An AUM (Assets Under Management) fee is charged as a percentage of your total portfolio value, typically assessed quarterly. If your advisor charges 1% AUM and your portfolio is $500,000, you pay roughly $5,000 per year. As your portfolio grows, so does the dollar amount of the fee.

A wrap fee is a comprehensive charge that bundles advisory fees, trading costs, and fund management into a single percentage. Wrap accounts typically charge 1–3% of assets annually. While convenient, they can be expensive if you trade infrequently and would otherwise pay lower separate fees.

Are flat fees better than AUM fees?

It depends on your portfolio size. Flat fees (e.g., $3,000/year) represent a smaller percentage as your portfolio grows, making them more efficient for larger portfolios. For smaller portfolios, a flat fee may represent a higher effective rate than a 1% AUM fee. Calculate both to compare.

What fees do index funds charge?

Index fund expense ratios range from 0.02% to 0.20% for broad market funds. The lowest-cost index funds from providers like Vanguard, Fidelity, and Schwab charge 0.03–0.05%. These are dramatically cheaper than actively managed funds that typically charge 0.50–1.50%.

How do fees affect compounding?

Fees reduce your portfolio balance each year, and you lose not only the fee amount but also the future returns that money would have earned. This compounding loss is called fee drag. Over 30 years, 1% in annual fees can reduce your final portfolio value by 25–30% compared to a no-fee scenario.

Should I pay more for active management?

Research consistently shows that most actively managed funds underperform their benchmarks after fees. Only about 10–20% of active managers beat their index over 15+ year periods. For most investors, low-cost index funds provide better net returns than expensive active management.

Are per-trade commissions still common?

Most major online brokers eliminated stock and ETF trading commissions in the late 2010s and early 2020s. However, commissions still exist for options ($0.50–0.65 per contract), mutual fund transactions ($20–50 per trade at some brokers), and some international trades. These costs add up for active traders.

How do I find out what fees I am paying?

Check your brokerage statements for advisory fees and commissions. Look up fund expense ratios on Morningstar or the fund provider's website. Review your advisor's Form ADV Part 2, which discloses their fee schedule. Many investors are surprised to discover total costs of 1.5–2.5% when all layers are combined.

Investment Fee Calculator

Free investment fee calculator. Compare the lifetime cost of different fee structures including flat fees, AUM percentages, per-trade commissions, and wrap fees.

Portfolio Value

Expected Annual Return

Time Horizon (Years)

Annual Contribution

AUM Fee

Flat Annual Fee

Wrap Fee

No Fees

$2,713,716.00

1% AUM Fee

$2,110,787.00

-$602,930.00 lost

$3,000.00 Flat Fee

$2,523,969.00

-$189,747.00 lost

1.5% Wrap Fee

$1,859,817.00

-$853,899.00 lost

Fee Impact Over 25 Years

Fee Structure	Final Value	Total Fees Paid	Wealth Lost	% of Wealth Lost
No Fees	$2,713,716.00	$0.00	—	—
1% AUM Fee	$2,110,787.00	$290,648.00	$602,930.00	0.22%
$3,000.00 Flat Fee	$2,523,969.00	$75,000.00	$189,747.00	0.07%
1.5% Wrap Fee	$1,859,817.00	$404,542.00	$853,899.00	0.31%

Planning notes, formulas, and examples

About the Investment Fee Calculator

The Investment Fee Calculator reveals the true lifetime cost of different fee structures on your portfolio. Whether you pay a flat annual fee, a percentage of assets under management (AUM), per-trade commissions, or a wrap fee, this calculator shows how those costs compound over decades and eat into your returns.

Fees are one of the few variables investors can control. While you cannot predict future market returns, you can choose lower-cost options that keep more of your money working for you. Even a seemingly small difference of 0.5% in annual fees can cost tens of thousands of dollars over a 30-year investment horizon due to the compounding effect of lost returns.

This calculator lets you compare up to three fee structures side by side, showing the total fees paid and final portfolio value under each scenario. The visual impact of seeing how fees erode wealth over time motivates investors to scrutinize costs and choose efficient investment platforms.

When This Page Helps

Many investors underestimate the long-term impact of fees because the annual charge looks small. A 1% AUM fee on a $500,000 portfolio costs $5,000 in the first year alone, and the compounding loss of that $5,000 plus all its future returns adds up dramatically. This calculator turns abstract percentages into concrete dollar amounts so you can make informed decisions about advisors, funds, and platforms.

