About The Tax Calculator

Some information about the figures used to generate the answers displayed in The Tax Calculator:

Federal Income Tax

The Tax Calculator uses Income tax information from the tax year 2018 to calculate the deductions made on a salary. Although we have tried to make this site accurate, it is by no means infallible, and is not intended to give you your exact tax data. Because of the number of variables involved, this site can't do the job of Form 1040. The main considerations are included, others are not, but we hope that most people will be able to get a good approximation of what their employer will withhold.

Federal Income tax is paid only on TAXABLE income, which is however much of your salary is left after the deductions have been made. Details of the deductions included in this site, and the tax bands, below.

Standard Deductions

Standard Deductions
Single$12,000
Married Joint$24,000
Married Separate$12,000
Head of House$18,000

Deductions are calculated according to how many dependents you have (excluding yourself and your spouse). There is a standard deduction for each filing status.

For single filing status, the standard deduction is $12,000. If you are married and filing a joint return, the standard deduction is $24,000. If you are married and filing separate returns, the standard deduction is $12,000. If you are the head of the household, the standard deduction is $18,000.

Other Deductions

The "Other Monthly Deductions" allows you to enter a $ value for any other amount you wish to have included as a deduction. This is so you can compensate for things such as retirement plan contributions, which are tax free. Any value you enter in here (the monthly deduction) is multiplied by 12, and then included in the deductions to find the taxable pay. Whatever you enter into this field is also subtracted from the take-home pay value - because contributions of this type are not coming home with you.

Pease

Pease Thresholds
Single$266,700
Married Joint$320,000
Married Separate$160,000
Head of House$293,350
Pease Phaseout Rate3%
Pease Phaseout Max80%

Pease is a way in which tax deductions are reduced for higher earners, effectively increasing the tax you pay. Pease is named after the congressman who introduced it originally, and reduces the amount of "Other deductions" that you can deduct from your salary.

Pease reduces the deductible amount of "Other deductions" at a rate of 3 cents for each dollar you earn over the Pease threshold, which is different for each filing status (see the table to the left). These deductions are never reduced completely to zero, however - Pease deduction phaseouts are limited to 80% of the total deductions.

In fact, some itemised deductions are not susceptible to reduction under the Pease code, but for the purposes of calculations on this website, all deductions are affected by Pease. The total value of any deductions is still subtracted from the "Take home" total.

Single

Single Tax Rates
$ 0 - $ 9,52510 %
$ 9,525 - $ 38,70012 %
$ 38,700 - $ 82,50022 %
$ 82,500 - $ 157,50024 %
$ 157,500 - $ 200,00032 %
$ 200,000 - $ 500,00035 %
Over $ 500,00037 %

If your filing status is "single", the standard deduction is $12,000. The first tax band covers annual TAXABLE income from $0 to $9,525. On this band, you will pay 10% income tax. Between $9,525 and $38,700 you will pay 12%. Between $38,700 and $82,500 you will pay 22%. Between $82,500 and $157,500 you will pay 24%. Between $157,500 and $200,000 you will pay 32%. Between $200,000 and $500,000 you will pay 35%.

Anything earned over $500,000 is taxed at 37%.

It is possible that your deductions might lower your income tax such that Alternative Minimum Tax is applied - see the AMT section below for more information.

Married Joint

Married Joint Tax Rates
$ 0 - $ 19,05010 %
$ 19,050 - $ 77,40012 %
$ 77,400 - $ 165,00022 %
$ 165,000 - $ 315,00024 %
$ 315,000 - $ 400,00032 %
$ 400,000 - $ 600,00035 %
Over $ 600,00037 %

If you are a married couple filing a joint return, the standard deduction is $24,000. The first tax band covers annual TAXABLE income from $0 to $19,050. On this band, you will pay 10% income tax. Between $19,050 and $77,400 you will pay 12%. Between $77,400 and $165,000 you will pay 22%. Between $165,000 and $315,000 you will pay 24%. Between $315,000 and $400,000 you will pay 32%. Between $400,000 and $600,000 you will pay 35%.

Anything earned over $600,000 is taxed at 37%.

It is possible that your deductions might lower your income tax such that Alternative Minimum Tax is applied - see the AMT section below for more information.

