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Business FinanceTop 10 Best Public Accounting Services of 2026
Roundup comparing public accounting services for budgeting and vendor selection, with notes on common fit areas and provider differences, including BDO.
How we ranked these tools
An editor sets the topic, the inclusion criteria, and the evaluation framework before research starts.
AI search agents find sources, extract figures with provenance, and aggregate written reviews. They also transcribe video reviews and podcasts.
Framework: Features 40% · Ease 30% · Value 30%
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BDO is the best public accounting pick for mid-market teams needing coordinated audit, tax, and advisory under one umbrella because it ties workpaper evidence to advisory conclusions through integrated delivery, while RSM is a strong alternative for teams that want field-led audit documentation flows into review-ready working papers.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
BDO
Integrated coordination across audit, tax, and transaction services that ties financial reporting workpapers to advisory conclusions.
Best for: Fits when mid-market accounting teams need audit, tax, and advisory coverage from one coordinated firm.
RSM
Editor pickEngagement documentation built around standardized audit working papers that translate field evidence into review-ready deliverables.
Best for: Fits when mid-market teams want audit, tax, and outsourced accounting under one coordinated engagement team.
Baker Tilly
Editor pickStructured engagement quality review practices applied across audit execution and accounting advisory deliverables.
Best for: Fits when mid-market organizations need coordinated audit, accounting advisory, and reporting support.
Comparison Table
BDO
enterprise_vendorGlobal mid-tier accounting network serving mid-market and large clients.
Integrated coordination across audit, tax, and transaction services that ties financial reporting workpapers to advisory conclusions.
BDO delivers audit and assurance, tax compliance, and advisory services through engagement teams assigned by industry and geography. Core delivery includes financial statement preparation support, bookkeeping and controller-style work, and specialized attest engagements for regulated or contract-driven reporting needs.
BDO also provides transaction and valuation support for buyers, sellers, and lenders that need documented analysis aligned to professional standards. Engagement governance typically centers on documented planning, review workflows, and quality oversight for each client matter.
- +Multi-disciplinary audit, tax, and advisory teams for one shared reporting timeline
- +Industry-focused engagement staffing that reduces handoff friction across workstreams
- +Documented planning and review workflows built around professional standards compliance
- +Specialist coverage for transactions and valuations when audit evidence must connect to decisions
- –Engagement staffing and review depth can vary by office and industry coverage
- –Controller and outsourced accounting work may require tighter internal data readiness
- –Specialized services beyond audit and tax often involve separate scoping and coordination effort
- –Audit execution depends on client-provided records such as trial balance and working paper inputs
Best for: Fits when mid-market accounting teams need audit, tax, and advisory coverage from one coordinated firm.
RSM
enterprise_vendorUS-focused middle-market accounting and consulting firm.
Engagement documentation built around standardized audit working papers that translate field evidence into review-ready deliverables.
RSM pairs large-firm audit and tax capabilities with a mid-market delivery model that emphasizes hands-on field execution and review ownership. The firm supports financial statement preparation, outsourced accounting, and tax compliance plus tax advisory across multi-entity organizations.
Engagement teams coordinate audit execution workstreams and document production through structured audit working papers and standardized deliverables. RSM also provides controller and related advisory support when clients need ongoing reporting oversight rather than one-time deliverables.
- +Field-led audit execution with clear deliverable handoffs into working papers
- +Strong coverage across tax compliance and tax advisory for mixed portfolios
- +Outsourced accounting and controller-style support for recurring close needs
- +Experienced engagement teams suited to regulated and audit-heavy industries
- –Automation and API surface are not a focus of the service delivery model
- –Some workflow standardization depends on the assigned engagement team
- –Complex integrations with existing reporting stacks may require longer onboarding
- –For highly custom audit tooling, deliverables still follow established templates
Best for: Fits when mid-market teams want audit, tax, and outsourced accounting under one coordinated engagement team.
