CO

Colin Oldberg, Tax Attorney in Denver, Colorado

Denver, CO

Trusted tax attorney serving Denver.

Practices in

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Quick answer

Colin Oldberg is an attorney based in Denver, COLORADO. The practice focuses on Tax.

Based in
Denver, COLORADO
Experience
attorney
Known for
Tax
  • Handles Tax matters from Denver, COLORADO.
  • Recognized with Best Lawyers in America — Tax Law (2026).

About Colin Oldberg: Colin Oldberg is an attorney based in Denver, COLORADO. The practice focuses on Tax.

Areas of practice

Practice areas handled by Colin Oldberg

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

Tax cases in Denver, Colorado

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

Biography

About Colin Oldberg — Attorney of Colorado tax experience

Colin Oldberg is an attorney based in Denver, COLORADO. The practice focuses on Tax.

Colin skillfully guides businesses and non-profit organizations through crucial tax decisions at the federal, state, and local levels.

He focuses his practice on federal income tax, including formation, structure, and operation of tax-exempt entities, low-income housing and alternative energy tax credits, mergers and acquisitions, fund formation, and a variety of other corporate and partnership tax matters. He also helps businesses find efficient tax solutions through his experience working on a range of state and local transactional taxation issues, including sales and use tax considerations for asset transactions and property tax exemptions. Clients of all sizes look to Colin for advice on a variety of business tax decisions in industries including energy and resources, oil and gas, and pet care.

Before joining Holland & Hart, Colin worked as an Appellate Law Clerk for Judge Anthony J. Navarro of the Colorado Court of Appeals, where he drafted nearly 30 civil and criminal judicial opinions.

Colin's approach to tax cases

Colin skillfully guides businesses and non-profit organizations through crucial tax decisions at the federal, state, and local levels. He focuses his practice on federal income tax, including formation, structure, and operation of tax-exempt entities, low-income housing and alternative energy tax credits, mergers and acquisitions, fund formation, and a variety of other corporate and partnership…

Clients Colin works with

Colin reviews new inquiries case-by-case for tax matters in Denver and the surrounding Colorado area.

Credentials

Colin Oldberg's legal education and bar admissions

  • University of Colorado at Boulder

    J.D. · 2017

Colin studied at J.D. in University of Colorado at Boulder.

Law school and academic background

Colin completed J.D. in University of Colorado at Boulder. Formal legal training is one signal of substantive knowledge — the day-to-day practice Colin runs in Colorado is where that training gets applied to real client questions.

Recognition

Awards, publications, and recognition of Colin Oldberg

Colin has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

  • Best Lawyers in America — Tax Law

    2026

Legal awards and honors

Best Lawyers in America — Tax Law (2026).

Locations

Colin Oldberg's office in Denver

Colin's primary office is at 675 Fifteenth Street, Suite 2900, Denver, Colorado, 80202. In-person meetings are by appointment; a phone intake usually comes first.

Main office

675 Fifteenth Street, Suite 2900

Denver, Colorado 80202

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Client feedback

Client reviews of Colin Oldberg

Colin has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.

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Hiring guide

How to hire Colin Oldberg — what to expect in your first consultation

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

Consultation formats and pricing

Colin charges for the initial consult. That fee is credited toward representation if you retain Colin'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; Colin will tell you what matters and what doesn't.

Questions to ask a tax attorney in Denver, Colorado

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 Colin

Colin 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. Colin confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Colin'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 Colin Oldberg

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

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

  • Does Colin offer a free consultation?

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

  • How long do tax cases in Colorado 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. Colin gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Colin take my case if I'm outside Denver?

    Colin is licensed in Colorado. Matters governed by Colorado law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Colin 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 Colin?

    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. Colin will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Colin accepting new tax clients right now?

    Colin'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 Denver, Colorado Springs and Boulder in Colorado

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

More counsel

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