How to Choose a Tax Advisor Specialized in Equity Compensation

Executive Summary

Equity compensation creates tax complexity that many generalist CPAs never encounter. AMT on ISO exercises, 83(b) elections, QSBS exclusions, multi-state vesting, and expat sourcing rules require specialized knowledge. Choosing the wrong advisor can mean missed opportunities (e.g., AMT credit recovery), overpayment (e.g., double taxation from cost basis errors), or audit exposure.

The bottom line: Not all tax advisors are equal. A CPA who primarily serves small business owners may not understand your ISO exercise or AMT. Ask pointed questions, check credentials, and understand the fee structure. For simple situations (RSU vesting, single state, no AMT), DIY or a basic preparer may suffice. For ISO exercises, AMT, M&A, or expat situations, you need someone specialized.

Critical Warning: Be wary of advisors who push investment products (e.g., "roll your 401(k) into our managed account") as a condition of tax advice. Fee-only advisors who do not sell products have fewer conflicts of interest. AUM-based advisors may be fine—but ensure the tax advice is not secondary to asset gathering.

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When to DIY vs. When to Hire

DIY May Be Sufficient If:

• Simple RSU vesting — You only have RSUs, sell at vesting, single state, W-2 is correct
• Single equity type — No ISOs, no NSOs, no AMT exposure
• No major life events — No relocation, no M&A, no IPO
• Comfort with tax software — TurboTax, H&R Block, or Free File can handle most W-2 + 1099-B scenarios

Caveat: Even "simple" RSU situations can have cost basis errors. See our Cost Basis Guide. If your 1099-B shows $0 basis for RSUs, you need to adjust—or you may double-tax yourself.

You Should Hire When:

• ISO exercise — AMT crossover point, Form 6251, Form 8801 credit recovery
• 83(b) election — Timing, filing, state conformity
• QSBS — Qualifying for Section 1202 exclusion
• Multi-state or expat — Sourcing rules, residency, treaty issues
• M&A or IPO — Golden parachute (280G), accelerated vesting, lockup
• Complex estate planning — Gifting equity, SLATs, GRATs
• IRS notice or audit — Representation before the IRS

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Credentials: CPA vs. EA vs. Tax Attorney

Key points:

• CPAs and EAs can represent you before the IRS (audits, appeals, collections). EAs are specifically trained in tax and have no state licensing—they're federally authorized.
• Tax attorneys offer attorney-client privilege—communications may be protected in ways that CPA communications are not. For sensitive situations (e.g., potential audit, estate disputes), this can matter.
• Financial planners (CFP, etc.) may offer tax planning but often are not tax specialists. Some CPAs are also CFPs—that combination can be valuable for holistic planning.

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Questions to Ask

Experience

1. How many clients do you have with stock options, RSUs, or startup equity? — Look for a number, not "some" or "a few."

2. Have you handled AMT planning for ISO exercises? — If they hesitate or give a generic answer, they may not have depth.

3. Do you work with expats or multi-state employees? — Sourcing rules for equity are complex.

4. Have you advised on 83(b) elections, QSBS, or NQDC? — These are advanced topics.

5. Can you explain the AMT crossover point? — A good specialist can explain it clearly. If they can't, they're not the right fit.

Process and Fees

6. What is your fee structure? — Hourly, flat fee, or AUM? Get a range for your situation.

7. What is included in the fee? — Tax return only? Planning? Estimated tax projections? Audit support?

8. How do you communicate? — Email, phone, portal? Response time?

9. Do you provide a written engagement letter? — Scope of work, fees, deliverables.

Conflicts

10. Do you sell investment products or receive commissions? — Fee-only advisors have fewer conflicts.

11. Do you require that I move assets to you for management? — Some firms bundle tax and AUM; ensure the tax advice is not contingent.

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Red Flags

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Fee Structures

Tip: For a one-time complex situation (e.g., ISO exercise, AMT planning), hourly or flat fee is often best. For ongoing planning (annual returns, estimated taxes, life events), a subscription or retainer can make sense.

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Where to Find Advisors

• Referrals — Ask colleagues in tech, especially those with similar equity (startup vs. public company).
• Professional associations — AICPA, state CPA societies, NASBA (CPA verify).
• Specialized firms — Some firms focus on tech employees, startups, or expats. Search for "equity compensation CPA" or "tech employee tax."
• IRS directory — irs.gov/tax-professionals/choose-a-tax-professional — Verify credentials and check for disciplinary history.

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Key Takeaways

1. Equity compensation is specialized — Many advisors lack depth. Ask specifically about experience.
2. CPA or EA for most situations — Tax attorney for 280G, estate, or legal disputes.
3. Ask pointed questions — AMT crossover, 83(b), QSBS. If they can't explain, keep looking.
4. Understand fees — Hourly, flat, or AUM. Get a clear estimate.
5. Red flags — No equity experience, product pressure, vague fees.
6. DIY when simple — But watch for cost basis errors even in "simple" cases.

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Disclaimer: This guide is for educational purposes. It does not constitute tax, legal, or financial advice. Tax advisor selection is a personal decision. Always verify credentials and conduct your own due diligence. The authors accept no liability for actions taken based on this content.

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Primary Sources

Last Updated: March 2026 | Research Team: VestingStrategy