This is the most pressing question most new Google AdWords clients want to know before they put money down for our services, or for that matter input their credit card with Google. There is a good tool that AdWords has online that will shed light on what you may pay. But the figures in this tool should be considered a guideline and not the real verifiable price you will pay when your account is rolling.
Here is one of the online tools you can use to check the anticipated cost per click:
Google AdWords Traffic Estimator
To use the estimator, enter your keyword phrase, then select (on the right in the sorted by section) columns, and then select in the drop down to show CPC (cost per click). The information that is displayed shows you searches on a global basis and the estimated cost per click. This is great for identifying, before you start with AdWords, the range of pricing you may pay.
It is crucial to understand that in my experience I have rarely seen a client pay what is shown in this tool as the typical cost per click. In reality the cost per click when the account is running will be higher – sometimes 20% higher or more. So, use the information found in this tool as a guide and not a rule.
Why would the cost per click in an actual running account be different?
There are several reasons: quality score, market competition, targeting settings, and real-time auction competition. Remember, AdWords is an auction and the auction prices are decided in real-time at the moment the search query is entered. The keywords tool certainly cannot take into account all of the above listed factors when it shows your estimated pricing.