara, and San Jose.
Meetings are available by appointment. Our secure virtual service is available to clients throughout California and across the United States.

Get Started

​If you receive RSUs, ESPP shares, stock options, startup equity, or compensation from multiple states, we invite you to tell us about your tax situation. We will review the information you provide and send you an upfront quote for the services you need.
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© COPYRIGHT 2026 CLAEYS WOLKENS & ASSOCIATES, INC.  ALL RIGHTS RESERVED.
Important Tax Disclosure
IRS Circular 230 Legend: Any advice contained herein was not intended or written to be used, and cannot be used, for the purpose of avoiding U.S. federal, state, or local tax payments or penalties. Unless otherwise specifically indicated, you should assume that any statement in this website or articles that relating to any U.S. federal, state, or local tax matter was written in connection with the promotion or marketing. Disclaimer: Any articles herein is designed for general information only. The information presented at this site should not be construed to be formal legal or tax advice. Each taxpayer should seek advice based on the taxpayer's particular circumstances.

Claeys Wolkens & Associates is an independent tax firm and is not affiliated with, sponsored by, or endorsed by any employer or technology company referenced on this website.
  • Home
  • Services
    • Individual
    • Business
  • Virtual Service
  • Locations
  • About
  • Contact Us
  • Client Resources
    • Portal
    • Portal Instructions
    • Tax Statements
    • Sale of Home
    • Blog
    • Form 1099-NEC
    • IRS Refund Status
    • State Refund Status
    • Filing Extensions
    • Forms
    • Transcripts
    • FBAR Foreign Bank Account Reporting
    • Depreciation Schedule
    • OBBBA