June 11, 2026
Add totals to the Fulfillments API and alert employers of tax and 401(k) updates.
Totals on Fulfillments API
We have added a new “totals” property to the Fulfillments API, making it easier to display debit and credit amounts employers should expect after a tax liability adjustment.
Fulfillments in Check capture the result of a tax liability reconciliation for a company. They are created after quarter end balancing (see our Balancing help center article) and after payroll corrections.
We recommend incorporating Fulfillments API and these new fields into proactive notifications and screens in your payroll platform to alert employers of tax liability adjustments. In addition to these new “totals” fields, you can also use the existing Fulfillment receipt endpoint to make available a PDF breakdown of the tax liability adjustment and other metadata such as transaction dates.
Illinois Unemployment Insurance Treatment of 401(k) Contributions
Beginning July 1st, 2026, employer contributions to 401(k) plans will no longer be included in wage reporting for Illinois Unemployment Insurance tax. This change does not apply retroactively to employer contributions made before July 1st, 2026 and does not affect employee contributions.
This change has been incorporated into Check’s system. We recommend alerting employers in Illinois of this upcoming calculation change, which they can now preview on payrolls with a payday of July 1st or later.
Reminder: July 3rd is not a bank holiday
Friday, July 3rd, 2026 is an observed Federal holiday for Independence Day, but it is not a bank holiday. The Federal Reserve will remain open on July 3rd, and ACH processing will operate as usual, so it is still a valid payday for payroll processing.
For more information, visit the Federal Reserve’s Holiday Schedules website.