When repairing your garage door cables expect to pay between $130 to $400 depending on the parts that are needed for the repair. If your garage door cable snapped it might mean the the brackets are damaged as well. In some cases the drums at the top of the garage door where the cables loop around when the garage door is opening which might make the repair a little more pricey. Your best bet would be to get a professional garage door repairman to inspect your cables and get your repair done the same day.