Form 5558 — 2.5-month Form 5500 extension
Form 5558 is the IRS application for an automatic 2½-month extension of the Form 5500 deadline. No reason required. The catch: the form has to reach the IRS on or before the original Form 5500 due date, or the extension isn't valid.
What Form 5558 does
Form 5558 extends the Form 5500 filing deadline by exactly 2½ calendar months from the original due date. For a calendar-year plan, that pushes July 31 to October 15. For a June 30 PYE, January 31 becomes April 15. The calculator below gives you both dates for any plan-year-end.
The extension is automatic. The IRS doesn't review or approve it. As long as the form is filed on or before the original Form 5500 due date and the plan is identified correctly, the extension takes effect.
Enter your plan-year-end date.
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The original due date is the last day of the seventh calendar month after plan-year end. With a Form 5558 extension filed by the original due date, the deadline is 2½ calendar months after that.
What Form 5558 does NOT do
Form 5558 extends the filing deadline only. It does not extend the deadline for participant disclosures, Summary Annual Reports, or any other ERISA disclosure that's independently keyed to the Form 5500 filing date.
It also doesn't extend the IRS Form 8955-SSA filing for pension plans, although the same 2½-month extension is available for that form using the same Form 5558.
One-day-late = no extension
A Form 5558 received by the IRS even one day after the original Form 5500 due date is no longer a valid extension. The plan's deadline reverts to the original due date, and any filing after that date is delinquent. This is the most common Form 5558 trap — a TPA assumes the form was filed but it lands late, and the sponsor doesn't learn about it until the DOL flags the missing filing months later.
Two ways to harden against this: (1) file the Form 5500 itself by the original due date when feasible — no extension needed; or (2) require your TPA to confirm Form 5558 receipt by the IRS in writing, with a date stamp, before the original due date passes.
If the extension never got filed
If both the original due date and the would-have-been extended due date are past and Form 5500 hasn't been filed, the plan is delinquent. The Delinquent Filer Voluntary Compliance Program (DFVCP) is the standard self-correction path — capped at $750 (small plan) or $2,000 (large plan) per single late report — but it's only available before the DOL has notified the sponsor. Walk your filing history on the Late-Filing Penalty Check below to confirm the gaps before doing anything else.
Walk your filing history for missed Form 5500s
The Late-Filing Penalty Check walks every welfare Form 5500 your sponsor filed, flags continuity gaps, and surfaces DOL, IRS, and DFVCP exposure side by side.
Open the penalty checkSources
- IRS — About Form 5558 (Application for Extension of Time to File Certain Employee Plan Returns) — Authoritative IRS landing page with the current Form 5558 and instructions.
- DOL EBSA — Form 5500 instructions and extension rules — Form 5500 series instructions reference the extension mechanic.