Baker Tilly
enterprise_vendorMid-market CPA and advisory firm and member of Baker Tilly International.
Structured engagement quality review practices applied across audit execution and accounting advisory deliverables.
Baker Tilly’s assurance delivery is structured around audit planning, risk assessment, and execution of audit evidence gathering, with engagement quality reviews and supervision across working papers. The firm pairs those audits with accounting advisory that targets technical accounting, reporting impacts, and practical documentation needs for management and auditors. Baker Tilly also provides tax compliance and tax advisory alongside financial statement preparation and outsourced accounting support.
A clear tradeoff is that Baker Tilly’s breadth can add coordination overhead when teams expect one workflow to cover every audit, tax, and accounting stream. Baker Tilly fits situations where management needs coordinated execution across audit and reporting timelines while internal staff can provide trial balance data and supporting schedules.
- +Assurance planning and review workflow supports audit working paper traceability.
- +Cross-functional coverage links accounting advisory to audit execution needs.
- +Tax compliance and advisory can be coordinated with reporting deliverables.
- +Supervision model supports consistent documentation standards across engagements.
- –Coordination overhead increases when audit, tax, and write-up run in parallel.
- –External data readiness depends on the client’s ability to produce schedules quickly.
- –Less suited to small scope audit consulting without broader reporting needs.
- –Engagement cadence can require tighter internal ownership of deliverable sign-offs.
CFO and controllership teams
Need audit-ready financial statement support
Faster readiness for audit work
Audit committee members
Require governance-focused assurance delivery
Clear basis for audit findings
Show 2 more scenarios
Private equity accounting staff
Support transaction-adjacent reporting scrutiny
Fewer follow-up adjustments
Accounting advisory can align technical positions with what assurance teams need to test.
Finance operations leaders
Outsource write-up and reporting cleanup
Reduced manual reconciliation work
Outsourced accounting work can produce trial balance support needed for assurance timelines.
Best for: Fits when mid-market organizations need coordinated audit, accounting advisory, and reporting support.
KPMG
enterprise_vendorBig Four firm delivering audit, tax, and advisory across industries.
Global engagement methodologies paired with sector specialists to keep audit evidence and sign-offs consistent across entities.
KPMG’s audit and assurance delivery is built around engagement planning, evidence-driven procedures, and structured review paths that fit companies needing formal accountability around audit opinion readiness. The firm’s tax practice covers compliance execution plus advisory work that connects filing positions to accounting outcomes and disclosure expectations. For organizations with multiple entities or investor reporting cycles, KPMG’s delivery model reduces handoff friction by standardizing working-paper formats and sign-off workflows across engagement teams.
- +Industry specialists align audit planning to sector-specific reporting patterns
- +Structured review workflows improve audit working papers consistency
- +Tax compliance and advisory connect filing positions to accounting disclosures
- +Transaction advisory documentation supports due diligence and close reporting
- –Large-firm governance can increase turnaround time for data clarifications
- –Engagement scoping for narrow bookkeeping needs may feel disproportionate
- –Cross-team coordination can require tighter internal scheduling and review coverage
- –Specialized experts may increase dependency on add-on staffing
Best for: Fits when large audit and tax scopes need disciplined documentation and cross-border coordination.
Crowe
enterprise_vendorPublic accounting and consulting firm serving mid-market and financial institutions.
Engagement quality review workflows tied to audit documentation standards for working paper completeness and review readiness.
Crowe delivers audit and assurance, tax compliance, and advisory work through vertically aligned teams that support multi-office delivery across the audit lifecycle. The firm’s execution emphasis shows up in engagement planning, audit working paper management, and review processes designed to meet professional standards and independence requirements.
- +Structured audit execution with disciplined engagement planning and review steps
- +Breadth across assurance, tax compliance, and advisory delivered by coordinated practices
- +Clear documentation workflows for evidence, working papers, and stakeholder deliverables
- +Designed to align with independence requirements and engagement quality reviews
- –Coordination overhead increases when scope spans multiple jurisdictions or practices
- –Outsourced accounting support can require tight data access and close schedule discipline
Best for: Fits when audit and tax work must run together with control documentation and consistent governance reporting.
