Money & Taxes
Investing isn't just for rich people or Wall Street bros. If you have $25/month and a phone, you can start building wealth right now. Here's how.
// Why Invest at All?
Money in a savings account earns about 0.5-4% per year. Inflation averages about 3%. That means your savings are barely keeping up or actively losing value over time.
Money invested in a diversified stock market index fund has historically earned about
7% per year after inflation (10% before inflation). Over decades, that difference is enormous.
$200/month in savings at 3%: $55,000 in 15 years
$200/month invested at 7%: $63,000 in 15 years
$200/month invested at 7%: $197,000 in 30 years
See it in action with our
Compound Interest Visualizer.
Open a Roth IRA, buy a total stock market index fund, set up automatic monthly contributions, and don't touch it for decades. That's the whole strategy. Everything below explains why and how.
// Where to Put Your Money
These are containers for your investments. The account type determines how your money is taxed. Tap each one to learn more.
// Account Comparison
| Feature | Roth IRA | Traditional IRA | 401(k) | Brokerage |
|---|
| Tax on contributions | You pay now | Tax-deductible | Tax-deductible | You pay now |
| Tax on growth | Tax-free | Tax-deferred | Tax-deferred | Taxed yearly |
| Tax on withdrawal | Tax-free | Taxed as income | Taxed as income | Capital gains tax |
| Employer match | No | No | Yes (free money!) | No |
| 2025 contribution limit | $7,000/yr | $7,000/yr | $23,500/yr | No limit |
| Withdraw contributions early? | Yes, penalty-free | 10% penalty | 10% penalty | Yes, anytime |
| Income limit | $161K single | None | None | None |
| Best for | Young people | High earners | Employer match | After maxing IRA |
// The 401(k) Match — Free Money Calculator
If your employer matches your 401(k) contributions, not contributing enough to get the full match is literally leaving free money on the table. See how much.
// What to Actually Buy
An index fund owns a tiny piece of hundreds or thousands of companies at once. Instead of picking individual stocks and hoping you're right, you own the entire market. When the market goes up, you go up. When it dips, you dip — but historically it always recovers and keeps growing.
Why index funds beat stock picking: Over any 20-year period, roughly 90% of professional fund managers fail to beat the S&P 500 index. These are people with PhDs in finance, Bloomberg terminals, and research teams. If they can't beat the index, you definitely can't by picking stocks on Reddit.
The cost advantage: Index funds charge tiny fees (0.03-0.20% per year). Actively managed funds charge 0.5-1.5%. That 1% difference sounds small, but over 30 years it can cost you hundreds of thousands of dollars.
VTI / VTSAX — Vanguard Total Stock Market Index. Owns a piece of virtually every publicly traded U.S. company. One fund, instant diversification. Expense ratio: 0.03%. This is the "just buy this" fund.
VXUS / VTIAX — Vanguard Total International Stock. Same idea but for companies outside the U.S. Adds global diversification.
BND / VBTLX — Vanguard Total Bond Market. Lower risk, lower return. Smooths out volatility. Young people need very little of this (10% or less).
Or just buy a Target Date Fund — Vanguard, Fidelity, and Schwab all offer "Target Date 2060" or "Target Date 2065" funds. You pick the year closest to when you'll retire, and the fund automatically adjusts the stock/bond mix as you age. It's the ultimate set-and-forget option. One fund, done.
Mutual Fund (VTSAX): You buy at the end of the trading day at one price. Often has a minimum investment ($1,000-$3,000). Fractional shares automatic.
ETF (VTI): Trades like a stock throughout the day. No minimum investment — buy as little as one share (~$250) or fractional shares on most brokerages. Same underlying investments as the mutual fund version, just a different wrapper.
For beginners: ETFs are usually easier because there's no minimum. VTI and VTSAX hold the same stocks. Pick whichever your brokerage makes easiest.
// The Expense Ratio Tax — How Fees Eat Your Returns
That "small" percentage fee compounds against you every year. See the real cost over time.
// Dollar-Cost Averaging — Why "When" Doesn't Matter
"I should wait for the market to dip before investing" — this is the most common mistake beginners make. It's called timing the market, and even professionals can't do it consistently.
Dollar-cost averaging (DCA) means investing the same amount on a regular schedule regardless of what the market is doing. $200 on the 1st of every month, no matter what.
When prices are high, your $200 buys fewer shares. When prices are low, your $200 buys more shares. Over time, you get a good average price without ever trying to predict the market.
The data: Studies consistently show that investing a lump sum immediately outperforms waiting for a dip about 67% of the time. Time in the market beats timing the market. Just start.
