Ascen Tax USA
Federal, state and cross-border tax filing for businesses and individuals.
Visit ascentaxus.comAscendum Corporate Advisory LLC
One firm for your business, across borders.
US · UK · Canada · India · UAE · Singapore · Australia — tax, compliance, payroll and corporate advisory under one roof.
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Accountable team
Who we help
Built for businesses that do not fit in one country.
If any of these sound like your situation, we already know the filings, the deadlines and the order they come in.
Businesses expanding internationally
Companies opening a first entity abroad and needing the tax, payroll and compliance to follow them in.
Foreign companies entering the US
Groups setting up a US subsidiary, hiring stateside or bringing a product to market and needing federal and state filings from day one.
Multi-country groups
Owners running entities across two or more countries who want one file, one calendar and one accountable team.
Individuals with cross-border tax needs
Expatriates, NRIs, dual residents and investors with income, assets or filing duties in more than one country.
Founders incorporating across borders
First-time founders and serial operators choosing an entity, a holding structure and a tax position before they incorporate.
Owner-managed groups restructuring
Businesses preparing for sale, a funding round or succession and needing the structure to hold up under diligence.
Where we file
Seven countries, one engagement.
Registration, filing and payroll are handled in each jurisdiction by the same firm, on a single calendar.
United States
Federal, state, payroll and sales tax
United Kingdom
Corporation tax, VAT and PAYE
Canada
T2, T1, GST/HST and payroll
India
Income tax, TDS, GST and FEMA
United Arab Emirates
Corporate tax, VAT and substance
Singapore
Form C-S, GST and CPF payroll
Australia
Company tax, GST/BAS and STP payroll
The Ascendum family
Four focused practices, one accountable firm.
Each division runs its own platform and its own specialists. The engagement, the file and the responsibility stay with Ascendum.
Services
What we do
Compliance and advisory in the seven jurisdictions where our clients operate, plus the payroll and corporate work that surrounds them.
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International Taxation
Structuring and compliance for businesses and people who cross borders, from treaty positions to foreign tax credits.
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Transfer Pricing
Arm's-length pricing studies, documentation and defence for groups trading across borders, built on the OECD guidelines and local rules.
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IP & Transaction Advisory
Structuring the ownership, licensing and migration of intellectual property so royalty flows are defensible and tax-efficient.
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OECD/UN Model & Treaty Advisory
Treaty interpretation, residency and permanent establishment analysis using the OECD and UN model conventions.
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Why Ascendum
Built for businesses that do not fit in one country.
Cross-border expertise
We practise in seven countries across three continents. A treaty position taken in one country is tested against the return filed in the other.
One point of accountability
One engagement partner owns the whole file. There is no handoff between unconnected firms and no gap where a filing goes missing.
Practitioner-led
Chartered accountants and enrolled practitioners lead the work and appear before the authorities. Reviews are not delegated to preparers.
Technology-first delivery
Bookkeeping, document collection and filing calendars run on AscenAi, so the numbers behind a return are current rather than reconstructed.
“We had three advisers in three countries giving us three answers. Ascendum gave us one position and filed it consistently.”
Talk to someone who files in all four countries.
A short call is usually enough to tell you what the position is and what it will cost to keep it compliant.