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The frame sholud be able to be corrected, but depends.

If by an inch, you mean the forward frame horns are now shifted or offset an inch, repairable. If only one frame horn is pushed over, even better for a repair. The frame horns or extensions are designed to take/absorb the frontal impacts.
When the damage is forward of the cross member, straightening isn’t terrible hard, nor that expensive in most cases. If it’s a combo bend, meaning bent to one side, or multiples of, as well as a horizontal bend or twisting, then it’s much more complex to repair. The worst type of damage is when it’s hit hard on one frame side and the frame ‘diamonds’ or oblongs. Simple impact bends, generally are relatable.
If there’s multiple damage areas, sometimes sourcing a used frame is cheaper.
If it’s still drivable, you could run it by a frame shop and have them inspect it for a quote..