EisnerAmper
enterprise_vendorAccounting and advisory firm serving financial-services and healthcare sectors.
Audit-focused engagement teams combine planning and evidence readiness with tax-position coordination for shared facts.
EisnerAmper fits organizations that need coordinated assurance and tax guidance tied to the same general ledger, trial balance, and reporting cadence. The firm’s work allocation pattern is designed around specialized engagement teams for audits, reviews, and tax positions, which helps when issues span controls, estimates, and compliance. Engagement documentation and quality controls align to professional standards for audit evidence, sampling methodology, and review execution workflows.
- +Integrated assurance and tax delivery reduces cross-team factual drift
- +Strong engagement planning for audit evidence organization and testing execution
- +Specialized coverage across regulated and multi-entity reporting needs
- +Documented quality workflow supports consistent review and sign-off
- –Cross-discipline projects require tighter internal coordination from finance
- –Audit and tax timelines can lengthen when data mapping needs expand
Best for: Fits when finance leaders need coordinated assurance and tax guidance for multi-entity reporting cycles.
CohnReznick
enterprise_vendorAccounting, tax, and advisory firm with real-estate and nonprofit strengths.
Firm-wide engagement quality review process applied to audit deliverables across assurance workstreams.
CohnReznick serves mid-market and enterprise clients with audit and assurance, tax compliance, and tax advisory delivered through dedicated engagement teams. The firm’s core strength is breadth across assurance, transaction advisory, valuation services, and controller-style support under established professional standards.
- +Audit delivery backed by structured working papers and review workflows
- +Cross-discipline coverage from assurance through transaction advisory and valuations
- +Engagement governance supports independence and professional standards compliance
- +Experienced teams handle complex filings and multi-entity reporting packages
- –Implementation cadence can feel heavy for teams needing rapid, self-serve work
- –Integration and automation surface is limited compared with software-led workflows
- –Single engagement team allocation can constrain parallel requests across business units
- –Certain specialized deliverables depend on the relevant practice group availability
Best for: Fits when mid-market organizations need coordinated assurance and tax work with structured engagement governance and review.
CBIZ
enterprise_vendorProfessional services firm offering accounting, tax, and advisory.
Coordinated delivery across outsourced accounting, tax, and assurance to reduce cross-team handoffs during reporting cycles.
CBIZ is a public accounting firm built around multi-service delivery for accounting, tax, and assurance engagements across mid-market organizations. Its core capabilities include audit and attest work, tax compliance and advisory, and outsourced accounting functions such as bookkeeping and financial statement preparation support.
- +Assurance and tax delivery can be coordinated through one firm structure
- +Outsourced accounting support helps keep trial balance to reporting cycles consistent
- +Engagement documentation supports review workflows and internal quality checks
- +Industry team assignments reduce context switching across recurring engagements
- –Workflow depth for automation and integrations is limited compared with accounting software vendors
- –Custom reporting and data extracts depend on engagement scoping and client data readiness
- –Assurance team availability can vary by service line and office coverage
- –Requires disciplined handoffs between internal bookkeeping and assurance timelines
Best for: Fits when mid-market teams need coordinated accounting operations plus recurring tax and periodic assurance support.
Plante Moran
enterprise_vendorMidwest-based CPA firm offering audit, tax, and wealth management.
Engagement quality review and audit working paper documentation controls that tighten evidence traceability across assurance deliverables.
Plante Moran provides public accounting services that cover audit and assurance work, tax compliance, and tax advisory services through structured engagement teams. Financial statement preparation and outsourced accounting support connect general ledger outputs like trial balance to evidence-ready deliverables used in assurance workflows. Engagement quality review and documentation controls are built into the delivery process to maintain professional standards compliance and consistency across engagements.
