Contact Interactive Brokers

The main Interactive Brokers US phone number is +1-203-618-5800. This line serves clients calling from the United States and internationally for general account inquiries, trading support, and technical assistance. Phone support operates Monday through Friday during extended US market hours. When calling, clients should have their Interactive Brokers account number available and be prepared to complete identity verification through security questions or the IB Key authentication system. For clients outside the United States, Interactive Brokers maintains regional phone numbers in Canada, the United Kingdom, across Europe, Hong Kong, Singapore, Japan, and Australia. These regional numbers provide support in local languages during local business hours and can handle account inquiries specific to the regulatory framework of each jurisdiction. Regional support teams understand the local market structure and regulatory requirements relevant to clients in their coverage area, ensuring accurate guidance for region-specific questions.

Interactive Brokers' global headquarters and primary US office is located at One Pickwick Plaza, Greenwich, Connecticut 06830, United States. This address houses executive leadership, client services operations, and technology development teams. For account-related correspondence, deposits by check, and legal documents, clients should use the specific mailing address provided in their Client Portal account management section, as different departments and regional entities may have dedicated postal addresses. For regulatory filings and legal service of process, the One Pickwick Plaza address serves as the registered office of Interactive Brokers LLC. Clients in Canada, Europe, and Asia-Pacific should refer to the contact information for their specific Interactive Brokers regional entity. Always verify the correct mailing address for your specific Interactive Brokers entity and department before sending time-sensitive documents, as using an incorrect address may delay processing.

To send a secure message to Interactive Brokers, log into Client Portal and navigate to the Message Center. Select Compose to create a new inquiry, choose the relevant department from the dropdown menu — options include Account Services, Trading Support, Technical Assistance, Funding and Banking, Tax and Regulatory, and Compliance — then write your message and attach any supporting documents. The secure message center encrypts all communications using the same TLS 1.3 protocol that protects trading and account data. Because messages are associated with your authenticated account session, additional identity verification is not required for message center communications. Interactive Brokers typically responds to secure messages within one business day. The message center maintains a complete, searchable history of all your support interactions. For urgent trading issues, phone support provides faster response times during market hours, while the secure message center is ideal for inquiries that benefit from a written record and document attachments.

Interactive Brokers maintains operational offices and regulated entities across major financial centers worldwide. The US headquarters is at One Pickwick Plaza, Greenwich, CT 06830. The Chicago office focuses on options and futures trading operations. In Europe, the Zug, Switzerland office serves as the European headquarters, with additional offices in London (UK and EMEA operations), Dublin (Ireland regulated entity), and Budapest (Central European operations). Asia-Pacific offices include Hong Kong (regional headquarters for Asia), Singapore, Tokyo, Sydney, and Mumbai (technology development center). Canadian operations run through Interactive Brokers Canada Inc. in Montreal. Each regional office operates under the regulatory framework of its jurisdiction. For the most current office addresses and contact details, consult the Contact section within Client Portal or the Interactive Brokers website. Some offices may not offer walk-in service — always contact the office by phone before visiting in person to confirm availability and any appointment requirements.

Interactive Brokers organizes support by department to route inquiries efficiently to the appropriate team. For account opening, applications, and account maintenance, contact Account Services. For trading platform questions, order issues, and market data, contact Trading Support. For TWS installation, API connectivity, and platform errors, contact Technical Assistance. For deposits, withdrawals, wire transfers, and currency conversion, contact Funding and Banking. For tax forms, regulatory compliance, and account restrictions, contact Tax and Regulatory. For privacy concerns, complaints, and legal matters, contact Compliance. When using the secure message center in Client Portal, select the relevant department from the dropdown menu. When calling phone support, the representative can transfer you to the appropriate department. The SEC maintains regulatory resources at sec.gov and the Financial Industry Regulatory Authority provides investor education at finra.org for those seeking additional context about broker-dealer operations and oversight.