2018 Federal Tax Calculation Table
'/%3E%3Ccircle cx='48' cy='39' r='19' fill='%23f2c9a5'/%3E%3Cpath d='M27 35c3-16 39-17 42 2-8-8-27-9-42-2z' fill='%23374151'/%3E%3Cpath d='M21 86c5-24 49-28 56 0z' fill='%232563eb'/%3E%3Ccircle cx='41' cy='41' r='2' fill='%23111827'/%3E%3Ccircle cx='55' cy='41' r='2' fill='%23111827'/%3E%3Cpath d='M42 52c4 3 9 3 13 0' stroke='%2392400e' stroke-width='3' fill='none' stroke-linecap='round'/%3E%3C/svg%3E)
Reviewed by Calculator Editorial Team
The 2018 federal tax calculation table provides the official tax brackets, standard deductions, and taxable income thresholds for individual income tax returns in the United States. This guide explains how to use the table to calculate your federal income tax liability for the 2018 tax year.
Introduction
The Internal Revenue Service (IRS) publishes annual tax tables that show the tax brackets and rates for federal income tax. For the 2018 tax year, the IRS provided the following information:
- Tax brackets for single, married filing jointly, married filing separately, and head of household filers
- Standard deductions for each filing status
- Taxable income thresholds for each bracket
This guide explains how to use the 2018 federal tax calculation table to determine your taxable income and federal income tax liability.
2018 Tax Brackets
The 2018 federal income tax brackets are progressive, meaning the tax rate increases as your taxable income increases. The table below shows the tax brackets for each filing status:
| Filing Status | 10% Bracket | 12% Bracket | 22% Bracket | 24% Bracket | 32% Bracket | 35% Bracket | 37% Bracket |
|---|---|---|---|---|---|---|---|
| Single | $0 - $9,525 | $9,526 - $38,700 | $38,701 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $500,000 | $500,001+ |
| Married Filing Jointly | $0 - $19,050 | $19,051 - $77,400 | $77,401 - $165,000 | $165,001 - $315,000 | $315,001 - $400,000 | $400,001 - $600,000 | $600,001+ |
| Married Filing Separately | $0 - $9,525 | $9,526 - $38,700 | $38,701 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $300,000 | $300,001+ |
| Head of Household | $0 - $13,600 | $13,601 - $51,800 | $51,801 - $82,500 | $82,501 - $157,500 | $157,501 - $200,000 | $200,001 - $500,000 | $500,001+ |
Note: These brackets are for the 2018 tax year. Tax brackets change each year based on IRS updates and inflation adjustments.
Standard Deductions
The standard deduction reduces your taxable income by a fixed amount. The 2018 standard deductions were:
| Filing Status | Standard Deduction |
|---|---|
| Single | $12,000 |
| Married Filing Jointly | $24,000 |
| Married Filing Separately | $12,000 |
| Head of Household | $18,000 |
To calculate your taxable income, subtract the standard deduction from your total income. If you itemize deductions instead of taking the standard deduction, your taxable income will be different.
Calculating Taxable Income
The formula for calculating taxable income is:
Taxable Income = Total Income - Deductions
Where deductions include both the standard deduction and any itemized deductions you may have. Once you have your taxable income, you can use the tax brackets table to determine your federal income tax liability.
The IRS provides a progressive tax calculation method where you pay the lower tax rates on the first portion of your income and higher rates on the remaining portions. For example:
Federal Income Tax = (First Bracket Amount × Rate) + (Second Bracket Amount × Rate) + ...
Example Calculation
Let's calculate the federal income tax for a single filer with $50,000 in total income:
- Subtract the standard deduction: $50,000 - $12,000 = $38,000 taxable income
- Determine the tax brackets:
- $0 - $9,525 at 10%
- $9,526 - $38,700 at 12%
- Calculate the tax:
- First $9,525 × 10% = $952.50
- Remaining $28,475 × 12% = $3,417.00
- Total tax = $952.50 + $3,417.00 = $4,369.50
Therefore, a single filer with $50,000 in income would owe approximately $4,369.50 in federal income tax for the 2018 tax year.
FAQ
- What is the difference between taxable income and gross income?
- Taxable income is your gross income minus any deductions you can claim. Gross income includes all income from wages, salaries, tips, and other sources.
- How do I know if I should itemize or take the standard deduction?
- The standard deduction is simpler and may be better for most filers. Itemizing allows you to deduct specific expenses like mortgage interest, charitable donations, and medical expenses, but requires more record-keeping.
- Are there any changes to the 2018 tax brackets compared to previous years?
- Yes, the 2018 tax brackets reflect inflation adjustments and changes in tax law. The brackets are progressive, meaning higher-income filers pay higher rates on their income.
- What happens if my income falls into multiple tax brackets?
- The IRS uses a progressive tax system where you pay the lower rates on the first portion of your income and higher rates on the remaining portions. This means you pay less tax overall than if you were in the highest bracket for your entire income.
- Where can I find the official 2018 tax tables?
- The official 2018 tax tables are published by the IRS on their website. You can find them by searching for "2018 IRS tax tables" or visiting the IRS.gov website.