A journal entry for a 401k employer contribution is two entries, not one. When the payroll obligation arises, debit a benefits expense account and credit a 401k payable liability account for the amount the company owes the plan. When the money actually moves to the plan administrator, debit the payable and credit cash. Booking both sides in the right periods keeps your expense tied to the payroll it belongs to and preserves the deduction under Internal Revenue Code Section 404.1Office of the Law Revision Counsel. 26 USC 404 – Deduction for Contributions of an Employer to an Employees Trust or Annuity Plan
Set Up the Accounts and Pull the Numbers
Before you post anything, pull the payroll summary for the pay period. You want gross wages for each participating employee and the match percentage or dollar amount the plan calls for. Cross-check those figures against the allocation statement from the plan provider so what you book matches what the plan expects to receive.
Three accounts do the work:
- 401k Expense (sometimes labeled Employee Benefits Expense) — an income-statement account that captures the cost of employer contributions for the period.
- 401k Payable (or Accrued 401k Liability) — a balance-sheet liability for money owed to the plan but not yet remitted.
- Cash or Bank — the asset account that decreases when you send the contribution.
Apply your plan’s formula to eligible compensation to get the contribution figure. A 3% match on $50,000 of eligible payroll produces a $1,500 employer contribution. Which pay types count depends on the plan document. Base salary almost always counts; bonuses, commissions, and overtime often do; shift differentials and one-time awards sometimes don’t. Match on the wrong pay types and you’ll be writing correcting entries later.
One cap applies at the top: for 2026, the maximum annual compensation you can factor into the match for any single employee is $360,000, even if they earn more.2Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs – Notice 2025-67 If an employee earns $400,000 and the plan matches 4%, run the calculation on $360,000.
Post the Accrual Entry
Open the general journal and date the entry the last day of the pay period. That ties the expense to the period when the work was performed, which is what accrual-basis accounting requires. Using the $1,500 figure from above:
- Debit 401k Expense $1,500. Operating expense goes up on the income statement.
- Credit 401k Payable $1,500. Liability goes up on the balance sheet.
Put something specific in the memo field, like “Employer 401k match — pay period ending Oct 15, 2026.” That detail matters when a tax preparer or auditor is scrolling through the ledger months later. If the company makes both a matching contribution and a separate non-elective or profit-sharing contribution, record them on separate lines. The distinction matters for compliance testing and for Form 5500 reporting.
Review the amount before posting. A transposed digit understates the liability, and correcting entries scattered through the fiscal year create noise you don’t want during an audit.
Post the Payment Entry
When you send the money to the plan administrator, usually by ACH through the provider’s portal, book the second entry to clear the liability:
- Debit 401k Payable $1,500. Obligation comes off the balance sheet.
- Credit Cash or Bank $1,500. Cash goes down.
Save the confirmation receipt from the provider with the journal entry. That receipt is your proof the transfer happened, which you’ll want if the Department of Labor ever reviews plan operations.3U.S. Department of Labor Office of Inspector General. Understanding the Audit Process in DOL
When Forfeitures Reduce the Contribution
When an employee leaves before their employer contributions fully vest, the unvested portion goes into a forfeiture account inside the plan. Most plan documents allow forfeitures to be applied in one of three ways: reducing future employer contributions, paying plan administrative expenses, or reallocating to remaining participants’ accounts.
If your plan uses forfeitures to reduce employer contributions, the entry reflects only what the company actually has to fund. Say the calculated match for the quarter is $15,000 and the plan has $3,000 in available forfeitures. The administrator applies the forfeitures and you fund $12,000 in cash. Debit 401k Expense $12,000 and credit 401k Payable $12,000. Some companies prefer to book the gross expense of $15,000 and then a separate entry crediting 401k Expense for the $3,000 offset. Either approach works as long as the ledger clearly shows what happened and the net expense is the same.
IRS proposed regulations would require plan administrators to use forfeitures within 12 months after the end of the plan year in which they arise.4Federal Register. Use of Forfeitures in Qualified Retirement Plans Check the plan document for the specific rules that apply to your plan.
Year-End Accruals When Cash Moves in the New Year
If the fiscal year ends before you’ve remitted all employer contributions for the final pay periods, book a year-end accrual to keep the expense in the correct period. Same entry as any other accrual: debit 401k Expense, credit 401k Payable. When you remit in the following year, clear the payable with the standard cash entry.
The tax rules support this treatment. Under Section 404(a)(6), an employer contribution is treated as made on the last day of the prior tax year if it’s deposited by the tax return filing deadline (including extensions) and designated for that prior year.1Office of the Law Revision Counsel. 26 USC 404 – Deduction for Contributions of an Employer to an Employees Trust or Annuity Plan The year-end accrual is legitimate even though the cash doesn’t leave the account until the following calendar year, provided you remit before the filing deadline. For a calendar-year C corporation filing with an extension, that deadline is generally October 15 of the following year.
Keep Employer Contributions Separate From Employee Deferrals
Employee deferrals look similar on a pay stub but they are not an employer contribution and they don’t run through the 401k Expense account. Deferrals are withheld from the employee’s paycheck, so they show up inside the payroll entry: the debit to Salaries and Wages Expense covers the full gross pay, and a portion is credited to a separate 401k Employee Withholding Payable account. That liability represents money you’ve withheld from employees but haven’t yet sent to the plan.
Use a distinct liability account for employee withholdings rather than lumping them into 401k Payable. The two liabilities have different deposit deadlines, and one account for both makes it easy to miss one due date while staying current on the other. Employee deferrals in particular have to reach the plan quickly; late deposits are classified as prohibited transactions.5Internal Revenue Service. 401k Plan Fix-It Guide – You Havent Timely Deposited Employee Elective Deferrals The remittance entry for deferrals uses the same debit-payable, credit-cash structure, just against the withholding payable.
What the Entries Need to Support
Employer contributions are deductible as a business expense, but the deduction is capped at 25% of total eligible compensation paid to all plan participants during the tax year.1Office of the Law Revision Counsel. 26 USC 404 – Deduction for Contributions of an Employer to an Employees Trust or Annuity Plan On $1 million of eligible compensation, the maximum deductible employer contribution is $250,000. Anything above that carries forward to future tax years rather than being deducted in the current year, so your ledger needs to show the amount contributed clearly enough to run the 25% test against payroll.
All of these entries feed the annual Form 5500 filing, which most 401k plan sponsors are required to complete.6Internal Revenue Service. 401k Plan Fix-It Guide – You Havent Filed a Form 5500 This Year The form reports total contributions, participant counts, and plan financial data to the IRS, DOL, and Pension Benefit Guaranty Corporation.7Internal Revenue Service. Form 5500 Corner Clean journal entries during the year make that filing straightforward.
ERISA requires plan sponsors to keep records sufficient to determine benefits due each employee, and to keep them available for at least six years after the relevant Form 5500 filing date.8Department of Labor. ERISA Advisory Council – Retention of Plan Records Store each pay period’s journal entries, payroll summaries, plan allocation statements, and remittance confirmations together so you can pull them as a set.