Question: In the *Supernatural* universe burying your photo with some hoodoo items at a crossroads summons a demon, said demon offers you a deal normally offers you a deal.

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> "You can have that thing you wanted, and in exchange for your soul in ten years.
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What if you die early? Does your soul go to hell anyway? Do demons prefer a soul ripped from its mortal coil, or does it not matter to them?

Answer: 
Yes it happens in one episode. Crowley gets furious with a demon who had made this kind of deal. He actually says:

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> *This isn't Wall Street, this is Hell. We have a little something called integrity.*
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[Link to YouTube](http://www.youtube.com/watch?v=nNAvGfh-Uvg)

If the human who did the deal dies before the deal time, the owner of the contract decides what to do; usually, they take the soul.

However the contract could also have a clause for such an eventuality.
They would be sent to Hell early if the demon holding their contract takes their soul. Most of the time that's the case. 

But sometimes, however, if the deed the crossroads demon promised as part of the deal is not fulfilled and the owner of deal dies, then the soul would not be taken to Hell.