Choosing the right accounting outsourcing partner is a strategic decision, not just a cost exercise. With multiple firms promising savings, compliance, and efficiency, the challenge is finding one that fits your practice’s specific needs. To help, we’ve shortlisted the leading accounting outsourcing firms in the U.S. and broken down what they offer—services, compliance, scalability, technology, and pricing models. This guide highlights where each provider excels, where they may fall short, and how to align the right partner with your firm’s growth goals and budget.
Key Takeaways
- Outsourcing accounting is strategic, not just cost-cutting
Choosing an accounting outsourcing partner is “a strategic decision, not just a cost exercise.” This means the focus shifts from simply saving money to improving accuracy, compliance, scalability and freeing up internal teams. - Compliance, technology and scalability are the differentiators
Across the list of top firms, the attributes repeatedly highlighted are: strong compliance frameworks (IRS, GDPR, SOC, etc.), robust tech (automation, AI, cloud platforms) and the ability to scale. In other words: if a firm is outsourcing accounting, they should ensure their partner can handle growth, maintain controls and leverage tech. - Different firms fit different segments
The 10 firms by “best for” categories — e.g., smaller CPA-firms, mid-sized enterprises, large multi-national operations. Example: Infinity Globus is “best for small and mid-sized CPA firms” (with QuickBooks/Xero integration) while Deloitte is positioned for large enterprises with complex, multi-country operations.
This implies you should select your partner based on your size, complexity and growth trajectory — one size does not fit all. - Technology is not optional — it is core
The AI/ML, cognitive document management, automation frameworks, and cloud platforms as key differentiators among the providers. For SMBs and growing firms, this means outsourcing isn’t just about manpower — the tech stack matters, for both efficiency and risk mitigation. - When to consider outsourcing: workload peaks + value shift
“Done right, accounting outsourcing keeps firms compliant, eases peak-season workload, and frees staff for advisory work.” So the right time to consider is when internal teams are overloaded (e.g., seasonal spikes), or you want to shift your internal focus up-the-value chain (from bookkeeping to advisory).
Top 10 Accounting Outsourcing Companies in the US (Quick Overview)
Firm | Compliance standards | Data and security | Scalability/Flexibility | Technology enablement |
|---|---|---|---|---|
Datamatics Business Solutions | 100% compliant with IRS, GDPR, SOC, CCPA, CRA, HMRC, ATO | Encrypted backups, SFTP, dual-auth, SOC 2 & ISO certified safeguards | Highly scalable with seasonal peaks and 24×7 support | Proprietary automation frameworks, cognitive document management, and AI-enabled workflows |
Infinity Globus | CPA/EA focused, aligned with U.S. tax compliance | Secure QuickBooks/Xero integrations; limited detail on wider controls | Flexible models suited for small and mid-sized CPA firms | AI-driven turnaround optimization, real-time updates via cloud platforms |
Grant Thornton | Strong compliance across local and international standards | Encryption, access controls, and structured audit frameworks | Transparent, flexible engagement models | GenAI compliance automation platform, Zoho finance transformation |
Deloitte | Global compliance with transformation-driven governance | Enterprise-grade security within AI-powered platforms | Scales across large enterprises with structured delivery models | OperateEdge™ + Zora AI™ platforms enabling autonomous finance and process mining |
KPMG | Tax, payroll, and reporting compliance across jurisdictions | Proprietary digital finance platform with enterprise security | Industry-specific scalability and global delivery | Automata Digital Finance + SAP AI-driven finance transformation |
PwC | ERP and compliance frameworks covering multi-jurisdictions | ERP-based secure delivery and shared-service environments | Rapid onboarding and hybrid scalability (local + global) | Tabulate + Navigate GST platforms, Cloud ERP Express for the finance core |
EY | Tax and finance compliance through the TFO model | Cloud-based accounting systems with multilingual, secure delivery | Co-sourcing and outsourcing flexibility | Cloud-enabled TFO platform with integrated assurance and transformation support |
IBM | Enterprise-grade compliance in AI-first outsourcing | Global AI delivery infrastructure with resilient controls | Highly scalable through AI-driven global operations | Agentic AI platform, pre-built AI assistants, outcomes-based pricing |
Genpact | Embedded compliance across tax and industry-specific models | AI/ML-powered exception handling with regulatory alignment | Flexible, domain-specific delivery with transformation support | Navigate Your Next framework, 4Es model, AI/ML-led cash flow optimization |
Infosys BPM | “Pervasive compliance” and helps clients navigate a complex regulatory landscape. | A key focus is on ensuring data integrity, confidentiality, and risk mitigation across all financial processes. | Flexible and agile, allowing businesses to adapt quickly to volume spikes, market changes, and strategic growth. | Technology is at the core of their F&A services, driving automation and transformation via an AI-first approach. |
You can also read: Procure-to-Pay Outsourcing Checklist: 10 Best Practices for Success
Select an element to maximize. Press ESC to cancel.The 10 Best Accounting Outsourcing Firms in the US [2025]
1. Datamatics Business Solutions
Best for: Businesses seeking scalable, compliant, and technology-enabled accounting outsourcing solutions.
