How to Record Employer-Paid Health Insurance: W-2 Code DD and Entries

Recording employer-paid health insurance means handling two separate tasks: an informational entry on each employee’s W-2 in Box 12 using Code DD, and a set of journal entries in your general ledger that track the premium expense and any amounts withheld from paychecks. The W-2 figure never touches taxable wages; it exists so employees can see the full dollar value of their coverage.¹ The bookkeeping side is where the money actually moves, and it needs to reconcile every billing cycle.

What Goes in Box 12 With Code DD

The Code DD amount is the combined employer and employee cost of the group health plan for the calendar year. It includes your core medical coverage, whether fully insured or self-funded, and it includes on-site medical clinics or wellness programs if you charge a COBRA premium for them.²

Several benefits stay out of the total:²

Standalone dental or vision plans where employees elect or decline coverage separately and pay an additional premium.
Employer and employee HSA and HRA contributions (HSA contributions are reported separately in Box 12 using Code W).
Employee Assistance Programs, even those with health-related services.
Coverage through multiemployer (union) plans.
Self-funded arrangements not subject to COBRA.
Employee salary-reduction contributions to a health FSA under a Section 125 plan.³

One boundary matters up front: if your business filed fewer than 250 W-2s in the previous calendar year, Code DD reporting is optional. The 250 count is per employer, without aggregating related entities.²

Calculating the Year’s Total

If you buy coverage from an insurance carrier, use the premium-charged method. Pull the monthly invoices, add the employer-paid portion to the employee-paid portion for each month, and total the twelve months. That combined figure is the reportable cost.²

Self-insured employers use the COBRA applicable premium method instead, since there is no carrier invoice. The statute ties the calculation to the Section 4980B(f)(4) framework used to set COBRA premiums.³ In practice, that means using claims experience, stop-loss premiums, and administrative fees to build a per-employee cost, then leaving off the 2% administrative load COBRA otherwise allows.

Mid-year changes get handled month by month. If an employee had single coverage at $500 per month from January through June and family coverage at $1,000 per month from July through December, the total is $9,000. New hires starting mid-month can be prorated as long as you apply the same method to everyone. For terminated employees, you can either stop at the last month of active coverage or include the full cost of any COBRA continuation period (minus the 2% fee), provided you treat all former employees the same way.

Booking the Employer’s Share

When you pay the monthly premium to the carrier, the employer portion is a straightforward expense. Debit health insurance expense (or employee benefits expense) for the employer-paid amount and credit cash or accounts payable. That expense hits your income statement and reduces taxable business income for the period.

Booking Employee Payroll Deductions

Most employer health plans run through a Section 125 cafeteria plan, so the employee’s share comes out of gross pay before federal income tax, Social Security, and Medicare are calculated. That pre-tax treatment lowers the employee’s taxable wages and also reduces your matching FICA obligation.

The mechanics in the ledger look like this. Each pay period, credit a health insurance payable (or premium clearing) liability account for the amount withheld from paychecks. Those withheld funds sit in the liability account until the carrier bill is due. When you pay the invoice, debit the liability account for the collected employee contributions, debit health insurance expense for the employer’s share, and credit cash for the total. If the numbers are right, the liability account zeros out each cycle.

Post-tax deductions work the same way in the ledger but come out of net pay rather than gross. The clearing liability still gets credited and then applied against the invoice; the difference is that post-tax deductions do not reduce FICA wages. This situation usually shows up only when an employee enrolls outside the Section 125 election window.

S Corporation Shareholders Who Own More Than 2%

The normal treatment does not apply to anyone owning more than 2% of an S corporation’s stock. Health insurance premiums the company pays for these shareholder-employees get added to Box 1 wages and are subject to federal income tax withholding. They stay out of Boxes 3 and 5, so they do not trigger Social Security, Medicare, or federal unemployment tax, provided the plan covers a class of employees rather than the shareholder alone.⁴

The shareholder-employee can then claim the self-employed health insurance deduction on their personal return, which reduces adjusted gross income dollar for dollar. The deduction is available only if the plan is “established by the S corporation,” which the IRS defines as either the S corporation paying the premiums directly or the shareholder paying and being reimbursed by the corporation.⁵ A personal policy the shareholder buys and never gets reimbursed for does not qualify.

These premiums are specifically excluded from Code DD in Box 12.² Do not double-report them. On the corporate books, debit officer compensation (or shareholder health insurance expense) for the premium and credit cash or accounts payable. Running the premiums through payroll on a separate earnings code that is subject to income tax withholding but exempt from FICA keeps the W-2 boxes aligned automatically.

Filing the W-2 and Fixing Mistakes

Enter the calendar-year total in Box 12 with Code DD. The amount stays out of Box 1, Box 3, and Box 5, and it has no effect on taxable income.¹

W-2s go to employees and to the Social Security Administration by January 31 of the following year. When January 31 falls on a weekend or holiday, the deadline shifts to the next business day.⁶ Employers filing 10 or more information returns of any type during the calendar year must file electronically.⁷ The SSA’s free Business Services Online portal handles electronic submissions, and most payroll software transmits through it directly.⁸ Run your Code DD calculations well before December; January is a bad time to be building spreadsheets for employees with mid-year changes.

If you catch a wrong Code DD amount after filing, file Form W-2c with a Form W-3c transmittal and give the corrected form to the employee.⁹ The correction does not change tax liability, but filing it avoids penalties for incorrect information returns.

Speed matters because the penalty grows the longer the error sits. For returns due in 2026:¹⁰

Corrected within 30 days of the due date: $60 per return.
Corrected after 30 days but by August 1: $130 per return.
Corrected after August 1 or never filed: $340 per return.
Intentional disregard: $680 per return with no annual cap.

Code DD mistakes rarely draw enforcement action when they’re fixed promptly, but the tiered penalties give you every reason to get the number right the first time.

1
Internal Revenue Service. Reporting Employer-Provided Health Coverage on Form W-2
2
Internal Revenue Service. Form W-2 Reporting of Employer-Sponsored Health Coverage
3
Office of the Law Revision Counsel. 26 U.S. Code 6051 – Receipts for Employees
4
Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues
5
Internal Revenue Service. Special Rules for Health Insurance Costs of 2-Percent Shareholder-Employees
6
Social Security Administration. Deadline Dates to File W-2s
7
Internal Revenue Service. Topic No. 801, Who Must File Information Returns Electronically
8
Social Security Administration. Checklist for W-2/W-3 Online Filing
9
Internal Revenue Service. About Form W-2 C, Corrected Wage and Tax Statements
10
Internal Revenue Service. Information Return Penalties