How to Use the Inputs

Enter your starting portfolio value.
Enter your expected annual return before fees.
Enter your investment time horizon in years.
For each fee structure, enter the relevant fee rate or amount.
Optionally enter annual contributions to see their impact.
Compare the final portfolio values and total fees paid across structures.
Choose the structure that minimizes fees for your situation.

Formula used

AUM Fee Model: FV = Σ from year 1 to N of [(Balance + Contribution) × (1 + Return – AUM Fee)]
Flat Fee Model: FV = Σ from year 1 to N of [(Balance + Contribution) × (1 + Return) – Flat Fee]
Per-Trade Model: FV = Σ from year 1 to N of [(Balance + Contribution) × (1 + Return) – (Trades × Commission)]
Fee Drag = No-Fee FV – With-Fee FV

Example Calculation

Result: 1% AUM costs $348,000 vs. $75,000 for $3K flat fee over 25 years

Starting with $500,000 at 7% annual return over 25 years: with no fees the portfolio grows to $2.71M. A 1% AUM fee reduces it to $2.16M, costing $553K in fees (the difference is due to lost compounding on fees paid). A $3,000 flat annual fee reduces it to $2.56M, costing only $75K. The AUM fee costs over 4.6 times more because it scales with portfolio size.

Tips & Best Practices

Even 0.25% in fee savings compounds to a significant amount over 20+ years.
AUM fees grow as your portfolio grows, making them increasingly expensive over time.
Flat fees benefit larger portfolios; AUM fees favor smaller portfolios where the dollar cost is low.
Factor in fund expense ratios on top of advisory fees for the total cost picture.
Negotiate fees with your advisor; many will reduce rates for larger accounts or long-term clients.
Compare the all-in cost including expense ratios, advisory fees, trading costs, and platform charges.
Robo-advisors often charge 0.25–0.50% AUM, far less than traditional advisors at 1.0–1.5%.

The Compounding Cost of Fees

Investment fees may look small in percentage terms, but their long-term impact is enormous due to compounding. A $100,000 portfolio growing at 7% for 30 years reaches $761,000 with no fees. At 1% annual fees, it reaches only $574,000—a difference of $187,000 that went to fees and lost compounding. That 1% fee actually consumed 25% of your potential wealth.

Comparing Fee Structures

The optimal fee structure depends on your portfolio size, trading frequency, and service needs. AUM fees align advisor incentives with portfolio growth but become expensive for large accounts. Flat fees offer predictability and favor larger portfolios. Per-trade commissions suit buy-and-hold investors who trade rarely. Evaluate each against your specific situation rather than assuming one structure is always best.

What to Do About Fees

Start by auditing your total investment costs: advisory fees, fund expense ratios, trading commissions, and platform charges. Then compare alternatives. Consider low-cost index funds instead of actively managed funds, fee-only advisors instead of commission-based ones, and robo-advisors as a cost-effective middle ground. Every 0.25% you save translates to real dollars compounding in your favor for decades.

Sources & Methodology

Last updated: March 28, 2026

Methodology

This page runs parallel annual simulations for several fee structures: no fees, a percentage-of-assets advisory fee, a flat annual fee, and a wrap-fee percentage. Each scenario adds any annual contribution, applies the gross return assumption, subtracts the scenario's fee for that year, and then compares final value, total fees paid, and wealth lost relative to the no-fee baseline.

The page is an educational cost-comparison worksheet. It does not model tiered advisory schedules, tax drag, bid-ask spreads, mutual-fund expense ratios on top of advisory fees, or more frequent fee billing, so it should be used to compare fee structures directionally rather than to quote an exact advisory contract cost.

Sources

Understanding Fees (Investor.gov / U.S. Securities and Exchange Commission) — Investor.gov overview describing common account, transaction, and advisory fee structures.
How Fees and Expenses Affect Your Investment Portfolio – Investor Bulletin (Investor.gov / U.S. Securities and Exchange Commission) — SEC investor bulletin emphasizing how recurring fees reduce long-term portfolio growth.

Frequently Asked Questions

An AUM (Assets Under Management) fee is charged as a percentage of your total portfolio value, typically assessed quarterly. If your advisor charges 1% AUM and your portfolio is $500,000, you pay roughly $5,000 per year. As your portfolio grows, so does the dollar amount of the fee.