WELCOME TO STERLING TAX
Bespoke UK and US tax advice and compliance for private clients
About
We are a UK based tax firm providing UK and US personal tax advisory and compliance services.
We provide bespoke, clear and practical solutions to our clients as they navigate the ever-growing complex UK and US personal tax environment.
We offer a high level of client service, working alongside our clients to add clarity to their UK/US tax position, building a long standing trusted relationship.
WHY CHOOSE STERLING TAX?
We are UK and US qualified tax experts with over 30 years of combined tax experience. Having worked within the Big 4 and market leaders throughout our respective careers we understand the importance of client relationships, and how these are unique to each and every client and not off the shelf.
OUR SERVICES
We offer tax services to a variety of individuals, such as employees, CEOs, retirees, private equity managers and everyone in between.
Tax Health Check
It is important to check in on your tax circumstances via a health check from time to time.
UK/US Reporting
We specialise in providing annual compliance from both a UK and US tax perspective.
One Off Events
Some circumstances are unforeseen or can be planned, we look to help our clients with both.
Delinquent Filings
If you are behind in either your UK or US tax filings, we can support on how to get your back on track.
SCHEDULE A CONSULTATION
At Sterling Tax, we believe every client deserves a bespoke approach. Contact us today to schedule a free consultation and discover how our team can help you confidently navigate the complexities of UK and US tax.
MEET THE TEAM
Mark Allsopp
I am the co-founder of Sterling Tax, having started in tax in 2007 working at various firms providing tax advice and compliance to high net worth individuals.
I am a generalist, although I specialise in Expatriation, inbounds into the UK or the US and review of investment structures for optimisation of tax efficiencies.
Rikveer Mangat
I am the co-founder of Sterling Tax, with over a decade of experience in international tax advice.
I specialise in expatriates, dual residents, and individuals with complex international holdings, such as carried interest and co-investment.
Chris Gilmartin
I began my career as a graduate in the US–UK private client team at Frank Hirth in 2012.
Over the years, I have advised a wide range of globally mobile clients, including Ultra High Net Worth Individuals, cross‑border families, and senior professionals in the technology and banking sectors. My specialist areas include deferred compensation, pension planning, and reviewing investments for tax efficiency—particularly in relation to Passive Foreign Investment Companies (PFICs).
Nic Allsopp
Most of my career has been in the tax world within the Big Four, where I specialised in administration and finance. At Sterling, I look after the day‑to‑day running of the office and manage client onboarding, making sure every new client gets a smooth, professional, and welcoming introduction to the firm.