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Accounting Firm

K. S. Aiyar & Co.

Mumbai chartered accountants established in 1897, offering audit, tax and advisory services mainly to large corporates

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About K. S. Aiyar & Co.

K. S. Aiyar & Co. is a Mumbai firm of chartered accountants that describes itself as the oldest accounting firm in India. Kalyan Subramani Aiyar started it in Calicut in 1897 and moved it to Mumbai, then Bombay, in 1900. Its clients are mostly large companies.

What K. S. Aiyar & Co. offers

  • Audit and assurance — statutory and VAT audits, due diligence reviews and investigations.
  • Taxation — direct and indirect tax advice, transfer pricing and tax audit.
  • Advisory — governance and risk management, corporate restructuring, recovery and mergers, and valuation.
  • Regulatory and legal support — foreign exchange consulting, secretarial work and services for international investors.
  • Other services — US GAAP restatement, accounting support, recruitment help and advice to non-profit organisations.

Key facts

  • Founded: 1897, in Calicut
  • Based in: Mumbai, India
  • Network: independent member of LEA Global
  • Community work: supports education for children and local artists, through a foundation and a gallery at its premises

Profile written by TrustList from the business's own published information, Oct 2026.

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Rankings

As of 2026-10-05. Organic ranks only; sponsored placements are never ranks.

What the business tells TrustList

Founded
1897 (129 years) evidence sent

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