Your 401(k) on a Contract: Match, Vesting, Rollovers

You take a W-2 contract through a staffing firm, get your onboarding packet, and somewhere in the benefits section is a line about a 401(k). Maybe there is a match. Maybe there is a waiting period. Maybe you already have two old 401(k) balances sitting with previous employers because nobody explained what to do with them.

Contract work makes retirement benefits genuinely more complicated than a single-employer career. Waiting periods reset. Vesting clocks restart. Employer matches vary firm to firm. And every time you roll off a contract, there is a real chance you are walking away from money that was never fully yours.

This is the structural walkthrough: eligibility, match formulas, vesting, what happens when you leave, and where the money goes next.

How 401(k) Eligibility Works at a Staffing Firm

Federal law (ERISA) sets the outer limit on how long a plan can make you wait: generally age 21 and one year of service, defined as 1,000 hours worked in a 12-month period. That is the maximum a plan is allowed to impose, not a requirement.

Staffing firms compete for consultants, so many use shorter windows than the legal maximum. Some offer eligibility after 90 days. Some auto-enroll on your first paycheck. Others still use the full one-year, 1,000-hour window, especially for firms with a large bench of short-term placements.

A newer wrinkle: SECURE 2.0 introduced a long-term part-time employee rule, requiring plans to let employees who work at least 500 hours in each of two consecutive 12-month periods become eligible to defer their own money, even if they never hit the traditional 1,000-hour threshold. This matters if you bounce between shorter assignments with the same staffing employer.

None of this is guesswork on your part. It is written in the plan's Summary Plan Description (SPD), a document every 401(k) plan is legally required to provide. Ask your recruiter or the firm's benefits contact for it before you sign, not after.

Checklist: What to Ask Before Your First Contract Paycheck

• What is the eligibility waiting period, and what counts as an hour of service?
• What are the plan's quarterly or monthly entry dates once I am eligible?
• Is there automatic enrollment, and at what default deferral rate?
• Is there a match, and is it discretionary or fixed?
• What is the vesting schedule for employer contributions?

Employer Match Formulas: Read the SPD, Not the Slide Deck

Common formulas in the staffing world include 50% of the first 6% you defer, 100% of the first 3% plus 50% of the next 2%, and flat safe-harbor formulas of 100% up to 3% and 50% on the next 2%. None of these are universal. Every firm sets its own.

Two details matter more than the headline percentage:

• Per-pay-period vs. annual match. Some plans calculate and deposit the match every pay period. Others calculate it annually and true up in Q1 of the following year, which means if your contract ends mid-year, you may miss a true-up you would have otherwise received.
• Discretionary match language. If the SPD says the match is discretionary, the employer can reduce or suspend it, and that language is usually buried, not advertised.

None of this is negotiable at the individual consultant level. It is worth knowing so a mid-year contract ending does not surprise you with a smaller match than you expected.

Cliff Vesting vs. Graded Vesting

Vesting determines how much of the employer's money is actually yours if you leave before retirement. Your own payroll deferrals are always 100% vested immediately — no schedule applies to money you contributed yourself. The schedule only applies to what the employer put in.

Federal law caps how slow a vesting schedule can be for matching contributions. Employers can be more generous, but not stingier, than these maximums:

Employer contributions that are not matches — profit-sharing or nonelective contributions — have their own, slightly slower legal maximums (up to a 5-year cliff or a 7-year graded schedule). Your plan's actual schedule is stated in the SPD, and it is worth reading before you assume anything is vested.

What Happens to Unvested Money When You Roll Off

Rolling off a contract is a termination of employment, even if the staffing firm places you on another client project shortly after. If your break in service exceeds the plan's rules, the unvested portion of the employer's contributions is forfeited back to the plan. It does not follow you.

A few practical points:

• Your own deferrals and any earnings on them travel with you regardless of vesting status.
• Forfeited employer money is not sent to you or taxed to you — it simply disappears from your balance and is reallocated within the plan.
• Some plans have a buy-back or repayment provision if you are rehired quickly and repay a prior distribution, but this is plan-specific and uncommon in staffing-firm 401(k)s.
• Short contracts under 12 to 24 months frequently end before any employer match fully vests. Factor that into how you evaluate total compensation on a short assignment.

Rollover Options When You Change Employers

Once you separate from an employer, you generally have four choices for the vested balance:

1. Leave it in the old plan, if the plan and balance size allow it. Many plans will involuntarily cash out small balances — commonly under $7,000 following recent rule changes — into an IRA on your behalf if you take no action.
2. Direct rollover to your new employer's 401(k), assuming the new plan accepts rollovers. This is a trustee-to-trustee transfer; no taxes withheld, no 60-day clock.
3. Direct rollover to a Traditional IRA, which gives you control over investment options the old plan may not have offered.
4. Cash it out, which triggers ordinary income tax plus a 10% early withdrawal penalty if you are under 59½, and generates a Form 1099-R the following January.

If you request an indirect rollover — the check is made out to you rather than trustee-to-trustee — the plan is required to withhold 20% for federal taxes. You then have 60 days to deposit the full original balance, including the withheld 20% from your own funds, into a new retirement account to avoid tax and penalty on the shortfall. Direct rollovers avoid this entirely and are almost always the cleaner option.

Leaving the US: A Question for a CPA, Not This Article

If your contract work is tied to a visa and you are planning to leave the United States permanently, your 401(k) does not have to be cashed out immediately, but the tax treatment of a later withdrawal as a nonresident alien is genuinely complex — mandatory withholding rates, tax treaty positions, and Form 1040-NR filing obligations all come into play. This is not a do-it-yourself decision. Talk to a CPA or an international tax advisor before you take any distribution after departing the US, and before assuming early-withdrawal penalties work the same way they do for US-resident taxpayers.

Talk to Someone Before You Assume

The Josh Pros LLC team fields questions like these regularly from consultants moving between contracts. We cannot give tax advice, but we can walk you through how a specific firm's plan documents typically read before you sign an offer. Reach out at contact@joshpros.com or visit https://joshpros.com if you want a second set of eyes.

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