The best time to get a spare key made is immediately when you buy a vehicle, particularly a used car that has come with only one key. The second best time is right now, before the single key you have is lost, damaged or worn.
If you have recently bought a used car with one key, or if you are running your vehicle on a single key and have been meaning to get a spare, this is the job that costs the least to resolve today and the most to leave until something goes wrong.
