Non-denominated postage is postage intended to meet a certain postage rate that retains full validity for that intended postage rate even after the rate is increased. It does not show a monetary value on the face. In many English speaking countries, it is called no-value indicator (NVI) postage.

Invented to cope with the cost of printing large issues of low-value stamps to "top-up" old issues, this type of postage has been employed by a growing number of countries in recent years. Among the countries now issuing it are Britain, Singapore, Finland (and Åland), Israel, Belgium, France, Norway, Monaco, Sweden, Canada, and the United States.