MGO (Macias Gini & O'Connell LLP)

What MGO (Macias Gini & O'Connell LLP) does

MGO (Macias Gini & O'Connell LLP) is a privately held, California-domiciled accounting and advisory firm founded in 1987 that operates as a Top-100 US CPA practice with 500+ professionals across 13 offices in California, Texas, Georgia, Illinois, New York, and India. The firm delivers four core service lines — Audit and Assurance, Tax Services (including specialty credits such as R&D, ERC, WOTC, and energy credits), Consulting (cybersecurity, transaction advisory, M&A sell-side, valuation, internal audit, and management consulting), and Managed Services — alongside Private Client Services for high-net-worth individuals. MGO maintains industry-specialized practices in cannabis, biotech and life sciences, entertainment/sports/media (including professional athletes), state and local government, manufacturing and distribution, real estate, nonprofit, and other verticals.

The firm is not a technology company: its platform is a partner-led professional services delivery model augmented by an interactive Cost Segregation Assessment Tool and supported by a dedicated Chief Data Officer and Chief Information Security Officer function. Its primary distribution and capability advantage comes from membership in the BDO Alliance, which provides access to global methodologies and cross-border referral network while MGO retains independent branding and partner economics. Customer acquisition is sales-led and relationship-driven, targeting entrepreneurs, public and private sector executives, HNW individuals, and specialized industry clients, with revenue generated through engagement-based professional services billing across audit, tax, advisory, and managed services workstreams.

The firm has pursued an active inorganic growth strategy, completing acquisitions of Schwartz & Company (2019) and Hall & Company (2021) to add tax controversy expertise and broaden capacity. India offices in Gurgaon and Bengaluru provide offshore delivery support, while the firm has institutionalized its leadership with national practice leaders across tax, assurance, innovation, data, quality, risk/legal, people, and information security. No AI/ML, software, or proprietary technology platform is disclosed in the source material, and financial revenue figures are not publicly available, consistent with a partnership-structured professional services firm.

Name

MGO (Macias Gini & O'Connell LLP)

Legal name

Macias Gini & O'Connell LLP

Website

https://mgocpa.com

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

501–1,000 employees

Short description

MGO is a privately held US accounting and advisory firm with 500+ professionals offering audit, tax, consulting, and private client services across 13 offices in the US and India, serving entrepreneurs, public/private sector leaders, HNW individuals, and specialized industries including cannabis, biotech, entertainment, government, manufacturing, and real estate.

Ownership category

akta.pro rank

Product category

Accounting and Professional Services

NAICS

Management Consulting Services (54161)

SIC

Services-Engineering, Accounting, Research, Management (8700), Services-Management Consulting Services (8742)

akta.pro primary industry

Tax Operations Support (Indirect Tax, Withholding, Compliance Admin) (BPAAAGAI)

akta.pro secondary industry

Program & Project Management (PMO) Consulting (BPAHACAL)

Keywords

• Audit and assurance
• Tax advisory
• Business consulting
• M&A transaction advisory
• Private client services

Headquarters

HQ city

Sacramento

HQ country

United States

HQ region

North America

Offices13 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Audit and Assurance Services: Professional audit and assurance services for public companies, private companies, government entities, and employee benefit plans.
2. Tax Services: Comprehensive tax services including enterprise business tax, closely held companies, international tax, private client services, state and local tax, tax advocacy and resolution, and tax credits and incentives.
3. Consulting Services: Consulting offerings including client accounting solutions, cybersecurity, fraud and litigation support, internal audit, M&A sell-side advisory, management consulting, technical accounting, transaction advisory, and valuation services.
4. Managed Services: Outsourcing and managed services for client accounting needs.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

MGO (Macias Gini & O'Connell LLP) is a professional services firm delivering audit and assurance, tax planning and compliance, management consulting, and private client services to public and private companies, government entities, and high-net-worth individuals. It operates industry-specialized practices across sectors such as cannabis, biotech and life sciences, real estate, manufacturing, entertainment, financial services, and state and local government, supported by its membership in the BDO Alliance.

Product overview

MGO (Macias Gini & O'Connell LLP) is a professional services firm offering a comprehensive suite of tax, audit, consulting, and private client services. The firm operates as a unified service model rather than a software platform, providing Audit and Assurance, Tax Services (including specialized credits like R&D Tax Credits, Employee Retention Credit, Work Opportunity Tax Credit), Consulting services (spanning cybersecurity, M&A advisory, valuation, and more), Managed Services, and Private Client Services. Industry-specific expertise covers sectors including Cannabis, Biotech and Life Sciences, Technology, Real Estate, Entertainment/Sports/Media, Manufacturing, and more. MGO also provides interactive tools such as a Cost Segregation Assessment Tool. The firm is part of the BDO Alliance, a global network of professional services firms.

Differentiator

Problem solved

Functional benefit

Products and services

• Audit and Assurance

Quantifiable outcome

• $1.5-1.6 million in tax savings on $10 million commercial property through cost segregation study
• +2 more outcomes

Named customers6 records

Segments9 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• BDO USA, P.C.coreStrategic or Co-development PartnerMGO is a member of the BDO Alliance, providing access to global resources, methodologies, and a network of professionals while maintaining independent boutique firm positioning. The partnership enables MGO to serve clients with international needs while preserving personalized client service.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Armanino LLP: Large California-based CPA and business advisory firm of comparable scale (~500-1000+ professionals), offering audit, tax, consulting, and outsourced accounting with similar industry specialization — the closest direct competitor in MGO's home market.
• Moss Adams LLP: Top-15 US CPA firm headquartered in the Pacific Northwest with comparable headcount and a similar mix of audit, tax, consulting, and industry-specialized services including cannabis, healthcare, and manufacturing verticals.
• Eide Bailly LLP: Top-25 US accounting firm with comparable size and multi-state footprint, offering audit, tax, and consulting services across industries — comparable mid-tier alternative for clients seeking non-Big-Four service.
• CliftonLarsonAllen (CLA): Top-10 US accounting and professional services firm with similar service breadth (audit, tax, consulting, wealth advisory) and comparable industry specialization, competing directly for mid-market and closely-held clients.
• Withum: Top-30 US CPA and advisory firm with comparable size and a similar entrepreneurial mid-market client focus across audit, tax, and advisory services.
• Plante Moran: Top-15 US accounting firm with comparable headcount, broad service lines, and similar emphasis on closely-held businesses, manufacturing, and industry-specialized advisory.
• FORVIS (formerly Dixon Hughes Goodman): Top-10 US accounting firm formed through merger of DHG and BKD, offering comparable audit, tax, and consulting services with similar mid-market and industry-specialized client focus.
• Cherry Bekaert: Top-25 US accounting firm with comparable size, multi-state presence, and similar service mix including tax credits, government, and industry-specialized advisory.
• Marcum LLP: Top-15 US accounting and advisory firm with comparable size and similar emphasis on closely-held businesses, real estate, cannabis, and other industry verticals where MGO competes.

Broad incumbents

• BDO USA: Top-5 US accounting firm and MGO's BDO Alliance partner — provides global reach that complements MGO while also competing for the same large mid-market and international engagements.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/mgocpa
• LinkedInlinkedin.com/company/macias-gini-&-o'connell-llp-mgo-
• Instagraminstagram.com/MGO_and_you
• Xx.com/mgocpa

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A2 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about MGO (Macias Gini & O'Connell LLP)