Investing 101
Everything you need to know to start investing. From choosing a broker to understanding account types, this guide breaks down the essentials so you can put your money to work.
Why Invest?
The cost of not investing and the power of starting early
Money sitting in a checking account loses purchasing power every year. At ~3% average inflation, $10,000 today buys only ~$7,400 worth of goods in 10 years.
*At 3% average annual inflation
The S&P 500 has returned roughly 10% annually since its inception (about 7% after inflation). Despite crashes and recessions, the long-term trend has always been up.
$500/month invested at 7% real return:
$79k
10 years
$264k
20 years
$661k
30 years
Time in the market beats timing the market. The best day to start was yesterday. The second best day is today.
Account Types
Where to invest — understanding tax-advantaged vs taxable accounts
The “account type” is the container that holds your investments. The same ETF can be held in a 401(k), Roth IRA, or brokerage account — what changes is how taxes work.
Employer-Sponsored Retirement
Tax-deferred (Traditional) or tax-free growth (Roth)
$23,500/year (2025)
The Best Account for Beginners
Tax-free growth + tax-free withdrawals
$7,000/year (2025)
Tax-Deductible Retirement Savings
Tax-deductible contributions, tax-deferred growth
$7,000/year (2025)
Flexible Investing With No Restrictions
No special tax treatment — capital gains taxes apply
No limit
Recommended Account Priority Order:
- 1401(k) up to employer match (free money)
- 2Max out Roth IRA ($7,000)
- 3Max out 401(k) ($23,500)
- 4HSA if eligible ($4,300 single / $8,550 family)
- 5Taxable brokerage account (no limit)
*2025 contribution limits. Adjust based on your specific situation.
What to Buy
ETFs, index funds, and building a simple portfolio
An Exchange-Traded Fund (ETF) is a basket of stocks or bonds bundled into a single investment. When you buy one share of an S&P 500 ETF, you own a tiny piece of 500 companies.
Why ETFs are perfect for beginners:
- Instant diversification — one purchase spreads risk across hundreds of companies
- Ultra-low fees — index ETFs charge 0.03%-0.20% per year
- No stock picking — the fund automatically tracks the index
- Trade like a stock — buy/sell during market hours at market price
Study after study shows that index funds outperform the vast majority of actively managed funds and stock-pickers over the long term.
Index Fund (e.g., VTI)
- Low risk (diversified)
- Low effort
- Low fees (~0.03%)
- Beats 90% of pros over 20yr
Individual Stocks
- High risk (concentrated)
- Requires research
- Trading fees add up
- Most underperform the index
Warren Buffett's advice: “Consistently buy an S&P 500 low-cost index fund. Keep buying it through thick and thin, and especially through thin.”
Popular ETFs for Beginners
Vanguard Total Stock Market
Entire US stock market (~4,000 stocks). The most popular choice for FIRE investors.
Vanguard S&P 500
500 largest US companies. Slightly less diversified than VTI but very similar returns.
Vanguard Total International
Stocks from developed and emerging markets outside the US. Adds global diversification.
Vanguard Total World Stock
One fund for everything — US + international stocks in a single ETF.
Vanguard Total Bond Market
US investment-grade bonds. Adds stability, reduces portfolio volatility.
Schwab US Dividend Equity
High-quality dividend-paying US stocks. Popular for income-focused investing.
*Expense ratios as of 2025. Not financial advice — do your own research before investing. Fidelity and Schwab offer equivalent ETFs with similar or identical expense ratios.
You don't need a complicated strategy. These simple portfolios have outperformed most professional fund managers:
The One-Fund Portfolio
Simplest possible
One fund, global diversification. Done.
The Two-Fund Portfolio
Classic FIRE approach
Tilted toward US with international exposure.
The Three-Fund Portfolio
Boglehead classic
Balanced with bonds for stability.
Target-date funds are another great “set and forget” option, especially in a 401(k). They automatically adjust your stock/bond mix as you approach retirement. Look for the year closest to when you turn 65 (e.g., “Target Retirement 2055”).
