401(k) fee comparison calculator

Free tool · Fee-drag illustration

401(k) Fee Comparison Calculator

Fee differences that look tiny on paper compound into life-changing amounts. Compare your old plan’s all-in cost against an alternative.

Compare Two All-In Cost Levels

“All-in cost” means everything: fund expense ratios plus plan administrative charges plus any advisory fee. Your old plan’s numbers are in its annual 404(a)(5) participant fee disclosure — how to find it is explained below.

Your comparison

An assumption you control, not a prediction — the point of the tool is the difference between the two options, which holds at any growth rate.

Difference after the period shownkept by you, not paid in fees
Option A
Option B

Projection method: balance × (1 + growth − fees)years, the same simple illustration the Department of Labor uses in its fee guidance. Actual investment returns vary and are not guaranteed — but the fee drag itself is contractual and certain.

Why One Percent Matters

The Department of Labor’s own illustration: a $25,000 balance left for 35 years earning 7% before fees ends at about $227,000 with 0.5% annual fees — but only $163,000 with 1.5% fees. The single extra percentage point consumes 28% of the final balance.

$80,796What the same one-point difference (0.5% vs 1.5%) costs on a $100,000 balance over 25 years at 6% growth — the default example in the calculator above.
404(a)(5)The annual fee disclosure every 401(k) must send participants. It lists each fund’s expense ratio and the plan’s administrative charges — the numbers to type into this tool.
Both directionsFees are an argument for comparing, not for always leaving. Large-employer plans often have institutional pricing cheaper than retail IRAs — some rollovers raise costs.

How to Find What You’re Actually Paying

In your old 401(k)

Look for the “Annual Fee Disclosure” or “404(a)(5) notice” on the plan’s website (often under Documents or Statements), or request it from the plan administrator — they’re required to provide it. Note each fund’s expense ratio, the administrative fee (flat dollars or a percentage), and any per-participant charges billed to former employees.

In a proposed IRA

Ask for — in writing — the account maintenance fee, the expense ratios of the actual funds proposed, any advisory or wrap fee as a percentage, and transaction commissions. If an advisor recommends the rollover, ask how they’re compensated; they’re required to tell you.

Fee Questions

What counts as the “all-in” cost?

Everything that comes out of your balance every year: fund expense ratios, plan administrative/recordkeeping fees, advisory or wrap fees, and (in some plans) per-head charges to former employees. Trading commissions and one-time transfer fees matter too but are usually small next to recurring percentages.

Is an IRA always cheaper than a 401(k)?

No. Index funds inside an IRA can cost under 0.1%, but a managed IRA with a 1% advisory fee is often more expensive than a decent employer plan, whose institutional share classes can beat retail pricing. That’s why the comparison has to use your actual numbers from both sides — not assumptions.

My old plan charges former employees extra. Is that legal?

Generally yes — plans may pass administrative costs to separated participants that the employer subsidized for active ones. It shows up in the 404(a)(5) disclosure and is a legitimate factor favoring a rollover when the charge is meaningful.

Is this calculator predicting my investment returns?

No. The growth rate is your assumption, and the tool applies it identically to both options — what it isolates is the fee drag, which is contractual. At higher or lower growth the dollar difference changes, but the cheaper option always finishes ahead by roughly the compounded fee gap.

Related Tools & Guides

401(k) to IRA Rollover Guide

Fees are one factor of several — see the full side-by-side comparison.

Read the guide →

Rollover Options Checker

See which destinations are typically open for your account.

See your options →

Old 401(k) Review

We’ll pull the fee disclosures with you and put the numbers side by side.

Read the guide →

Sources

  • U.S. Department of Labor, A Look at 401(k) Plan Fees — the 1%-over-35-years illustration (0.5% → ~$227,000 vs 1.5% → ~$163,000 on $25,000)
  • 29 CFR §2550.404a-5 — required annual participant fee disclosures
About this illustration: Educational only. The growth rate is a user-chosen assumption; investment returns are not guaranteed and can be negative. The tool compares fee drag under identical assumptions — it does not recommend any account, provider, or investment. Not investment advice.
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