For Accounting Firms & CPA Partners
Sophisticated MSO work requires more than one firm.
Properly executed MSOs require an institutional ecosystem that most accounting firms reasonably don’t build internally — third-party §482 transfer pricing analysis, built-for-MSO premium finance, specialist tax counsel, and ongoing governance discipline. GTC™ has assembled it. We coordinate with your firm as the specialist layer; you keep the client relationship and the trusted advisor role.
How the Engagement Runs
Predictable process. Audit-readiness through documentation discipline.
A typical co-delivery MSO engagement follows four phases over an initial 12-month cycle, then transitions to ongoing annual governance.
01
Feasibility
Written feasibility report against the client's entity structure, owner economics, operating-business profile, and existing planning architecture. Projected MSO economics, applicable code-section considerations, and a structural recommendation. Six-week deliverable timeline.
02
Strategy & Design
Entity architecture and operating agreements drafted by firm-preferred counsel or GTC™’s Counsel Bench. Related-party fee methodology and §482 substantiation developed through Berkeley Research Group. Governance framework calibrated to the client’s specific operating posture.
03
Implementation
Entity formation, payroll setup, general ledger mapping for the MSO, intercompany invoice templates, related-party schedules. Where deployment strategies are part of the engagement (Schechter premium finance, Mezrah Deferral Plan™), GTC™ coordinates partner timing. The accounting firm retains tax preparation throughout.
04
Ongoing Support
Annual §482 substantiation refresh through Berkeley Research Group, meeting-minute discipline, §1202 QSBS review where applicable, §531 accumulated-earnings documentation and examination-readiness support, fee methodology updates, related-party schedule preparation. The MSO is a multi-decade structure, not a one-time setup. GTC™ stays engaged for the life of the structure.
Where MSOs Are Going
The firm stays central. GTC™ delivers the specialized layer.
MSO work done properly requires specialist methodology that sits outside the typical scope of a general accounting or advisory practice. Building the internal capability is a multi-year investment that most firms can't justify when engagement volume is intermittent. The co-delivery model solves the structural gap: the CPA firm keeps the client relationship, books the engagement, and coordinates overall tax strategy. GTC™ delivers the MSO-specific layer.
What the firm keeps
— Primary client relationship and advisor role
— Tax strategy and return preparation
— General financial advisory and planning
— Audit and assurance work
— Client communication ownership
What GTC™ handles
— MSO design and entity architecture — coordinated with firm-preferred legal counsel or GTC’s Counsel Bench
— Annual §482 substantiation through Berkeley Research Group, a global advisory firm of 1,600+ experts across 40+ offices
— Related-party fee methodology — defensible range determination, intercompany economics, supporting analysis
— Defensive active-income shift architecture — moving operating-business income into the MSO at the lower entity rate through earned mechanics, not gift transfers; may preserve lifetime exemption where the facts, services, and pricing support arm's-length treatment and supports estate, retention, and continuity deployment
— Potential §1202 positioning may be evaluated where the entity, business activity, ownership, gross-asset, holding-period, redemption, and other statutory requirements can be satisfied — annual review, holding period tracking, exit-readiness coordination
— Meeting minutes and shareholder documentation — governance discipline that reads correctly to a reviewer
— Strategy through implementation — coordination with independent subject-matter experts across continuity, exit and transition, regulatory and risk discipline, and private equity / investment capitalization
— Intercompany activity records handed to your firm in the format your preparation work requires
CPA boundary discipline. The client’s CPA firm retains responsibility for tax return positions, compliance, and any firm-level tax advice. GTC™ provides supporting MSO documentation, fee-methodology coordination, governance records, and advisor-facing implementation materials. The materials are designed to be reviewer-readable and CPA-coordinated, but the client’s tax advisors determine reporting positions and compliance treatment.
“GTC™ isn’t the preparer of record. Our role is the architecture behind the return — designed, substantiated, and documented to the file.”
— Alex Jones, CEO, Guardian Tax Consultants®
The Value to Your Firm
GTC™ doesn't replace your firm. It extends what your firm can deliver.