- +Coordinated assurance and tax delivery with shared engagement governance
- +Clear documentation discipline that supports audit working papers quality
- +Experienced teams for financial reporting workflows from trial balance to deliverables
- +Engagement quality review processes aligned to professional standards
- –Engagement planning and document requests can increase cycle time for ad hoc needs
- –Outsourced accounting depth varies by industry and office staffing
- –Automation and API surfaces for data integration are not a native focus
- –Cross-service coordination requires active internal point-of-contact management
Best for: Fits when finance leaders need audit-ready documentation discipline plus coordinated tax and reporting coverage.
Forvis Mazars
enterprise_vendorUS CPA firm formed by merger of BKD and Dixon Hughes Goodman with Mazars network.
Group audit coordination that connects planning, fieldwork, and reporting across multiple reporting units under one engagement structure.
Forvis Mazars serves mid-market to large organizations that need audit and assurance, tax compliance, and advisory work delivered by a professional-services network. Its service coverage spans statutory and group audit execution, financial statement preparation support, and tax advisory for cross-border requirements.
- +Coordinated audit and tax advisory delivery across related workstreams
- +Engagement quality review process supports consistent reporting outcomes
- +Breadth across statutory audit and group reporting needs
- +Specialist coverage for cross-border tax positions
- –Client responsiveness requirements can extend timelines during information gathering
- –Workflow visibility depends on assigned team and internal engagement cadence
- –Tooling depth is service-led rather than software-led for audit evidence handling
- –Automation and API surfaces are not a primary delivery mechanism
Best for: Fits when businesses need integrated audit execution plus tax advisory support across legal entities.
Conclusion
After evaluating 10 public accounting, BDO stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Public Accounting
Public accounting engagements cover audit and assurance work, tax compliance, and advisory deliverables that finance leaders coordinate across reporting timelines. This guide frames how firms such as PwC, EY, and KPMG typically execute multi-entity work alongside firms like Baker Tilly and EisnerAmper that emphasize coordinated delivery for mid-market teams.
Across the providers covered here, the practical differences show up in how teams organize evidence readiness, manage cross-discipline handoffs, and maintain engagement governance during planning, fieldwork, and reporting. The sections that follow focus on those operational mechanics rather than generic service definitions so accounting leaders can match coverage breadth to internal execution capacity.
Public Accounting services that combine assurance, tax, and accounting delivery
Public accounting is work performed by licensed firms that support financial reporting through audit and assurance engagements, tax compliance and advisory, and financial statement preparation or related accounting services. The scope often includes audit documentation standards, evidence organization for testing, and review workflows that connect engagement planning to final deliverables.
Firms such as BDO coordinate audit, tax, and transaction services to keep workpapers aligned to advisory conclusions across a shared reporting timeline. RSM structures field-led audit evidence into standardized working papers that convert execution output into review-ready deliverables for audit and tax execution.
What to verify across Public Accounting engagements and delivery workflows
Public accounting teams produce audit evidence, tax positions, and reporting deliverables on a shared timeline, so buyers need visibility into how firms structure engagement quality review and handoff between disciplines. The strongest differentiators in this set show up in evidence readiness practices, documentation controls, and the operational governance used to keep workpapers consistent from planning through reporting.
Engagement quality review discipline for working paper traceability
Baker Tilly applies structured engagement quality review practices across audit execution and accounting advisory deliverables to support audit working paper traceability. CohnReznick uses a firm-wide engagement quality review process applied across assurance workstreams to keep audit delivery aligned with its documentation workflows.
Cross-discipline coordination from assurance planning to tax conclusions
BDO coordinates audit, tax, and transaction services in a shared reporting timeline so workpapers and advisory conclusions stay aligned. EisnerAmper combines audit-focused evidence planning with tax-position coordination so shared facts do not drift across teams.
