Tax Advisory Services Group

What Tax Advisory Services Group does

Tax Advisory Services Group is a Houston-based consulting firm founded in 2011 that counsels clients across the oil and petroleum sector on tax matters, with a stated specialty in fuels and excise tax recovery, compliance, audit defense, and procurement process review. The firm operates with 11–50 employees and serves enterprise clients operating in fuel production, distribution, consumption, and refining. Its website redirects and integrates with Ryan, LLC, a global tax services firm offering end-to-end tax recovery, consulting, advocacy, compliance, technology, and legal services across 17 practice areas.

The core technology associated with the affiliated Ryan platform is Ryan Software, a proprietary tax technology solution developed by Ryan professionals to address complex tax issues for Global 5000 corporations. The platform supports tax function transformation and improved client profitability and is delivered alongside specialized practice areas such as Fuels and Excise Tax Services and Ryan Legal Services, PLLC. The integrated offering spans income tax, property tax, employment tax, international tax, and value-added tax.

Revenue is generated primarily through professional services engagements (project-based or retainer arrangements for tax recovery, consulting, advocacy, and compliance) supplemented by subscription-style revenue from Ryan Software. Distribution is direct, with dedicated practice-area specialists targeting enterprise and mid-market clients across the United States, Canada, Europe, and Asia-Pacific. The firm uses thought-leadership content, press releases, newsletters, events, and an online expert finder as its primary marketing channels.

Name

Tax Advisory Services Group

Legal name

Ryan, LLC

Website

https://tasgroupllc.com

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

11–50 employees

Short description

Tax Advisory Services Group is a Houston-based consulting firm founded in 2011 that advises oil and petroleum sector clients on fuels and excise tax recovery, compliance, and audit defense, operating as a specialized affiliate channel into Ryan, LLC's global tax services platform.

Ownership category

akta.pro rank

Product category

Tax Advisory Services

NAICS

Other Accounting Services (541219), Accounting, Tax Preparation, Bookkeeping, and Payroll Services (5412)

SIC

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

akta.pro primary industry

Tax Advisory & Compliance (BPAHABAB)

akta.pro secondary industries

Indirect Tax (VAT/GST/Sales & Use) Services (BPAHABAJ), Transfer Pricing & International Tax Services (BPAHABAI)

Keywords

• Tax advisory services
• Fuels excise tax
• Tax recovery
• Tax compliance
• Tax consulting

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Tax Advisory and Consulting Services: Ryan generates revenue through professional services including tax recovery, consulting, advocacy, and compliance services. These are primarily project-based or retainer arrangements for enterprise clients seeking tax savings, audit support, and strategic advisory.
2. Ryan Software: Revenue from proprietary tax technology and software solutions that help clients transform their tax function and improve profitability.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Tax Advisory Services Group operates as a consulting firm providing specialized tax advisory, recovery, compliance, and consulting services, with a primary focus on the oil and petroleum sector. The firm delivers end-to-end tax solutions across multiple practice areas including fuels and excise tax, property tax, employment tax, international tax, transaction tax, and value-added tax, complemented by the proprietary Ryan Software tax technology platform.

Product overview

Tax Advisory Services Group operates Ryan, LLC, a global tax services firm offering a portfolio of tax technology and advisory services. The core product is Ryan Software, which provides tax technology and software solutions built on Ryan professionals' expertise solving complex tax issues for Global 5000 corporations. This is complemented by specialized practice area services including Fuels and Excise Tax Services (covering overpayment reviews, compliance, audit support, and procurement process reviews), and Ryan Legal Services for end-to-end legal tax solutions. The integrated service offering spans Recovery, Consulting, Advocacy, Compliance, Technology, and Legal services across multiple tax domains including income tax, property tax, employment tax, international tax, and value-added tax.

Differentiator

Problem solved

Functional benefit

Brands

• Ryan Software: Tax technology and software solutions designed to transform the tax function and improve profitability, rooted in the knowledge and experience gained by Ryan professionals solving complex issues for Global 5000 corporations.

