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Where Every Dollar of Your Paycheck Actually Goes

Most people look at their paycheck, see a number smaller than they expected, and move on. They never bother to understand why the gap between their salary and their bank deposit is so large. I used to be the same way. Then I ran a hedge fund, started doing my own taxes, and realized the system is designed to be confusing on purpose. Let me break it down in plain English.

How Federal Income Tax Actually Works

The single most important thing to understand about your paycheck is that federal income tax is progressive. This does not mean the government takes a flat percentage of your income. Instead, your income is sliced into layers (brackets), and each layer is taxed at a different rate.

In 2025, the brackets for a single filer are: 10% on the first $11,925 of taxable income, 12% on income from $11,925 to $48,475, 22% from $48,475 to $103,350, 24% from $103,350 to $197,300, 32% from $197,300 to $250,525, 35% from $250,525 to $394,600, and 37% on everything above $394,600. This is why a person earning $100,000 does not pay 22% on the entire amount -- they pay 10% on the first layer, 12% on the second, and 22% only on the portion above $48,475. The result is an effective rate far lower than the marginal rate.

Before any brackets even apply, you get a standard deduction: $15,000 for single filers, $30,000 for married filing jointly, and $22,500 for head of household. This is income that is completely tax-free. About 90% of Americans take the standard deduction because it exceeds what they could itemize.

FICA: The Taxes Nobody Talks About

FICA is the sneaky one. It stands for the Federal Insurance Contributions Act, and it funds Social Security and Medicare. Unlike income tax, FICA has no deductions, no brackets for most people, and no way to avoid it. Your employer withholds 6.2% for Social Security (on wages up to $176,100 in 2025) and 1.45% for Medicare (on all wages, with an additional 0.9% surtax on wages above $200,000). Your employer matches the 6.2% and 1.45%, but you never see that money -- it is not part of your gross pay.

Here is the part that stings: for most middle-income earners, FICA taxes are actually larger than their federal income tax. A single filer earning $50,000 pays about $3,420 in federal income tax but $3,825 in FICA. The payroll tax burden is regressive by design -- the Social Security portion stops at $176,100, so someone earning $500,000 pays the same Social Security tax as someone earning $176,100.

How to Legally Reduce Your Tax Burden

You cannot change the tax code, but you can be strategic about how you use it. Here are the most impactful moves, in order:

State Tax: The Wild Card

State income tax is where geography becomes a financial decision. Nine states -- Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming -- charge zero state income tax on wages. On the other end, California tops out at 13.3%, New York at 10.9%, and Oregon at 9.9%. For a six-figure earner, the difference between living in Texas and California can be $7,000 to $10,000 per year in state taxes alone. That is a car payment.

But do not move to a no-income-tax state thinking you have outsmarted the system. Many of these states make up the revenue with higher property taxes (Texas), sales taxes (Tennessee and Washington), or both. The total tax burden matters more than any single tax. New Hampshire has no income tax but some of the highest property taxes in the country.

Common Paycheck Deductions Explained

Beyond taxes, your paycheck may show deductions for health insurance premiums (your share of employer-provided coverage, typically $100 to $600 per month), dental and vision insurance, life insurance, disability insurance, and various retirement contributions. Pre-tax deductions like 401(k) and health insurance reduce your taxable income, which means they cost less than their face value. A $500/month health insurance premium in the 22% bracket really costs you about $390 after tax savings.

Post-tax deductions like Roth 401(k) contributions, union dues, and wage garnishments come out after taxes and do not reduce your tax bill. Understanding which deductions are pre-tax vs. post-tax is essential to accurately predicting your take-home pay.

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