Clark Nuber

What Clark Nuber does

Clark Nuber PS is a privately held CPA and consulting firm headquartered in Bellevue, Washington, founded approximately 1950, providing accounting, tax, advisory, and audit services to clients across the United States and internationally. The firm operates through four primary service lines: Audit & Assurance (including Single Audits, HUD audits, and employee benefit plan audits), Tax Services (federal, state, local, multistate, international compliance, and wealth transfer planning), Advisory Services (M&A support, fraud and forensics, IT services, family business consulting, and outsourced accounting), and Software Solutions & Training. Client-facing digital infrastructure includes a Client Portal powered by Smartsheet for secure document collaboration and an online payment system via Aiwyn.

The firm operates a single-office model from its Bellevue headquarters, serving three primary customer segments: not-for-profit organizations and government entities (the primary segment), privately held businesses and family enterprises, and high net worth individuals. A separately branded subsidiary, CN Wealth Management, provides registered investment advisory services. The firm holds B Corp certification and ranks No. 86 on INSIDE Public Accounting's 2026 IPA 500 list of the largest US accounting firms, a position it has maintained for nine consecutive years.

Clark Nuber's revenue model is based on professional services fees structured per engagement, with new client acquisition driven by direct engagement and an RFP process. The firm employs between 251 and 500 professionals, including shareholders, principals, and senior managers with credentials including CPA, CMA, CFE, CIA, and JD/LLM in Taxation. Notable visible engagements include a forensic evaluation for the King County Regional Homelessness Authority that identified $8 million in accounting gaps, and tax services for The Hotel Group in the hospitality industry. The firm differentiates through sector specialization in not-for-profit compliance, senior living, healthcare, and Washington state tax law rather than through technology or scale advantages.

Name

Clark Nuber

Legal name

Clark Nuber, PS

Website

https://clarknuber.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

251–500 employees

Short description

Clark Nuber PS is a Bellevue, Washington-based CPA firm providing audit, tax, advisory, and software consulting services to not-for-profits, private businesses, and high net worth individuals across the US. Ranked No. 86 on IPA's 2026 Top 500 with 70+ years of operating history.

Ownership category

akta.pro rank

Headquarters

HQ city

Bellevue

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Audit & Assurance Services: Audit, review, examination and compilation services for not-for-profit organizations, healthcare entities, private companies, and government contractors including Single Audits and HUD compliance audits.
2. Tax Services: Tax compliance, planning, and controversy services including federal, state and local tax, international compliance, and wealth transfer/estate planning.
3. Advisory Services: Consulting services including merger and acquisition support, fraud and forensics, IT services, family business consulting, and operational reviews.
4. Software Solutions & Training: Technology consulting and training services for accounting software solutions.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Clark Nuber is a CPA-led professional services firm providing audit and assurance, tax, and advisory services to privately held companies, family businesses, not-for-profits, government entities, and high-net-worth individuals. Its services include specialized audits, tax compliance and planning, fraud and forensics, M&A support, outsourced accounting, software consulting, and training, with CN Wealth Management offered as a separate investment-advisory brand.

Product overview

Clark Nuber PS is a CPA firm providing accounting and consulting services through four primary service lines: Advisory Services (including business consulting, IT services, M&A, and software solutions), Tax Services (state/local/multistate tax, international tax, IRS controversy), and Audit & Assurance Services (financial audits, Single Audits, retirement plan audits). The firm also operates CN Wealth Management as a separate registered investment advisory brand. Client-facing digital tools include a secure Client Portal powered by Smartsheet for document collaboration, and an online payment system via Aiwyn. Services are delivered to clients across diverse industries including not-for-profits, government entities, high net worth individuals, private businesses, healthcare, senior living, real estate, and technology sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Advisory Services Strategic consulting services for businesses, family businesses, and organizations, covering business advisory, fraud and forensics, IT services, mergers and acquisitions, outsourced accounting and bookkeeping, quality-of-earnings reports, and software solutions and training.
• Tax Services Tax planning, compliance, and consulting services covering state, local, and multistate tax; international compliance and consulting; IRS audits and controversies; general tax compliance and planning; and wealth transfer and estate planning.
• Audit & Assurance Services Audit, review, examination, and compilation services for organizations and companies, including Single Audits, HUD audits, employee benefit plan audits, retirement plan audits, and federal grant and contract consulting.
• Software Solutions and Training Technology consulting and training services for accounting software solutions, provided to businesses and organizations using accounting software.
• CN Wealth Management Investment advisory services offered as a separate brand and registered with the Securities Division of the Washington State Department of Financial Institutions.

Quantifiable outcome

• Improved IPA ranking from No. 88 to No. 86 in 2026
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Market position

Weaknesses4 records

Competitive moat5 records

Customer concentration

• LinkedInlinkedin.com/company/clark-nuber
• Xx.com/ClarkNuber
• Facebookfacebook.com/clarknuberps

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles20 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 Clark Nuber