Documentation controls that enforce review readiness of audit evidence
Crowe ties engagement quality review workflows to audit documentation standards for working paper completeness and review readiness. Plante Moran applies engagement quality review and working paper documentation controls to tighten evidence traceability across assurance deliverables.
Multi-entity audit coordination across reporting units
Forvis Mazars connects planning, fieldwork, and reporting across multiple reporting units under one engagement structure. KPMG pairs global engagement methodologies with sector specialists to keep audit evidence and sign-offs consistent across entities.
Operational handoff model for outsourced accounting and recurring reporting cycles
CBIZ coordinates outsourced accounting, tax, and assurance deliveries to reduce cross-team handoffs during reporting cycles. RSM structures field-led audit execution into standardized audit working papers that translate evidence into review-ready deliverables for audit and tax execution.
Choose the delivery model that matches internal data readiness and governance capacity
The right public accounting provider depends on how internal teams handle schedules, trial balance support, and evidence packaging for audit and reporting workflows. Buyers should map internal capacity to the firm’s coordination model, evidence documentation rigor, and engagement governance overhead so timelines do not depend on ad hoc work by finance staff.
Match evidence traceability expectations to the firm’s review workflow maturity
If finance wants audit working paper traceability built into execution, prioritize Baker Tilly’s structured engagement quality review practices or Crowe’s documentation-standard driven review readiness workflows. If finance needs review governance across assurance workstreams, CohnReznick’s firm-wide engagement quality review process is the clearer fit.
Decide whether cross-discipline coordination should be scheduled or heavily managed
If cross-discipline delivery must stay tightly synchronized on a shared timeline, BDO’s integrated coordination across audit, tax, and transaction services is designed for that model. If cross-discipline alignment needs planning for shared facts while finance accepts tighter internal coordination, EisnerAmper’s audit planning with tax-position coordination targets that workflow.
Set expectations for engagement overhead when scope spans multiple jurisdictions or entities
For scope that spans multiple reporting units, Forvis Mazars connects planning, fieldwork, and reporting units under one engagement structure. For scope that needs consistent documentation and sign-offs across entities and sectors, KPMG uses global methodologies with sector specialists, which can increase turnaround time for data clarifications.
Align documentation request patterns to how quickly internal teams can package schedules
When internal teams can produce schedules quickly, firms with disciplined evidence organization like Plante Moran and RSM reduce ambiguity in review readiness. When internal teams need more flexibility, account for the cycle time impact described by Plante Moran’s document requests and Crowe’s coordination overhead for broader scope.
Confirm whether outsourced accounting delivery will rely on client data access and scoping
If outsourced accounting must stay consistent with recurring tax and assurance timelines, CBIZ’s coordinated outsourced accounting and tax delivery model focuses on reducing cross-team handoffs during reporting cycles. If outsourced accounting is part of the scope and automation or integration depth is a deciding factor, CBIZ and RSM flag limited automation and API surface as constraints compared with software-led workflows.
Evaluate operating cadence and visibility based on assigned teams
When engagement visibility and workflow consistency are essential, CohnReznick and Baker Tilly emphasize structured review workflows for governance. When workflow visibility depends on assigned team cadence, Forvis Mazars and Plante Moran describe how client responsiveness and engagement planning can extend timelines or increase cycle time.
Who should use this shortlist of Public Accounting firms
This selection targets organizations that need audit and assurance deliverables tied to tax outcomes and accounting delivery workflows. It also fits finance teams that must manage evidence readiness with clear engagement governance rather than ad hoc coordination.
Mid-market finance teams coordinating audit plus tax across a shared reporting timeline
BDO’s integrated coordination across audit, tax, and transaction services and CBIZ’s coordinated delivery across outsourced accounting, tax, and assurance are built around synchronized reporting cycles.
Finance leaders who treat working paper traceability and review readiness as a governance requirement
Crowe ties engagement quality review workflows to audit documentation standards for working paper completeness and review readiness. Plante Moran and CohnReznick also apply engagement quality review processes that tighten evidence traceability and working paper governance.
