This is my first year including the sale of RSU's (or any stocks) in my taxes. My expectation was that short term gains would be taxed at a rate similar to my normal income tax rate, and long term gains would be taxed at 10%. However, the numbers generated by online tax software are higher than expected. I used two popular sites to cross-validate, and they both generated almost identical numbers.
For short term gains, the fed tax rate appears to be close to 39%, which is higher than my income bracket's tax rate (33%). I.e., if I add a stock sale to my tax report where the short term gain was $1000, my fed amount owed goes up by $390.
For long term gains, the fed tax rate appears to be close to 26%, which is higher than the expected 10%. I.e., if I add a stock sale to my tax report where the long term gain was $1000, my fed amount owed goes up by $260.
Can anybody shed any light on this?