International tax
Applying tax treaties, permanent establishment, withholding taxes, double taxation.
OECD Model · UN Model · CEMAC
Libreville · Yaoundé · CEMAC region
Steve ArnoldTchemowo
At your service
CEMAC Certified Tax Adviser, Managing Partner of HELEOS Expertises Gabon and lecturer in international taxation. I advise companies and groups on international and extractive-sector tax matters.
International tax • Transfer pricing • Oil & Mining
No. 558
Licence
CEMAC
CEMAC
No. 558
CEMAC Certified Tax Adviser
No. 26315
Cameroon Order of Tax Advisers
No. 373953
Institute of Public Accountants
4 countries
Cameroon · Chad · CAR · Gabon
ApplicationsFinancial statements and budget trackingReady-to-use tools, downloadable after payment.Visit the shop →
TrainingTransfer pricing, PSCs, IFRS, tax treatiesLive online or in person for your teams.See the courses →
Articles and papersMinimum tax, PPPs, oil, free zonesFour recent analyses (in French), with summary and PDF.Read the publications →
Tax news
What has just changed
Finance acts, circulars, tax authority announcements, rulings and international standards: the key points and my view, as they happen.
Expertise
Areas of practice
Hands-on practice in the CEMAC and OHADA region since 2017, grounded in OECD and United Nations standards.
Transfer pricing
Functional analysis, choice of method, comparability studies and documentation.
Art. 9 OECD Model · OECD Guidelines
Country-by-country reporting
Preparing and reviewing country-by-country reports for multinational groups.
BEPS Action 13 · CbCR
Oil taxation
Audit and analysis of oil contracts, drafting proposals, production sharing contracts with the State.
PSC · Cost oil / Profit oil
Mining taxation
Mining tax regimes, establishment agreements, taxation of mining and oil services.
CEMAC mining codes
IFRS and financial statements
Preparing financial statements and annual accounts, tax reviews, SYSCOHADA / IFRS conversion.
IFRS · revised SYSCOHADA
In the field, in figures
30+training seminars delivered in Cameroon and Gabon
100+businesses, mostly SMEs, supported through incorporation in Cameroon and Gabon
100+business owners advised in Cameroon, Gabon and Chad
4countries where the firm practises (Cameroon, Chad, CAR, Gabon), with taxpayers supported as far as Canada
Publications
Articles and papers
My analyses are published in French, their original language. Your browser can translate them automatically.
Testimonials
What clients say
Feedback from clients, course participants and partners, published with their consent.
Training
Learn from a practitioner
Live online sessions, or in person for teams.
Transfer pricing in the CEMAC region
From functional analysis to documentation: methods, comparables and tax audits.
Price on requestRegister
Taxation of production sharing contracts
Reading a PSC, cost oil / profit oil split, key tax issues.
Price on requestRegister
Tax treaties and the OECD Model
Reading and applying a treaty: residence, permanent establishment, withholding taxes.
Price on requestRegister
IFRS for OHADA practitioners
The key standards explained by a bachelor's and master's lecturer, with case studies.
Price on requestRegister
Online courses & analyses
Learn wherever you are
Short courses, finance act analyses, news commentary and expert opinions. Once payment is confirmed, you receive the material (PDF, video or course access) by e-mail or WhatsApp.
How to pay? Payment by Mobile Money after confirmation by e-mail. Terms of sale (in French).
Consultation
Book a consultation
Choose the option that suits you, then contact me on WhatsApp or by e-mail to set the time. How to pay?
Focused question
30 minOne specific point: a return, a withholding, an ongoing audit.
Price on requestChoose a timeIn-depth consultation
1 hReview of a file with documents sent in advance and a written summary.
Price on requestChoose a timeAt the office
LibrevilleIn-person meeting for matters that need a full discussion.
Price on requestBook a meetingEngagements & audit
Request a proposal
For companies, groups and organisations that need a structured engagement. Reply within 2 working days.
- Tax audit and review of oil and mining contracts
- Transfer pricing policy and documentation
- Country-by-country reporting and international compliance
- Tax review and support during tax audits
- Financial statements, SYSCOHADA and IFRS
Shop
Tools for practitioners
The applications I already use with clients, available for download after payment. How to pay?
Preview coming soon
Tax-authority format built in
Financial statements builder
A complete application that produces your SYSCOHADA financial statements directly in the tax authority format: e-Tax in Gabon, Fiscalis in Cameroon.
- Standard system and simplified cash-based system
- Gabon and Cameroon
- Financial statements in French and English
- Word and PDF export
Standard systemPrice on request
Simplified cash-based systemPrice on request
Preview coming soon
Budget tracking
Budget, actuals and variances, month by month, ready to present to management.
Price on requestOrder
Payment
Pay by Mobile Money
For an application, a course or a consultation, in Gabon and in Cameroon.
Before any payment, ask for confirmation by e-mail. Payment numbers may change: wait for my reply confirming the number and the amount before sending any money.
Ask for confirmation
- Ask for confirmationBy e-mail, stating what you would like to buy.
- Pay the confirmed amountTo the number given in my reply, in the name of Steve Arnold Tchemowo.
- Send the proofA screenshot of the receipt on WhatsApp. I then deliver the application or confirm your appointment.
Moov Money · Gabon+241 060 07 64 30
Airtel Money · Gabon+241 077 04 26 90
Orange Money · Cameroun+237 655 85 34 40
Account holder: Steve Arnold Tchemowo. Online card payment will be available soon.
About
Certified tax adviser and managing partner of an accounting firm operating in Cameroon, Chad, the Central African Republic and Gabon. I teach international taxation and IFRS at bachelor's and master's level.
2026
CEMAC Certified Tax Adviser No. 558
Followed by registration with the Cameroon Order of Tax Advisers, No. 26315.
2024 →
Managing Partner, HELEOS Expertises Gabon
Running the country operation, tax monitoring of the client portfolio, tax reviews.
2023 →
Lecturer, IMSAG Libreville
International taxation and IFRS, bachelor's and master's level.
2020 – 2025
Trainee tax adviser, Yaoundé
Supervising a team of ten, tax returns, payroll and financial statements.
2019 →
Co-founder, Mon Fiscaliste SARL
Advisory, training seminars, incorporation of more than 20 companies.
2019
Master's degree in applied taxation, University of Dschang
After a first-year master's in Accounting & Finance and a bachelor's in Accounting, Control and Audit.
Mon FiscalisteOrganisation · Advisory · Company formationHELEOS Expertises GabonChartered accounting and statutory audit