Costs, Fees & Taxes

Introduction

Fees and taxes quietly reduce your returns. Over decades, even small costs can compound into large losses. This lesson shows where costs come from and why they matter.

Types of Costs

• Commissions — per-trade fees charged by the broker
• Spreads — the bid/ask gap you cross on each trade
• Management fees — for funds/ETFs (the expense ratio)
• Platform/account fees — monthly or annual charges
• Currency conversion — if trading in a foreign currency

Expense Ratios on Funds

Index funds and ETFs charge an expense ratio — a small annual percentage. A cheap fund (0.05–0.20%) costs far less over time than an active fund at 1%+.

The Compounding Effect of Fees

Because fees are taken out every year, they compound against you:

$10,000 for 30 years
0.25% fees  -> leaves you noticeably more
1.50% fees  -> eats a large chunk of growth

The difference of 1% a year, compounded over decades, is substantial.

Taxes on Investments

Investment taxes vary by country and asset type. Common types include:

• Capital gains tax — tax on profit when you sell at a gain
• Dividend tax — tax on dividend income
• Stamp duty / transaction taxes — on some trades
• Tax-advantaged accounts (e.g., ISA, 401(k)) may reduce or defer this

Practical Advice

• Read the fee schedule before you open an account
• Prefer low-cost index funds/ETFs
• Keep trading frequency reasonable (fewer trades = fewer costs)
• Understand your local tax rules or ask a professional
• Strategies that minimize taxes legally (e.g., long-term holding, tax-free accounts) help a lot

Summary

• Costs include commissions, spreads, and management fees
• Low fees compound into big savings over time
• Taxes (capital gains, dividends) vary by country and asset
• Prefer low-cost funds and reasonable trading frequency
• Consider tax-advantaged accounts where available

Next Lesson

Finally, let's put it all together into a real investment plan.