Empowering you to move forward with confidence
Your Trusted Advisor in Türkiye and Beyond
Keystone Advisory provides best-in-class expertise to support internationally active businesses in Türkiye and the MENA region at every stage of growth, from startup to global expansion. Our services span Business Advisory, Tax & Advisory and Business Solutions, with a focus on helping growing businesses to optimise profits, enhance business value and internationalise.
As part of an integrated global network, we leverage shared insights, skills, and resources worldwide, guided by a client-centric approach and a deep understanding of each client's business.
Our expert insights
EXPERT INSIGHT
Managing Transfer Pricing Risk: Why Documentation Alone Is Not Enough
EXPERT INSIGHT
Set Up a Business Tax Portal Business Account Early for Top-up Tax Notification and Electronic Profits Tax Return Filing
EXPERT INSIGHT
Türkiye’s Proposed Enhanced Intra-Group Stamp Duty Relief
EXPERT INSIGHT
From Tariffs to Tax Strategy: Building Resilience in 2026
EXPERT INSIGHT
Türkiye’s New 468 Rule: What HR Needs to Know About Continuous Contract
Business Advisory
Transaction advisory, valuations, M&A, litigation support, and forensics & investigation to help you make confident decisions.
Tax & Advisory
Tax compliance, international tax advisory, and transfer pricing that optimise profits and keep you ahead of changing regulation.
Business Solutions
Corporate secretarial, accounting, and payroll services that streamline operations so you can focus on growth.
Why Keystone Advisory
We combine deep local knowledge in Türkiye and the MENA region with the reach of an integrated global network. Whether you are expanding across borders, planning a transaction, or navigating complex regulation, our teams work alongside you to deliver practical advice and measurable outcomes.
Our client-centric approach means we take time to understand your business, your ambitions and your constraints — so our recommendations are always relevant and actionable.
✓ Locally rooted, globally connected
✓ Sector-specific expertise
✓ Responsive, partner-led service
✓ Practical, outcome-focused advice
Countries
We have firms in 120 countries, with a presence in each of the top 40 major business centres throughout the world.
People
We have combined staff of over 56,000.
Offices
We have over 500 offices across the Americas, Europe, Middle East, Africa (EMEA) and Asia Pacific.
Ready to move forward?
Talk to our team about how Keystone Advisory can support your next step.