Married Filing Separately

Married Separate Tax Rates
$ 0 - $ 9,52510 %
$ 9,525 - $ 38,70012 %
$ 38,700 - $ 82,50022 %
$ 82,500 - $ 157,50024 %
$ 157,500 - $ 200,00032 %
$ 200,000 - $ 300,00035 %
Over $ 300,00037 %

If you are married, but filing a separate return, the standard deduction is $12,000. The first tax band covers annual TAXABLE income from $0 to $9,525. On this band, you will pay 10% income tax. Between $9,525 and $38,700 you will pay 12%. Between $38,700 and $82,500 you will pay 22%. Between $82,500 and $157,500 you will pay 24%. Between $157,500 and $200,000 you will pay 32%. Between $200,000 and $300,000 you will pay 35%.

Anything earned over $300,000 is taxed at 37%.

It is possible that your deductions might lower your income tax such that Alternative Minimum Tax is applied - see the AMT section below for more information.

Head of Household

Head of House Tax Rates
$ 0 - $ 13,60010 %
$ 13,600 - $ 51,80012 %
$ 51,800 - $ 82,50022 %
$ 82,500 - $ 157,50024 %
$ 157,500 - $ 200,00032 %
$ 200,000 - $ 500,00035 %
Over $ 500,00037 %

If you are the head of a household, the standard deduction is $18,000. The first tax band covers annual TAXABLE income from $0 to $13,600. On this band, you will pay 10% income tax. Between $13,600 and $51,800 you will pay 12%. Between $51,800 and $82,500 you will pay 22%. Between $82,500 and $157,500 you will pay 24%. Between $157,500 and $200,000 you will pay 32%. Between $200,000 and $500,000 you will pay 35%.

Anything earned over $500,000 is taxed at 37%.

It is possible that your deductions might lower your income tax such that Alternative Minimum Tax is applied - see the AMT section below for more information.

Alternative Minimum Tax

AMT Exemption Amounts
Single$70,300
Married Joint$109,400
Married Separate$54,700
Head of House$70,300
AMT Phaseout Thresholds
Single$500,000
Married Joint$1,000,000
Married Separate$500,000
Head of House$500,000
AMT Tax Rate Thresholds
Single$191,100
Married Joint$191,100
Married Separate$95,550
Head of House$191,100
AMT Tax Rates
Below threshold26%
Above threshold28%

The Alternative Minimum Tax, or AMT, was introduced in an effort to make sure that high income earners paid a suitable amount of tax without being able to make large deductions and thus avoid Federal Income Tax. A baseline "Tentative Minimum Tax" (TMT) is calculated and compared with the taxpayer's Federal Income Tax. If the TMT is greater than the Federal Income Tax, the Alternative Minimum Tax is applied as the difference between the two values.

There are AMT thresholds below which no TMT will be calculated - for single filers this is 70,300, for joint married applications it is 109,400, it is 54,700 if married filing separate returns and it's 70,300 for the Head of Household. The AMT exemption is reduced by 25 cents for each dollar earned over the phaseout thresholds detailed in the table to the left, until it reaches zero - or in the case of married filing separately, the exemption can be reduced further to a negative value as large as the original exemption (i.e. additional tax is applied).

Once the exemption is deducted from gross income, the TMT is calculated at 26% of income under the AMT high-earning threshold and 28% of income over this threshold. The threshold is different for each filing status, and these values are listed in the table to the left.

Once TMT has been calculated, it is compared to the Federal Income Tax which has been calculated according to the previous section. If the TMT is higher than the income tax, an additional tax of the difference between the TMT and income tax is applied, so that the taxpayer pays the TMT.

Social Security

OASDI portion6.2%
upto a maximum$7,979.40/year
Medicare portion1.45%
Additional Medicare0.9%

Social Security for employees is calculated as the OASDI (Old Age, Survivors and Disability Insurance) portion of 6.2% of income up to $128,700 plus the Medicare portion of 1.45% of all earnings. For the tax year 2018, this means that the maximum OASDI contribution is $7,979.40. There is no maximum for the Medicare portion.

Starting in 2013, employers were instructed to withold an additional Medicare tax of 0.9% on earnings over the additional Medicare threshold. For single filers, this threshold is $200,000. For married couples filing a joint return, this threshold is $250,000, for married separate returns the threshold is $125,000 and for the head of household it is $200,000.

State Income Tax

This site does not currently calculate state income tax, which is levied differently by each state. In the future, we hope to be able to integrate it into the site.