Switching 401(k) Providers: A 2026 Employer Guide

Plan sponsors have two primary reasons for changing 401(k) service providers — poor service and high fees. While service perception may be subjective, excessive fees can and must be quantified. And if your provider is an insurance company, a mutual fund company, or a payroll company, there is a good chance your plan is paying too much. You have the power to pay less in fees, but you will need to change providers to achieve it.

While changing providers may appear daunting, your new provider will lead the process, provide timelines, and complete most of the tasks needed to complete the change. Your role is primarily to manage communications with the outgoing provider and provide mandated notices to your employees. With an understanding of how and when the process unfolds, you can approach the change confidently and efficiently.

This guide lays out a step-by-step blueprint for changing providers, explains costs and responsibilities, and how to avoid potential pitfalls along the way.

What Does It Mean to Switch 401(k) Providers?

Switching 401(k) providers means moving your existing plan's administration and assets to a new provider while the plan itself continues uninterrupted. The industry calls this a "conversion." Your plan doesn't end and restart. It keeps its identity, its assets, its participants, and its history — a new company simply takes over running it.

Some sponsors assume the way to change providers is to shut down the existing plan and open a new one with the new provider. That approach creates an expensive problem.

When you terminate a 401(k) plan, your employees become entitled to take their money out — cash it in, roll it to an IRA, or move it to another employer's plan. But under Treas. Reg. §1.401(k)-1(d)(4), those payouts are only permitted if you don't have another retirement plan in place, and the IRS looks at the entire period from the termination date until 12 months after the last account is paid out. Open a replacement plan inside that window and the payouts your employees already took were never allowed in the first place.

Cleaning that up is expensive. Employees who rolled money into an IRA have to unwind it on their own tax returns, and you have a correction to file with the IRS. So you can terminate your plan — you just can't terminate it and start a new one any time soon. Converting avoids all of it.

When Should You Switch 401(k) Providers?

Most sponsors switch for one or more of a handful of reasons. If any of these red flags apply to your plan, it may be time to consider changing providers.

The first one is the most common trigger, and it's worth understanding why it matters so much.

Where the High Fees Usually Are

As a plan fiduciary, you have an obligation to make sure the fees your participants pay are reasonable for the services they receive. That duty exists because fees don't just reduce an account balance — they reduce everything that balance would have earned over a working career. DOL's own illustration makes the point: on a $25,000 balance earning 7% over 35 years, paying 1% more in annual fees leaves a participant with 28% less at retirement — $163,000 instead of $227,000, without a single additional contribution either way.

That cost lands on your employees, which is exactly why it's your responsibility rather than theirs.

Singling out specific providers at the top of this post is based on solid research. In our 2021 study of 104 small business 401(k) plans across 31 providers, 76% were paying hidden administration fees — revenue sharing and wrap charges buried inside investment expenses instead of billed openly. On average those hidden fees made up more than half of what the plan paid for administration, and the weighted average all-in cost was 1.18%.

• • Insurance companies were the worst offenders by a wide margin — nine of the ten highest-priced providers in the study. They typically deliver a 401(k) through a group annuity contract, meaning mutual funds wrapped in an insurance layer, and that wrapper can add more than 1% on its own, on top of what the underlying funds already charge.
  • Payroll companies sell convenience: one vendor, one invoice, payroll and retirement together. That argument was stronger a decade ago — payroll integration is now a standard offering from independent recordkeepers as well, so you can usually get the automated data feed without also buying your 401(k) from the company that runs your payroll. Bundling makes fees harder to calculate, and a fee you can't isolate is a fee you can't benchmark.
  • Mutual fund companies are the subtle case, because their biggest cost may not be a fee at all. When a provider fills the lineup with its own proprietary funds, you're not only paying those funds' expense ratios — you're accepting their returns, whether or not they're the best option in each asset class. A plan that looks reasonably priced can still cost participants more over a career if the menu underperforms the alternatives.

If you can't answer the question "what does our 401(k) cost?" with a dollar figure, you have no way to judge whether your fees are reasonable — and that judgment is your responsibility. Our fee comparison page publishes more current, plan-by-plan comparisons than the 2021 study above, and it's also where you can request a no-cost comparison for your own plan. The result gives you a number, and something to keep in your fiduciary file.

When Should You Not Switch?

Hold off if:

• • You're mid-audit. Finish it. Splitting an audit across two providers turns a routine engagement into an expensive one.
  • You're in the middle of fixing a plan error. If you have a correction open with the IRS or DOL, finish it first. The provider who created the records is the one who can explain them.
  • An acquisition is pending. Combining two plans changes the analysis entirely. Sort that out before you add a provider change on top of it.
  • You're already in a blackout. Let it finish.
  • The problem is your advisor, not your recordkeeper. These are separate roles and separate fees. If your investment lineup is bad and your service is fine, replacing your advisor is a smaller, faster fix.

