Withholding Tax Advisory Attorneys

Committed to Helping You Understand Withholding Regulations

If you are a foreign corporation or individual investing in the United States or a U.S. company making payments to foreign persons, chances are, the recently-issued U.S. nonresident alien withholding regulations affect you. These new rules are voluminous and complex, and the consequences for failure to comply with their substantive or documentation requirements may be harsh. The withholding rules cannot be considered in a vacuum; you also need to understand how they interact with tax treaty provisions and with various anti-abuse rules, such as the “conduit” regulations.

Castro & Co. can help protect your rights and educate you about withholding tax regulations in the U.S. Call (833) 227-8761 to schedule a free initial consultation.

How Our Withholding Tax Advisory Lawyers Can Help

If you are a foreign corporation or individual investing in the United States, we can help you understand the rules, structure your investments to minimize or even eliminate withholding tax, fully benefit from the portfolio interest exception, utilize finance subsidiaries in treaty-favored jurisdictions to attract global investors, and satisfy the complicated documentation requirements.

If you are a U.S. withholding agent, we can help you comply with your withholding obligations and avoid liability by providing the following services:

  • Analyze how the withholding rules apply to your facts.
  • Structure your investments so as to eliminate or minimize withholding.
  • Analyze how treaties impact your withholding obligations.
  • Determine whether and how the conduit rules may affect your withholding obligations.
  • Ensure that you comply with relevant regulation requirements.
  • Negotiate Qualified Intermediary agreement with the IRS on your behalf.

Call Castro & Co. for legal representation from relentless and reliable international tax attorneys at (833) 227-8761! Serving Washington DC, Miami, Dallas and Orlando and clients all over the world.


  • Already referred a lot of my friends and family members .

    - Ben T.

  • They answer every question you have so you aren't left with doubts.

    - Noemi M.

  • They look out for their clients and give great advice.

    - Kim W.

  • Professionalism approach, competencies, and courtesy.

    - Ettore D.

  • Castro & Co. went above and beyond.

    - Ellen B.

  • Knowledgeable, up-to-date, and easy to work with.

    - Tony P.

Request a Free Consultation at Castro & Co.

    • Please enter your name.
    • Please enter your phone number.
    • This isn't a valid email address.
      Please enter your email address.
    • Please make a selection.
    • Please enter a message.
Get Started Today


  • Washington DC

    The Bethesda Office Building 1701 Pennsylvania Ave NW, Suite 200 Washington DC, 20006

  • New York

    30 Broad Street, Suite 1400 New York, NY 10004

  • Los Angeles

    355 South Grand Avenue, Suite 2450 Los Angeles, CA 90071

  • Dallas

    The North Galleria Tower 13155 Noel Road, Suite 900 Dallas TX, 75240

  • Miami

    The Bank of America Tower 701 Brickell Ave, Suite 1550 Miami FL, 33131

  • Seattle

    1001 Fourth Avenue, Suite 3200 Seattle, WA 98154

  • Orlando

    The North Plaza Tower 121 South Orange Ave, Suite 1500 Orlando, Florida 32801

  • Chicago

    AON Center 200 East Randolph Street Suite 5100 Chicago, Illinois 60601