Updated: July 30, 2026
OPRS may receive compensation when readers open an account through partner links on this page. Our analysis is based on independent research, BBB data, and IRS publications.
30-second verdict
- For a second-career S-corp owner, the Solo 401(k) employee deferral piece closes December 31 under IRC Section 402(g), while the employer profit-share piece and any SEP-IRA contribution stay open through the tax-filing extension deadline of October 15 of the following year under IRC Section 404(h).
- The order of W-2 self-payroll, owner-K-1 distribution, and plan funding drives the year’s contribution capacity. A retired public safety officer running an S-corp must set W-2 wages on Form 941 before December 31 to size the 25 percent employer share under IRC Section 415(c)(3).
- The HELPS Act $3,000 health insurance exclusion under IRC Section 402(l) and the PSO age-50 exception under IRC Section 72(t)(10) interact with side-business plan contributions. Both pull from qualified plan distributions, not from S-corp K-1 income.
- The dealer choice on the gold IRA leg precedes the plan funding decision. A self-directed SEP-IRA or Solo 401(k) holding IRS-approved bullion under IRC Section 408(m)(3) is constrained by the dealer infrastructure behind the custodian relationship.
A retired public safety officer in the 50 to 58 age band running a second-career S-corp on the side faces a contribution-timing question the typical owner does not. Pension income arrives monthly. A governmental 457(b) sits at $200,000 to $400,000 with pre-59-and-a-half access under IRC Section 72(t)(10). S-corp W-2 wages can be set in any month of the year.
The interaction between these income streams determines the dollar capacity of the side-business retirement plan and the timing window for any self-directed gold IRA leg. our published dealer safety report before any custodian decision: the plan-funding sequence runs on top of the dealer chain you select.
Element I is the structural calendar of qualified plan contribution deadlines under IRC Sections 402(g), 404(h), and 415(c). Element II is the W-2 self-payroll mechanics that size the 25 percent employer profit-share piece. Element III is the interaction with the public safety officer age-50 exception and the HELPS Act health insurance exclusion. Element IV is the year-end timing checklist that the second-career owner has to run before any gold IRA position inside the plan.
Screen the dealer before the year-end funding decision
A self-directed retirement plan that holds IRS-approved bullion is a long-tenure custody arrangement. Run the dealer screen before any plan-funding push. The few operators on the OPRS shortlist publish the inherited-IRA service infrastructure that a rolled balance will eventually need. Several flagged operators have surfaced storage allocation issues at the distribution year.
3 of 27+ gold IRA dealers reviewed by OPRS make the 2026 trusted list. Updated July 2026.
The structural calendar of contribution deadlines
The contribution calendar for a single-owner S-corp running a Solo 401(k) or SEP-IRA splits into three checkpoint dates that the second-career owner has to plan around. The first is December 31 of the contribution year.
The Solo 401(k) employee elective deferral piece, capped at $23,500 under IRC Section 402(g) for 2025, must be deposited (or at minimum payroll-elected and identified for deposit) by year-end. The age-50 catch-up of $7,500 under IRC Section 414(v) follows the same deadline.
A Solo 401(k) plan document must also be adopted by December 31 of the year for which deferrals are intended.
The second checkpoint is April 15 of the following year, the standard tax-filing deadline for a calendar-year S-corp owner. The employer profit-share piece (25 percent of W-2 wages) for both the Solo 401(k) and the SEP-IRA can be deposited up to this date without an extension.
A SEP-IRA opened after December 31 but before April 15 of the following year can still receive a contribution for the prior tax year under IRS SEP plan sponsor guidance. The Solo 401(k) deferral piece does not allow this.
The third checkpoint is October 15 of the following year, the tax-filing extension deadline under IRC Section 6081. The employer profit-share piece on either plan can be deposited up to this date when the S-corp files Form 7004. The combined IRC Section 415(c) annual additions cap of $70,000 in 2025 still applies, with the age-50 catch-up adding $7,500.
