The point is you still have to shell out for the car. You don't get to take if off the top.
All the posts I've read over the months telling people to just spring for the MR ignores the fact that (before December 31) a $44K outlay is a lot different than $35k for many people.
Except you're
not required to "shell out" the whole amount up front....even if you were paying cash for the car you could just get a loan for that 7.5k and repay it in full a couple months later. At the interest rates available late last year you'd be talking a "cost" of maybe 50-100 bucks interest out of pocket.
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The whole price factors into your payment, and it has to fit a budget. Even if you take the full tax credit and apply it to your loan, you are still left with that monthly payment.
Optimal order time an MR would've been Mid-October 2018....45k up front for MR with PUP. $7500 tax credit.
Let's say money IS a bit tight and you go for an 84 month loan as a result- they were around 2.29% then-
that's $580 a month, and you'll be getting $7500 back on your taxes.... or almost $94 per remaining payment if you hung on to it for that use over the ~80 months you had left on the loan when you did your taxes.
So your payment is about $486 a month applying the tax credit to remaining payments.
Now let's say you didn't do that- you wait till the next "cheaper" one comes out... that's almost certainly gonna be the SR
still requiring PUP so 40k... bad news though- interest rates are higher now... 2.99 seems the best these days on an 84 month loan, which is... $528 a month. And you're most likely getting 3750 back in taxes- or just under $47/month over 80 payments.
So you're looking at a net payment of $481. For a short range car.
Versus $486 a month for the medium range one.
If $5 a month breaks you maybe a new car is a bad idea?
Oh- and the SR without PUP? Assuming they DO sell it by December- you're talking 35k for 84 months at likely 3.5%, so $470 a month, and only $1875 back on taxes, which is just over $23/month. over 80 months.
Your net payment would be... $447
Granted, this IS ~35 bucks a month more than getting the much nicer featured, longer range, model 3... but again if THAT breaks your budget a new car is a really dumb idea in the first place.
And if you miss the Dec 31 deadline to take delivery of your SR? Now you are paying only $16 a month less to have given up PUP and longer range and waiting over a year still paying for gasoline.