Single Employer Plan or Pooled Employer Plan?

Most 401(k) plans are single employer plans — your company is the only employer in the plan, and the plan is yours to run. That's the kind of plan this post has been describing. A pooled employer plan (PEP) is a different structure: one plan, shared by many unrelated companies, run by a firm called a pooled plan provider. Insurance, payroll and mutual fund companies have been marketing PEPs hard to small employers, so you may well be offered one when you go looking for a new provider.

It's worth knowing how a PEP changes the process this post describes — in both directions.

• • Joining a PEP doesn't move your plan. It ends it. Changing providers normally leaves your plan intact: same plan, new company running it. Joining a PEP is not that. Your plan is merged into the pooled plan and stops existing as its own plan. You file a final Form 5500 for it, and from then on your company is one of many participating employers in a plan somebody else sponsors. Your employees keep their account balances and their vesting, and no one is cashed out — but the plan you had is gone.
  • Once you're in a PEP, you can't change providers without leaving the plan. In a single employer plan, a provider who overcharges or underperforms can be replaced, which is what this entire post describes. In a PEP, the pooled plan provider isn't a vendor you hired — it runs the plan. To get away from it you must establish a new single-employer plan and then merge your employees' accounts into it. That is a far bigger undertaking than a conversion.

How Do You Choose a New 401(k) Provider?

ERISA requires you to act in your participants' interest and to pay only reasonable expenses from plan assets. In practice, DOL's guidance boils down to this: survey several providers, ask each the same questions, and write down what you learned and why you chose who you chose. The documentation is the part sponsors skip and the part that matters if anyone ever asks.

Two things worth knowing:

1. 1. There is no legally required RFP frequency. You'll hear "every three to five years" repeated as though it were a rule. It isn't. DOL requires a prudent process and periodic review at reasonable intervals — it doesn't specify a number. What matters is that you can show your work.

   2. You are legally entitled to a written fee disclosure before you sign. Providers must lay out their services, all direct and indirect compensation, and — critically — what they charge you on the way out. Ask for it from the provider you're considering, and from the one you already have. Your current provider's disclosure is the fastest way to find out what leaving will cost.

Questions to Ask Every Provider You're Considering

How Does a 401(k) Conversion Work?

All conversions consist of specific action steps, which are presented below in chronological order. Plan on 60 to 120 days from signed agreement to live plan. Only one step carries a legal deadline — step five — and because it has to be met before participants lose access, it sets the timing for everything after it.

Step 1: Sign the Services Agreement

The conversion clock starts here. Your new provider will send a data request covering plan documents, participant census, payroll files, loan records, and vesting history.

Step 2: Send Written Termination Notice to Your Outgoing Provider

Nearly every provider requires advance notice to terminate — 90 days is the most common, and you pay administration fees throughout the notice period. Send the notice as soon as you've hired your replacement. Your new provider will usually give you a template.

Step 3: Prepare the New Plan Document

Generally the new document mirrors your current terms. This is also a good time to make design changes you've been considering — see "Changes worth considering while your document is open" below for the ones worth a look in 2026.

Step 4: Build the Investment Lineup and Decide Where Existing Balances Go

Your new provider proposes a fund lineup. You then decide what happens to the money already invested under the old one. There are two approaches.

• • Mapping moves each employee's balance into a new fund similar to the one it was in. Nobody has to do anything, and everyone's investment mix stays as it was.
  • Re-enrollment gives every employee a window to choose new investments, and puts anyone who doesn't respond into the plan's default fund. It takes more communication, but it can be a good opportunity to get employees into age-appropriate investments.

Ask your provider to walk you through both.

Step 5: Issue the Blackout Notice

30 to 60 days before participants lose access. This is a legal deadline with a real penalty, and it gates everything after it. Details below.

Step 6: Transfer Assets and Re-enroll Participants

Assets move, the blackout runs, and participants get access to the new platform with new deferral and investment elections.

What Is a 401(k) Blackout Period?

A blackout period is a stretch during a conversion when participants can't direct investments, take loans, or request distributions, because their balances are in transit between providers. For most small plans it runs one to three weeks. How long yours lasts depends on how your investments have to be moved. If your current funds can be transferred to the new provider as they are, the blackout is short. If they have to be sold, the cash wired, and new investments purchased on the other end, it takes longer — and insurance company annuity contracts take longest of all.

Contributions keep coming out of pay during a blackout, and they still have to be deposited on time. The blackout suspends participant direction, not your obligations as the employer.