Our view: most second-career owners under-use the October 15 employer-share window because they treat April 15 as the hard deadline; that habit forfeits six months of cash flow flexibility.
The employer profit-share piece on both the SEP-IRA and the Solo 401(k) is 25 percent of W-2 wages under IRC Section 415(c) annual additions limit, capped at $70,000 for 2025. The 25 percent applies to W-2 Box 1 wages plus pretax salary deferrals. S-corp Schedule K-1 distribution income does not count as eligible compensation under IRC Section 415(c)(3) and cannot size any qualified plan contribution.
The timing mechanics are direct. W-2 wages paid through Form 941 quarterly returns by December 31 fix the denominator for the 25 percent calculation. A retired police lieutenant paying himself $40,000 of W-2 wages supports a $10,000 employer profit-share contribution; $80,000 supports $20,000; $120,000 reaches $30,000. The stacked composition chart below shows the piece-by-piece sizing across three wage levels for a 56-year-old eligible for the age-50 catch-up.
Can you roll your account into a precious metals IRA? Eligibility checker
Most retirement money can move into a precious metals IRA once it qualifies as an eligible rollover distribution. Pick your account type and situation for a general answer. Always confirm specifics with your plan administrator or custodian.
General guidance only, not tax or financial advice. Eligibility depends on your specific plan document and IRS rules; confirm with your plan administrator and a tax advisor. A direct trustee-to-trustee transfer avoids the 60-day rule and 20% mandatory withholding.
The right dealer explains every fee up front. Get Augusta's free precious metals IRA company checklist.
The trade-off is structural. Higher W-2 wages mean higher Social Security and Medicare tax (the 15.3 percent self-employment-equivalent burden split corporation plus employee), but they lift the employer profit-share ceiling. Lower W-2 with a larger Schedule K-1 distribution saves payroll tax but caps the qualified plan contribution. In Wisconsin and Ohio, the federal payroll tax dominates the calculation.
What this means: the W-2 wage decision is the timing lever, not the contribution amount itself. Setting payroll evenly across the year, or front-loading W-2 wages in the first three quarters, gives more visibility into the December 31 plan-funding decision than waiting for a December lump-sum payroll. A December-only payroll still works for the IRS but leaves no quarterly Form 941 trail for a mid-year course correction.
Interaction with the PSO age-50 exception and the HELPS Act
The public safety officer age-50 exception under IRC Section 72(t)(10) applies to distributions from a qualified retirement plan after separation from service in or after the year the public safety officer turns age 50. The exception covers the 10 percent early-withdrawal penalty only; ordinary income tax still applies.
A retired police lieutenant who separated at age 55 with a governmental 457(b) and a pension can draw on the 457(b) for any reason after separation under IRC Section 457(d), without the §72(t) penalty. The lieutenant can also roll part of the 457(b) into the side-business Solo 401(k) and preserve the PSO exception on that rolled balance under IRC Section 72(t)(10)(A).
The timing interaction matters when the second-career owner needs cash before the December 31 plan-funding deadline. If pension income plus S-corp distributions cover the household budget, the Solo 401(k) deferral piece can absorb the full $31,000 of employee deferral plus age-50 catch-up.
If pension income is short and a 457(b) draw is needed to cover the gap, that draw counts as ordinary income and raises adjusted gross income. That shift may move the Roth-versus-traditional deferral decision on the Solo 401(k) side.
The HELPS Act health insurance exclusion under IRC Section 402(l) permits a retired public safety officer to exclude up to $3,000 per year of health insurance premiums paid from a qualified plan distribution. The exclusion runs through the 457(b), pension, or any plan that accepted the rolled balance, not through S-corp distributions.
The SECURE Act 2.0 expansion (effective 2023) allows the public safety officer to receive the distribution and pay the premium themselves rather than requiring direct payment to the insurer, per IRS Notice 2023-62. Where this matters: the $3,000 exclusion stacks with the side-business plan contribution capacity rather than competing with it.
