In recent years, employers have increasingly turned to Professional Employer Organizations (PEOs) like TriNet to manage administrative tasks such as payroll, benefits, and Affordable Care Act (ACA) reporting. While these services typically streamline business operations, occasional system errors can compromise compliance with federal regulations. One such incident occurred when TriNet’s ACA reporting system failed to include critical employee hour data. This issue not only stirred confusion among employers but also risked costly penalties for non-compliance. Fortunately, a CSV merge process provided a solution that helped rectify these reporting discrepancies and safeguard employer filings.
TLDR (Too Long, Didn’t Read)
TriNet’s ACA reporting missed key employee hour data due to gaps in system integration and reporting logic. This resulted in inaccuracies in Form 1095-C for multiple employers. A manual CSV merge process was devised to reconcile hour data and ensure regulatory compliance. The fix helped employers avoid potential IRS penalties by submitting accurate, updated ACA filings.
Understanding the Problem: What Went Wrong with ACA Reporting
TriNet’s ACA reporting error was a result of multiple technical and procedural oversights. The ACA mandates that employers provide proof of health insurance availability and eligibility through Forms 1095-C and 1094-C. One of the primary data points in this compliance exercise is the total hours employees worked during the year. This metric is vital to determine full-time status under ACA rules.
However, in TriNet’s case, some client reports were submitted without accurate hour totals for each employee. Employers relying on PEO handling assumed accuracy, only later discovering shortfalls upon IRS notification or internal audits.
Root Causes Explained
Several interlocking issues led to the omission of employee hours in ACA reports:
- Data Sync Failures: Employee hour data was sourced from timekeeping or internal payroll systems. Some of these didn’t have seamless API connections to TriNet, leading to data loss during import.
- Incompatible File Formats: Time tracking and payroll systems that exported data in differing schemas weren’t always compatible with TriNet’s import tools.
- Business Rule Gaps: TriNet’s system sometimes prioritized eligibility based on job classification or earnings instead of actual recorded hours, skewing full-time status determinations.
- Client Customizations: Employers that requested bespoke payroll or timekeeping structures found that these exceptions often conflicted with standardized ACA logic.
As a result, critical data used for line-by-line completion of 1095-C forms went missing, often defaulting to part-time assumptions when employees were in fact full-time by ACA standards.

Employer Impact
The implications of these errors were far-reaching:
- IRS Penalties: Employers face fines for non-compliance, starting at $290 per incorrect return (as of 2023), and potentially higher if failures are deemed neglectful.
- Employee Confusion: Employees received inaccurate 1095-C forms, creating uncertainty about their insurance coverage and eligibility for subsidies.
- Audit Exposure: Discrepancies triggered additional IRS scrutiny and potential audits, requiring back-up documentation for manual fixes.
- Loss of Confidence: Many businesses lost trust in the PEO model for compliance services, especially if minimal support was provided post-discovery.
The CSV Merge Process: A Technical Repair Solution
Once the issue was diagnosed, TriNet and affected employers initiated a structured CSV merge process to patch the missing data and reconstruct accurate ACA records. Here’s how it worked:
- Data Extraction: Employers were advised to export detailed hour logs from their existing timekeeping or payroll systems. This often included weekly timesheets, pay periods, and job codes.
- CSV Standardization: TriNet provided a template containing employee identifiers (Employee ID, SSN) along with specific columns for monthly hours.
- Data Mapping: Payroll or HR teams matched their internal export fields to TriNet’s schema, ensuring month-by-month hours aligned with ACA tracking.
- Merge Process: The cleaned and validated CSVs were uploaded to TriNet’s ACA portal or sent through secure encrypted channels for batch updates.
- Form Recalibration: Once merged, 1095-C forms were recalculated using corrected full-time/part-time designations. This amended employment status and offer-of-coverage codes.
The revised filings significantly reduced audit risk and ensured compliance, albeit through a labor-intensive manual workaround.
How Employers Ensured Accuracy
Employers adopted several best practices to validate and cross-check the repaired data:
- Using VLOOKUP and Excel Filters: These helped identify mismatches between TriNet’s employee list and internal records.
- Hiring ACA Consultants: Third-party experts reviewed both the original and updated forms to ensure accuracy and compliance.
- Creating Documentation Logs: Many businesses maintained logs showing data sources, reconciliation notes, and timestamps to demonstrate due diligence to regulators.
Lessons Learned and Preventive Measures
This experience offered employers a crucial set of lessons for future ACA cycles:
- Don’t Rely Solely on Automation: Always verify data integrity via manual checks, especially when compliance penalties are involved.
- Request Audit Trails: PEOs like TriNet should offer downloadable logs showcasing each step in data handling and reporting.
- Adopt Unified Systems: Employers benefit from timekeeping systems fully integrated with payroll and benefits administration to minimize disconnects.
TriNet has since updated its internal ACA logic and committed to better data pipelines to prevent similar omissions in future filings.
Frequently Asked Questions (FAQ)
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Q: What caused TriNet’s system to miss employee hours?
A: The issue stemmed from data import failures, mismatched file formats, and logic rules that prioritized classification over actual recorded hours. -
Q: Were all employers using TriNet affected?
A: No, only those employers whose employee hours weren’t properly integrated or manually verified were affected. -
Q: How did the CSV merge process fix the problem?
A: Employers provided accurate hour data exported from timekeeping systems, which was then standardized and uploaded into TriNet’s system to regenerate corrected 1095-C forms. -
Q: Can employers still be penalized after correcting the data?
A: If corrections are made proactively and timely, penalties can often be avoided or significantly reduced. Documentation of the correction process is key. -
Q: Has TriNet taken steps to prevent this from repeating?
A: Yes, TriNet has issued updates to its logic and interface and is working more closely with employers to validate data before submission.
In conclusion, while TriNet’s ACA reporting missteps created a considerable burden for employers, the solution also highlighted the importance of data accuracy in compliance workflows. By combining technological fixes with human oversight, businesses can navigate future requirements with greater confidence and efficiency.