The Blackout Notice: 30 to 60 Days, and a Real Penalty

Any blackout lasting more than three consecutive business days requires advance written notice, so a conversion essentially always does.

It has to go out at least 30 days and not more than 60 days before participants lose access, and it has to say why the blackout is happening, what's suspended, when it starts and ends, and that participants should review their investments while they still can. Everyone affected gets one, including former employees who still have balances.

Your new provider will draft it. Get that in writing, because the legal obligation is yours, not theirs.

The penalty runs up to $173 per day, per participant. A 40-participant plan that gets its notice out 10 days late is looking at up to $69,200 — for a paperwork miss on a routine conversion.

What Fees Should You Expect When Switching 401(k) Providers?

Two one-time fees, plus whatever your outgoing provider charges to let you go.

Watch for a waived establishment fee. Providers sometimes waive it, and it's worth asking why. More often than not, the annual administration fee is high enough to recover the waiver within a year.

Conversion costs can generally be paid from plan assets if your document permits it and the amount is reasonable — but not every expense qualifies, so confirm with your TPA rather than assuming. Paying a punitive termination fee out of participants' accounts is its own fiduciary problem.

If your plan's assets sit in an insurance company's annuity contract, two separate charges can apply on the way out — and sponsors routinely learn about the second one too late.

What Is a Surrender Charge?

A surrender charge is what an insurance company charges when money leaves its annuity contract before the contract term is up. DOL describes these as fees that "commonly decrease and disappear over time" — and that's the part that matters most. The charge is tied to how long the annuity contract has been in force, not to your recordkeeping relationship, so two plans leaving the same provider on the same day can face completely different numbers.

Because it runs on a schedule, it's knowable in advance. Your provider can tell you today what the charge is this year and what it will be next year. In a contract's early years it can be large enough to change the decision entirely — sometimes the right answer is to wait for the schedule to burn down rather than absorb it. We've written more about surrender charges and other extraordinary insurance company fees separately.

What Is a Market Value Adjustment?

A market value adjustment (MVA) is a separate calculation that changes what your plan receives on an early withdrawal, based on how interest rates have moved since the contract was issued. It exists to protect the insurer: the assets backing your contract were bought at the rates prevailing when you signed, and the MVA passes the gain or loss from rate movement back to you.

The direction follows the rates. If rates have risen since the contract was issued, those backing assets are worth less than they were, and the MVA reduces what you get back. If rates have fallen, the adjustment can work in your favor.

That's the crucial difference from a surrender charge. A surrender charge declines predictably toward zero, so waiting is a reliable strategy. An MVA depends on market conditions on the day you actually leave — it doesn't burn off with time, and you can't know the figure until you ask for a current quote.

Two things make MVAs easy to miss: not every annuity contract has one, and those that do often document it separately from the surrender charge schedule. Ask whether yours applies, by name.

What to Do Before You Decide

• • Get both numbers in writing — the current surrender charge, the schedule showing how it declines, and whether an MVA applies and what it would cost today.
  • Run the payback math. Compare the one-time exit cost against your annual savings. If switching saves $8,000 a year and leaving costs $12,000, you break even in 18 months — often still clearly worth doing, but that's a decision to make with the number in front of you rather than a reason to avoid the conversation.
  • Remember these are contract terms, not service terms. Your recordkeeper can't waive them and your new provider can't absorb them. They're a reason to time the switch carefully, not a reason to stay.

Can You Switch 401(k) Providers Mid-year?

Yes, and plenty of sponsors do. But a January 1 effective date is easier, for a concrete reason: a mid-year switch splits your plan year between two providers. Your new provider has to collect and reconcile everything that happened before the conversion — payroll records, contribution totals, compensation figures — from the provider you just left, and the two have to agree on who completes year-end testing and files the Form 5500. Convert on January 1 and each provider owns one clean, complete plan year.

The cleanest approach for a mid-year switch is to keep sending contributions to your outgoing provider until the blackout begins. That creates a clear breakpoint for handing off annual ERISA compliance.

One important correction to how this is usually described: the provider holding assets at year end doing that year's compliance is market practice, not law. The plan administrator — you, the employer — is legally responsible for nondiscrimination testing and the Form 5500 regardless of who performs the work.

So don't assume. Get it in writing in the services agreement, for both the prior and current plan year. In our experience this is the single most common gap in a provider switch, and it usually surfaces the following summer when a Form 5500 is due and each provider believes the other one is filing it.

Also expect this: some outgoing providers won't speak to your new provider directly. Your new provider will tell you what they need, but you may have to be the one to get it.

Changes Worth Considering While Your Document Is Open

A conversion means your plan document is being rewritten anyway — a good opportunity to revisit design choices that may be costing you money or administrative time. Most small plans should consider the following plan modifications.

