Audit season puts more pressure on a CPA firm’s staffing than almost any other part of the year. Experienced audit seniors are hard to hire, Form 5500 deadlines do not move, and partners still have to sign off on every engagement. Many US firms now send part of the fieldwork to an outside team: lead schedules, vouching, confirmations, roll-forwards, workpaper preparation and first-pass financial statement drafting.
Audit support outsourcing does not move the opinion. The provider prepares and documents the work, and your licensed staff review it, apply professional judgment and sign. That split matters for independence and peer review, so the best providers make it clear on their own sites that they support the audit rather than perform the attest engagement.
For this list we checked each provider’s own website for the audit services it names, such as financial statement audits, reviews, compilations, agreed-upon procedures and employee benefit plan (EBP) audits, along with the audit software it works in and where it lists an office. We left out software vendors and directories, and we left out claims we could not confirm on the company’s own pages. If you also want help with tax season, see our sister list of tax preparation outsourcing companies for CPA firms.
Firms that would rather hire a dedicated offshore audit associate and manage that person directly can compare the staffing providers in our list of offshore accounting staffing companies.
Audit Support Outsourcing Companies At A Glance
Company
Headquarters
Best For
Standout
QX Accounting Services
London, UK (US regional HQ in Bloomfield, New Jersey)
Firms that work in CaseWare or CCH Engagement
Delivery offices in India and Bogota, Colombia
Unison Globus
Ahmedabad, India (US office in Coral Springs, Florida)
Firms with review, compilation, AUP and EBP work
Support for HUD-funded entities and HOAs
Pacific Accounting & Business Services
Irving, Texas (US office)
Firms with a mix of for-profit, nonprofit and governmental audits
Yellow Book governmental audit support
Infinity Globus
Dallas, Texas
Firms that want audit staff from staff to manager level
Brochures for 401(k), HOA, HUD and nonprofit audits
VJM Global
New Delhi, India (US office in New York)
EBP audit groundwork before Form 5500 deadlines
CA-led firm with offices in six Indian cities
AcoBloom International
Noida, India
Firms that want audit files rolled forward and prepared end to end
Works in CaseWare, CCH and MyWorkpapers
Befree
Parramatta, Australia (US office in New York)
Firms that need SSARS review engagement and compliance audit support
Delivery centers across India and in Cebu, Philippines
Datamatics CPA
New York, New York
Firms that want a provider serving only CPA firms
AICPA SOC 1 Type II and SOC 2 Type II listed
Altobooks
Dover, Delaware (delivery office in Ahmedabad)
Firms outsourcing partial audit work or review engagements
Four staffing options, from hiring auditors to full assignments
Scrubbed
Burlingame, California
Firms that refer out EBP audits or need overflow help
Licensed CPA firm that does not compete for the client
Best Audit Support Outsourcing Companies In 2027
1. QX Accounting Services — Audit Workpapers And Review Support In CaseWare, Suralink And CCH
QX Accounting Services is part of QX Global Group, with its global headquarters in London and its US regional headquarters at 18 Broad Street in Bloomfield, New Jersey. Its audit support service for CPA firms covers current-year audit working papers, rolling forward electronic audit files, migrating Excel audit files to electronic formats, and reviewing financial statements for compliance with accounting standards. Checklists flag errors back to the onshore audit team.
QX describes a four-eyed review process and a hybrid nearshore and offshore staffing model. Its delivery offices are in Ahmedabad, Vadodara, Noida, Mumbai and Hyderabad in India, and in Bogota, Colombia. The team works in the tools firms already use, naming CaseWare, Suralink and CCH Engagement. QX says it is SOC 2 Type 2 compliant and holds ISO 27001 and ISO 9001 certifications.
Best for: Mid-sized and larger CPA firms that want audit file preparation and a built-in review layer inside their existing audit software.
2. Unison Globus — Review, Compilation, AUP And EBP Audit Support For CPA Firms
Unison Globus is headquartered in Ahmedabad, India, with offices in Surat and Hyderabad and a US and Canada office at 11555 Heron Bay Boulevard in Coral Springs, Florida. It serves CPAs, EAs and accounting firms, and says it has operated for more than 19 years.
Its audit and assurance service is one of the broadest on this list. External audit support covers private companies and partnerships, plus audit coordination for nonprofits, HUD-funded entities and homeowners associations, including audit schedules, confirmations and supporting workpapers. It also supports interim and annual reviews, compilations under AICPA standards, agreed-upon procedures, and EBP audits for 401(k), pension and defined benefit plans aligned with ERISA. EBP work includes testing participant data, contributions and distributions and coordinating with plan administrators and custodians. Unison cites ISO/IEC 27001:2022 certification.
Best for: Firms whose assurance mix includes reviews, compilations, AUPs and 401(k) audits, not just financial statement audits.
