We recommend an alignment check every six months or 6,000 miles, whichever comes first. Regardless, don’t let your vehicle go more than 10,000 miles without examining the alignment.
It’s a good idea to have your tires checked for alignment bi-annually, or anytime you have your tires rotated. Obviously, if your vehicle tracks straight on the highway, it most likely will be in proper alignment. If it veers left or right, that’s a clear sign it’s time for a checkup.
The other time you should absolutely have your tires aligned is when you replace them. Properly balanced and aligned when placed on your vehicle, this will ensure they wear evenly from the start. Placing new tires on an improperly-aligned vehicle will end up costing you more in the long run, because your new tires will continue to wear in the same manner as the previous set.