1.6% including my wife's salary.
3.06% with salary only.
That is gross salary income through employers. Not including investment income.
We both max out our employee provided retirement and dump 8% into ESPP. Too lazy to give you the finer details in order to figure out the percentage based on net income. Too many things to back out and would need to pull up a paystub. The percentages will be a lot higher though. Sorry too lazy for all of that!