The intra-year timing decision sequence
The six-step decision sequence below maps the second-career S-corp owner’s timing decisions across a tax year, from the January planning review to the October 15 extension deadline. Each step has a specific action that, once missed, narrows the contribution capacity for the year.
Step 1 happens in January or February: the prior-year Form 941 reconciliation against the actual W-2 wages paid sets the baseline. Step 2 sits at the end of the first quarter: a projected revenue forecast for the year sizes the realistic W-2 payroll the S-corp can support.
Step 3 falls in mid-year: the household cash flow review (pension plus 457(b) draws plus S-corp distributions) confirms how much of the projected W-2 wages can be deferred into the Solo 401(k) employee piece. Step 4 happens by October: any Roth-versus-traditional rebalancing within the Solo 401(k) deferral piece needs to be in the payroll-election record.
Step 5 closes December 31: the deferral piece must be deposited or at minimum identified for deposit; the plan document must be in place. Step 6 reopens the window through April 15 or October 15 of the following year: the employer profit-share piece can still be funded up to the IRC Section 415(c) cap.
Cash flow rhythm for a small-business retail or gun-shop S-corp
A small retail S-corp run as a second career rarely produces an even quarterly revenue distribution. Concealed-carry classes, sporting goods retail, and similar second-career business profiles cluster revenue in the second half of the year, with November and December typically supplying 30 to 45 percent of annual gross.
The cash-flow rhythm means the December 31 plan-funding push competes with year-end inventory and holiday payroll obligations. Funding the Solo 401(k) deferral piece in November rather than late December is a defensive timing choice that protects against a late-December cash shortfall.
A common misconception: that the employer profit-share piece must be funded together with the employee deferral piece. The two pieces are statutorily separable under IRC Sections 402(g) and 415(c). The owner can fund the $31,000 deferral piece by December 31 (closing IRC Section 402(g)) and defer the $30,000 to $70,000 employer profit-share funding into the next April or October.
For a second-career S-corp with lumpy holiday cash flow, this split protects the deferral piece without forcing the full annual contribution into the year-end window.
Worth knowing before you act: the Form 5500-EZ filing requirement kicks in when plan assets cross $250,000 at year-end, which a rolled $300,000 governmental 457(b) balance into a Solo 401(k) triggers immediately. The return is due July 31 of the following year; the penalty math sits in the FAQ below.
Side-by-side timing specs across the major checkpoints
The table below maps the plan-piece deadlines across the three principal checkpoints for a 2025 contribution year. The Status column reflects the typical timing-flexibility verdict for a second-career S-corp owner age 50 plus.
| Plan piece | December 31 (current year) | April 15 (following year) | October 15 (following year, with extension) | Status |
|---|---|---|---|---|
| Solo 401(k) employee deferral ($23,500) | Hard deadline | Closed | Closed | (Year-end critical) |
| Solo 401(k) age-50 catch-up ($7,500) | Hard deadline | Closed | Closed | (Year-end critical) |
| Solo 401(k) employer profit-share (25% W-2) | Optional | Default deadline | Extended deadline with Form 7004 | (Flexible) |
| SEP-IRA contribution (25% W-2 to $70,000 cap) | Optional | Default deadline (plan can be opened up to this date) | Extended deadline with Form 7004 | (Most flexible) |
| Solo 401(k) plan document adoption | Hard deadline for deferral piece | Closed for deferral piece | Closed for deferral piece | (Year-end critical) |
| 457(b) rollover into Solo 401(k) | No statutory deadline | No statutory deadline | No statutory deadline | (Plan-side timing only) |
| Roth-versus-traditional election on deferral | Hard deadline for deferral piece | Closed | Closed | (Plan-rule dependent) |
| Form 5500-EZ filing (if assets > $250,000) | N/A | N/A | July 31 deadline of following year | (Independent track) |
| HELPS Act $3,000 exclusion election (distribution-side) | Annual election on Form 1099-R | Annual | Annual | (Distribution-side only) |
Profile-specific timing verdicts
Profile A: retired PSO age 50 to 55, side-business S-corp, W-2 wages $40,000 to $60,000, governmental 457(b) intact. The Solo 401(k) is the right vehicle and the deferral piece is the timing-critical line. Setting W-2 payroll evenly across the year and funding the $23,500 employee deferral in monthly tranches gives the smoothest administration. The employer profit-share piece waits until the April or October following deadline; the 457(b) stays intact with the PSO age-50 exception preserved on the original balance.