The choice for partners isn't whether to develop MSO methodology internally. It's whether the institutional ecosystem to make MSOs work properly already exists in your firm — or whether to coordinate with one that has it assembled. Below — the four levers that matter to firm partners.
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Revenue per Client
More fees, more compliance work, more retained returns
An MSO engagement generates additional advisory fees for the firm, new compliance work surrounding the structure (intercompany documentation, related-party schedules, governance prep), and ongoing tax return preparation for the new entity. GTC™ does not prepare returns. We coordinate the work that produces them. Revenue per client increases when the MSO is part of the architecture.
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Client Retention
Continuity deepens when the architecture is in place
A client coordinating with their CPA firm, an institutional MSO platform, specialist tax counsel, and platform partners sits inside an architecture with real continuity — economic, operational, and relational. Retention improves because the relationship structure itself becomes part of how the client’s plan operates year over year.
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Professional Risk
Third-party substantiation sits behind the methodology
Where the firm itself structures and supports an MSO without specialist methodology, the firm carries the technical risk if the structure is examined. Through GTC™, the structural methodology and §482 substantiation sit with external specialists — Berkeley Research Group on transfer pricing and management fee methodology, GTC’s Counsel Bench on entity and methodology review. The accounting firm retains its preparer, audit, and advisory roles; the structural design and substantiation work product lives with GTC™ and its specialists.
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Competitive Defense
Sophisticated capability without rebuilding the ecosystem
As closely-held business clients scale — $50M+ enterprise value, multi-entity structures, succession on the horizon — the planning conversations they want from their firm get more sophisticated. Firms without an MSO partner can either build the methodology internally (a multi-year investment) or coordinate with one that has it assembled. GTC™ is the partner that lets your firm deliver that sophistication while preserving the client relationship — without rebuilding the institutional ecosystem inside your own walls.
Engagement Models
Three structures. Calibrated to your firm's volume.
GTC™ works with accounting firms under three engagement structures, depending on volume, client complexity, and the firm's internal capacity. Across all three, the client engages GTC™ under their own letter. The accounting firm retains tax preparation, audit, and primary advisory roles.
01 · Referral
Firm refers, GTC™ engages directly
The firm refers a qualifying client. GTC™ engages directly with the client under a separate engagement letter. The firm continues as the client's tax preparer and primary advisor. Referral economics are documented at engagement.
02 · Co-Delivery
Jointly served under separate letters
The firm and GTC™ jointly serve the client under separate engagement letters. The firm leads the relationship; GTC™ delivers the MSO-specific layer; both parties coordinate documentation and meeting cadence. Revenue and economics are structured at engagement.
03 · Platform Engagement
Firm-level platform partnership
Firms with consistent volume can establish a platform-level relationship — engagement economics, methodology, and operational protocols pre-negotiated for predictable execution across multiple client engagements per year.
Illustrative Engagements
Three engagements. Three different fact patterns.
The following are sanitized profiles drawn from actual GTC™ engagements coordinated through accounting firm partners. Specific client identifiers, exact valuations, and identifying details have been adjusted to protect confidentiality. The underlying structures, code-section considerations, and economic mechanics are accurate to the work. These profiles are illustrative; mechanics shown are hypothetical and not a representation of any specific engagement.
Engineering Services · PLLC
Two-partner firm · three operating entities
MSO structure · multi-entity operating coordination · structured retention
Two 50/50 partners ran an engineering practice across three operating entities — design, installation, and service. The structure carried meaningful safety-related asset risk (employees moving between entities without documentation), no buy-sell funding mechanism, no director retention plan, and a significant age gap between the partners that complicated future exit planning.
GTC™ structured an MSO that centralized employee management through an LLC owned by the MSO — addressing the commingling risk and improving labor-allocation efficiency. The structure supported a buy-sell funding mechanism through a special-purpose entity, a tax-deferred director retention vehicle vested over time, and an operating credit facility for project funding. The accounting firm retained tax preparation and primary advisory roles throughout.
