That would be normal if you are leased to a carrier with which you must deadhead back to a small geographic area where all the carrier's customers are situated. Some of the smaller carriers operate this way, but the larger carriers with nationwide customer bases will move you from point A to B to C to D and perhaps back to point B, etc. In the latter example, your deadhead will be minimal compared top your currnet operation.
If you would share your truck size, carrier and typical run pay per mile, there would surely be someone here that will share the typical for your situation. For example, If you are in a D, or large straight truck, and are getting $3.00 per loaded mile, then you can afford the deadhead. If you are getting $1.20 per loaded mile in the same truck, you're headed for the poorhouse at your current milage