Creating Sustainability in U.S. Expansion
Case Study: Ampere Analysis × TaxStudio
A Story of Patience, Partnership, and the Long Game of U.S. Expansion
When London-based Ampere Analysis decided to enter the U.S. market, they weren’t chasing speed, they were chasing sustainability. Their leadership team understood that expansion wasn’t a single decision; it was a series of thoughtful, interlocking steps. Each one required trust, precision, and local insight.
For many international companies, the U.S. feels like the land of opportunity, and bureaucracy. Multiple states. Conflicting rules. Layers of compliance that can quickly turn ambition into anxiety. Ampere’s leadership team rooted in the UK wanted to do it right from the start, the biggest needs being: “Setting up a new entity in the U.S., tax advisory and accounts support.”
Building the Foundation Before the First Brick
Ampere’s connection with TaxStudio began well before launch, through early conversations that helped shape a thoughtful, well-timed U.S. entry.
Jason Booth recalls the early conversations vividly.
“Dan and I first talked about forming a US subsidiary circa 2016, it was formed in 2019, and operational in 2021. The beauty of Ampere’s story of expanding into the US is the way Dan, Guy, Rebecca and the team approach business. Organized, thoughtful and patient.”
That patience became Ampere’s superpower. Rather than rushing into a launch, they spent years assembling the right ecosystem—HR, legal, tax, accounting—so when they did move, it would be seamless.
“They slowly built resources around them from HR, to legal, to tax to make sure that when they were ready to go, they had a team ready.”
The Challenge: Turning a Complex System into a Smooth Operation
Once the U.S. entity was formed, the next challenge was bringing it to life: navigating multi-state tax rules, establishing payroll, managing cross-border accounting, and addressing transfer pricing. These are the parts of expansion that no one puts on the highlight reel, but they’re the parts that can make or break a launch.
“Ampere Analysis has had to tackle most of the often faced issues when expanding into the US - they’ve dealt with inter-company agreements on how to address transfer pricing, how to efficiently consolidated financials cross-border, revenue recognition, immigration, sales tax issues, employment, office leases, income tax, etc.”
For a team still headquartered in the UK, having someone on the ground mattered.
“The team at TaxStudio have been an invaluable support in getting to grips with US financial and legal practices, providing on going accounting, filing and compliance support.” - Headquarters @ Ampere Analysis
That support became the thread that tied together every new milestone—from first hires to first state expansion.
The Process: Calm, Measured, and Collaborative
If you ask TaxStudio’s CEO what made this partnership work, he doesn’t talk about complexity, he talks about communication.
“We’ve tackled a gambit of issues and one of the best things about working with them is their ability to stop and listen, for us to stop and listen on what they are wanting / trying to do and then tackle the task at hand.”
This wasn’t a relationship defined by crises or fire drills. It was about “blocking and tackling”, methodically solving each piece of the U.S. puzzle before moving on to the next.
“No material issues on hurdles other than just slowly tackling each item that has come up over the years, staying responsive, and being good at what we do.”
That rhythm created something rare in expansion work: calm.
The Turning Point: Confidence Across the Atlantic
As Ampere grew into their new market, TaxStudio helped them scale with stability, refining accounting systems, managing payroll, and setting up sales tax compliance as revenue thresholds were crossed.
“TaxStudio has provided the necessary support as we hit new income thresholds, guiding us through sales tax set up and refining our accounting practices as we scale.”
The result was not just compliance but also confidence.
“Helped us feel secure and confident in our US compliance and accounting, our leadership are based in the UK so having the local knowledge and support from TaxStudio is critical for the smooth and compliant running of our US business. Just generally getting our head around US state based tax compliance would have been extremely challenging without the support of Jason and his team.”
That reassurance allowed Ampere’s leadership to stay focused on growth.
“They’ve continued to have steady growth here in the US and have just hired their first employee on the east coast in New York. This hiring decision has led us into detailed conversations with them on what it means to have physical presence in New York for sales tax, income tax and payroll obligations. They’ve continued to have steady growth and just recently expanded outside of California where they have only been based on hired in New York so have been working with them on what it means to be in New York.” - Jason Booth, CEO @ TaxStudio.
The Relationship Today
Years later, the partnership still runs smoothly. There’s no sense of “finished” here, just evolution.
“We communicate well and enjoy the ability to work with them to tackle what comes their way.” - Jason Booth, CEO of TaxStudio.
Ampere continues to grow steadily, adding new contracts and building their U.S. footprint. TaxStudio continues to act as their steady hand—responsive, practical, and deeply familiar with their operations.
Jason predicts their company to continue to grow and thrive in the United States,
“They might have more ad hoc things coming up as they grow and expand in the US, which we are more than willing and able to handle alongside them. ”
The Takeaway
For Jason and the team at TaxStudio, Ampere’s story represents something every founder should remember about U.S. expansion:
“Ampere Analysis to me is a great story of patience, be thoughtful in your approach to tapping into the US market and get partners in early and keep them abreast of what you are doing. I love their organizational skills, their willingness to come prepared for calls and get the most out of our time. The foundation to grow is now here!”
In the end, the foundation they built together became the quiet success behind every U.S. client meeting, every state filing, and every confident decision made from 5,000 miles away.
Quick Facts
Client Engagement Rating: 9/10 - we are proud of this generous rating and know we can always do better at serving our clients.
Timeline: First conversation (2016) → Formation (2019) → Operational launch (2021)
Key Services: U.S. entity setup, ongoing accounting, payroll, sales tax, and compliance advisory
Collaborators: Nano Law (LA)
Biggest win in this expansion process: Peace of mind, clear structure, and a strong foundation to scale