Home Building Supply
Multi-state expansion · supply chain disruption
Multi-state operating coordination · capital deployment · estate integration
A home building supply company faced multiple coordinated challenges: market expansion across state lines, COVID-era supply chain disruption, self-employment-tax exposure inside the existing LLC structure, no key-man insurance for either co-owner, and incomplete estate planning amid significant business growth.
GTC™ structured an MSO that received annual management fees substantiated through §482 analysis, providing cash flow at the MSO level that funded key-person and survivorship coverage for the ownership group, supported expansion into an additional operating market, and supported working-capital lines for inventory positioning that mitigated supply-shock exposure. The MSO became the platform coordinating the owners’ estate plan with the operating business — aligned with the accounting firm’s existing estate counsel relationship.
Featured Case · Law Firm · Litigation Specialty
Variable-income professional services firm · succession planning
Cash-flow stabilization · structured retention · succession framework
A litigation-specialty law firm faced a recurring problem: settlements produced large retained-earnings spikes in some years, while leaner years stretched liquidity. The owner held a building leased to the firm and other commercial tenants, adding liability risk and asset-commingling exposure. There was no key-employee retention plan, no succession plan, and no insurance funding the owner's eventual exit.
GTC™ structured an MSO that received annual management fees substantiated through §482 analysis, providing cash flow at the MSO level that funded multiple parallel solutions: retention vehicles vested over time for key attorneys, key-man coverage for the firm, an operating credit facility within the MSO for low-settlement years, and a structured succession framework. Active operating-business income was shifted defensively into the MSO structure through earned mechanics — funding retention, succession, and continuity without gift transfers and without consuming lifetime exemption. The MSO separated the operating company from property-management activity, addressing the commingling exposure. A cash balance plan layered into the MSO further optimized the effective rate. The MSO was elected as a C-corporation; management fees flowing into the structure were taxed at the 21% corporate rate, supported by §482 substantiation and a documented business purpose for retained earnings under §531. Because the operating law firm is an SSTB ineligible for §199A QBI treatment, the rate at the partner level on remaining pass-through income stayed at the 37% top federal bracket — but the structure captured a 16-point rate differential on the fees absorbed by the MSO, producing approximately 25% more after-tax capital available for retention and succession deployment.
The accounting firm continued as the firm's primary advisor and preparer of record throughout. The structure stabilized cash flow through settlement variability, secured succession continuity, and addressed multi-year liquidity exposure — coordinated through the firm's existing CPA and counsel relationships.
The case studies above are sanitized profiles drawn from actual GTC™ engagements. Specific identifiers, valuations, and numerical details have been adjusted to protect client confidentiality. These profiles are illustrative; mechanics shown are hypothetical and not a representation of any specific engagement. Outcomes depend on proper structuring, fact-specific application of applicable law in effect at the time, and implementation in coordination with the client's independent legal and tax counsel.
Three Ways to Engage
Calibrated to where you are.
A single ask doesn't fit every reader. Below: three entry points calibrated to where your firm is in evaluating MSO capability for your closely-held business owner clients.
01 · Quiet Diligence
Confidentially evaluate fit for one client
For partners with a specific client in mind
Submit an anonymized fact pattern under NDA. GTC™ reviews and responds with a written feasibility read within one week. No firm-level commitment. No client awareness. Pure technical evaluation.
02 · Firm-Level Evaluation
30-minute partner briefing
For partners or department heads evaluating GTC™ as a long-term structuring partner
Covers methodology, engagement structures, peer firms in current platform engagements, and the economics of co-delivery. NDA optional. The conversation focuses on fit and approach — not sales.
03 · Materials First
Review before engaging
For accounting firms earlier in the process
The Resource Center is a vetted-access reference library covering MSO architecture, §482 transfer pricing methodology, §1202 QSBS post-OBBBA reference, §531 accumulated-earnings documentation posture, the CPE program structure, and capital deployment strategies. Access reviewed manually. No commitment, no follow-up unless requested.