Pacific Accounting & Business Services (PABS) was founded in 2008 by Anand Tated, a Chartered Accountant and CFA. It lists US offices in Irving, Texas, Irvine, California and Honolulu, Hawaii, along with locations in the UK, Australia and India, and reports more than 1,400 employees.
Its white label audit support covers financial audits for for-profit entities, not-for-profit audits, employee benefit plan audits including 401(k) plans, review engagements, compilation engagements, and governmental audits under the GAO’s Yellow Book standards. The team supports planning, risk assessment, substantive testing, workpaper preparation and engagement completion. PABS says it is not tied to one software platform and lists ISO 27001, ISO 27701 and ISO 9001:2015 certifications.
Best for: Firms with governmental or nonprofit audit clients that need a provider familiar with Yellow Book work.
4. Infinity Globus — Remote Audit Teams For 401(k), HOA, HUD And Nonprofit Audits
Infinity Globus, a Springline company, is based at 5005 Lyndon B. Johnson Freeway in Dallas, Texas, and provides outsourced accounting services to accounting firms across the US. Its audit services include 401(k) audits, financial statement audits, government audits, compilation services, reviewed financial statements and HOA audit support, with service brochures for 401(k), HOA, HUD and nonprofit audits.
The firm builds remote teams that work inside a client’s existing workflows, with audit roles organized at staff, senior, supervisor and manager levels. Delivery runs through a Global Operations Center, and clients communicate through Slack, email and weekly meetings. Infinity Globus states that it is not a CPA firm and describes itself as SOC 2 Type 2 compliant.
Best for: Firms that want a standing remote audit team with seniors and supervisors, not only junior preparers.
5. VJM Global — Offshore Audit Fieldwork And EBP Audit Groundwork From India
VJM Global is a CA-led firm with its registered office in New Delhi, offices in Noida, Mumbai, Bengaluru, Chennai and Hyderabad, and a US office at 447 Broadway in New York. It also lists offices in Dubai and Dhaka. The firm describes more than 35 years of cross-border advisory experience.
Its offshore audit service for CPA firms covers workpaper preparation, vouching, confirmations and data testing, while quality control stays with the firm’s own team. A separate EBP audit service handles groundwork such as data verification and workpaper preparation for single-employer and multi-employer plans, aimed at helping firms meet Form 5500 deadlines without temporary hires. VJM says it works with US GAAP, IFRS and PCAOB standards and with CaseWare and CCH tools, and that completed workpapers pass through senior and manager checks before delivery.
Best for: Firms that need extra hands on EBP audit testing ahead of the Form 5500 filing season.
6. AcoBloom International — Audit File Preparation And Roll-Forwards For Accounting Firms
AcoBloom International is headquartered in Noida, India, with offices in New Delhi, Bengaluru, Pune, Ahmedabad, Gurugram and other Indian cities, and a US contact line for American clients. It describes nearly two decades in accounting, tax and outsourcing, and lists Allinial Global under its international associations.
Its audit support outsourcing covers preparing audit working paper files, reviewing financial statements, rolling forward audit files, moving manual files into automated audit systems, completing predefined checklists, following up on client queries and reporting errors to signing auditors. The team asks for prior-year working papers, final accounts and checklists so it can run the file the way your onshore staff would. AcoBloom names CaseWare, CCH and MyWorkpapers among the audit tools it uses, and cites ISO 27001 certification.
Best for: Firms with recurring audit clients that want last year’s file rolled forward and prepared for review.
7. Befree — Offshore Audit, Review Engagement And Compliance Audit Support For CPA Firms
Befree has its head office in Parramatta, Australia, and a US office at 136 Madison Avenue in New York. It lists delivery centers in Ahmedabad, Bengaluru, Chennai, Gandhinagar, Indore, Kochi, Vadodara and Veraval in India, plus Cebu in the Philippines. The company says it employs more than 1,500 staff and serves more than 3,000 accounting firms, advisors and businesses.
Its audit support service for US CPA firms covers three engagement types. Financial statement audit support includes workpaper preparation, lead schedules, analytical procedures, audit sampling and audit report drafting. Compliance audit support covers documentation, testing, control walkthroughs and findings preparation. Review engagement support under SSARS covers analytical procedures, inquiry documentation and financial statement preparation. Befree says it fits into a firm’s existing audit tools and uses automation for workpaper indexing, lead schedule population and confirmation tracking. Clients can engage it through an offshore delivery center model, and it cites ISO 27001 certification.
Best for: Firms with a steady flow of SSARS reviews and compliance audits that want a large provider with a named US office.
8. Datamatics CPA — Pre-Audit Reviews And Working Paper Files For CPA Firms Only
Datamatics CPA is the CPA firm practice of Datamatics Business Solutions, which was founded in 1982 and lists its US office at 146 West 29th Street in New York. The company says it provides its services exclusively to CPA and accounting firms, reports more than 1,500 accounting professionals, and is an alliance partner of PrimeGlobal.
