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Federal Income Tax Estimator

Estimate your 2024 federal tax liability and refund in seconds. See your bracket breakdown, effective vs. marginal rate, and whether your withholding is on track.

401(k) Limit 2024$23,000
Roth IRA Limit$7,000
S&P 500 Avg Return~10%/yr

Estimated federal refund

+$979

Withheld $8,000 · Owe $7,021 · Refund $979

2024 tax year · Federal only · Estimate

Adjusted Gross Income
$69,000
after pre-tax contributions
Taxable Income
$54,400
after $14,600 deduction
Total Federal Tax
$7,021
before withholding credit
Effective Rate
10.2%
marginal: 22%
2024 tax bracket breakdown
RateBracket rangeIncome in bracketTax
10%$0 $11,600$11,600$1,160
12%$11,600 $47,150$35,550$4,266
22%← marginal$47,150 $100,525$7,250$1,595
24%$100,525 $191,950
32%$191,950 $243,725
35%$243,725 $609,350
37%$609,350 No limit
Total federal tax$54,400$7,021

Common misconception: marginal vs. effective rate

Your marginal rate is 22%.

That does not mean you pay 22% on your entire income. The 22% rate only applies to the $7,250 that falls into that bracket.

Your effective rate is 10.2%.

This is the average rate across all your income — you owe $7,021 on AGI of $69,000. The tax system is progressive: lower income is taxed at lower rates first.

Withholding status

Withheld

$8,000

Owe

$7,021

Refund

+$979

You've over-withheld by $979. The IRS will send you a refund after you file.

1

Adjusted Gross Income (AGI)

AGI = gross_income − pre_tax_deductions

$75,000 − $6,000

= $69,000

Pre-tax deductions (401k: $6,000, HSA: $0, other: $0) save $1,320 in federal tax at your 22% marginal rate.

2

Taxable Income

taxable_income = AGI − standard_deduction

$69,000 − $14,600

= $54,400

2024 standard deduction for Single: $14,600. Standard is optimal for your situation.

3

Federal Tax (by bracket)

tax = Σ(income_in_each_bracket × bracket_rate)

$11,600 × 10% + $35,550 × 12% + $7,250 × 22%

= $7,021

Marginal bracket: 22% — but only $7,250 of your income is taxed at that top rate. Every $1,000 of pre-tax retirement savings saves $220 in federal tax.

IRS 2024 tax brackets (Rev. Proc. 2023-34)

4

Effective Tax Rate

effective_rate = total_tax ÷ AGI

$7,021 ÷ $69,000

= 10.2%

Marginal rate 22% vs effective rate 10.2% — a 54% gap. The effective rate is your real burden; the marginal rate is what the next dollar costs.

5

After-tax take-home income

after_tax = gross_income − total_tax − pre_tax_deductions

$75,000 − $7,021 − $6,000

= $61,979

$5,165/month · $1,192/week · $30/hour (at 40hr/wk). Note: this is federal tax only — add state income tax and FICA (7.65%) for your true take-home.

6

Federal refund

refund = withholding − total_tax

$8,000 − $7,021

= +$979 refund

You over-withheld — a refund means you gave the IRS an interest-free loan. Adjust your W-4 to get more in each paycheck instead.

Key insight

Your effective federal rate is 10.2% — 54% lower than your 22% marginal bracket. Every pre-tax dollar you contribute to a 401(k) or HSA saves you 22% in federal tax.

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Numbers never leave your browser · 2024 tax year · Not tax advice

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