Updated 2026-03-20

401(k) Fees Explained: Admin, Investment, and Hidden Costs

Types of 401(k) fees and how to read your fee disclosures. Admin fees, expense ratios, wrap fees, and revenue sharing.

What You Will Learn

This guide covers everything you need to know about 401(k) fees explained: admin, investment, and hidden costs. We break down the rules, compare your options, and provide tools to help you make informed decisions about your retirement savings.

Enable JavaScript for the full interactive experience with calculators, live data, and tools.

Pavlo Pyskunov

Pavlo Pyskunov

Managing Director & Investment Fund Director

Pavlo Pyskunov analyzes employer-sponsored retirement plans using IRS publications and DOL Form 5500 filings, helping workers maximize their 401(k) savings through data-driven guidance.

Last updated: 2026-03-20

Related Articles

401(k) Fee Calculator: Hidden Cost Impact

See how 401(k) fees erode your retirement savings. Expense ratio analyzer, fee comparison tool, and 30-year cost proj...

401(k) Expense Ratios: What's a Good Fee & How to Find Yours

What a good 401(k) expense ratio looks like, how to find hidden fees, 2026 benchmarks, and the long-term cost impact ...

The Fiduciary Rule and Your 401(k) Fees

Plain-language guide to fiduciary standards. How fiduciary rules affect your 401(k) fees, investments, and advisor ob...

How to Invest Your 401(k): Best Investment Options for 2026

How to invest your 401(k): target-date funds, index funds, ETFs, and expense ratios. Pick the right investments for y...