Form W-2 is issued to employees who are on payroll. Employers withhold income tax, Social Security, and Medicare from each paycheck and also contribute the employer’s share of payroll taxes. At the end of the year, the employee receives a W-2 to file their tax return. For example, if you work full-time at a company with health insurance and a 401(k) plan, you’ll almost certainly get a W-2.

Form W-9, on the other hand, is filled out by independent contractors, freelancers, or self-employed professionals. The hiring company uses this information to issue Form 1099-NEC at year-end, reporting how much they paid you. No taxes are withheld from payments — you’re responsible for paying your own income taxes and self-employment taxes (covering both the employer and employee share of Social Security and Medicare). In short, W-2 income comes with tax withholding and benefits, while W-9 income offers more independence but requires you to handle taxes on your own.

A 401(k) is an employer-sponsored retirement plan. You contribute a portion of your paycheck on a pre-tax basis (Traditional 401(k)) or after-tax basis (Roth 401(k), if offered). Many employers also offer a matching contribution — for example, contributing 50% of what you put in, up to a certain limit. For 2025, the employee contribution limit is $23,000 (or $30,500 if age 50 or older, thanks to “catch-up contributions”). Funds grow tax-deferred, and distributions in retirement are generally taxed as ordinary income (for Traditional 401(k)).

An IRA (Individual Retirement Account) is set up directly by you at a bank, brokerage, or financial institution. With a Traditional IRA, your contributions may be tax-deductible (depending on income and whether you’re covered by a workplace plan), and withdrawals in retirement are taxable. With a Roth IRA, contributions are made with after-tax dollars, but withdrawals in retirement are tax-free if certain conditions are met. For 2025, the IRA contribution limit is $7,000 (or $8,000 if age 50+). The main difference: a 401(k) is tied to an employer, while an IRA is a personal account you control.

A sole proprietor or self-employed individual reports business income on their personal tax return (Schedule C). It’s simple and inexpensive to operate this way, but the downside is paying self-employment tax — 15.3% covering both the employer and employee portions of Social Security and Medicare — on top of regular income tax. For example, if your business nets $100,000, you’ll owe both income tax and roughly $15,300 in self-employment tax.

Forming a corporation (C-Corp or S-Corp) or an LLC may offer tax advantages depending on your situation. For instance, an S-Corp allows you to split income between salary (subject to payroll taxes) and distributions (not subject to self-employment tax), potentially reducing overall tax. A C-Corp pays corporate income tax (21% federal rate), but allows for reinvestment of profits and potential fringe benefits. An LLC is flexible — it can be taxed as a sole proprietorship, partnership, or corporation. The trade-off: corporations and LLCs involve more paperwork, compliance costs, and ongoing administrative requirements. The “most tax-effective” choice depends on your income level, liability concerns, and long-term business goals.

The FBAR (FinCEN Form 114) is required if you are a U.S. person and had foreign financial accounts with an aggregate value over $10,000 at any point during the year. Failure to file can result in significant penalties — up to $10,000 per non-willful violation, and much higher for willful violations.

If you unintentionally failed to file, the IRS provides relief options through the Delinquent FBAR Submission Procedures and, in more complex cases, the Streamlined Filing Compliance Procedures. Under the delinquent procedures, you can file the missing FBARs with an explanation, and in many cases, penalties may be waived if there is no tax underreporting. The streamlined procedures apply if your failure to file was non-willful, and they may require filing amended tax returns along with late FBARs, but they offer reduced penalties compared to full enforcement.

It is very important not to ignore past FBAR obligations. The best step is to determine whether your situation qualifies as non-willful and consider consulting a tax professional who specializes in offshore compliance. Acting proactively shows good faith and can significantly reduce potential penalties.