Profile B: retired PSO age 56 to 58, side-business S-corp, W-2 wages $60,000 to $100,000, partial 457(b) rollover under consideration. The Solo 401(k) deferral piece runs the same December 31 timing, but the partial 457(b) rollover can be sequenced to land in the Solo 401(k) at any time.
One common pattern: roll the 457(b) balance to the Solo 401(k) early in the year (January or February) to start the plan-asset clock on the Form 5500-EZ threshold. Then fund the deferral piece across the year and complete the employer profit share in March or April. The gold IRA leg inside the Solo 401(k) gets the same dealer screen as a standalone self-directed IRA.
Profile C: retired PSO age 58 plus, S-corp owner, bridging to Social Security at 62 or 67. The Solo 401(k) employer profit-share piece becomes the key timing decision. The owner weighs contributing to the side-business plan versus drawing down the 457(b) for HELPS Act exclusion eligibility on Medicare premiums.
Funding the profit-share piece compresses AGI on the contribution side; the HELPS Act exclusion compresses AGI on the distribution side. The two interact: high deferral plus moderate distribution often beats no deferral plus high distribution at this profile.
Profile D: retired PSO age 50 to 58, S-corp owner, with non-spouse W-2 employee planned within 24 months. The Solo 401(k) becomes structurally ineligible the moment that employee crosses the SECURE Act 2.0 long-term part-time threshold (500 hours per year for two consecutive years). The timing decision shifts: fund the Solo 401(k) deferral piece this year, then plan an orderly conversion to a SIMPLE IRA or SEP-IRA at the tipping point.
The dealer screen runs ahead of every funding decision
A self-directed plan holding IRS-approved bullion under IRC Section 408(m)(3) only works as well as the dealer chain behind the custodian relationship.
The December 31 funding push does not control the dealer-side trade execution. The custodian places the bullion buy at the dealer’s quoted price. The dealer’s storage allocation and buyback infrastructure surface at the distribution year, often a decade later.
For the spouse or heir who inherits the plan, the dealer has to support inherited-IRA service mechanics that thin operations cannot deliver.
Augusta Precious Metals sits on the OPRS three-dealer shortlist.
OPRS checks four trust-signal markers for any dealer in the precious metals IRA cluster. The first two: Money Magazine Best Overall Gold IRA Company (2022 to 2026) and Investopedia Most Transparent Gold IRA Company (2022 to 2026). The other two: BBB A+ Rating with Zero Complaints (accredited since 2014) and 4,000-plus 5-star ratings aggregated across Trustpilot, Google, and Consumer Affairs.
The dealer minimum is industry-reported around $50,000, which fits the second-career profile that pairs an annual Solo 401(k) contribution with a partial 457(b) rollover into the same self-directed plan. The published Learn-Talk-Decide process, run by salaried, non-commissioned educators, fits a planning conversation that brings the spouse into the same room for the keeps-the-account-clean-for-your-spouse-or-heirs framing.
Compare the 4-award stack on a company-comparison checklist
The free company-comparison checklist walks through the custodian, depository, distribution-code, and rollover documentation mechanics a self-directed Solo 401(k) or SEP-IRA coordinator has to handle when the plan starts holding bullion under IRC Section 408(m)(3). The checklist is the higher-intent asset for screening a single dealer against the four-marker trust-signal stack before any plan-funding deadline closes.
