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Robert L. "Bob" Mahon, Tax Attorney in Seattle, Washington

Seattle, WA

Trusted tax attorney serving Seattle.

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Robert L. "Bob" Mahon is an attorney based in Seattle, WASHINGTON. The practice focuses on Tax.

Based in
Seattle, WASHINGTON
Experience
attorney
Known for
Tax
  • Handles Tax matters from Seattle, WASHINGTON.
  • Recognized with Lawyer of the Year — Tax Law (Seattle) (2018).

About Robert L. "Bob" Mahon: Robert L. "Bob" Mahon is an attorney based in Seattle, WASHINGTON. The practice focuses on Tax.

Areas of practice

Legal matters Robert takes on

Robert concentrates on tax. Each area below outlines the kind of case Robert handles, typical outcomes to expect, and how the intake process starts.

Tax cases in Seattle, Washington

Robert takes tax matters in Seattle, Washington. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Robert agrees to represent you.

Biography

Meet Robert L. "Bob" Mahon — tax lawyer in Seattle

Robert L. "Bob" Mahon is an attorney based in Seattle, WASHINGTON. The practice focuses on Tax.

Bob Mahon, chair of the firm's State & Local Tax practice, focuses his practice on helping clients minimize state and local taxes and comply with state and local tax laws. Bob represents clients in state and local tax audits, refunds, appeals, and litigation, as well as assists clients with tax planning and business transactions. Bob is the past president of the Tax Section of the Washington State Bar Association and teaches State and Local Tax as an adjunct professor at the University of Washington School of Law. He is also a frequent speaker and author on state and local tax issues.

How Robert handles tax matters

Bob Mahon, chair of the firm's State & Local Tax practice, focuses his practice on helping clients minimize state and local taxes and comply with state and local tax laws. Bob represents clients in state and local tax audits, refunds, appeals, and litigation, as well as assists clients with tax planning and business transactions. Bob is the past president of the Tax Section of the Washington…

Who Robert represents

Robert reviews new inquiries case-by-case for tax matters in Seattle and the surrounding Washington area.

Credentials

Education, bar admissions, and languages

  • The University of Iowa

    J.D. · 1995

  • Grinnell College

    BA

Jurisdictions

Robert's state bar admissions

  • Washington, Washingt

    ACTIVE

Robert studied at J.D. in The University of Iowa and BA in Grinnell College.

Law school and academic background

Robert completed J.D. in The University of Iowa and BA in Grinnell College. Formal legal training is one signal of substantive knowledge — the day-to-day practice Robert runs in Washington is where that training gets applied to real client questions.

Recognition

Recognition and thought leadership

Robert has received 7 formal recognitions from bar associations, industry bodies, and peer-review services.

  • Lawyer of the Year — Tax Law (Seattle)

    2018

  • Lawyer of the Year — Tax Law (Seattle)

    2015

  • Best Lawyers in America — Tax Law

    2026

  • Best Lawyers in America — Special Focus:

    2026

  • Best Lawyers in America — State and Local Tax

    2026

  • Best Lawyers in America — Awards:

    2026

  • Best Lawyers in America — Listed in Washington Law & Politics, "Rising Stars of Washington Law"

    2026

Legal awards and honors

Lawyer of the Year — Tax Law (Seattle) (2018). Lawyer of the Year — Tax Law (Seattle) (2015). Best Lawyers in America — Tax Law (2026). Best Lawyers in America — Special Focus: (2026). Best Lawyers in America — State and Local Tax (2026). Best Lawyers in America — Awards: (2026).

Locations

Robert L. "Bob" Mahon's office in Seattle

Robert's primary office is at 1301 Third Avenue, Suite 4200, Seattle, Washington, 98101-3099. In-person meetings are by appointment; a phone intake usually comes first.

Main office

1301 Third Avenue, Suite 4200

Seattle, Washington 98101-3099

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Client feedback

Client reviews of Robert L. "Bob" Mahon

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Hiring guide

How to hire Robert L. "Bob" Mahon — what to expect in your first consultation

Working with a new tax attorney should feel structured. Here's how the first two conversations with Robert usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

Robert charges for the initial consult. That fee is credited toward representation if you retain Robert's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Robert will tell you what matters and what doesn't.

Questions to ask a tax attorney in Seattle, Washington

A short list to run through before you commit: How many tax matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for Robert

Robert discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in tax practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every tax matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Robert confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Robert's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many tax practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Robert L. "Bob" Mahon

  • How much does it cost to hire Robert for a tax case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Robert walks through the likely range during the consult so there are no surprises.

  • Does Robert offer a free consultation?

    Robert charges for the initial consult; that fee is credited toward representation if you retain Robert's office. Some tax attorneys offer free consults — check Robert's current terms during booking.

  • How long do tax cases in Washington typically take?

    Simple tax matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Robert gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Robert take my case if I'm outside Seattle?

    Robert is licensed in Washington. Matters governed by Washington law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Robert will tell you if the case is a fit or refer you to someone closer to your court.

  • What should I bring to my first meeting with Robert?

    Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Robert will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Robert accepting new tax clients right now?

    Robert's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Areas served

Tax attorneys serving Seattle, Spokane and Tacoma in Washington

Robert handles tax matters throughout Washington. Each city below is a direct link into the search page for verified tax attorneys in that community.

More counsel

If Robert's intake is full or the fit isn't right, these tax attorneys in Seattle handle similar matters. Every profile below is verified and open to consultations.