
Jaipur chartered accountancy practice handling GST, income tax, audit and business registration for firms and individuals
Mumbai chartered accountants established in 1897, offering audit, tax and advisory services mainly to large corporates

Chartered accountants in Mumbai, K. S. Aiyar & Co. says it is the oldest accounting firm in India, tracing its start to Calicut in 1897 and its move to Mumbai in 1900. The firm is an independent member of LEA Global, and its clients are mainly large corporates that need audit, tax and advisory work across the country.
Audit engagements include statutory and VAT work. Reviews ahead of an acquisition, along with investigations, sit within the audit and assurance practice, which the firm describes as a comprehensive professional service for large companies. Its assurance work is carried out on the basis of independence and professional standards.
The taxation practice gives consultancy and advice on direct tax and covers indirect taxation, including VAT. Transfer pricing and tax audit work are listed alongside the advisory work, so a company's domestic and cross-border tax questions can be handled by the same team.
Advisory services include governance and risk management, business advice, corporate restructuring, corporate recovery, mergers and acquisitions, and valuation. The firm presents these as the means by which clients keep a business on course through periods of change.
For international investors, the firm offers regulatory consulting, including advice on foreign exchange rules. It also provides legal and secretarial services, US GAAP restatement and general accounting support, and it lists personnel recruitment and management consulting among its other work.
The firm supports community work. Its foundation is a joint venture with a US counterpart that connects sponsors with rural village children living below the poverty line, and it supports education for underprivileged children and skills training for villagers. Its premises include a gallery that displays and sells work by local and emerging artists, with the sales supporting the firm's charitable activities.
The head office is in Mumbai, with offices in Hyderabad and Chennai. The firm describes its approach with the phrase assurance across three centuries, meaning a practice carried forward from the nineteenth century, and it says its values have not changed with the times.
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.
Summary written by TrustList from the business's own published information, Nov 2026.
K. S. Aiyar & Co. is ranked on 6 TrustList rankings: #2 on 1, #4 on 1, #6 on 1, #9 on 1, #10 on 1 and #17 on 1.
Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. K. S. Aiyar & Co. has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.
It is the only one of the 23 here listing education and not for profit.
Its profile: “Chartered accountants in Mumbai, K.”
Of the 23 here, 11 also cover tax and 9 also cover accounting; 3 also work in Pune and 3 also work in Ahmedabad.
Behind Dhirubhai Shah & Co LLP, ahead of Engineer & Mehta.
It is one of 2 here listing personnel and progressive.
Its profile: “Its foundation is a joint venture with a US counterpart that connects sponsors with rural village children living below the poverty line, and it supports education for underprivileged children and skills training for villagers.”
Of the 53 here, 18 also cover non profit and 18 also cover government; 5 also work in United States and 5 also work in California.
Behind Arkansas Foundation, ahead of Heveron & Company CPAs.
It is one of 3 here listing rendering and one of 44 here listing accounting.
Its profile: “It also provides legal and secretarial services, US GAAP restatement and general accounting support, and it lists personnel recruitment and management consulting among its other work.”
Of the top 84 here, 14 also cover insurance and 14 also cover reporting; 3 also work in Dubai and 3 also work in Pennsylvania.
Behind Informes Contables.
It is one of 17 here listing legal and one of 50 here listing tax.
Its profile: “says it is the oldest accounting firm in India, tracing its start to Calicut in 1897 and its move to Mumbai in 1900.”
Of the top 85 here, 18 also cover auditing and 17 also cover legal; 12 also work in Delhi and 7 also work in Mumbai.
Behind D.P. Shewale & Co., ahead of KK Thampan & Co..
It is the only one of the 13 here listing not for profit and progressive.
Its profile: “It also provides legal and secretarial services, US GAAP restatement and general accounting support, and it lists personnel recruitment and management consulting among its other work.”
Of the 13 here, 10 also cover partners and 8 also cover medical; 2 also work in New Delhi and 2 also work in Texas.
Behind Ilaka Solutions LLC, ahead of Lisa L. McDonall CPA.
It is the only one of the 24 here listing progressive and one of 3 here listing education.
Of the 24 here, 4 also cover internet; 2 also work in Chennai and 2 also work in Hyderabad.
Behind JVR & Associates, ahead of Khan Akber & Co. Chartered Accountants.
As of 2026-11-15. Organic ranks only; sponsored placements are never ranks. How TrustList ranks
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