Products and services

• Ryan Software Proprietary tax technology and software platform rooted in the knowledge and experience of Ryan professionals solving complex tax issues for Global 5000 corporations. Designed to transform the tax function and improve profitability through a wide array of tax technology solutions, available to clients via the Ryan Store.
• Fuels and Excise Tax Services Specialized tax advisory services focused on fuels and excise taxes, including overpayment reviews, compliance solutions, audit support, and procurement process reviews. Targeted at industries producing, consuming, distributing, or refining fuels, particularly oil and gas companies.
• Ryan Legal Services Next generation law firm (Ryan Legal Services, PLLC) operating as a wholly-owned subsidiary of Ryan, working with the firm to provide end-to-end tax legal solutions.
• Tax Recovery Services Service line identifying and substantiating state, local, and federal tax exemptions, credits, and overpayments. The firm recovered more than $4 billion in tax savings for premier global clients in the last year alone through these services.
• Tax Consulting and Strategic Advisory Strategic advisory services to improve overall tax performance, helping clients achieve greater profitability, cash flow, and shareholder value across the full tax function.
• Tax Advocacy Services Advocacy services unrestricted by the Sarbanes-Oxley Act of 2002, providing strategic advantages and serving as client advocate without cumbersome regulatory restrictions that limit ordinary accounting and consulting firms. Includes audit defense and controversy management.
• Tax Compliance Services Extension of client tax departments that streamlines operations, manages resources, eliminates manual processes, minimizes overpayments, and substantially reduces risk through outsourced compliance support.

Quantifiable outcome

• Recovered $4 billion in tax savings for clients last year
• +3 more outcomes

Named customers2 records

Segments9 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Alvarez & Marsal: Global professional services firm with a strong tax advisory practice including credits & incentives and property tax. Comparable on enterprise recovery and advisory engagements for distressed and complex situations.
• RSM US: Largest mid-market focused accounting firm in the US with tax advisory, credits & incentives, and international tax practices. Comparable mid-market enterprise client overlap and specialty tax positioning.
• BDO USA: Top-tier mid-market accounting firm with tax advisory, credits & incentives, and indirect tax practices. Comparable mid-market and large-enterprise client overlap, similar specialty tax positioning.
• CLA (CliftonLarsonAllen): Large US accounting and advisory firm with tax credits & incentives, state and local tax, and specialty tax practices. Comparable on mid-market enterprise tax advisory delivery.
• Grant Thornton: Mid-tier professional services firm with strong tax advisory practice spanning credits & incentives, international tax, and transaction tax. Comparable enterprise and mid-market tax advisory delivery.
• Crowe LLP: Top-tier US accounting firm with tax services including state and local tax, credits & incentives, and tax technology. Comparable mid-market enterprise service overlap and specialty tax positioning.

Broad incumbents

• Ernst & Young (EY) Tax: Big 4 tax practice offering indirect tax, tax technology, and managed services. Competes with Ryan on tax function transformation and indirect tax compliance, especially for Global 5000 clients.
• KPMG Tax: Big 4 tax practice offering indirect tax, recovery, and credits & incentives. Comparable on multi-region enterprise delivery; Sarbanes-Oxley-restricted in audit-related engagements.
• PwC Tax: Big 4 global tax practice covering recovery, indirect tax, transaction tax, and credits/incentives. Comparable on enterprise client service and multi-region reach, but Sarbanes-Oxley-constrained on advocacy.
• Deloitte Tax (Deloitte): Tax advisory services within Big 4 offering recovery, consulting, compliance, and indirect tax across all major industries. Overlaps with Ryan's fuel/excise, property, and international tax practices but is constrained by Sarbanes-Oxley on tax advocacy to audit clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/tax-advisory-services-group-llc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

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 Tax Advisory Services Group