The Bureau of Labor Statistics recently conducted a large scale feasibility test for the Consumer Expenditure Survey of an online diary as an alternative mode for expenditure data collection to the current paper diary mode. In addition to collecting reported expenditures, the new online diary also captured paradata from the respondent’s web experience. The paradata included: login attempts, frequency of use, time spent in the diary, type of device and operating system used, and use of special design features of the diary. The online diary was used during the pandemic and subsequently implemented into the main Diary Survey. Analysis of paradata from the large scale feasibility test and a few months of data from the Diary survey provided insights on the usability of the online diary and was used to identify future changes that may be needed to the diary design and placement protocols. This presentation is of particular interest to survey methodologists and researchers involved in online data collection.