🕑 16 min read  ·  ✅ Fact-checked  ·  📋 Sources: IRS, CFPB, SEC

Most immigrants who finally open a brokerage account do so with excitement and good intentions, and then proceed to commit a predictable set of mistakes in the next twelve months that quietly cost them thousands of dollars. These mistakes are not signs of stupidity or carelessness. They are the standard pattern that new investors fall into everywhere, made more painful for immigrant families because the lost money represents a larger share of total wealth and time.

This article walks through the seven most expensive first-year mistakes, with the real numbers each one tends to cost a $10,000 starter portfolio, plus the exact correction for each. If you can avoid all seven, your first year of investing will outperform the typical new investor by a margin that compounds for decades.

Mistake 1: keeping the brokerage in “cash” instead of investing it

The single most common first-year mistake is deceptively simple. The investor opens an account, deposits money, and then never actually buys anything. The money sits in the cash account, earning almost nothing, while the investor “researches” what to buy. Days turn into weeks, weeks into months. Six months later the cash is still cash.

The cost is the opportunity cost of the market return foregone. If the S&P 500 returns 8 percent over the year and the investor’s $10,000 sat in a brokerage cash account earning 1 percent, the lost return is roughly $700. If the cash sits for two years, the cost is closer to $1,500. If it sits for three years while the investor keeps “thinking about it,” $2,500 is gone.

The fix: invest the cash within seven days of deposit. Buy a single broad-market ETF — VTI, SCHB, or FZROX — for the entire balance. Set up automatic recurring purchases of the same ETF for future deposits. The decision of which fund to buy can be refined later; what cannot be recovered is the time the money sat in cash. Done is better than perfect.

Mistake 2: trying to pick individual stocks instead of buying the market

This mistake is encouraged by every social media platform, every financial news channel, and every coworker who tells you about the stock that doubled last month. The investor abandons the boring index fund and starts trying to pick individual stocks — usually the ones that have already gone up the most, which by then are the most likely to underperform.

Multiple studies, including data from DALBAR’s annual Quantitative Analysis of Investor Behavior, show that the average individual investor underperforms the S&P 500 by 1 to 4 percent per year over the long term, largely because of poor stock-picking and bad timing decisions. On a $10,000 portfolio, that gap is $100 to $400 per year. Over twenty years, it compounds to $30,000 or more.

The fix: accept that beating the market consistently is extremely difficult, even for full-time professionals with billion-dollar research budgets. A low-cost index fund such as VTI captures essentially the entire U.S. market at a fee of 0.03 percent per year. Owning it requires no skill, no time, and no luck. It is the closest thing to a guaranteed above-average return that exists, because the “average” investor return is, mathematically, slightly below the index average due to fees and behavior.

Mistake 3: panic-selling at the first big market drop

Statistically, the U.S. stock market drops 10 percent or more roughly once every twelve to eighteen months. New investors, watching the value of their newly opened account go down, almost always feel the urge to “do something.” Many of them sell to “wait it out” and then never get back in until the market has fully recovered and prices are higher than where they sold.

The cost of one panic-sell during a 15 percent correction, on a $10,000 portfolio, is typically $1,500 to $3,000 — not from the drop itself (which would have recovered), but from selling low and then buying back high after the recovery. Repeated over a career, this pattern is the single largest reason most retail investors significantly underperform the market.

The fix: write down, before any market drop happens, the following sentence: “I will not sell during a downturn. I will continue my automatic monthly deposits. I will check the account no more than once per month.” Tape it next to the computer where you log into your brokerage. The pre-commitment, made in calm times, is the single strongest defense against panic in stressful times.

Mistake 4: chasing yesterday’s hot fund or asset

The closely related mistake is to abandon the diversified index fund strategy when something else has been doing better recently. Cryptocurrency in late 2021. Cannabis stocks in 2018. Tech-heavy funds in 1999. Each of these had its moment, and each of those moments was followed by significant declines that destroyed the wealth of investors who arrived late.

Performance chasing is well-documented and well-understood. By the time a sector or asset class is on the cover of financial magazines, prices already reflect most of the optimism. Buying then locks in a high entry price and exposes the investor to most of the downside when sentiment turns.

