HR Compliance Calendar

2024 HR Compliance Calendar

The following are important compliance due dates and reminders for 2024. Many of these laws and due dates apply based on the number of employees, whether or not someone conducts business with the federal government, and/or on the types of benefits offered. Other state-by-state laws may also apply.




Social Security Taxable Limit Increases

The maximum amount of earnings subject to the Social Security tax (taxable maximum) has been increased for 2024 from $160,200 to $168,600.



New annual limit on benefit contributions


2024 Limit

Additional Catch-Up


$4,150 Individual & $8,300 Family

$1,000 for 55+






$7,500 for 50+


EEO-1 Data Collection Reporting

The published deadline to submit the 2022 EEO-1 Component 1 report was December 5, 2023. Employers who did not submit their EEO-1 report by the December 5, 2023 deadline have until January 9, 2024. After that date, no additional 2022 reports will be accepted. Details regarding the 2023 annual EEO-1 reporting have not been released at the time of this publication. Information will be posted in upcoming HR Service Inc. Legal Updates as it becomes available.


Forms W-2 and 1099 due

Employers must provide all employees copies of Form W-2 reporting earnings and taxes for 2023 no later than January 31, 2024. When applicable, employers must provide Forms 1099 to those contractors who earned more than $600 in business-related payments in 2023. Employers with 250 or more employees must report the total cost of employer-sponsored group health coverage on employees’ W-2s.



Form 941

Deadline to file Form 941, employers’ quarterly tax return (fourth quarter October 2023 through December 2023).


Form 940

Deadline to file Form 940, employer’s annual Federal Unemployment (FUTA) tax return.


Post OSHA Form 300A

Employers with more than 10 employees who are not in exempt low-risk industries must post Form 300A, the annual summary of job-related injuries and illnesses, in a workplace common area from February 1 through April 30, 2024. If there were no recordable injuries or illnesses, applicable companies must still post the form with zeroes on the appropriate lines. See list of exempted industries here: Partially Exempt Industries.


Exempt status Form W-4

An employee must return a new Form W-4 claiming exempt status by February 15, 2024, to continue to be exempt from withholding for the year.

2/28/2024, 3/01/2024, 4/01/2024

ACA Forms 1094 with 1095 to IRS

Applicable Large Employers (defined as 50 full-time or full-time equivalent employees from the previous calendar year) must file 1094/1095 C forms. Self-funded and level-funded employers with fewer than 50 employees must file 1094/1095 B forms with some exceptions for distribution to the employees. Forms must be submitted to the IRS by February 28, 2024, if by paper, and by April 1, 2024, if filing electronically. Employers must provide a copy of the 1095-C or 1095-B form (unless they meet the exception criteria) to employees by March 1, 2024. Important Update: Employers with 10 or more information returns must file ACA forms electronically.



Medicare Part D to CMS

Employers offering prescription drug coverage must disclose annually to CMS on or before February 29, 2024 (or within 60 days of the start of the plan year if on a non-calendar year plan). See CMS disclosure form.


MEWA Form M-1 to IRS

All participating employers must file a Multiple Employer Welfare Arrangement (MEWA) form M-1 electronically with the IRS. Form M-1 is due on or before March 1, 2024.


ACA 1095 B/C Forms to Employees

Applicable Large Employers and employers of all sizes who offer  self-funded/level-funded plans must distribute Forms 1095 to employees by March 1, 2024. If mailed, forms must be postmarked by that date. (Some exceptions apply to B forms).



OSHA Form 300A Accident Summary Posting

Establishments of 100 or more employees in certain high-hazard industries must electronically submit information from their Form 300-Log of Work-Related Injuries and Illnesses, and Form 301-Injury and Illness Incident Report to OSHA annually via the Injury Tracking Application (ITA). Employers with at least 250 employees (including part-time, seasonal, or temporary workers) in industries covered by the recordkeeping regulation must submit information from their 2023 Form 300A by March 2, 2024. Employers with at least 20 employees but fewer than 250 in certain identified industries must submit information from their Form 300A by March 2, 2024. Click here for reporting requirements & electronic submission: OSHA.



ACA 1095 B/C Forms to IRS

Applicable Large Employers and employers of all sizes who offer self-funded/level-funded plans must submit Forms 1095 and 1094 to the IRS by April 1, 2024 if filing electronically.


