Rollover vs leave-it: a five-factor decision framework for Long Island workers with old 401(k)s.

The dominant rollover narrative in retail financial advice is 'always roll it over.' That narrative is wrong, and it is wrong for a structural reason: rolling an old 401(k) into an IRA usually moves the assets from a low-cost institutional pricing tier into a retail pricing tier, and the receiving advisor has every incentive not to mention it.

Sometimes the right answer is a rollover. Sometimes the right answer is to consolidate into the new employer's plan. Sometimes the right answer is to leave the old plan exactly where it is — for years. The honest framework comes down to five factors. Run the household through each one before any paperwork moves.

Factor 1: Total cost (the layered fee stack, not the headline number).

The first move is always to compare total cost of ownership today versus total cost of ownership after the rollover. That means the fund expense ratios, the recordkeeping fees, the administrative charges, and any managed-account or advisory overlay — on both sides of the comparison.

A well-priced large-employer 401(k) with institutional share-class index funds (think Vanguard Institutional or Fidelity Index) and zero or near-zero recordkeeping pass-through can come in under 0.10% all-in. A retail rollover IRA at a typical commission-driven brokerage, invested in actively managed funds carrying a load and trail, can easily run 1.50% all-in. Over a 15-year working horizon at a $300,000 balance, that gap compounds into roughly $90,000 of avoidable cost.

The flip side is also true: a poorly priced legacy 401(k) — most often at smaller employers using insurance-based platforms — can carry total fees of 1.5–2% all-in. Rolling that into a low-cost IRA at a fiduciary advisor is straightforwardly the right call. The point is to do the comparison, not to assume the answer.

Factor 2: Investment menu quality.

Even a well-priced 401(k) can have a thin investment menu — no international diversification, no inflation-protected bond exposure, no small-cap allocation, or only a single fixed-income option of low quality. An IRA opens the entire investment universe.

Conversely, a great 401(k) menu can include institutional share classes, low-cost target-date funds, and stable-value funds that genuinely have no IRA equivalent. Stable-value funds in particular — common in NYC public-sector 457(b) plans and in many large-employer 401(k)s — pay a guaranteed crediting rate that no money market or short-duration bond IRA position can replicate. If a stable-value fund is doing real work in the household's portfolio, leave the plan in place to keep it.

Factor 3: Creditor protection.

ERISA-qualified 401(k) and 403(b) plans receive unlimited federal creditor protection. Rollover IRAs receive federal bankruptcy protection (currently capped, indexed for inflation) but their non-bankruptcy creditor protection is governed by state law, and New York's protections, while reasonable, are not absolute.

For most LI households this factor is academic. For a household with above-average liability exposure — a physician, a small-business owner with personal guarantees, anyone in a high-malpractice profession — the difference is meaningful. Leaving high-balance retirement assets inside an ERISA-protected employer plan can be the right call purely for asset-protection reasons.

Factor 4: Household consolidation value.

A working-age household with five legacy 401(k)s scattered across former employers has a real consolidation problem: five logins, five quarterly statements, five beneficiary designations, five rebalancing decisions. The cost of that fragmentation is not measured in dollars; it is measured in missed rebalancings, untracked beneficiary changes after divorces or deaths, and the fact that nobody — not the employee, not their CPA, not their advisor — has a complete picture of the household's actual asset allocation.

Consolidation is genuine value, and it tilts the rollover decision in favor of moving assets even when the cost analysis is roughly neutral. A single rollover IRA at a low-cost custodian with institutional share-class index funds, rebalanced on a defined cadence, with one beneficiary designation, is operationally a different animal than five legacy plans drifting away from target.

Factor 5: Roth conversion runway.

This is the factor most commonly missed in DIY decisions and the one with the biggest long-term tax consequences. Households that retire in their early-to-mid sixties typically have a multi-year window of artificially low taxable income — after wages stop, before Required Minimum Distributions begin, and often before Social Security is claimed. That window is the cheapest tax bracket the household will ever inhabit.

Roth conversions executed in that window can shift hundreds of thousands of dollars from pre-tax to Roth at marginal rates of 10–22%, versus 24–32% later when RMDs kick in or a surviving spouse is filing single. Conversions are mechanically simpler from a rollover IRA than from a former employer's 401(k) — most plans permit only full distributions or none at all, while an IRA permits arbitrary partial conversions. The Roth conversion runway argument frequently dominates the cost-comparison argument for households whose conversion windows are open.

Putting the factors together.

• Roll over when: the legacy plan is high-cost, the investment menu is thin, the household has a Roth conversion window opening in the next 1–10 years, and consolidation has real operational value.
• Leave it when: the legacy plan is low-cost, includes a strong stable-value fund or institutional share classes, the household has elevated creditor-protection needs, and consolidation is not load-bearing.
• Consolidate into the new employer plan when: the new plan is well-priced, accepts incoming rollovers (most do, but check), and the household values keeping retirement assets inside an ERISA wrapper for creditor reasons.
• Use partial actions when needed: roll a portion to an IRA for Roth conversion flexibility while leaving a stable-value sleeve in place at the old employer.

Most rollover mistakes are not made by households that decided wrong. They are made by households that decided fast — typically inside a 30-day window after leaving an employer, on the recommendation of someone whose income depends on the rollover happening. The framework above takes a few extra weeks. It is the right few weeks.