Add Roth Contributions (Including Roth Catch-up)

Beginning in 2026, participants who received more than $150,000 in FICA wages from your company in 2025 may make catch-up contributions only on a Roth basis. In a plan that doesn't offer Roth, those participants can't make catch-up contributions at all.

Adding Roth preserves catch-up contributions for your higher-paid employees and requires no change to your employer contributions. The main tradeoff is payroll setup and participant communication.

Remove Hours-based Eligibility Requirements

If your plan uses hours-based eligibility, you have to track long-term part-time employees — those working at least 500 hours in two consecutive years. LTPT eligibility applies to employee deferrals only. It does not require you to extend your match or other employer contributions to those employees.

Removing the hours requirement eliminates LTPT tracking and simplifies administration going forward. It is worth weighing against the cost, because removing the requirement accelerates eligibility for all employees, not only part-timers.

Other Optional SECURE 2.0 Provisions

These are all optional, all require a plan amendment, and all are easiest to adopt while the document is being rewritten:

• • Raise the involuntary force-out threshold to $7,000. Terminated participants with balances up to $7,000 can be forced out of the plan and automatically rolled over to an IRA, up from your plan's current limit. This affects terminated employees only — active employees are unaffected.
  • Set your cash-out limit to $0. A separate election controls how those forced-out balances are paid. Amounts over $1,000 must go to an IRA; amounts of $1,000 or less can be cut as a check, which is what most plans do today. Setting the limit to $0 sends every force-out to an IRA instead — no checks to be lost, left uncashed, or escheated, no mandatory 20% withholding or early-distribution penalty for the participant, and the money stays in the retirement system. The tradeoff is modest: automatic rollover IRAs carry a small setup and annual fee, and a participant who genuinely wants the cash has to ask for it during the notice window.
  • Allow hardship self-certification. Participants may self-certify that they qualify for a hardship distribution, without submitting supporting documentation for you to collect and retain.
  • Add enhanced catch-up contributions for ages 60 through 63. Participants in that age band can contribute at a higher catch-up limit — $11,250 in 2026, compared with $8,000 for other catch-up eligible participants.

What Can Go Wrong? Three Pitfalls to Avoid

A conversion is routine work, but a few issues account for many of the troubles we've seen. And each is avoidable if you raise it with your new provider before the transition starts.

Missing a Deferral Deposit Deadline

Don't stop sending contributions to your outgoing provider until they tell you to. Late deposits are the most common way a smooth conversion turns into a correction you have to report to the government.

The rule is stricter than most sponsors expect. Money withheld from an employee's paycheck has to reach the plan as soon as you can reasonably separate it from your company's own funds. Plans with fewer than 100 participants get up to seven business days, but that is a maximum, not a target — if you normally deposit in two days, two days is the standard you will be held to.

If a deposit is late, you owe your employees the investment earnings they missed, and the late deposit has to be reported on your Form 5500. DOL does offer a simplified way to correct small errors like this, so ask your new provider whether they will handle that filing if a deposit slips during the transition.

A Gap in Annual ERISA Compliance

Get it in writing who is doing your year-end compliance work — the nondiscrimination testing and the Form 5500 filing — for both last plan year and this one. See the mid-year section above for how that usually splits. This is the gap we see most often, and it typically surfaces the following summer, when the Form 5500 is due and each provider assumes the other one is filing it.

A switch also forces someone to actually count your participants, which can change whether your plan needs an independent audit. The count includes only employees with account balances, not everyone who is eligible. That can cut either way: you may find you have needed an audit and weren't getting one, or that you've been paying for one you no longer need.

Records That Never Arrive

Conversions stall when the outgoing provider is slow to hand over records, or hands over incomplete ones. The records that go missing are the ones nobody thinks about until they are needed: how much of each employee's account is vested, who each employee named as their beneficiary, unused money left behind by employees who quit before vesting, and the payment schedules for any outstanding participant loans. Occasionally a prior administrator refuses to release the plan document itself.

The Bottom Line

Switching providers is a manageable process, and your new provider leads most of it. Your role is to manage the handoff with your outgoing provider, get the required notices to your employees on time, and make a handful of decisions along the way.

The part that deserves real thought is which provider you pick. A 401(k) provider that makes leaving expensive has told you something about how it thinks about the people in your plan. Reasonable fees, disclosed in dollars, with no penalty for walking away, is not an unusual thing to ask for — it's what the fiduciary standard was written to protect.

Start by finding out what your plan actually costs, then find out what leaving it costs. Our no-cost fee comparison will show you your all-in fees next to a comparable plan, and your current provider's fee disclosure will tell you what it charges on the way out. If you want a benchmark to measure both against, our own pricing is published — so you can do the math before you call anyone.