Koho has two types of products: one-time charges and periodical products. These two types behave differently on billing contracts. One-time charges are billed only once whereas periodical products can be used for recurring billing, e.g. for charging the customer once per month. The icon before the product’s name tells whether it is a one-time charge or periodical product. 




In the example above, pay slip is a one-time charge and payroll computation is a periodical product. 


If you want to create a periodical product, choose the option "Periodical" for your product: 




If you want to create the same product with a different type, you can copy the product and change the type which will create an identical product with the different type.