GDK

What GDK does

GDK LLC operates as a full-service accounting and tax preparation firm headquartered in Lake Havasu City, Arizona. The firm provides tax preparation and filing, general accounting, payroll services, and litigation support to small-to-large businesses as well as high-profile individuals across all U.S. states. Its service portfolio includes specialized QuickBooks setup, training, and support, Peachtree/Sage expertise, and new business startup advisory for prospective entrepreneurs. The firm maintains CPA licensure and IRS representation credentials, enabling it to handle federal and state tax matters and represent clients before tax authorities.

The firm's business model is based on professional services fees for tax preparation, accounting, payroll processing, and advisory work. It serves a geographically diverse client base despite its single-office Arizona footprint, leveraging multi-state tax expertise to attract clients beyond the local market. Service mix spans routine compliance (tax preparation, payroll) to higher-value advisory work (litigation support, startup consulting, QuickBooks implementation), suggesting a tiered pricing approach. The firm appears to be a small partnership-scale practice (approximately three named professionals) with no disclosed funding, external investment, or online payment processing capabilities noted beyond standard client billing.

Evidence is limited to basic service descriptions and leadership credentials. No financial disclosures, headcount trends, client concentration data, or technology stack details are available in the input data.

Name

GDK

Legal name

GDK LLC

Website

https://gdkcpa.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

1–10 employees

Short description

GDK LLC is a full-service accounting firm in Lake Havasu City, Arizona providing tax preparation, accounting, payroll, and litigation support services to small-to-large businesses and high-profile individuals across all U.S. states.

Ownership category

akta.pro rank

Product category

Professional Accounting Services

NAICS

Offices of Certified Public Accountants (541211), Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121)

akta.pro primary industry

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

akta.pro secondary industry

Financial Planning & Analysis Support (Budgeting, Forecasting, Management Reporting) (BPAAAGAJ)

Keywords

• Accounting services
• Tax preparation
• Payroll services
• Bookkeeping services
• Litigation support

Headquarters

HQ city

Lake Havasu City

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. Professional Accounting Services: Fees for monthly, quarterly and yearly accounting and bookkeeping services including financial reporting, bank reconciliations, and management reports.
2. Tax Preparation Services: Fees for tax preparation of individual Federal and State returns (all states), business federal and state returns including corporations, partnerships, LLCs and sole proprietorships.
3. Payroll Services: Monthly state withholding taxes, federal tax deposits, quarterly 941 and state payroll tax reports, annual W-2s and 1099s preparation, annual Federal 940 Unemployment Report.
4. Litigation Support Services: Expert witness and consultant services for legal proceedings, providing accounting and auditing analysis to assist in calculation and documentation of economic loss or damage.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

GDK LLC is a full-service CPA firm providing tax preparation (federal and multi-state for individuals and businesses), accounting and payroll services (bookkeeping, financial reporting, QuickBooks setup and training, payroll tax filings), new business startup advisory, and litigation support/expert witness services. Clients are small-to-large businesses and high-profile individuals, with services delivered by experienced CPAs and customized per client scope.

Product overview

GDK is a full-service accounting firm, not a software product company. Its offering consists of a portfolio of professional service lines rather than a unified software platform or product suite. The core service lines are Tax Services (federal and multi-state tax preparation and planning for individuals and businesses), Accounting & Payroll Services (bookkeeping, financial reporting, payroll management, and QuickBooks support), Litigation Support Services (expert witness and consulting for legal proceedings), and New Business Startup Advisory (formation planning and entity selection). These services are delivered by CPAs and accounting professionals and are priced based on the complexity and scope of each client's needs.

Differentiator

Problem solved

Functional benefit

Products and services

• Tax Services Federal and state tax preparation services for individuals and businesses (corporations, partnerships, LLCs, sole proprietorships) across all U.S. states, including tax planning, quarterly estimated tax payments, and IRS representation during audits and offers in compromise.
• Accounting & Payroll Services Monthly, quarterly, and yearly accounting and payroll services including bookkeeping, financial reporting, bank reconciliations, QuickBooks setup and training, strategic business planning, budgets and cash flow projections, new business formation, and full payroll tax reporting (monthly state withholding, federal EFTPS, quarterly 941, annual W-2s and 1099s, annual Federal 940).
• Litigation Support Services Litigation support and expert witness services for clients and their attorneys, using accounting and auditing techniques to analyze, calculate, and document real or potential economic loss or damage in legal matters.
• New Business Startup Advisory Advisory services for new business formation, including business entity and accounting system selection, and preparation of business plans covering operational, marketing, and financial goals for the first 36 months of operation.

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators1 record

Recent moves4 records

Expansion highlights4 records

Emerging players

• 1-800Accountant: Virtual accounting and tax service for small businesses and individuals. Competes with GDK on small business accounting, tax preparation, and advisory with a nationwide remote-delivery model.
• Bench (by Employer.com): Tech-enabled bookkeeping service pairing software with dedicated bookkeepers for small businesses. Competes with GDK's accounting and bookkeeping services for SMB clients with a digital-first, subscription-based model.
• Pilot: Tech-enabled accounting, bookkeeping, and CFO services focused on startups, e-commerce, and SMBs. Overlaps with GDK's accounting and tax services for small business clients, particularly newer ventures.

Broad incumbents

• BDO USA: Large national accounting and advisory firm offering tax, audit, and consulting services. Competes with GDK on the tax and advisory side for SMB and individual clients, particularly those with multi-state needs.
• RSM US: Major U.S. audit, tax, and consulting firm serving middle-market businesses. Comparable to GDK in providing tax preparation, accounting, and advisory to small-to-mid-sized businesses, but at substantially greater scale and geographic reach.
• H&R Block: National tax preparation chain offering individual and small business tax services. Competes with GDK in the same core tax preparation category but at vastly greater scale, with a retail-office and digital hybrid delivery model.
• Intuit (TurboTax / QuickBooks Live): Owns TurboTax (DIY consumer tax prep) and QuickBooks Live (assisted bookkeeping for SMBs). Directly competes with GDK's tax and bookkeeping services, both as DIY software and as on-demand human-assisted offerings.
• Jackson Hewitt Tax Service: National tax preparation franchise focused on individual taxpayers. Overlaps with GDK's individual tax preparation service line and competes in the same mass-market consumer segment.
• Liberty Tax Service: Franchise-based tax preparation chain serving individuals and small businesses. Comparable to GDK in offering in-person tax preparation for similar customer segments, but operates through a franchise model across many U.S. markets.

Direct peers

• Padgett Business Services: Franchise network of small-business accounting, tax, and payroll service providers. Closely comparable to GDK in serving small and mid-sized businesses with bundled tax, bookkeeping, and payroll services through a localized model.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance1 record

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 GDK