Its audit and assurance support runs from pre-audit assessment checklists and detailed scrutiny of ledgers to materiality calculations, risk assessment and documenting working paper files. The team also prepares financial statements and schedules, performs casting, identifies supporting documents and prepares error checklists for the onshore audit team. Datamatics lists ISO/IEC 27001:2022 and ISO 9001:2015 certifications along with AICPA SOC reports for its services.
Best for: Firms that prefer a large provider that does not sell services directly to businesses that could be their clients.
9. Altobooks — Offshore Auditors For Partial Audit Work, Reviews And Compilations
Altobooks lists its US entity at 8 The Green in Dover, Delaware, with offices in Scarborough, Ontario, Ahmedabad, India and Tallinn, Estonia. It offers four ways to work: hire auditors full time or part time, hire senior accountants, outsource whole audit assignments, or build your own audit team. Firms can also outsource partial audit work.
Support covers reviews, compilations and audits, including vouching and verification, substantive testing, GAAP compliance checks, contract compliance, risk assessment and help drafting audit reports. Altobooks is clear that it is not a registered auditor and does not provide attestation, positioning its team as support for audit firms. Its case studies include a review and compilation engagement for a Boston-based CPA firm.
Best for: Smaller firms that want to outsource specific audit sections or review engagements before committing to a full team.
10. Scrubbed — EBP Audit Execution And Overflow Support For Referring CPA Firms
Scrubbed is a partner-led firm at 111 Anza Boulevard in Burlingame, California. Its attest work runs through Scrubbed Assurance, LLP, a licensed independent CPA firm, while advisory work runs through a separate non-CPA entity. That makes it a different kind of partner from the offshore providers above.
Its EBP practice audits defined contribution, defined benefit, profit-sharing and ESOP plans, and is led by professionals with more than 20 years of specialized experience. For CPA firms, Scrubbed says it can support firms that refer EBP audits or need overflow capacity, working under the referring firm’s direction on milestones, schedules, evidence and PBC logistics. It states that it does not compete for the client and does not expand scope without being asked.
Best for: Firms that want a US-based CPA partner for overflow EBP audit work during peak filing periods.
How To Choose An Audit Support Outsourcing Partner
Does The Provider Cover Your Engagement Types?
Financial statement audits, reviews, compilations, AUPs, EBP audits and Yellow Book engagements each need different checklists and experience. Match the provider’s stated services to your actual mix. A firm with a large 401(k) practice should test a provider on participant data and distribution testing, not just general audit fieldwork.
Can They Work Inside Your Audit Software?
Ask whether the team works directly in CaseWare, Caseware Cloud, CCH Engagement, Suralink, Workiva or whatever your firm uses, and whether they need their own licenses. Work prepared outside your platform adds rework at review.
How Is Independence And Responsibility Documented?
Your firm keeps responsibility for the opinion. The engagement letter with the provider should say who prepares, who reviews and who signs, and your audit client may need to be told that a third party will access its data. Check that the arrangement fits your firm’s quality management system and peer review expectations.
What Review Layers Come Before Delivery?
Several providers on this list describe senior or manager checks before work reaches you. Ask for a sample workpaper, a description of their internal review steps, and how they track review notes from your team.
How Is Client Data Secured?
Request current SOC 2 or ISO 27001 reports, not just logos, and confirm whether staff work from secured offices or remote setups. If you are comparing whole-firm options, our list of accounting outsourcing companies for CPA firms covers providers that handle audit alongside bookkeeping and tax.
Frequently Asked Questions
What Is Audit Support Outsourcing?
It is when a CPA firm sends audit preparation tasks, such as workpapers, testing, schedules and draft financial statements, to an outside team while the firm keeps review and sign-off.
Can An Outsourced Team Sign The Audit Report?
No. The engagement partner at your firm signs. Several providers here state directly that they are not registered auditors or CPA firms.
Which Engagements Are Easiest To Outsource First?
Recurring clients with clean prior-year files are the simplest place to start, because the provider can roll the file forward. Compilations, reviews and EBP testing are also common first projects.
Do These Providers Support SOC Engagements?
Most providers here hold SOC 2 reports for their own controls, which is different from supporting your SOC 1 or SOC 2 engagements. If you perform SOC work, ask each provider for specific examples before assigning it.
How Quickly Can An Audit Support Team Start?
It depends on the provider and scope. Plan for a trial engagement and onboarding period before busy season rather than starting in the middle of it.
Conclusion
The right audit support partner depends on your engagement mix and your software. QX Accounting Services and AcoBloom focus on preparing files inside the audit platforms firms already use, and Befree adds SSARS review and compliance audit support from a large delivery network. Unison Globus, Pacific Accounting & Business Services and Infinity Globus cover the widest range of engagement types, including reviews, compilations, nonprofit and governmental work. VJM Global and Scrubbed are strong options for EBP audit season, while Datamatics CPA and Altobooks suit firms that want a provider serving only accounting firms or flexible staffing.
Start with one recurring engagement, compare the provider’s workpapers against your own standards, and expand once the review process works.
