Filing Close Dates & Delayed Filing Billing

We are introducing filing close dates to provide a clear boundary for when delayed filing billing applies.

Moving forward, Check will own responsibility for on-time filing if the company filing is unblocked at least 8 business days before the filing due date. After that day, Check will process all unblocked companies and close the filing. This will populate a closed_at date on the Tax Filing API and Console page.

Any company filing processed after the filing is closed will appear as a delayed_filing in the Usage API and on your invoice. This replaces the previous logic for delayed_filing or refile_attempt .

To avoid delayed filing charges, resolve company filing blockers prior to 8 business days before the filing due date.

Reminder: delayed_filing billing will not begin until April 1, 2026.