If your company keeps 70% of your customers each year (70%+10%), then you are doing B grade work (80% retention). At Tanner Pest Control, each year we only lose 15% of our customers. With the 10% margin of error we are only losing 5% of our customers. 95%! That's an A rating! Next to safety, customer loyalty is one of our highest priorities. There's no wonder why we have such a high online presence with the Better Business Bureau and plenty of 5 star rankings.