The fix: pick a simple long-term allocation — for example, 80 percent broad U.S. stock market, 20 percent international — and stick to it. When something else is having a great year, your portfolio will look “boring” by comparison. That feeling is the price of the discipline that compounds wealth over decades. Most of the world’s most successful long-term investors have looked boring for most of their careers.

Mistake 5: paying too much in fees without realizing it

Fees in U.S. investing have collapsed in the past decade, but many new investors still end up in high-fee products without realizing it. Some buy mutual funds with 1.0 percent expense ratios when a 0.03 percent ETF would have served the same purpose. Some hire a financial advisor charging 1.0 to 1.5 percent of assets per year for portfolios that did not need active management. Some pay annual account fees or maintenance fees on accounts that have free alternatives.

On a $10,000 portfolio, the difference between 0.05 percent total annual fees and 1.5 percent total annual fees is $145 per year. That sounds small. On a portfolio that compounds to $250,000 over 25 years, the same fee difference reduces the final balance by roughly $80,000.

The fix: before any fund purchase, find the expense ratio (usually listed in the fund’s name or details). Aim for total portfolio expense ratio under 0.10 percent. Before hiring any advisor, calculate the exact annual cost in dollars and ask whether the value justifies it. For most households with portfolios under $250,000, a robo-advisor at 0.25 percent or a self-directed three-fund portfolio is cheaper and equally effective.

Mistake 6: ignoring tax-advantaged accounts in favor of taxable brokerage

New investors often open a taxable brokerage account first and only later discover that the IRS offers powerful tax-advantaged accounts — IRAs, Roth IRAs, and 401(k)s — that should have been their first priority. Years of investment growth in a taxable account that could have been growing in a Roth IRA generate decades of unnecessary tax drag.

The cost depends on income and growth, but for a typical immigrant household earning $40,000 to $60,000, missing a Roth IRA contribution in year one and instead investing that money in a taxable account costs roughly $20,000 to $40,000 over a working career — the additional taxes paid on dividends, capital gains, and eventual withdrawals.

The fix: if you have earned income, open a Roth IRA in addition to or instead of a taxable brokerage account. As of 2026, Charles Schwab and Fidelity both accept ITIN holders for Roth IRA accounts. Contribute up to the annual limit ($7,000 for 2026, $8,000 for those 50 and over). If your employer offers a 401(k) with matching, contribute at least up to the full match before opening any other accounts.

Mistake 7: forgetting to file investment taxes correctly

Investment accounts generate tax forms — 1099-DIV for dividends, 1099-INT for interest, 1099-B for sales — and these must be reported on your federal tax return. New investors sometimes assume that if they did not sell anything, they owe no taxes. This is wrong. Dividends and interest are taxable even if reinvested, and ignoring them creates IRS notices, penalties, and interest charges.

For an immigrant family that is already navigating an unfamiliar tax system, the prospect of an IRS notice is stressful. The actual amounts owed in the first few years are usually small — a $10,000 portfolio paying 2 percent in dividends generates $200 of taxable income, costing perhaps $20 to $50 in federal tax. But the penalty for ignoring it can be 5 percent per month, with interest, plus the long-term risk of compliance problems.

The fix: in January or February following your first investing year, log into your brokerage and download the 1099 forms from the “Tax Documents” section. Provide these to your tax preparer along with your W-2s and other income documents. If you self-prepare with software like TurboTax or H&R Block, the software will prompt you to enter the 1099 information. The actual data entry takes ten minutes. The cost of skipping it can be hundreds of dollars in penalties.

The compounding cost of multiple mistakes

Each mistake above carries a real dollar cost. The frightening reality is that most new investors make several at once. A common pattern: the investor leaves cash uninvested for six months (cost $300), then jumps into individual stocks (cost $200), then panics during a correction (cost $1,500), then chases the hot fund of the year (cost $400), then never opens the Roth IRA they should have (cost $1,800 in foregone tax savings for that year). Total first-year cost: $4,200. And these losses compound — the missing $4,200, growing at 7 percent per year for 30 years, would have become roughly $32,000 in retirement assets.

This is not a hypothetical. It is the average pattern documented in industry studies of new investor behavior. The investors who outperform their peers over decades are not the smartest or the luckiest. They are the ones who avoided the obvious mistakes early and let compounding do the rest.

