Miller, Cooper & Co., Ltd.

What Miller, Cooper & Co., Ltd. does

Miller, Cooper & Co., Ltd. is a privately held CPA firm founded in 1919 and headquartered in Deerfield, Illinois, in the Chicago metropolitan area. The firm provides accounting, tax, advisory, technology/managed services, benefit plan consulting, and business valuation services to middle market and entrepreneurial companies, with industry specialization across construction, dealerships/automotive, healthcare/biotech/pharma, high net worth/family office, manufacturing/distribution, nonprofit, private equity/venture capital, professional services, real estate, technology, and government/school districts. Its core service lines include audit, review, and compilation; tax planning and structuring (including international, state and local, and estate/succession); specialty tax credits (R&D, Section 179D, Section 45L, cost segregation, repair and maintenance studies); transaction advisory and HR due diligence; forensics and litigation support; business valuation; client recruiting; and outsourced human resources. The firm is the 10th largest accounting firm in the Chicago area per Crain's Chicago Business and was ranked #51 on the 2026 IPA Top 100 Firms list.

Miller Cooper monetizes through professional services engagements billed on a per-engagement, hourly, or retainer basis, depending on scope and complexity. The go-to-market is relationship-driven and sales-led, with one of the lowest principal-to-staff ratios in public accounting, meaning principals are directly engaged with clients across service lines. The firm operates an industry-vertical segmentation model with deep specialization across roughly a dozen sectors. Client-facing technology consists of a Thomson Reuters-powered client portal for document submission and access, Apxium for invoice payment processing, Paycom for recruitment, and WP Statistics for website analytics. The firm is an independent member of HLB International, a global network of 40,000+ professionals across 157 countries with worldwide revenue exceeding $5.96 billion, which enables cross-border engagements. Pricing is not publicly disclosed and varies by engagement.

Name

Miller, Cooper & Co., Ltd.

Legal name

Miller Cooper & Co., Ltd.

Website

https://millercooper.com

Company type

Private

Founded year

1919

Operating status

Operating

Headcount range

251–500 employees

Short description

Miller, Cooper & Co., Ltd. is a 105-year-old, privately held CPA firm headquartered in Deerfield, Illinois, providing accounting, tax, advisory, managed IT, and business valuation services to middle market and entrepreneurial companies across roughly a dozen industry verticals, and is ranked among the top 100 U.S. accounting firms.

Ownership category

akta.pro rank

Product category

Accounting and Advisory Services

NAICS

Offices of Certified Public Accountants (541211)

akta.pro primary industry

Financial Reporting & Technical Accounting Advisory (GAAP/IFRS) (BPAHABAF)

akta.pro secondary industry

Outsourced Finance & CFO Services (BPAHABAE)

Keywords

• Audit and accounting services
• Tax advisory services
• Transaction advisory
• Business consulting
• Benefit plan consulting

Headquarters

HQ city

Deerfield

HQ country

United States

HQ region

North America

Offices1 record

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 Accounting Services: Audit, review and compilation services; employee benefit plan audits; accounting/bookkeeping outsourcing services
2. Tax Services: Tax planning, strategy and structuring; state and local tax; international tax; estate/succession/wealth planning; project finance tax credit and incentive solutions
3. Advisory and Business Support Services: Transaction advisory services; buy/sell HR due diligence; forensics/litigation support/bankruptcy; client recruiting services; outsourced human resources services
4. Specialty Tax Solutions: Repair and maintenance studies; cost segregation; R&D tax credits; Section 179D tax deductions; Section 45L tax credits
5. Business Valuation: Business valuation services for succession planning, M&A, and other purposes
6. Technology and Managed Services: Technology solutions and managed IT services
7. Benefit Plan Consulting: Benefit plan consulting and administration services

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Miller, Cooper & Co., Ltd. is a professional services CPA firm providing audit, accounting, tax, advisory, IT/managed technology, benefit plan consulting, and business consulting services to middle-market and entrepreneurial companies as well as nonprofit organizations. The firm serves clients through principal-led engagements and a Thomson Reuters-powered client portal for document submission and information access.

