Your calculator is wrong. Social security taxes have a cap on them.

Quick Q - did u email to 3rd way? NPR?

I built one too. http://news.ycombinator.com/item?id=1745574

Where is it?

It is http://www.yourtaxreceipt.org

I emailed Jacob @ NPR (article writer) as well as the paper authors, share stats if you would as they come in -

Maybe some colour categorisation + colour coding so it's easy to see how much different bits cost. http://imgur.com/gxSxk

As you get more data you could maybe make it possible to drill down to get more detail too.

Your rock, nicely done. One suggestion: Maybe base the calculator off of Gross Income? That number is arguably better known by people than taxes paid. Just a thought.

You've got a misplaced decimal in your calculations somewhere, as your numbers add up to less than 10% of what I put in.

heh, I fixed it.