Corporate tax returns for two jurisdictions
As US UK Tax Experts, we help freelancers, small businesses, and international companies manage US corporate tax in the UK, HMRC compliance, Form 5471 filings, GILTI, and UK corporation tax returns. Our cross-border specialists simplify dual tax compliance so you can stay compliant and focus on growth.
Why It’s Important to Have Specialist Corporate Tax Experts
Managing business tax across the US and UK is highly complex, with different reporting rules, deadlines, and entity structures. A general accountant may not fully understand how IRS corporate tax rules interact with HMRC requirements, leaving businesses exposed to double taxation, missed filings, or costly penalties.
By choosing specialist US & UK corporate tax accountants, you gain the expertise needed to handle Form 5471 compliance, GILTI tax, CFC reporting, and UK corporation tax returns seamlessly. Our dual-qualified team ensures filings in both jurisdictions are aligned, accurate, and on time.
Every freelancer, small business, or international company faces unique challenges when trading across borders. Dedicated specialists provide the specialist filing required to remain compliant, avoid double taxation, and keep pace as the business grows.
The numbers behind why this sits awkwardly between two systems.
How an engagement runs
Two authorities, one file. Here is what working together actually looks like.
- Review
We look at both sides together: what you file, where, and what has already been filed or missed.
- Position
We set out the treaty position and reliefs that apply to you, with the numbers behind each option.
- File
We prepare and submit to the IRS and HMRC, keeping the two sets of filings consistent with each other.
- Keep current
Two tax calendars means deadlines all year. We track them and tell you before they arrive.
What is included
The filings this service covers on both sides of the Atlantic.
Questions we are asked most
The ones that come up in almost every first conversation about this.
Through treaty relief and foreign tax credits claimed on each company's return. The relief exists, but it depends on documentation showing where the profit was earned, so the claim and the paperwork are the same job.
If you have entities in both countries transacting with each other, then in principle yes, even at modest scale. Some exemptions apply to smaller businesses, but the requirement to price dealings on arm's length terms does not disappear simply because the company is small.
You can potentially claim in each country for qualifying work done there, but not twice for the same expenditure, and the definitions of qualifying activity differ. Claiming well in one country often matters more than claiming thinly in both.
Withholding and treaty rates depend on the ownership percentage and the recipient. Getting this wrong is expensive but also very avoidable, since the rates are known in advance and the treaty paperwork can be filed before the payment is made.
Enough to show where decisions were made, where people worked, and how intra-group transactions were priced. Most disputes in this area turn on evidence rather than on interpretation, so contemporaneous records are worth more than reconstructed ones.
Let's get both sides right
Tell us your situation and we will map out exactly what you owe, where, and when.