Datamatics accounting, powered by Datamatics Business Solutions, delivers comprehensive finance and accounting outsourcing services for businesses of all sizes. Its offerings span procure-to-pay, order-to-cash, and record-to-report, supported by skilled professionals and a robust technology ecosystem.
With decades of experience, Datamatics Accounting ensures accurate reporting, seamless compliance, and scalable operations—helping businesses focus on growth rather than managing in-house finance teams.
Key service benefits provided by Datamatics Accounting
- End-to-end accounting outsourcing across Procure-to-Pay, Order-to-Cash, and Record-to-Report processes
- Intelligent automation and cognitive document management for faster, error-free processing
- Strong compliance and data security with SOC and ISO certifications
- Flexible engagement models designed for SMBs and enterprises alike
- Audit-ready accuracy with consistent, high-quality deliverables
2. Infinity Globus
Best for: Small and mid-sized CPA firms requiring dedicated teams and flexible models.
Infinity Globus provides tax and accounting for CPAs and accounting outsourcing firms. Their services are designed to help smaller firms scale efficiently.
Key differentiators of Infinity Globus
- CPA- and EA-centric operations
- Strategic global delivery alliances
- Seamless QuickBooks/Xero integration
- Full-spectrum accounting services
3. Grant Thornton
Best for: Enterprises seeking compliance-focused, AI-enabled accounting outsourcing firm with nearshore flexibility.
Grant Thornton delivers accounting outsourcing with AI-enabled platforms, nearshore delivery centers, and advisory-backed support across bookkeeping, payroll, tax, and financial reporting.
Key differentiators of Grant Thornton
- GenAI-powered compliance automation platform
- AI-driven finance transformation with Zoho integration
- Nearshore delivery through Latin American centers
- Strong global scale for multi-jurisdictional accounting
4. Deloitte
Best for: Enterprises seeking a comprehensive outsourcing strategy and vendor management.
Deloitte provides finance and accounting outsourcing firm within its advisory portfolio. Their model focuses on large enterprises managing multi-country operations.
Key differentiators of Deloitte
- Unified AI-driven finance platform
- Deep domain integration across functions
- Transformation-led global delivery
- Trusted large-scale accounting partner
5. KPMG
Best for: Companies requiring compliance-heavy outsourcing with global reach.
KPMG offers accounting outsourcing services designed for medium and large organizations. Their expertise covers accounting, reporting, and payroll.
Key differentiators of KPMG
- Proprietary digital finance platform
- Strong regulatory and compliance focus
- Integrated tax, payroll, and reporting services
- Industry-specialized accounting solutions
6. PwC
Best for: Companies aiming to optimize finance processes and shared services.
PwC provides outsourcing solutions focused on financial effectiveness and shared services. Their services are positioned for larger organizations.
