Siddhartha H.

I'm Siddhartha, a qualified ICAEW member, agency owner of Mercurius Advisory Services (MASPARTNER), and a finance professional with over two decades of experience working with industry giants like Grant Thornton, PwC, and American Express.

At MAS, my team and I offer a full suite of financial services to clients across 30+ countries, including the USA, Canada, Australia, UK, Europe, Singapore, the Middle East, Africa, and India. Whether you need day-to-day bookkeeping, complex tax filings, or high-level CFO guidance, we've got it covered under one roof.

What makes us different? Every engagement benefit from my CFO-level oversight, which means your numbers don't just get recorded; they get interpreted and acted upon.

OUR CORE SERVICES

-Bookkeeping & Accounting
-Full-cycle bookkeeping and transaction recording
-Accounts Payable & Receivable management
-Bank and credit card reconciliation
-Inventory and stock management
-Financial and management reporting
-CFO & Strategic Finance Services
-Budgeting and financial forecasting
-Financial planning and analysis (FP&A)
-Analytical and strategic financial support
-Controllership and oversight services

White-Label Accounting & Tax Support for CPA Firms

Reliable back-office support for CPA and tax firms looking to manage overflow work, seasonal deadlines, and ongoing client needs. Support includes bookkeeping, reconciliations, AR/AP, payroll, workpapers, financial statement assistance, tax preparation support, 1099/W-2 processing, and sales tax filings, all completed under your firm’s brand and systems.

Tax Services

-Personal and corporate tax (US, UK, UAE, Australia & Canada)
-Sales tax registration and filings
-Company and personal tax preparation
-Payroll processing and compliance

Business Formation & Compliance

-Company registration (US, UK, Canada, UAE, Australia)
-ITIN/EIN services in the US
-Ongoing compliance management

COUNTRIES SERVED USA | Canada | Australia | UK | Europe | Singapore | Middle East | Africa | India | UAE |30+ Countries

Long-term relationships are something we genuinely value, and we work hard every day to deserve them through accurate, timely, and confidential service.