Wow, that is a large Parsonage. Therefore, it seems about right.
'Regular' Medicare taxes for self employment is 2.9% (after an adjustment by 92.35%). So the Medicare calculation is $45,600 x 92.35% x 2.9% = $1216.
The Additional Medicare tax is 0.9%. So that would be $409, but your income could be on the border so it may not all be subject to that, which is why you are paying LESS than that.
