Form 5500 ERISA Deadline Calculator 2026

What Is Form 5500 and Who Must File It in 2026?

Form 5500 is the annual ERISA report that retirement and welfare benefit plans file jointly with the U.S. Department of Labor (DOL), Internal Revenue Service (IRS), and Pension Benefit Guaranty Corporation (PBGC). For tax year 2026, every ERISA-covered employee benefit plan — 401(k)s, defined benefit pensions, profit-sharing plans, ESOPs, and most welfare plans with 100+ participants — must file electronically through the DOL EFAST2 system. The form has three variants: Form 5500 (large plans, 100+ participants), Form 5500-SF (small plans, fewer than 100 participants), and Form 5500-EZ (one-participant solo 401(k) plans with no other employees). Source: DOL EBSA Form 5500.

The original due date is the last day of the seventh month after the plan year-end — that is July 31, 2026 for a calendar-year 2025 plan year, and July 31, 2027 for the 2026 plan year. Plan administrators who cannot file by then can file Form 5558 to receive an automatic 2.5-month extension, pushing the deadline to October 15. The Form 5558 itself must be filed on paper with the IRS Ogden Service Center on or before the original due date — late Form 5558s are rejected and the original deadline stands.

2026 Form 5500 Audit Trigger and Participant Count Rules

The 100-participant threshold determines whether a defined contribution plan needs an independent qualified public accountant (IQPA) audit. Effective for plan years beginning on or after January 1, 2023 (DOL final rule 87 FR 78606), the count is based on participants with account balances at the start of the plan year — not all eligible employees. This is the so-called "participant-counting methodology change" that moved many small 401(k) plans out of the audit requirement starting with 2023 filings and continues to apply in 2026.

• Fewer than 100 participants with balances at start of plan year: file Form 5500-SF, no audit required.
• 100 or more participants with balances at start of plan year: file Form 5500 with Schedule H and attach an IQPA audit report — typically $8,000-$25,000 in fees.
• "80-120 rule": A plan that filed as small last year can continue as small this year if participants remain between 80 and 120. This calculator applies the rule when start-of-year count is in that band.

DFVCP vs IRS Late-Filing Penalty: Which Applies in 2026?

If a plan misses both the original July 31 due date and the October 15 extended date, two penalty regimes activate. The DOL Delinquent Filer Voluntary Compliance Program (DFVCP) is voluntary self-correction: $10 per day of delinquency, capped at $750 per plan (small) or $2,000 per plan (large), with an annual cap of $1,500 per small plan and $4,000 per large plan. Filing under DFVCP closes both the DOL ERISA § 502(c)(2) penalty (up to $2,739/day in 2026, indexed) and the IRS § 6652(e) penalty.

If DFVCP is NOT used, the IRS late-filing penalty under § 6652(e) is $250 per day for failure to file Form 5500, with a maximum of $150,000 per plan year. Form 5500-EZ filers cannot use DFVCP — they must use the separate IRS Penalty Relief Program for one-participant plans (Rev. Proc. 2015-32), which charges $500 per delinquent return capped at $1,500 if filed within submission window. The bottom line: every small plan should use DFVCP — the $750-$2,000 cap is dramatically cheaper than the IRS $250/day clock. Last updated: May 3, 2026.