// Mistakes That Cost Young Investors Thousands
You can start with $25/month. Fidelity, Schwab, and many others have no minimums. The amount doesn't matter — the habit and the time do. $50/month from age 20 to 65 at 7% = $190,000+.
That hot tip from TikTok? Your friend's "guaranteed" play? In any given year, most individual stocks underperform the index. Over 10 years, the failure rate is devastating. Buy the index and own ALL the winners automatically.
The market drops 20-30% every few years. It has recovered every single time in history. If you sell during a dip, you lock in your losses. If you hold (or better, buy more), you get the recovery. The people who lost money in 2008 are the ones who sold. Those who held were fine within a few years.
A 1% expense ratio doesn't sound like much, but over 30 years it can cost you 25-30% of your total returns. Check the expense ratio before buying any fund. If it's over 0.20%, there's almost certainly a cheaper alternative. Use the calculator above to see the real cost.
If your employer matches 50% of your contributions up to 6% of salary, and you only contribute 3%, you're leaving half the free money on the table. Always contribute at least enough to get the full match. It's a 50-100% instant return on your money — no investment in history beats that.
When you leave a job, you can roll your 401(k) into an IRA with zero tax penalty. If you cash it out instead, you pay income tax PLUS a 10% early withdrawal penalty. On a $10,000 balance, that's $3,000-$4,000 gone instantly. See our
Laid Off guide for how to handle this.
// Jargon Decoder
Expense Ratio
The annual fee a fund charges, expressed as a percentage. 0.03% means you pay $3/year per $10,000 invested. Index funds are cheap (0.03-0.20%). Actively managed funds are expensive (0.5-1.5%). This fee is deducted automatically — you never see a bill.
Vesting
How much of your employer's 401(k) match you get to keep if you leave. Some companies vest immediately (you keep 100% right away). Others vest over 3-6 years (e.g., 20% per year). YOUR contributions are always 100% yours. Only the employer match may have a vesting schedule.
Capital Gains
Profit from selling an investment. Short-term (held less than 1 year) is taxed as regular income (high). Long-term (held over 1 year) gets a lower tax rate (0-20% depending on income). This is why you hold, not trade. In a Roth IRA, capital gains are tax-free.
Dividend
A payment companies make to shareholders from their profits. Some stocks pay dividends quarterly. In an index fund, dividends are automatically reinvested to buy more shares. In a Roth IRA, dividend reinvestment is tax-free.
Diversification
Not putting all your eggs in one basket. Owning one stock is risky — it could go to zero. Owning an index fund with 3,000+ stocks means no single company can wipe you out. If one company fails, the other 2,999 carry you.
Dollar-Cost Averaging
Investing a fixed amount on a regular schedule regardless of price. When prices are high, you buy fewer shares. When prices are low, you buy more. Over time you get a good average cost without trying to time the market.
Bull vs. Bear Market
Bull market = prices going up (optimism). Bear market = prices dropping 20%+ (fear). Bear markets happen every few years and last an average of 9-16 months. Bull markets last years. The correct response to a bear market at your age: keep investing. Everything is on sale.
Brokerage
The company that holds your investment account. Think of it like a bank, but for investments. Major brokerages: Fidelity, Charles Schwab, Vanguard. All three are excellent, have no account minimums, and charge $0 to buy/sell ETFs. Pick one and go.
// Common Questions
Step 1: Build a small emergency fund first. $500-$1,000 in a savings account before you invest anything. You don't want to sell investments to cover a flat tire.
Step 2: If your employer offers a 401(k) match, contribute enough to get the full match. This is free money. Do this before anything else.
Step 3: Open a Roth IRA. Fidelity, Schwab, or Vanguard. Takes 15 minutes online. You need to be 18 (or have a custodial account through a parent).
Step 4: Buy a target date fund or VTI. If you want zero decisions: target date fund (pick 2060 or 2065). If you want slightly more control: VTI (total stock market).
Step 5: Set up automatic monthly contributions. Even $25/month. The amount matters less than the consistency. Automate it so you never have to think about it.
Step 6: Don't touch it. Don't check it daily. Don't panic when it drops. Don't try to time the market. The money is working for you 24/7. Let it work.
That's it. If you do this at 18-22 and keep going, you will very likely be a millionaire by retirement. Not from a huge salary — from time and consistency.
Sources: Vanguard, Fidelity, S&P Dow Jones Indices (SPIVA Scorecard), IRS contribution limits (2025), Securities and Exchange Commission (SEC) investor education. Historical returns based on S&P 500 data. Past performance doesn't guarantee future results. This is educational — not financial advice. Consult a fiduciary financial advisor for personalized guidance.