Ok, here you go.
Retiree, mid 90’s fixed income from annuity and SS, minor income from rental. Income in the low to mid 20’s. Based on her actual return, these are the percentages generated.
Amount of income subject to taxation (that is after deductions/exemptions) 2017 = 43.48%, 2018 = 46.36%
Taxes as a percent of income after ded/exemp.2017 = 4.36%, 2018 = 4.42%.
Taxes as a percent of actual income 2017 = 10.03%, 2018 = 9.54%
So if she had had an income of $25,000.00 both years then:
In 2017 the taxable amount would have been $10,870.00 and it would have been taxed at a rate of 10.03% for a total taxes of $1090.00.
In 2018 the taxable amount would have been $11,590.00 and it would have been taxed at a rate of 9.54% for a total taxes of $1,105.00.
So, if she had actually had the same income for both years, she would have come out owning $15.00 more this year than last year. So, at least in this case the vaunted Republican Tax give-a-way did not amount to a hill o’ beans.
I am sure it differs for the different tax brackets and even for incomes within those brackets since the standard deduction is not on a sliding scale within the brackets but a fixed constant. This is just a real world example for someone at the lower end of the income scale.