Since I graduated college my income has increased from ~$28k to over $100k. My effective tax rate has only increased. When I was earning in the mid $30k's it was about 4%. Last year was 12%.

> I don't know how low your income needs to get to reach a 15% tax rate on income, but it's really low.

I was below 15% in the low $70k range for sure. We'll see what it is this year.