Harrison Swift

Harrison Swift is an independent tax advisory firm founded in 2023 and headquartered in London, United Kingdom. The firm focuses exclusively on private client US and UK taxation, serving expatriates, international professionals, dual-resident taxpayers, and individuals with cross-border tax obligations. With a team size under 49, Harrison Swift offers a minimum budget range of $1,000 to $10,000 and an average hourly rate of $20.

The firm’s core services include business consulting, tax preparation, and accounting expertise. It provides comprehensive support across US federal and state tax returns, UK personal tax compliance, expatriate tax planning, voluntary disclosures, and strategic tax advisory. Harrison Swift also acts as a liaison with tax authorities such as the IRS and HMRC to ensure compliance and risk mitigation.

Harrison Swift primarily serves clients in the finance, corporate services, and legal industries, with a specific focus on startups navigating complex cross-border tax environments. The firm’s expertise is built on a combination of US and UK tax qualifications, including a US Enrolled Agent and UK Taxation Technician on the leadership team.

Client feedback on Google is exceptionally positive, with a 5.0 rating across seven reviews. Clients frequently praise the firm’s deep technical knowledge, responsive communication, and ability to handle complicated tax situations. Some reviews note that while the service is not the cheapest, the peace of mind and specialized expertise justify the cost.

The team includes several experienced managers and assistants, such as a Senior Manager, Director of Operations, and Assistant Manager, all dedicated to cross-border tax advisory. Harrison Swift’s client portfolio includes work in the legal, finance, and corporate services sectors, reflecting the firm’s ability to cater to both individual and business clients with dual-jurisdiction tax needs.