Organizations with multi-entity reporting and cross-unit evidence alignment needs
Forvis Mazars coordinates planning, fieldwork, and reporting across multiple reporting units under one engagement structure. KPMG uses sector specialists paired with global engagement methodologies to keep audit evidence and sign-offs consistent across entities.
Teams that want audit execution outputs converted into standardized review-ready deliverables
RSM uses standardized audit working papers that translate field evidence into review-ready deliverables. Baker Tilly supports traceability with structured review practices that connect advisory deliverables to audit execution.
Finance orgs that have the internal schedule discipline to respond to document requests quickly
Crowe and Plante Moran note that coordination overhead and document requests can increase cycle time if finance cannot meet evidence packaging needs quickly. Forvis Mazars also cites that client responsiveness requirements can extend timelines during information gathering.
Common pitfalls when buying Public Accounting services for reporting governance
Buyers often underestimate how engagement quality review practices affect cycle time and how much internal schedule discipline is required for evidence readiness. They also misjudge how scope complexity changes coordination overhead when audit, tax, and accounting responsibilities run in parallel across teams and entities.
Assuming audit, tax, and accounting work will align automatically without explicit cross-discipline coordination.
BDO’s integrated coordination across audit, tax, and transaction services shows what alignment looks like when teams share a reporting timeline. EisnerAmper also coordinates assurance and tax around shared facts, but it calls out tighter internal coordination needs for cross-discipline projects.
Under-scoping engagement governance for working paper completeness and review readiness.
Crowe explicitly ties engagement quality review workflows to audit documentation standards for working paper completeness and review readiness. Plante Moran and CohnReznick describe structured review practices that support traceability, so buyers should not expect lighter documentation controls to behave the same way.
Treating multi-entity scope as a simple scaling of a single-unit engagement plan.
Forvis Mazars connects planning, fieldwork, and reporting across multiple reporting units and ties timelines to client responsiveness. KPMG notes that large-firm governance can increase turnaround time for data clarifications, which can be amplified when entities and sectors are diverse.
Overestimating automation and API depth when outsourced accounting is part of the engagement.
CBIZ and RSM both describe limited automation and API surface compared with software-led workflows, which shifts integration expectations toward manual schedules and scoping. Buyers should treat automation as secondary to engagement scoping and client data readiness for these service delivery models.
Choosing based on assurance scope alone while ignoring the cadence of document requests and engagement visibility.
Crowe and Plante Moran flag that engagement planning and document requests can increase cycle time for ad hoc needs. CohnReznick also notes implementation cadence can feel heavy for teams needing rapid self-serve work, so engagement governance timing should be part of the buying decision.
How analysts checked the Public Accounting providers covered here
Analysts gathered provider coverage by using search tools to open the original publication and copy each figure that appears next to relevant passages. Analysts then compared each retained figure with the provider’s official documentation, changelog details, and any cited independent review when one was referenced.
Analysts kept figures only when they matched those supporting materials and included a published benchmark only when it was the cited source. Coverage focused on how providers describe execution mechanics and governance practices for evidence readiness, cross-discipline handoffs, and engagement review workflows.
Frequently Asked Questions About Public Accounting
Which firms handle multi-entity reporting with coordinated audit and tax deliverables?
How do onboarding and data intake workflows differ between Baker Tilly and CBIZ?
What breaks first when internal teams cannot provide trial balance and supporting schedules on time?
How do SSO, RBAC, and audit logs typically show up in firm-delivered workpaper collaboration?
How should organizations approach data migration when moving from legacy bookkeeping into outsourced accounting?
Which providers fit teams that need transaction advisory or valuation work alongside assurance?
What tradeoff appears when assurance and advisory scopes are broader than a single workflow can cover?
When does engagement quality review and professional standards compliance matter most?
How do API and integration needs affect document and schedule exchange for firms like BDO and EisnerAmper?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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