◉ Business Tax
C-Corporation returns
C-Corp compliance (Form 1120) for cross-border businesses, including state filings where relevant.
Overview
Why this filing matters
C-Corp compliance (Form 1120) for cross-border businesses, including state filings where relevant.
Note — C-Corp compliance for cross-border businesses.
◉ Who this is for
- •US C-Corps with UK operations
- •UK-owned US C-Corps
✓ What you get
- ✓Form 1120 preparation
- ✓State return coordination
- ✓Transfer-pricing review where applicable
At a glance
- Key forms
- 1120
- Category
- Business Tax
- Turnaround
- 2–3 weeks once documents are complete
- Filed by
- ACCA-qualified IRS Enrolled Agent
Our approach
Built for the cross-border edge cases.
Most US-UK filings fail the same way: a treaty position that wasn't disclosed, a foreign account that slipped under FBAR thresholds, a PFIC election filed in the wrong year, a carry-forward not tracked from one preparer to the next. The cost of any single one of those is rarely catastrophic on its own — it's the compounding over multiple filing seasons that quietly turns a clean tax life into a six-figure remediation project.
We start every engagement by looking at the edge cases first — the elections, the disclosures, the carry-forwards, the side-effects on next year's return — and only then turn to the routine line items. The result is a filing that reads cleanly to anyone who picks it up next: another preparer, the IRS, or a successor in your own business.
- Position memo on every meaningful election, with the reasoning written down for the next return
- Carry-forwards (FTC, capital losses, PFIC basis) tracked year-on-year so nothing expires unused
- Plain-English commentary on every position taken — the kind that makes a future audit a non-event

Our process
How we handle your filing
Four steps from first call to filed return. Fixed fee confirmed before any work begins.
01
Intake
30-minute scoping call. We confirm your situation, required filings, and send a tailored document list.
02
Review
We analyse your position, flag any cross-border risks, and confirm the scope and fee before any work starts.
03
Prepare
Draft returns and schedules are prepared with plain-English commentary on key positions for your review.
04
File
E-file with the IRS / FinCEN, send confirmations, and handle any follow-up notices or questions.
Pricing
Fixed fees — no surprises
C-Corp return (Form 1120): from £1,800 + VAT federal only. State returns, international schedules (foreign shareholders, controlled-group analysis, transfer pricing) are priced after scoping.
FAQs
Common questions
Related services
Others in Business Tax
LLC tax returns
Federal returns for single- and multi-member LLCs — reported on Schedule C or Form 1065 depending on structure and election.
Learn more →
Partnership returns (Form 1065, K-1)
US partnership returns including K-1s for each partner, with attention to international allocations.
Learn more →
S-Corporation returns
S-Corp filings (Form 1120-S) and shareholder K-1s — including cross-border shareholder considerations.
Learn more →
Ready to get this filed?
Tell us your situation and we’ll confirm scope, a fixed fee, and the documents we need — usually within one business day.