How much does the iPhone 5 cost with an upgrade?

I will be eligible for an upgrade next month and I have an iPhone 4. How much will I have to pay for the iPhone 5? 5s? Please let me know, thank you.

Added (1). Yes, I use AT&T

It depends. Are you on ATT? I have a family plan I was paying $250 for 4 phones. My wife, kid and I have 5s. My other kid has a 4 which is slow with the new IOS, so I wanted to early upgrade. I switched me t a Next plan, got him a new 5s, and my bill dropped to $190 a month with more minutes and a better data plan. I only paid $39 out of pocket.

Oh. When I did the past upgrade, IT was $200 for a 5. I got a 5s with 64 gig and paid about $400.

Once you contract is over and you want to upgrade the cost of the iphone 5 will be

Iphone 5 with 16GB memory = .99 cents. Full price is 499.99
Iphone 5 with 32GB memory = 149.99. Full price is 599.99
Iphone 5 with 64GB memory = 249.99. Full price is 699.99

Remember that you have to sign another 2 year contract. You will need to have a voice plan and data plan as well. If you do not wish to re-new your contract for another 2 years then you can always pay for the full price of the phone.