(if on a calendar plan year)

Summary Plan Description (SPD)

Employers who offer a health insurance plan must provide SPDs to all participants within 120 days after a new plan is adopted. SPDs must also be provided to new participants no later than 90 days after the person first becomes covered under the plan.



Form 941

Deadline to file Form 941, employer’s quarterly tax return (first quarter January 2024 through March 2024).



RxDC Reporting

All employers who sponsor a health plan are required to submit certain prescription drug and health care spending data to CMS through the Health Insurance Oversight System (HIOS). Employers should verify with their insurance carrier, third-party administrator (TPA), or pharmacy benefit manager (PBM) to confirm if this was submitted on their behalf.


7/31/2024 (if on a calendar plan year)


Form 5500

Group plans with 100 or more participants at the beginning of the plan year must file Form 5500 annually, by the last day of the 7th month following the end of the plan year. Outside of a few exceptions, all group health plans subject to ERISA are required to file a form 5500 when they have 100+ participants. In addition, most 401(k) plans, regardless of size, are required to file form 5500. For a list of exceptions and additional information, click here to visit the IRS 5500 Center. If an extension is obtained, forms are due by October 15, 2024.



Form 941

Deadline to file Form 941, employer’s quarterly tax return (second quarter April 2024 through June 2024).



July 31, 2024 is the deadline for payment of the Patient Centered Outcomes Research Institute fee (PCORI fee). The amount of the PCORI fee is equal to the average number of lives covered during the policy year or plan year multiplied by the applicable dollar amount for the year. NOTE: The updated Form 720 is usually released in June each year; please ensure to download the correct form.



VETS-4212 Report

Government contractors must submit a VETS-4212 Report no later than September 30th of each year following a calendar year in which they held a covered government contract or subcontract. Click here for VETS-4212 reporting information.



SAR Report

Employers who offer a health insurance plan must distribute a SAR (Summary Annual Report) to plan participants within the later of nine months after end of plan year or two months after filing of Form 5500 (9/30/2024 if no extension filed for 5500). For calendar year plans that have filed for an extension using Form 5558, the SAR is due by December 15.


Medical Loss Ratios Due


Medical loss ratio (“MLR”) rebates are mandated under the Affordable Care Act whenever health insurers do not spend at least a certain percentage (generally, 80% to 85%) of the prior year’s health insurance premiums on health care services. If they fail to meet these standards, the insurance companies are required to provide a rebate to their customers. Rebates are due to policyholders by September 30 each year. Within 3 months of receipt from insurer, employers must disburse the rebate.


Medicare Part D Notice

Prior to October 15 of each year, employers must provide notice to all Part D eligible individuals, or those about to become eligible, who are covered by an employer health plan with outpatient prescription drug coverage, regardless of whether the employer coverage is primary or secondary to Medicare. The notice must be provided to all Part D eligible individuals, whether covered as active employees, retirees, COBRA recipients, disabled individuals, or dependents. Plan participants are Part D eligible if they are 65 or more years old, three months before turning age 65, and/or if they are disabled.

Note: If you provided participants with the all-in-one Employee Notification service provided by HR Service, Inc. this notice was included. See Disclosure notice.



Form 941

Deadline to file Form 941, employer’s quarterly tax return (third quarter July 2024 through September 2024).

12/31/2024(if on a calendar plan year)

Nondiscrimination Testing 401(k) plans, 125 Premium Only Plans (POP) & Flexible Spending Account (FSA) non-discrimination testing

Employers who offer 401(k), 125 POP or Flexible Spending Account plans must conduct non-discrimination testing as of the last day of their plan year to ensure that benefits are available to all eligible employees under the same terms. A good practice is to test the plan after open enrollment is complete and again at the end of the plan year. Early testing allows for modifications in plan design should discrimination testing result in a failure.



GAG Clause Attestation

Group health plans and health insurance issuers are required to annually submit a Gag Clause Prohibition Compliance Attestation (GCPCA). Fully funded plans will typically have their GCPCA requirements met by the insurance carriers. Self-funded and level-funded plans may work with their Third-Party Administrator (TPA), Pharmacy Benefits Manager (PBM), or another service provider.


For additional information or help with benefit/employment compliance, HR solutions, legal alerts, employee notices, SPD Wraps, ACA Reporting, 5500 Reporting, and more, contact HR Service, Inc. at: (855) 447-3375 x 1. or

Scroll to Top