Your salary is a headline; your take-home pay is the story. A $100,000 offer letter in Denver sounds like six figures of spending power, but by the time federal income tax, Social Security, Medicare, and Colorado state tax have all taken their cut, the number that actually lands in your bank account is closer to $76,000. The biggest and least understood slice of that gap is federal income tax — and this calculator estimates it with the same graduated-bracket math the IRS uses, starting from just two numbers: your annual income and your deductions.

Here is what happens under the hood. The calculator subtracts your Deductions from your Annual Income to get Taxable Income — the only number the tax brackets actually touch. Then it runs that taxable income through the graduated brackets, taxing the first slice at 10 percent, the next at 12 percent, then 22, 24 percent, and so on. Out come three numbers: your Estimated Federal Tax, your Effective Tax Rate (total tax divided by total income), and your Net Take-Home after federal tax. Be clear-eyed about what this is: a simplified single-filer model of federal income tax only. It does not include state income tax, Social Security, or Medicare, and it is a planning estimate — not tax advice and not a substitute for a real return.

The 2026 federal brackets, in plain English

For the 2026 tax year, the IRS kept the seven familiar rates — 10, 12, 22, 24, 32, 35, and 37 percent — and nudged the thresholds up for inflation. For single filers, 10 percent applies to taxable income up to $12,400; 12 percent from $12,401 to $50,400; 22 percent from $50,401 to $105,700; 24 percent from $105,701 to $201,775; 32 percent from $201,776 to $256,225; 35 percent from $256,226 to $640,600; and 37 percent above that. The standard deduction for 2026 is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household. Those two facts — the bracket thresholds and the standard deduction — determine almost everything about a typical American's federal tax bill.

A worked example: the $100,000 salary

Take a single filer earning $100,000 and claiming the standard deduction. Taxable income is $100,000 minus $16,100, or $83,900. The first $12,400 faces 10 percent: $1,240. The next $38,000 (up to $50,400) faces 12 percent: $4,560. The remaining $33,500 faces 22 percent: $7,370. Total federal income tax: $13,170. Now meet the two rates everyone confuses. Your marginal rate — the tax on your next dollar of income — is 22 percent, because $83,900 sits in the 22 percent bracket. Your effective rate — total tax divided by total income — is $13,170 divided by $100,000, or 13.2 percent. Nearly nine percentage points lower. When someone says "I'm in the 22 percent bracket," what they really mean is that their last dollars are taxed at 22 percent; most of their dollars were taxed at 10 and 12.

The pattern holds at every income level. A $75,000 salary leaves $58,900 taxable after the standard deduction, producing about $7,670 in tax — an effective rate of 10.2 percent, even though the marginal rate is 22 percent. At $50,000, taxable income is $33,900 and the tax is about $3,820 — a 7.6 percent effective rate with a 12 percent marginal rate. At $200,000, taxable income reaches $183,900 and the tax climbs to roughly $36,734 — an 18.4 percent effective rate against a 24 percent marginal rate. Notice the shape: the effective rate always trails the marginal rate, and the gap is widest in the middle brackets, where the 10 and 12 percent slices shelter a large share of income. This is also why comparing paychecks by gross salary alone misleads — two $100,000 offers can mean very different take-home pay once state taxes and benefits enter the picture.

Why a raise never makes you poorer

The most persistent tax myth in America is that earning "too much" can push all of your income into a higher bracket and leave you worse off. It cannot happen, because brackets apply marginally — only the dollars above each threshold face the higher rate. If your taxable income rises from $50,400 to $51,400, just that extra $1,000 is taxed at 22 percent instead of 12 percent, costing you an additional $100. You keep $900 of the raise. There is one narrow real-world exception people confuse with this myth: certain tax credits and benefits phase out at income cliffs, which can create high effective marginal rates in specific situations. But the bracket system itself never taxes your whole income at the top rate.

AGI, taxable income, and the deductions in between

Three different "incomes" matter, and mixing them up causes most tax confusion. Gross income is everything you earned. Adjusted gross income (AGI) subtracts "above-the-line" deductions: pre-tax 401(k) contributions, HSA contributions, student loan interest, and a few others. Taxable income subtracts the standard or itemized deduction from AGI. The calculator simplifies this chain into income minus deductions, which is close enough for an estimate — but if you max out a 401(k), know that those dollars reduced your AGI before the standard deduction ever entered the picture. Every $1,000 you contribute pre-tax at a 22 percent marginal rate saves you $220 in federal tax, immediately and with certainty — one of the few guaranteed returns in personal finance.

Standard deduction or itemize?

About nine in ten filers take the standard deduction, because itemizing only wins if your deductible expenses clear the $16,100 bar for single filers. The usual itemized suspects: mortgage interest on up to $750,000 of acquisition debt, charitable gifts, and state and local taxes — though the SALT deduction is subject to a federal cap that Congress has adjusted in recent legislation, so check the current limit before counting on it. Big life events change the answer: buying a house with a large mortgage, a year of heavy charitable giving, or major medical bills can push you over the line. Run both numbers every year; the calculator's Deductions field accepts whichever total is larger. One more nuance: if you are 65 or older or blind, you get an additional standard deduction amount on top of the base figure.