The simple system that prevents all seven mistakes

The cure for all seven is structural, not motivational. The discipline cannot rely on remembering to do the right thing in stressful moments. It has to be built into the system so that the right behavior is automatic and the wrong behavior is hard.

Step 1: Open a Roth IRA (if you have earned income under the income limits) and a taxable brokerage account at the same broker. Schwab or Fidelity work well for most immigrant investors.

Step 2: Set up automatic monthly contributions to both accounts, dated for the day after your paycheck arrives.

Step 3: Set up automatic purchase of a single broad-market ETF (VTI, SCHB, or FZROX) for the deposited amount. This eliminates the “cash sitting” problem.

Step 4: Disable trading notifications. Mute financial news on your phone. Unsubscribe from broker marketing emails that suggest trades.

Step 5: Schedule one calendar check per month to confirm deposits and purchases happened. Nothing else. No “checking the market,” no rebalancing, no trying to time anything.

Step 6: In January or February, download your 1099 forms and file them with your taxes. Repeat annually.

That is it. Six steps, set up once, automated forever. This system avoids all seven mistakes, requires almost no ongoing effort, and outperforms what 80 percent of active investors achieve through years of attention and decision-making.

What to do if you have already made some of these mistakes

If you are reading this and recognize yourself in two or three of the seven mistakes, do not despair. The cost is real but recoverable, and the corrections are straightforward.

For the cash-sitting mistake, fix it today. Buy the broad-market ETF with whatever cash is in the account. The earlier this is reversed, the smaller the long-term cost.

For the individual-stock mistake, sell the worst-performing positions only if doing so does not create large taxable gains. If you have significant losses, “tax-loss harvesting” — selling at a loss to offset other gains — can turn the mistake into a small tax benefit. Consult a tax professional for specifics.

For the panic-sell mistake, the only path forward is to start over. Reinvest the cash that was pulled out, do so in equal monthly installments to ease the psychological barrier, and commit explicitly to not repeating the behavior next time.

For the fee-paying mistake, transfer assets via ACATS to a lower-cost broker, or simply switch within the existing broker to lower-cost funds. The transition usually takes a few weeks and saves money for the rest of your investing life.

For the missed Roth IRA, contribute for the previous year if you are still inside the April tax filing deadline. The Roth allows backdated contributions in this window. After the deadline, focus on maxing out the current year and every future year.

For the missed tax filing, file an amended return (Form 1040-X) if the omission was recent. The IRS treats voluntary corrections far more favorably than discovered ones, and the penalties are smaller.

A 10-minute self-audit: are you already making these mistakes?

The pattern of new investor mistakes is so consistent that it can be diagnosed in ten minutes by answering ten specific questions about your current behavior. Be honest with the answers; the audit only works if you are.

1. Look at your brokerage account right now. Is more than 5 percent of the balance sitting in cash for no specific reason? If yes, you are leaking returns to inaction.

2. Count the number of individual stocks you hold versus the number of index funds. If individual stocks outnumber index funds, you are betting against the long-term data.

3. Open your brokerage app and check the trading history for the past 90 days. If you have made more than 6 trades in that window, you are likely trading too actively.

4. What were your account balance changes during the last 5 percent or larger market drop? If you sold during the drop and did not buy back at lower prices, you have already paid the panic-sell tax once.

5. Add up the expense ratios of all the funds in your portfolio, weighted by dollar value. Is the weighted average above 0.15 percent? If yes, you are paying more in fees than necessary.

6. Do you have a Roth IRA opened, in addition to your taxable brokerage? If no, and you have earned income, you are missing one of the most powerful accounts in U.S. tax code.

7. If your employer offers a 401(k) with a match, are you contributing at least up to the full match? If no, you are leaving free money on the table.

8. When was the last time you checked your account balance? If your answer is “more than once this week,” you are checking too often. Once a month is the right cadence.

9. Do you have automatic monthly contributions set up to all your investing accounts? If no, you are relying on willpower instead of structure.

10. Did you file 1099 tax forms from your brokerage on your most recent tax return? If you skipped them, you may have an IRS notice waiting.

A score of 0 to 2 “yes/correct” answers out of ten suggests urgent corrections. A score of 5 to 7 means you are on a reasonable path but have meaningful room to improve. A score of 8 or higher means you are operating like a long-term professional, with very few common mistakes. Most new investors score 3 to 5 on a first audit, which is normal and entirely fixable.

