What an S-Corp Owner Should Finish on Payroll Before December 31

Wages are a payroll event. A distribution label does not settle how an owner payment should be taxed.

For an S-Corp owner who already takes money out of the business, the year-end task is practical: give the payroll provider a complete, approved set of instructions while there is still time to act. This checklist covers the remaining 2026 pay runs, rather than choosing a salary or setting up a new company.

Put Wages and Owner Transfers Side by Side

Pull the year-to-date payroll register and the owner transaction ledger. Compare wages already paid with the compensation review for the work performed. Use the existing S-Corp salary guide for that analysis, and the fall owner-pay review for planning the cash.

Do not automatically call every nonpayroll transfer a distribution. Document whether it is a distribution, loan repayment, expense reimbursement or another transaction. The IRS compensation guidance explains that payments to a working shareholder can be reclassified as wages when reasonable compensation has not been paid. Ask the preparer and payroll provider how to correct an earlier payment; a bookkeeping label alone is not the fix.

Confirm the Pay Date, Not Just the Processing Date

Ask the provider for its final submission deadline, the date funds must be available, and the actual pay date. Schedule any approved additional compensation early enough to meet those cutoffs.

The 2026 Form W-2 instructions base wage reporting on the calendar year of payment. A paycheck first paid in January 2027 generally belongs to 2027 even when the work happened in December. Constructive-payment rules can matter when wages were already available without restriction; do not assume a backdated entry establishes that fact.

Keep confirmation of the completed run. A draft payroll report is not evidence that wages were paid, and year-end processing does not replace payroll tax deposits or returns.

Send the Shareholder Health-Insurance Total

For a shareholder owning more than 2%, including applicable ownership attribution, reconcile premiums the company paid or reimbursed during the year. Send the total and supporting records to payroll and confirm the correct treatment on the 2026 W-2.

These premiums generally belong in Box 1. Exclusion from Social Security and Medicare wages depends on the applicable plan conditions. The IRS health-insurance guidance explains the distinction; the KDM owner health-insurance guide covers the broader arrangements and deduction requirements.

Reconcile before the provider closes the year. If an entry was missed, have the provider assess the reporting correction rather than assuming the underlying payment never happened.

Separate the 401(k) Election From the Deposit

For an existing 401(k), confirm the owner's election is effective before the compensation becomes available and that any remaining 2026 deferral is reflected in eligible 2026 payroll. Do not wait until January to elect a deferral from wages already paid. Have the plan administrator check plan terms, compensation, year-to-date contributions and applicable limits before approving the final deduction.

S-Corp distributions do not support retirement-plan contributions; the owner's qualifying compensation does. IRS Publication 560 explains qualified-plan contribution rules. Special first-year rules for certain sole proprietors should not be applied to an S-Corp shareholder.

Depositing money already withheld is a separate step. For plans subject to ERISA, the Department of Labor requires prompt deposits, as soon as contributions can reasonably be separated from company assets. Owner-only arrangements require their own deadline review. December 31 is not a universal deposit deadline.

Employer contributions may qualify for deduction when funded by the employer's return deadline, including extensions, subject to plan terms and other requirements. That timing does not authorize a retroactive employee election. See the IRS explanation of employer contributions after year-end.

Close the Handoff With a Written Checklist

Before approving the last run, gather:

• Year-to-date wages and the documented compensation decision.
• Owner transfers with their supporting classifications.
• Any approved additional gross wages and the intended pay date.
• Shareholder insurance payments or reimbursements and the payroll reporting instruction.
• The effective retirement election, remaining deduction and deposit responsibility.
• Provider submission cutoffs, funding requirements and a person responsible for confirming completion.

After processing, compare the final payroll register with those instructions and resolve differences before W-2 preparation. Keep the approval and payment records together.

Finish the Pay Runs, Then Close the Year

KDM Accounting Services Inc can help reconcile the books and owner payments, identify items for the payroll provider, and coordinate the year-end review. Contact KDM before the provider's final cutoff so the remaining work has a clear owner and due date.

Reviewed for 2026. General information; the payment facts, ownership and retirement-plan terms determine the treatment.