Product overview

Miller Cooper provides a comprehensive suite of professional accounting, tax, and consulting services delivered through an integrated offering. The core services include Audit and Accounting Services (audit, review, compilation, employee benefit plan audits), Tax Services (planning, strategy, state/local, international, estate/wealth planning), Advisory and Business Support Services (transaction advisory, HR due diligence, forensics/litigation, recruiting, outsourced HR), Specialty Tax Solutions (R&D credits, cost segregation, Section 179D/45L credits), Business Valuation, Data & Analytics Advisory Services, Technology Solutions/Managed Services, and Benefit Plan Consulting/Administration. Clients access services through the Thomson Reuters-powered Client Portal, which serves as the central platform for document submission, financial information access, and client interactions.

Differentiator

Problem solved

Functional benefit

Products and services

• Audit and Accounting Services Audit, review, compilation, and employee benefit plan audit services for middle-market and entrepreneurial companies.
• Tax Services Tax planning, strategy and structuring, state and local tax, international tax, and estate/succession/wealth planning services.
• Advisory and Business Support Services Transaction advisory, buy/sell HR due diligence, forensics/litigation support/bankruptcy, client recruiting services, and outsourced human resources services.
• Specialty Tax Solutions Repair and maintenance studies, cost segregation, R&D tax credits, Section 179D tax deductions, and Section 45L tax credit services.
• Business Valuation Professional business valuation services for succession planning, transactions, and financial reporting.
• Data and Analytics Advisory Services Advisory services focused on data analytics and AI for business insights and decision support.
• Technology Solutions and Managed Services IT solutions and managed technology services for clients.
• Benefit Plan Consulting and Administration Retirement plan and benefit plan consulting and administration services.

Segments12 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature2 records

Partnerships

One partnership is on record.

• HLB InternationalcoreStrategic or Co-development PartnerMiller Cooper is an independent member of HLB International, a global network of advisory and accounting firms. This affiliation enables cross-border tax, consulting, and accounting/audit collaboration with highly experienced industry experts throughout North America and worldwide. HLB comprises 40,000+ professionals in 1,069 offices across 157 countries with worldwide revenue exceeding US $5.96 billion.

Scale indicators5 records

Recent moves1 record

Expansion highlights5 records

Direct peers

• Sikich LLP: Chicago-based accounting, advisory, and technology services firm serving middle-market clients with a similar audit/tax/managed IT/outsourced services model. Geographic and product-line overlap is direct.
• Baker Tilly US: Top-10 US accounting and advisory firm headquartered in Chicago. Closely comparable in size, full-service audit/tax/advisory mix, and middle-market focus, with overlap in industry verticals including construction, real estate, and PE.
• Eide Bailly LLP: Top-25 US CPA firm with similar middle-market, multi-vertical specialization (construction, dealerships, healthcare, nonprofit). Comparable size tier and IPA Top 100 ranking cohort.
• Cherry Bekaert: Top-25 US accounting and advisory firm with similar middle-market positioning and industry specializations (construction, real estate, government, healthcare). Comparable size tier within the IPA Top 100 cohort.
• Plante Moran: Largest US-based CPA firm by headcount with Midwest roots and full-service audit, tax, and consulting for middle-market companies. Closely comparable on multi-vertical specialization, mid-market GTM, and accounting-plus-advisory service breadth.
• Wipfli LLP: Top-20 US accounting firm with Midwest origins, serving middle-market and closely-held businesses across audit, tax, and advisory. Comparable size tier, industry-vertical approach, and PE-portfolio focus.
• Crowe LLP: Major US accounting firm headquartered in Chicago with comparable headcount and a strong audit, tax, and advisory practice serving middle-market and PE-backed clients. Directly competes for talent and clients in the same Chicago talent pool.

Broad incumbents

• RSM US: US member of RSM global network, headquartered in Chicago, with leading middle-market audit and consulting franchise. Larger scale and broader geographic footprint make it a frequent competitor on larger middle-market engagements.
• BDO USA: US arm of global mid-tier BDO network, headquartered in Chicago. Larger and broader portfolio across audit, tax, and advisory; competes for the same middle-market and PE-backed clients but at a different scale tier.
• Grant Thornton: US audit, tax, and advisory firm and member of Grant Thornton International. Significantly larger than Miller Cooper with national reach; competes directly for middle-market clients seeking broader capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/millercoopercpa
• Facebookfacebook.com/millercoopercpa
• LinkedInlinkedin.com/company/miller-cooper-&-co.-ltd.
• Instagraminstagram.com/millercoopercpa

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Miller, Cooper & Co., Ltd.