What investing should look like in years 2, 3, and 5

Avoiding the first-year mistakes is the foundation. The pattern of years 2 through 5 is where the foundation either compounds into real wealth or stagnates. Three milestones to aim for:

End of year 2. The brokerage account should hold more than just contributions; it should show meaningful growth from the previous twelve months of market returns. You should have weathered at least one minor correction without panicking. Automatic contributions should be running on rails. A Roth IRA, if eligible, should be funded for the current and prior year.

End of year 3. The combined portfolio (taxable plus Roth plus any 401(k)) should be in the $25,000 to $40,000 range for a household contributing the recommended 10-12 percent of a $40,000-$60,000 income. The compound growth on existing balances should be becoming visible — typically $2,000 to $4,000 of growth on top of $9,000 to $12,000 in new contributions. The investor begins to internalize that money is making money for the first time.

End of year 5. Portfolio in the $60,000 to $90,000 range. By this point, market returns on existing balances are larger than annual contributions for many households. The discipline built in year one is now producing visible wealth. Common upgrades at this stage: starting a separate goal-oriented account (down payment fund, child’s college fund), exploring whether an HSA fits the family, considering professional tax help for more complex situations.

The investors who avoid the seven first-year mistakes and follow the year 2-5 pattern reliably end up with $250,000 to $400,000 in invested assets by year ten, even on modest incomes. That is not a wealthy household by U.S. standards, but it is enormously ahead of the typical immigrant or non-immigrant household that has accumulated under $50,000 in the same decade.

Frequently asked questions

How much money do I really need to start avoiding these mistakes?

The amount is irrelevant. The patterns are the same whether you are investing $50 a month or $5,000 a month. Some of the most disciplined investors in U.S. history started with very small amounts. The structure matters more than the size.

Should I sell my individual stocks and switch to index funds even if I have gains?

Depends on the tax cost. If selling triggers significant capital gains taxes, sometimes it makes sense to hold the individual stocks while redirecting all new contributions to index funds. Over time, the portfolio shifts gradually toward index funds without forcing a large tax bill. A tax professional can help calculate the trade-off.

What if I am too nervous to invest during a volatile market?

Dollar-cost averaging — investing equal amounts on a regular schedule — was designed specifically for this. Investing $200 every two weeks reduces the emotional weight of any single timing decision. Over months and years, the average entry price ends up near the market’s average price for that period, neither best nor worst, which is exactly what most investors should want.

Are robo-advisors really a complete substitute for an advisor?

For portfolios under $250,000 and for households with relatively straightforward financial situations, robo-advisors handle most of what a human advisor would do, at a fraction of the cost. Where human advisors add real value is in complex tax situations, estate planning, business ownership, or major life transitions. For everyday investing, the robo-advisor or self-directed index fund portfolio is mathematically equivalent or superior to most human advice.

Will the IRS actually come after me for missing $20 of dividend tax?

For small amounts, the IRS typically sends an automated notice (CP-2000 letter) recalculating the tax owed plus interest. If paid promptly, the matter is resolved. For repeated or larger omissions, the consequences escalate. The lesson is to file correctly the first time — it is not difficult and it builds a clean compliance history that matters if your financial situation becomes more complex.

Conclusion: the first year sets the next thirty

The mistakes covered in this article are not isolated events. They are patterns of behavior that, once established, tend to repeat year after year. The investor who panic-sells in year one is more likely to panic-sell in year ten. The investor who avoids panic-selling early builds the muscle that protects all future returns. This is why first-year discipline matters so much more than first-year returns.

Reading this article and recognizing the traps is the first step. The second is building the system in the previous section so that the right behaviors happen automatically. After that, the work of investing is mostly the work of not interfering with what is already working. Few activities in financial life pay better than disciplined inaction.

For broker-specific guides and detailed walkthroughs on opening accounts with an ITIN, see our individual broker reviews. For more on tax-advantaged retirement accounts, see our Roth IRA and 401(k) guides for immigrant investors.

“I thought investing meant picking the right company. It took losing $2,000 to understand that for 99% of people, the right move is the boring one: a total market index fund, every month, forever.”
— Diego R., Argentina → Chicago