Okay, here are my numbers for 2016 (somewhat modified for anonymity purposes). Married, filing jointly:
gross income $50,000
total deductions 21,000 (I guess that's the standard, we didn't itemize)
total taxable income 29,000
total tax 4000
total payments 5000
refund 1000
Assuming the 2017 numbers are the same (they aren't, they will be higher), but if they were, am I correct in assuming the 7500 tax credit would just wipe out the 4000 in total tax line, and I would get 4000 back in extra refund?
How much you get in a refund every year has to do with what you did on your W-4. Basically you didn't calculate your W-4 correctly so you're giving the government a $1000 interest free loan.
Incorrect, in my case. I intentionally set my with holdings at the higher single rate, then I have $10 to $20 extra held out of each paycheck for federal taxes. Yeah, I know, I'm giving the government an interest free loan, etc, but $20 extra per week won't mean much to me, whereas it is nice to get that extra surge of $1000 or so at tax time!
Besides, I do contract 1099 IT work on the side, aside from the regular IT job, so holding out tax now helps cover the tax owed on that 1099 income.
BUT THEN AGAIN -- if I am anticipating a 7500 tax credit this year from my 3, should I not hold extra out of the paycheck, and file at normal married rate, thus reducing my refund and increasing tax owed NOW, so that the 7500 tax credit will cover it LATER this year?
But if I don't get my 3 until 2018, I think that plan would be ruined.