Key differentiators of PwC
- Proprietary compliance and ERP platforms
- Rapid onboarding and transition frameworks
- End-to-end bookkeeping and payroll outsourcing
- Global-local delivery with compliance strength
7. EY (Ernst & Young)
Best for: Organizations needing co-sourced or fully outsourced finance and tax services.
EY’s model provides predictable outsourcing for accounting, tax, and payroll functions. Using secure cloud platforms and multilingual service delivery, the company helps enterprises streamline accounting operations and strengthen compliance.
Key differentiators of EY
- Co-sourcing and outsourcing TFO model
- One-stop multilingual global delivery
- Secure cloud-based accounting systems
- Compliance and transformation support
8. IBM
Best for: Enterprises requiring AI-enabled digital finance transformation.
IBM supports enterprise accounting outsourcing through its Agentic AI platform and global delivery infrastructure. Its services include automated bookkeeping, reporting, payroll, and financial analytics, delivered with AI-enabled accuracy and scalability.
Key differentiators of IBM
- AI-first accounting operations
- Global delivery network at scale
- Pre-built accounting automation modules
- Resilient and scalable outsourcing model
9. Genpact
Best for: Enterprises seeking domain-specific solutions and transformation support.
Genpact delivers accounting outsourcing solutions across bookkeeping, accounts payable, accounts receivable, reporting, and tax compliance. With AI and ML integration, it optimizes cash flow, accelerates reconciliations, and strengthens accounting performance.
Key differentiators of Genpact
- Full-cycle accounting outsourcing
- AI/ML-powered exception handling
- Analytics-led transformation frameworks
- Industry-aligned accounting solutions
10. Infosys BPM
Best for: Organizations seeking advanced automation and AI-led outsourcing.
Infosys BPM combines business process outsourcing with digital transformation capabilities for finance and accounting.
Key differentiators of Infosys BPM
- AI-enabled accounting platforms
- Compliance-embedded service delivery
- Broad scope across core accounting functions
- Ecosystem-driven accounting innovation
When should you opt for an accounting outsourcing partner?
Done right, accounting outsourcing keeps firms compliant, eases peak-season workload, and frees staff for advisory work. Some owners worry about trust, security, or quality, while others see it as an affordable path to growth with oversight. The real question is no longer if to outsource, but which partner can ensure accuracy, compliance, and control without added risk.
Knowing when to opt for accounting outsourcing services can make the difference between simply staying afloat and scaling with confidence.
FAQs
1. What size of business should consider outsourcing their accounting?
The article suggests both SMBs and larger enterprises can benefit — but you should match the provider to your scale and complexity.
2. What should I look for when selecting an accounting outsourcing partner?
- Strong compliance certifications (SOC 2, ISO, etc.) and regulatory alignment.
- Technology/enabling tools (automation, AI, cloud) to deliver efficiency and accuracy.
- Scalability and flexibility to handle peaks and growth.
- Clear engagement model and pricing suitable to your size and needs.
3. What types of accounting processes are typically outsourced?
Core functions such as procure-to-pay, order-to-cash, record-to-report, bookkeeping, payroll, tax compliance and financial reporting. So outsourcing can cover a broad set of transactional and reporting tasks — freeing up internal teams for higher-value work.
4. Are there common risks to watch for when outsourcing accounting?
Loss of control over compliance and data security.
Tech-gap between your internal systems and the provider’s systems.
Partner misalignment in scalability, service levels or domain expertise.
The solution is to choose a partner that clearly addresses compliance, integration and growth-readiness.
5. How do I know when my firm is ready for outsourcing accounting?
Internal teams are bogged down with routine transactions, leaving little time for strategic/ advisory work.
Seasonal/volume spikes (e.g., tax season, year-end) are causing backlog or quality issues.
You anticipate growth (new jurisdictions, more complexity) and want a partner that scales.
You want to improve accuracy, compliance and free up your people. The article frames this as: “the real question is no longer if to outsource, but which partner
Harsh Vardhan
