Precision Ledger is a locally owned accounting firm based in Karratha, Western Australia. Our mission is to support and empower small businesses with accurate financial management, streamlined systems, and proactive practical advice. so they can focus on what they do best. Our services help businesses stay compliant, maintain reliable financial records and make informed decisions with confidence.
We are also a supervised representative of ISM Tax Associates and offers in-person and virtual income tax return preparation and lodgment services.
CPA
BAS Agent
Karratha Local
About Us
Mary Hanna
CPA and BAS Agent
Mary is the founder of Precision Ledger, providing accounting and bookkeeping services with a focus on clarity, accuracy and practical support for business owners.
Originally from the Philippines, Mary migrated to Australia in 2013 and has lived in Karratha since 2014. She holds a Bachelor’s Degree in Accounting, is a Certified Practising Accountant (CPA Australia), and a registered BAS Agent. She is also studying and working towards her registration as Tax agent and is a supervised representative of ISM Tax Associates.
Mary has developed extensive experience across both the public and private sectors, working in a variety of finance and accounting roles including:
Finance Manager – Blades and Shades Karratha (2025–present)
Senior Accountant – Northwest Accountancy (2023–2025)
Financial Accounting Officer – City of Karratha (2017–2022)
Finance Officer – St Luke’s College Karratha (2014–2017)
Accountant - Mercedes Benz Financial Services Philippines (2012-2014)
Accountant - Law Office of Lucenario and Associates Philippines (2010 - 2012)
More than an accountant, Mary is a trusted business partner who understands the challenges and ambitions of small business owners—and is committed to helping them succeed with confidence and clarity.
