I just got my Lease buyout quote which includes the tax in AZ, I think it is around 7.8% here but maybe you can see by my numbers and get an idea. I will tell you that when you go into financing they will try to add alot onto the price so you need to be firm and only take what you want/ can afford as it will increase the price.
So I got a 2019 RWD GT2 negotiated from dealer down to $45,399.00 I did the 36 month Lease with a KMF Discount of $6,200 which brought the price down to $39,199 I also had a trade of $4,450 so the price was $34,749.
Finance add ons:
Sales use tax on capitalized cost reduction : $3.58
License title and registrations fee: $906.60
Dealer documentation/ Service Fee: $498.00
Extended Bumper to Bumper 5yr 100k: $597.00
Acquisition Fee: $650.00
Price $37,404.18
I paid $450.33 at dealership to take delivery first month Lease payment. $36,953.85 then with sales tax add about $2,882.40 so payoff would be $ 39836.25 by my calculations
The buyout I received from Kia for the Lease buyout to purchase the car came to $39,973.15 interest calculated out to 2/1/2019. So if I were to add the $450 I paid at dealership the actual out the door price would be about $40,423.48 for a 2019 GT2. If you take out my trade just add the $4,450 for $44,873.48. MSRP of the car listed was $51,480.00 So about 12.8% off the sticker price out the door.
That includes the tax and everything and since I'm keeping my same plates for my trade I should get a refund back for the tags I paid through 2020 on my other car so that will come separately. So I think when you are negotiating with the dealer you need to factor in the additional costs.
Hope that helps I was meaning to post my final numbers after I got the lease buyout quote. I purchased on 12/30/18 and it was loaded into the Kia website 1/10/19.
But if the new January Kia incentives are correct you can go for a 24 month Lease and take more cash for the lease then buyout. The lease incentives would be the best way to reduce the price further after negotiating the price on the car.