Choosing a Brokerage
Where to open your accounts — all three are excellent choices
A brokerage is just the platform where you open accounts and buy investments. The three below are the gold standard — all offer commission-free trading, excellent mobile apps, and no account minimums.
Best All-Around
- Zero-fee index funds (FZROX, FZILX)
- Fractional shares on all stocks & ETFs
- Excellent 401(k) provider
- Cash management account (2%+ APY)
- HSA available
Great for Banking + Investing
- Schwab Intelligent Portfolios (robo-advisor)
- No foreign transaction fees (debit card)
- ATM fee rebates worldwide
- Excellent customer service
- Merged with TD Ameritrade
The Pioneer of Index Investing
- Created the first index fund (1976)
- Investor-owned structure (low fees)
- VTI, VOO, VXUS — the gold standard
- Best for buy-and-hold investors
- Newer app & UI (recently modernized)
Bottom line: All three brokerages are excellent. The best one is whichever you'll actually use. If your employer's 401(k) is with Fidelity, it may be convenient to keep your IRA there too. Don't overthink it — the important thing is to start investing, not which app you use.
Getting Started
A step-by-step checklist to make your first investment
Open a Roth IRA
If you don't have one yet, open a Roth IRA at Fidelity, Schwab, or Vanguard. Takes about 15 minutes online. You'll need your SSN, bank account for transfers, and a government ID.
Set Up Automatic Transfers
Connect your bank account and set up recurring transfers (weekly or per-paycheck). Even $50/week adds up to $2,600/year. Automating removes the temptation to skip.
Buy a Total Market ETF
Start with VTI (total US market) or VT (total world market). Buy however much your transfer covers. Fractional shares mean you can invest with any amount.
Don't Check It Every Day
Set it and forget it. The market goes up and down daily — that's normal. What matters is the long-term trend. Check quarterly at most. Resist the urge to sell during dips.
Increase Contributions Over Time
Every time you get a raise, increase your investment amount. Aim to save at least 20% of your income. If you're pursuing FIRE, target 50%+.
Waiting for the 'right time' to invest
Time in the market beats timing the market. Start now with whatever you have.
Picking individual stocks or crypto
Broad index funds are safer and outperform most stock-pickers over time.
Paying high fees (1%+ expense ratios)
Index ETFs charge 0.03-0.20%. A 1% fee difference costs $100k+ over 30 years.
Selling during market downturns
Every major crash has recovered. Stay the course. Downturns are buying opportunities.
Not getting employer 401(k) match
It's literally free money. Contribute at least enough to get the full match.
Investing before building an emergency fund
Save 3-6 months of expenses first, so you're never forced to sell investments.
Key Terms Glossary
Quick reference for common investing terminology
Expense Ratio
Annual fee charged by a fund, expressed as a percentage. VTI charges 0.03% — that's $3 per $10,000 invested per year.
Diversification
Spreading investments across many stocks/bonds to reduce risk. If one company fails, you barely notice.
Dollar-Cost Averaging (DCA)
Investing a fixed amount regularly regardless of market price. Automatically buy more shares when prices are low.
Capital Gains
Profit when you sell an investment for more than you paid. Long-term (held 1+ year) gets lower tax rates.
Dividend
A payment from a company to shareholders, usually quarterly. Reinvesting dividends accelerates compound growth.
Rebalancing
Adjusting your portfolio back to target percentages (e.g., 80/20 stocks/bonds) when market movements shift the ratio.
Tax-Loss Harvesting
Selling investments at a loss to offset capital gains taxes. The loss reduces your tax bill while you reinvest in a similar fund.
HYSA
High-Yield Savings Account. Pays 4-5% APY (vs 0.01% at big banks). Use for emergency fund and short-term savings, not long-term investing.
This guide is for educational purposes only and is not financial advice. Investment decisions should be based on your individual circumstances, risk tolerance, and financial goals. Past performance does not guarantee future results. Consider consulting a licensed financial advisor for personalized recommendations.
Ready to Put Your Money to Work?
Track your investments, calculate your FIRE number, and see how your savings grow over time.