2017 Percentile Calculator at Don’t Quit Your Day Job.
“We’ve also displayed these brackets (in tabular form) in our income bracket article. To compare income by age, we have an individual income by age calculator. For households instead (with the full dataset, not a subset), see the income by household calculator. On the net worth side, we have a net worth bracket calculator and a net worth percentile by age calculator.”
For the data collected here (which is actually for 2016), $300,800 puts you in the top 1% (up from $288,000 last year).
The Virtual Jackdaw 