This is ONLY the FEDERAL portion, you will have to check for your local and state on your own.
Currently if you are single, filing single (not as a business) you'd be paying the following:
$0 - $8,375 = 10%
$8,376 - $34,000 = 20%
$34.001 - $82,000 = 25%
$82,001 - $171,50 = 28%
$171,851 = $373,650 = 33%
$373,651 - All Amounts Higher = 35%
But keep in mind this doesn't "automatically" mean you are paying 28%, because it is done in a ladder format so you are IN the 28% tax bracket, but everything under 82,000 is taxed by it's applicable bracket so the first 8K gets 10%, the 8,376 - 34k gets a 20% hit, and so on... so after working all out up to 100K.....
your tax is about 21.71%. ACTUAL tax liability, but you would fall under the 28% tax "bracket"
Like everyone else has said though, you can run it under your business, with write offs, do several things to lower your tax liability.