Vast experience is an important advantage for your business

Our experience and reputation in the market is a guarantee of high quality services, as well as a high level of expertise and mutually beneficial partnerships.

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Audit & Audit Related Services

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Business Support

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Financial and Management Consulting

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Legal Consulting

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Tax Consulting

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Services for Private Clients

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We have an extensive experience in preparing accounts and conducting audits according to international and Russian standards for companies in various industries: transportation (especially shipping), telecommunications, forestry, natural resources, construction, banking and finance, information technology, leasing, wholesale trade and many others.

Business support

Our experts will provide qualified assistance and support for your business.

Services to private clients

Bank accounts opening. Trusts. Dividend Tax.

What’s new?

Our News

Information about Mainstay LLC was entered into the register of audit organizations providing audit services to publicly important organizations.

On October 03, 2023, information about Mainstay LLC was entered into the register of audit organizations of the Federal Treasury, which contains a list of companies providing audit services to publicly important organizations.

The President of Russian Federation has signed Decree No. 844 dated November 8, 2023 "On Additional Temporary Measures of Economic Nature Related to the Circulation of Foreign Securities".

President Vladimir Putin has signed a decree which provides for additional temporary measures of an economic nature related to the circulation of foreign securities. According to the document, Russian investors are allowed to sell blocked "unfriendly" foreign securities to non-residents.

The IASB is developing a new standard on the presentation of financial statements

The IASB is currently developing a new standard on presentation of financial statements. In discussing the draft standard, the Board is considering requiring disclosure of the amounts included in each line item in the statement of profit or loss for depreciation, amortisation and employee benefits.

We'll help you discover and unlock your inner power


We work all over Russia

Room I, floor 6, building 2A, Odesskaya str, Moscow, 117638, Russia
Phone: +7 495 589 3498

Office 40, building 119A, Prospekt Mira, Yuzhno-Sakhalinsk, 693007, Russia
Phone: +7 424 231 1080


Floor 8, building 8, Lazo str, Vladivostok, 690091, Russia
Phone: +7 423 241 4554

We are members of the following professional communities:

Self-Regulated Organization of Auditors of the Commonwealth Association

Canadian Public Accountability Board (CPAB, Canada)
Public Company Accounting Oversight Board (PCAOB, USA)

Our сlients

Mainstay in numbers


years on the Russian market


types of services provided in Russia


industry sectors


of employees of the Russian audit have auditor certificates