OPRS may receive compensation when readers proceed. Editorial selection is independent. Updated July 2026.
What is the latest a second-career S-corp owner can fund a Solo 401(k) for the prior tax year?
The employer profit-share piece can be funded up to the tax-filing extension deadline of October 15 of the following year when the S-corp files Form 7004 for a six-month extension under IRC Section 6081. The employee deferral piece is hard-closed at December 31 of the contribution year and cannot be funded retroactively.
One common pattern for second-career owners with lumpy retail revenue: fund the deferral piece through monthly payroll deductions across the year. Then fund the employer profit-share piece as a single lump-sum contribution in March, April, or October of the following year, sized to the actual W-2 wages on Form 941.
Does a partial 457(b) rollover into a Solo 401(k) preserve the public safety officer age-50 exception?
Yes, the PSO age-50 exception under IRC Section 72(t)(10) follows the qualifying employer’s separation and the age-50 plus distribution timing, not the receiving plan’s identity.
A rolled balance into a Solo 401(k) maintained by the side-business S-corp preserves the PSO exception on that balance. The Solo 401(k) trustee must be able to document the public safety officer status and the separation date at the time of any pre-59-and-a-half distribution.
The operational risk sits on the documentation side: a Form 1099-R coded as an early distribution can be corrected on Form 5329 but the friction is real. The IRC Section 72(t)(10) at Cornell Legal Information Institute reference is the governing statute.
Can the Solo 401(k) hold IRS-approved bullion the same way a self-directed IRA can?
A self-directed Solo 401(k) can hold IRS-approved bullion when the plan document permits it and the custodian supports physical-metal custody, under IRC Section 408(m)(3). Purity floors are 99.5 percent for gold (the American Gold Eagle is the named statutory exception under IRC Section 408(m)(3)(A)), 99.9 percent for silver, and 99.95 percent for platinum and palladium.
Trustee, depository, and dealer must all be aligned before the Solo 401(k) bullion strategy holds up at distribution. Weak infrastructure on any one leg surfaces at exactly the wrong moment. The OPRS dealer shortlist identifies three operators with publicly verifiable trust signals suited to the side-business owner building a bullion allocation inside a side-business retirement plan.
What is the penalty for missing the Form 5500-EZ filing deadline once plan assets cross $250,000?
The penalty is $250 per day under IRC Section 6652(e), capped at $150,000 per missed return. A 457(b) rollover of $300,000 into a Solo 401(k) triggers the filing requirement for the rollover year, with the return due July 31 of the following year.
The IRS Form 5500-EZ delinquent filer penalty relief program offers a $500 per return reduced penalty (capped at $1,500 across all years) when a delinquent return is filed before the IRS issues a notice. The program is open to one-participant plans only and is documented in the IRS penalty relief program for Form 5500-EZ late filers.
Setting a July 1 internal deadline for the filing avoids the cliff.
Sources cited
- IRC Section 402(g), Limitation on Exclusion for Elective Deferrals
- IRC Section 414(v), Catch-Up Contributions for Individuals Age 50 or Over
- IRC Section 415(c), Limitation for Defined Contribution Plans
- IRC Section 408(m)(3), Bullion Permitted in IRAs
- IRC Section 72(t)(10), Public Safety Officers Age-50 Exception
- IRC Section 402(l), HELPS Act Health Insurance Premium Exclusion
- IRS Simplified Employee Pension Plan Sponsor Guidance
- IRS One-Participant 401(k) Plans Sponsor Guidance
- IRS Form 5500 Corner, including Form 5500-EZ for One-Participant Plans
- IRS Penalty Relief Program for Form 5500-EZ Late Filers
- IRS Notice 2023-62 on SECURE Act 2.0 Provisions