About SIGMA Accountants & Tax Agents

Professional Accounting & Taxation Services You Can Trust

SIGMA Accountants & Tax Agents is a Melbourne-based accounting and taxation practice committed to helping individuals, investors, and businesses achieve their financial goals through professional advice, personalised service, and practical solutions.

Founded by Registered Tax Agent Saumya Witharanage, SIGMA was established with a clear vision: to provide reliable, high-quality accounting and taxation services while building long-term relationships based on trust, integrity, and exceptional client service.

Today, we proudly support clients across Australia, providing tailored solutions for individuals, sole traders, partnerships, companies, trusts, self-managed superannuation funds, and growing businesses.

Saumya Witharanage

Principal Accountant | Registered Tax Agent | Founder – SIGMA Accountants & Tax Agents

"Helping Individuals, Investors & Businesses Achieve Better Financial Outcomes."

Saumya Witharanage is the Founder and Principal Accountant of SIGMA Accountants & Tax Agents, bringing over 20 years of accounting experience and more than 15 years of Australian taxation expertise.

As a Registered Tax Agent, she provides accounting, taxation, and business advisory services to individuals, investors, sole traders, companies, trusts, and SMSFs across Australia.

Known for her personalised approach and practical advice, Saumya helps clients navigate complex taxation matters with confidence while achieving better financial outcomes.

Qualifications & Memberships

Registered Tax Agent (Tax Practitioners Board)
Fellow Member of the Institute of Public Accountants (FIPA)
Fellow Member of The Tax Institute
ASIC Registered Agent
Xero Certified Advisor
B.Sc.Management (Special) Degree (USJP, Sri Lanka)

Our Mission

To provide professional accounting, taxation, and business advisory services that empower our clients to make informed financial decisions, remain compliant, and achieve long-term success.

Our Values

✔ Professionalism – Delivering services with integrity, accuracy, and ethical standards.

✔ Client Focus – Building strong relationships through personalised service and practical advice.

✔ Reliability – Providing timely, responsive, and dependable support.

✔ Continuous Improvement – Staying ahead of legislative and industry changes to better serve our clients.

Why Clients Choose SIGMA

✔ 20+ Years Accounting Experience

✔ 15+ Years Australian Taxation Experience

✔ Registered Tax Agent

✔ Fellow IPA Member

✔ Fellow Tax Institute Member

✔ ASIC Registered Agent

✔ Xero Certified Advisor

✔ Australia-Wide Service

Our Commitment

At SIGMA Accountants & Tax Agents, we are committed to building lasting relationships with our clients by delivering professional advice, practical solutions, and personalised support.

Whether you require assistance with a simple tax return or comprehensive business advisory services, our team is dedicated to helping you achieve better financial outcomes with confidence.

Ready to Work With Us?

Whether you are an individual, investor, sole trader, company, trust, or SMSF, our experienced team is here to help.

📞 Phone: 03 5996 1347

📱 Mobile: 0405 524 574

📧 Email: admin@sigmaaccountants.com.au

📍 PO Box 7161, Cranbourne VIC 3977

Contact SIGMA Accountants & Tax Agents today and discover how professional advice and personalised service can help you achieve your financial goals.

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