Someone always suggests it. We should bid on their brand name. It feels decisive, it is easy to set up, and in most accounts I have looked at it quietly loses money for a year before anyone checks. It can work. It works far less often than people expect, and the conditions that make it work are specific.
When a person searches a competitor’s brand name, they have already made a decision. You are not competing for an open question, you are trying to reverse a conclusion, in the two seconds before they click the result they came for.
The auction punishes you for this. Your ad and landing page are less relevant to that query than the brand owner’s, so you pay more per click for a worse position. Meanwhile the brand owner is paying very little to defend their own name. That is the structural asymmetry: your attack costs more than their defense.
Expect a low click-through rate, a high cost per click, and a conversion rate well below your normal campaigns. If your model does not survive all three at once, do not start.
Do not do it if your product is roughly interchangeable with theirs and you are competing on nothing but preference. You will pay premium prices for people who type your competitor’s name and then bounce.
Do not do it if you are a small brand attacking a much larger one on the strength of the ad alone. The person searching a large brand name knows what they are getting. A stranger’s ad above it does not change that.
Do not do it if your budget is tight enough that this competes with your core commercial keywords. Buying your own category terms is always the better use of a constrained budget. Competitor bidding is a thing you fund with money you already have, not money you take from what works.
And do not do it as revenge. That is the most expensive motivation in advertising and it is remarkably common.
Before buying their name, look at the searches where people are comparing without naming anyone: alternatives to, versus, best X for Y. These have the same competitive intent, cost less, and you are not fighting a brand owner with a structural advantage. Pair that with a genuinely useful comparison page and you get most of the benefit at a fraction of the price.
Also worth doing first: make sure you are defending your own brand properly. Losing your own name to a competitor while you spend on theirs is a bad trade and it happens more than you would think.
Search your top three competitors’ names right now and see who is bidding. If nobody is, ask why. If several are, understand that you are entering a crowded, expensive auction. Then write down one provable difference you could put in a headline. If you cannot write it in ten words, you are not ready to run this. If you want an outside view on whether the math works for your business, book a free consultation.