Withholding: why your refund is a loan you gave the IRS

Your employer does not know your deductions, your spouse's income, or your side gig — it withholds based on the W-4 you filled out, often years ago. Withhold too much and you get a refund each spring, which feels like a bonus but is really an interest-free loan you gave the government. Withhold too little and you owe a balance due — plus a possible underpayment penalty. The IRS safe harbor keeps you penalty-free if you owe less than $1,000 at filing, or if your withholding covers at least 90 percent of the current year's tax or 100 percent of last year's tax (110 percent if your AGI topped $150,000). After any raise, marriage, new baby, or second job, revisit your W-4; the IRS Tax Withholding Estimator takes ten minutes and beats guessing. Use this calculator's estimated tax as the target your withholding should roughly match across the year.

The taxes this calculator does not include

Federal income tax is only one payroll deduction. Social Security takes 6.2 percent of wages up to the annual wage base (adjusted yearly for inflation), and Medicare takes 1.45 percent of all wages plus an additional 0.9 percent on earnings above $200,000. On a $100,000 salary, the employee share of these payroll taxes is $7,650 — a flat 7.65 percent that, unlike income tax, offers no standard deduction and no brackets. Your employer matches it behind the scenes. Then there is state income tax, which ranges from zero in states like Texas, Florida, Washington, Nevada, and Tennessee to over 13 percent at the top in California, with cities like New York adding their own layer. A $100,000 earner in Austin keeps meaningfully more than the same earner in San Francisco — same federal math, very different take-home. Treat this calculator's net figure as the federal-tax baseline, then subtract roughly 7.65 percent for payroll taxes and your state's bite for the full picture.

Turn the estimate into a budget

Take the $100,000 example: $13,170 in federal tax leaves $86,830, or about $7,236 a month before payroll and state taxes. After roughly $638 a month in employee payroll taxes, you are near $6,600 — the number your monthly budget should actually be built on, not $8,333. That single correction prevents the most common budgeting error among new six-figure earners: spending the gross. Re-run the calculator with a raise scenario before negotiating — knowing that a $10,000 raise at a 22 percent marginal rate means about $7,800 after federal tax (plus payroll taxes) keeps salary talks grounded in reality. And if you are comparing job offers, run each through the calculator with that state's tax reality in mind; a $95,000 offer in a no-income-tax state can beat a $105,000 offer in a high-tax one.

A few legal levers that move the number

Pre-tax 401(k) and traditional IRA contributions shrink taxable income dollar for dollar at your marginal rate. HSA contributions are triple-advantaged: deductible going in, tax-free growth, tax-free withdrawals for medical costs. Bunching two years of charitable gifts into one can push you over the itemizing threshold in alternate years. Tax-loss harvesting offsets gains in taxable brokerage accounts. None of these require exotic strategies — they are the standard toolkit, and the calculator shows you exactly how many dollars each one is worth: change the inputs and watch the tax move.

What a full paycheck really looks like

Put it all together for a single filer earning $100,000 in Colorado. Federal income tax: about $13,170. Employee payroll taxes: $7,650. Colorado's flat income tax (4.4 percent) on roughly $83,900 of taxable income: about $3,690. Total: around $24,500 — leaving roughly $75,500 a year, or about $6,290 a month, of actual spending power. That is the number your rent, car payment, and savings rate must fit inside — not $8,333. Every state changes the last line: move that same job to Austin, Texas, and the state line drops to zero, worth about $300 a month. This is why the calculator asks only about federal tax and leaves the rest to you — the federal math is national, but take-home pay is local.

The freelancer's trap: quarterly estimated taxes

If you earn through 1099 work — freelancing, contracting, a side business — nobody withholds for you, and the IRS still wants its money four times a year. When you expect to owe $1,000 or more beyond withholding, you must pay estimated taxes quarterly (typically mid-April, mid-June, mid-September, and mid-January). Miss them and the underpayment penalty applies even if you pay in full at filing. The self-employment tax adds another layer: 15.3 percent on net earnings up to the Social Security wage base (both the employee and employer halves, since you are both), though you do get to deduct half of it above the line. A freelancer earning $100,000 in profit owes roughly $14,130 in self-employment tax before income tax even starts. Run this calculator on your expected profit minus the business deductions, then add the self-employment tax on top — that combined number, divided by four, is your quarterly target.

Three mistakes that cost real money

First, treating a tax refund as a windfall. A $3,000 refund means you overpaid by $250 a month all year — money that could have been killing credit card interest or earning yield. Adjust your W-4 and give yourself the raise monthly instead. Second, ignoring state taxes when relocating or going remote. Moving from California to Texas at a $150,000 salary can be worth $10,000-plus a year in state tax alone — more than most raises. Third, forgetting that not all income faces the same rates. Long-term capital gains and qualified dividends get preferential rates (0, 15, or 20 percent depending on income) — well below ordinary brackets — which is why holding investments longer than a year and favoring qualified dividends is genuinely tax-efficient. Short-term gains, by contrast, are taxed as ordinary income at your full marginal rate.

With the pre-filled defaults — Annual Income ($) 75,000, Standard Deduction ($) 12,550 — the Income Tax Calculator returns Taxable Income ($) 62,450.00, Estimated Federal Tax ($) 9,487.50, Effective Tax Rate (%) 12.6500, Net Take-Home ($) 65,512.50. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.