The internet offers numerous affiliate programs that make it possible for one to generate a nominal source of income. Some of the types of affiliate programs found on the internet today are CPA, CPC, CPM and CTR. One of the affiliate programs, CPA is the acronym for cost per action. Pay per click affiliate program is another name for CPA.

This affiliate program is basically an online advertising payment model where payment is based on qualifying actions by the visitors like sales and registrations. These programs usually provide banners, buttons, text descriptions and other advertising means to generate action from the visitor, therefore making you money.

The word action in these programs generally defines some sort of conversion in the transaction. The most common conversions, as mentioned, are sales and registrations. However, deals that are based only on clicks are not included in this program as deals that take place through clicks are generally categorized under cost per click.

In fact, it can be considered that the cost per action model is opposite to the cost per impressions model while the cost per click model lies somewhere in between. In the CPA model, it is the publisher who takes most of the risk as the commission here is dependant on good conversion rate from both the website and the advertiser's creative units. This is unlike the CPM and CPC models where the publisher is not under as much of a risk.

There are several options for those interested in cost per action affiliate programs. The publishers with excess of an inventory usually opt for non-standard offers. There are sites that specialize in incentive programs; and these sites are capable of offering CPA pricing on different leads while keeping caveats of incentivized traffic in mind. However, affiliate marketing is today considered to be the most used form of performance based pricing. In this program, the merchants and advertisers can determine the action they intend to reward and the amount they are willing to pay for it.

A typical CPA affiliate program can be seen as an offer site that appears before the surfer is reverted to the actual site he or she wants to visit. The site usually has some kind of offer or service wherein the visitor may be compelled to fill out a form or click on a link. The process is called the action that the visitor must take in order for the publisher to get paid. On completing an action, the website owner that's affiliated with the CPA program pays the affiliate. This calculation is done based on the number of people who visit these affiliated programs.

You can generate a substantial income through CPA affiliate programs. If done properly, making money with CPA programs can be very rewarding.