At 20K you still need to pay around 10-15% of average income tax. At 40K probaby average income is around 20%. Not to be confused with marginal income tax, whic

At 20K you still need to pay around 10-15% of average income tax. At 40K probaby average income is around 20%. Not to be confused with marginal income tax, which is higher (probably around 25% and 30% respectively).