Top 10 Outsourced Accounting Services for CPA Firms in 2025

• Best outsourced accounting services help CPA firms cut costs by up to 50%, increase accuracy, and scale faster with virtual, remote, and cloud-integrated delivery models. 
• Leading vendors offer U.S. GAAP-trained teams, SOC 2-certified platforms, FTE or subscription pricing, and white-labeled CAS solutions. 
• Choosing the right provider means balancing security, workflow alignment, and long-term scalability. 

Accounting firms are under intense pressure. The AICPA reports that more than 75% of firms continue to face hiring challenges, especially for CAS roles. Entry-level accountant salaries have jumped to over $60,000/year (BLS, 2024), while overheads for compliance, tech, and talent management are increasing. Yet, client demand for year-round support, real-time reporting, and advisory services is only growing. 

Outsourced accounting has emerged as the preferred model for CPA firms looking to build smarter, more agile practices. By partnering with virtual accounting services, firms offload day-to-day bookkeeping, payroll, and financial management to remote teams that deliver on U.S. GAAP standards, with faster turnaround and lower costs. 

More importantly, outsourcing supports strategic CAS delivery. It enables CPA firms to meet seasonal surges, scale without hiring cycles, and shift their focus to high-value advisory. With secure systems, real-time dashboards, and dedicated offshore/onshore support, outsourced accounting is no longer a cost play but rather a growth enabler. 

Top 10 Best Outsourced Accounting Services 

1. QX Accounting Services

Website: https://qxaccounting.com
QX is purpose-built for U.S. CPA firms. With over 500 firm clients, they offer offshore and onshore accounting teams trained in U.S. GAAP, CPA firm workflows, and audit standards. Services include monthly close, reconciliations, payroll, AP/AR, reporting, and white-labeled CAS delivery. Their SOC 2 and ISO 27001 compliance ensures bank-grade data security. Clients benefit from overnight delivery models, real-time dashboards, and FTE flexibility, making it a true CAS extension, not just outsourced help.

2. CapActix Business Solutions

Website: https://www.capactix.com
CapActix provides virtual accounting and CFO-level services to U.S. CPA firms and mid-sized clients. Their offshore teams deliver AP/AR, payroll, bank reconciliations, financial analysis, tax prep support, and controller services. A strong differentiator is their process automation and software compatibility across QuickBooks, Xero, Sage, and NetSuite. Firms looking for predictable delivery and cost reduction across routine CAS functions find CapActix especially effective.

3. Cherry Bekaert Client Accounting Services

Website: https://www.cbh.com
Cherry Bekaert is one of the top 25 U.S. accounting firms offering comprehensive CAS for CPA practices and their clients. Services include outsourced bookkeeping, payroll, budgeting, forecasting, and financial reporting. What makes them stand out is their deep integration with ERP platforms and finance transformation capabilities. They help CPA firms evolve from transactional accounting to strategic financial advisory models.

4. CohnReznick Client Accounting Advisory Services (CAAS)

Website: https://www.cohnreznick.com
CohnReznick offers high-end outsourced accounting, combining G/L management, financial analytics, forecasting, and KPI dashboards. Their focus is on helping CPA firms deliver forward-looking CAS to business clients. With a strong national footprint, they also offer co-sourced models and help automate multi-entity consolidation and cash flow management. This is ideal for firms expanding into virtual CFO and advisory service lines.

5. AcoBloom International

Website: https://www.acobloom.com
AcoBloom supports CPA firms with a co-sourcing model, offering dedicated teams of accountants and analysts trained in U.S. GAAP and CPA tax practices. They handle bookkeeping, AP/AR, tax prep, and payroll support with SLA-based delivery and high retention. AcoBloom is known for delivering audit-ready work, consistent quality, and robust team management structures. Their services scale well for small-to-mid-sized CPA firms managing growing CAS portfolios.

6. Anchin Client Accounting Advisory Services

Website: https://www.anchin.com
Based in New York, Anchin’s CAAS team helps CPA partners serve clients in complex revenue recognition, lease accounting, payroll, financial reporting, and financial planning. Their model is designed for firms handling multiple industries and needing tailored accounting support, especially for clients undergoing rapid growth, VC rounds, or complex audit prep. Anchin’s team delivers both back-office efficiency and high-touch financial insight.

7. Kept.Pro

Website: https://www.kept.pro
Kept is a cloud-based accounting service built for digital-era CPA firms and their SMB clients. They specialize in monthly bookkeeping, cash flow forecasting, payroll processing, and visual financial reporting. What sets Kept apart is its simplicity, fixed pricing, and client-facing dashboards. They’re ideal for firms managing tech startups, agencies, and online businesses looking for modern, clean reporting and reliable virtual service.

8. Entigrity Solutions

Website: https://www.entigrity.com
Entigrity delivers offshore staffing for U.S. CPA firms, emphasizing long-term, FTE-based partnerships. They specialize in CAS, tax prep, audit support, payroll, and client management tasks. With 7,500+ professionals trained in U.S. standards, Entigrity supports firms of all sizes, offering 1–50 FTEs depending on need. Their security credentials, training programs, and dedicated support make them a go-to for firms ready to scale without the hiring bottleneck.

