Form 5500-EZ line-by-line map for a Solo 401(k)
A source-linked field map for owner-only Solo 401(k) sponsors preparing a simple 2025 Form 5500-EZ packet.
Summary
Form 5500-EZ is easiest to review as a packet: Part I identifies the return, Part II identifies the plan, employer, administrator and participants, Part III reconciles assets, liabilities and contributions, and Parts IV-V flag plan characteristics, loans and funding questions. Solo 5500 Desk organizes these answers; the sponsor still reviews and files.
A line-by-line map is a review aid, not a substitute for the official IRS instructions.
| Form year | 2025 Form 5500-EZReviewed against the IRS 2025 form and instructions. |
|---|---|
| Supported lane | Simple one-participant Solo 401(k)Original, on-time, owner-only defined contribution packet. |
| Hard stop | Amended, late, foreign, DB, complex plan factsThese should not be forced into a routine packet. |
Part I: identify the return before numbers
Start with the plan year dates and return type. The 2025 form asks whether the filing is first, amended, final, short plan year, filed under Form 5558 or another extension, foreign, late-filer relief, or retroactively adopted. A simple Solo 5500 Desk packet is for original on-time cases. Amended, foreign, late-relief and uncertain extension cases should stop before payment.
Part II: match plan, employer and administrator identity
Lines 1-4 are identity controls: formal plan name, three-digit plan number, effective date, employer name, EIN, phone, business code, administrator facts, and prior-name or prior-number changes. Do not invent an EIN or plan number. If prior filings, custodian records and notices do not match, reconcile identity before preparing the packet.
Participant counts: keep the one-participant assumption visible
Line 5 asks for beginning and ending participant counts, active participant counts, and certain terminated participants. For the supported Solo 401(k) lane, the important review is whether the plan still covers only owner/spouse or partner/spouse participants. Non-owner employee, leased employee, controlled group or coverage questions are professional-review cases.
Part III: reconcile assets, liabilities and contributions
Line 6 asks for beginning and ending total plan assets, liabilities and net assets. Beginning values should reconcile to the prior-year ending values when there was a prior filing. Line 7 asks for employer, participant and other contributions or rollovers. Use whole dollars and source records; do not use personal net worth, taxable brokerage values or guessed account totals.
Parts IV-V: codes, loans and plan-type warnings
Line 8 asks for applicable plan characteristic codes. Line 9 asks whether participant loans were outstanding at any time and the year-end outstanding amount. Lines 10-12 can surface defined benefit, minimum funding, waiver or pre-approved-plan facts. If those fields are not obviously routine for a simple Solo 401(k), stop and review the official instructions or use a professional.
What Solo 5500 Desk prepares
The product prepares a self-review packet with supported answers, source-record prompts, filing-method notes, hard-stop warnings and an annual passport. It does not sign, transmit, file Form 5558, manage EFAST2 credentials, correct prior years, provide tax or ERISA advice, or represent the sponsor.
Common questions
Does this page replace the IRS Form 5500-EZ instructions?
No. It is a plain-English map for review. The official IRS form and instructions control if there is any conflict.
Can Solo 5500 Desk fill every Form 5500-EZ scenario?
No. It is built for simple original on-time one-participant defined contribution packets, not amended returns, late relief, foreign plans, defined benefit plans, or complex assets.
What should I do before entering values?
Collect prior return facts, plan records, employer EIN, plan number, year-end statements, contribution records, distribution records, loan records, and any extension evidence.
Prepare a guided packet
Use Solo 5500 Desk to organize the supported Form 5500-EZ answers and warnings before you use the official filing path.
Open checkerRelated guides
Solo 401(k) $250,000 threshold for Form 5500-EZ
How the IRS $250,000 one-participant plan asset threshold works for Solo 401(k) Form 5500-EZ filing.
Solo 401(k) owner-only eligibility for Form 5500-EZ
The common-law employee question that decides whether a simple one-participant packet is still the right lane.
Which Solo 401(k) assets go on Form 5500-EZ?
How to organize beginning and ending plan assets before preparing an annual one-participant return.
Official sources
Last reviewed: .