Online Calculators by CalcNexus
Online Calculators by CalcNexus

2018 Federal Tax Calculator

Filing Status 
Adj. Gross Income  C
Itemized Deductions
(Leave blank for Standard)
Personal Exemptions  C
Estimated Federal Tax Summary
*Deductions -  
*Exemptions -  
Taxable Income =  
Estimated Tax:
Note: If applicable, child tax credits may reduce the amount of federal tax that you owe.
*CAUTION: Your deductions and personal exemptions may be limited if your AGI is above the phase out limit.


Tax Estimator This Federal Tax Calculator uses the 2018 Federal Tax Rate Schedules from to estimate your federal tax liability (not including earned income or child tax credits) based on the income and tax information that you specify. This calculator is simplified and not meant to replace official tax worksheets, but it can be very useful for quick approximations. To calculate your actual tax, you would need to use Form 1040, 1040A, 1040EZ as appropriate.

This calculator does not take into account dividend or capital gains taxes.


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Filing Status - The official descriptions for the different filing status options can be found on pages 12-13 of the IRS 1040 Instructions [PDF]. For your convenience, summarized description are listed below.
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Adjusted Gross Income (AGI) - This is your total estimated income minus estimated adjustments to income, such as Qualified Plan / IRA contributions.

Itemized Deductions - If you plan to itemize deductions, enter the estimated amount of itemized deductions, or leave the field blank to choose the standard deduction. Caution: There may be a phase out associated with your deductions if your AGI is above a certain limit (see the IRS Pub 505 for details [PDF 1.5MB] for details).

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Personal Exemptions - Enter the number of personal exemptions (1 for Single, 2 for Married filing jointly, etc.). Leave this field blank to use the default. Caution: There may be a phase out associated with your personal exemptions if your AGI is above a certain limit (see the IRS Pub 505 for details [PDF 1.5MB]).

Taxable Income - This is the amount that you would use to look up how much federal tax is owed based on the tax rate schedules.

Fed Tax Bracket - This is your tax rate based on your estimated Taxable Income. Basically, this means that additional income will likely be taxed at this rate (until you cross over into the next bracket). Your total Estimated Tax does NOT equal your Taxable Income times your Tax Bracket rate! That is because the first part of your income is taxed at 10%, then your next amount of income is taxed at 15%, and so on. See the tax rate schedules for more detail.

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Disclaimer: This calculator is for informational use only and does not constitute tax or financial advice. We do not and can not guarantee the accuracy of the results, and you should not use this calculator for completing your federal tax return. Please consult a qualified professional for help in completing tax forms and making financial decisions. We do not store or transmit information entered into this calculator.