In the frenzy to attain or maintain the highest ranking, it's easy to get caught up in keyword bidding wars. Don't give in to this temptation. There's a better way and it begins with finding a break even cost-per-click benchmark.

Cost-per-click the sensible way

Let's say that you sell golf clubs online. A set of golf clubs retails for $500. Your cost to manufacture or purchase the clubs is $300 per set. If you reserve an additional $100 per set for other operating expenses, you are left with $100 per unit to spend on marketing efforts such as cost-per-click campaigns.

Now assume that of every 100 visitors to your website, one visitor buys a set of clubs (a 1% visitor-to-customer conversion rate). You have $100 to spend to attract those 100 visitors, which translates into a $1 break-even per-click benchmark. If you exceed $1 per click, you will lose money. If you pay less than $1 per click, you will make money.

It's essential to understand this benchmark when buying cost-per-click advertising. When you know the conversion rates for each of your keywords, you'll be able to bid the appropriate amount - more for the keywords with higher conversion rates, and less for the keywords with lower conversion rates.

Now, let's look at this in action. The Google Analytics Revenue per Click (RPC) metric can give you insight into how much you should spend per click on a given keyword or cost-per-click campaign. You should not assume that Revenue per Click by itself provides the correct number for your business. Revenue per Click assumes that you can spend 100% of your revenue on cost-per-click advertising. Since you will want to factor in your production and business operating costs, you should consider what percentage of your revenue you can actually spend on cost-per-click advertising, and adjust your bid accordingly.

For example, let's say that you have an RPC of $11.66 per click for "beginner golf tips". If you can spend 10% of your retail price on cost-per-click advertising, your actual bid should be 10% of $11.66 or $1.16 per click. Spending more than $1.16 per click for this keyword would cause you to lose money. Spending less than $1.16 per click for this keyword would result in profit.