9. Accountor Group

Website: https://www.accountor.com
Headquartered in Europe, Accountor has expanded into U.S.-compliant accounting, payroll, and HR services with remote delivery. Their experience in multi-country compliance, payroll regulations, and financial workflows makes them especially appealing to CPA firms with international clients or cross-border business units. They provide secure platforms, process control, and deep compliance knowledge, making them a unique global CAS partner.

10. CBIZ Outsourced Accounting Services

Website: https://www.cbiz.com
CBIZ is a large-scale U.S. firm delivering a broad suite of outsourced accounting services. Their CAS delivery includes general ledger, month-end close, payroll, budgeting, forecasting, and interim controllership. CBIZ’s national presence, tech-backed operations, and advisory integration make it ideal for CPA firms with fast-growing client bases and a need for consistent, strategic back-office support.

Why Outsourcing Accounting Services Now Makes Strategic Sense 

• Labor Shortages Are Real: With retirements and a declining CPA pipeline, firms need staffing alternatives. Outsourcing fills that gap. 
• Rising Staffing Costs: Remote accounting teams cost 30–50% less than in-house hires with equivalent output. 
• Technology Alignment: Top outsourced firms integrate seamlessly with QuickBooks, Xero, NetSuite, and custom stacks. 
• Advisory Requires Capacity: CAS growth depends on freeing internal teams from transactional tasks. 
• Security is bank-grade: SOC 2, ISO 27001, MFA, encrypted portals—outsourced teams now meet enterprise IT standards. 

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What are the best outsourced accounting services for CPA firms in 2025?

The best outsourced accounting services in 2025 offer U.S. GAAP-compliant processes, secure infrastructure, CPA-specific workflows, and remote delivery models. Top providers include QX Accounting Services, CapActix, CBIZ, CohnReznick, and Anchin, all known for their reliability, security certifications (SOC 2, ISO 27001), and ability to scale Client Accounting Services (CAS) without sacrificing quality.

How much does outsourced accounting cost for CPA firms?

Outsourced accounting costs for CPA firms typically range from $15 to $45 per hour or $2,500 to $6,500 per month per FTE. Pricing may vary based on task complexity, volume, turnaround time, and whether you’re engaging on a full-time, part-time, or per-transaction basis. Many providers offer bundled CAS packages or custom pricing for tax season support.

Is virtual accounting secure for handling sensitive financial data?

Yes—virtual accounting is secure when managed by certified providers. Always choose vendors with SOC 2 Type II or ISO 27001 certifications, encrypted servers, role-based access control, and multi-factor authentication. Ask for their data handling and breach response policies to ensure client information is fully protected.

Can solo and small CPA firms benefit from outsourced accounting?

Absolutely. Small and solo CPA firms benefit the most from outsourced accounting. It gives them access to skilled professionals without the overhead of hiring. Outsourcing supports faster turnaround times, accurate monthly closes, and the ability to offer higher-margin CAS and advisory services to clients, even with lean internal teams.

What accounting tasks can CPA firms outsource under CAS?

CPA firms can outsource nearly all Client Accounting Services, including:

• Day-to-day bookkeeping
• Payroll processing and tax filings
• Accounts payable and receivable (AP/AR)
• Bank and credit card reconciliations
• Financial reporting and dashboards
• Budgeting and cash flow forecasting
• Year-end close and tax prep support
• Client-facing advisory deliverables

Outsourcing these tasks frees up internal staff for growth and client service.

What accounting software do outsourced firms work with?

Leading outsourced accounting firms work with top platforms including QuickBooks Online/Desktop, Xero, NetSuite, Sage Intacct, CCH Axcess, and custom Excel-based workflows. Before onboarding, confirm that the provider can integrate with your tech stack, reporting preferences, and client portal setup.

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Why QX Accounting Services 

• QX is the preferred outsourced accounting partner for over 500 U.S. CPA firms. Here’s why: 
• U.S. GAAP-trained teams: Aligned with CPA workflows, audit readiness, and compliance protocols. 
• Daily task delivery: Overnight execution means reports and reconciliations are ready by morning. 
• Bank-grade security: SOC 2, ISO 27001, encrypted transfers, access-controlled environments. 
• Flexible engagement models: From part-time to full-time FTEs or project-based support. 
• Measured results: Firms report 40–60% cost savings and 2x faster turnaround in the first 90 days. 

QX is your full-service delivery partner, focused on consistency, control, and client satisfaction. 

Wrapping Up 

The rise of outsourced accounting is reshaping how CPA firms grow. It’s not just about saving money—it’s about operating smarter. The firms on this list aren’t just vendors; they’re extensions of your accounting team, giving you bandwidth, accuracy, and peace of mind. 

Whether you’re a solo practitioner struggling to hire or a regional firm scaling your CAS vertical, the best outsourced accounting services will help you modernize operations without compromising quality.