This paper incorporates market-based inflation expectations to the growing literature on trend inflation estimation, and finds that there has been a significant decline in euro area trend inflation since 2013. This finding is robust to using different measures of long-term inflation expectations in the estimation, both market-based and surveys. That evidence: (i) supports the expansion of ECB’s UMP measures since 2015; (ii) provides a metric to monitor long-term inflation expectations following their introduction, and the likelihood of a sustained return of inflation towards levels below, but close to, 2% over the medium term.