This disclosure describes, generally, methods and systems for implementing in-lane exception handling. The method includes displaying, on a user terminal display device, a first user interface (UI) configured to display application data in organized rows and columns, receiving, by a data management system, updates and/or edits to the application data, and calculating, by the data management system, the updated and/or edited application data. The method further includes analyzing, by the data management system, the updates and/or edits to determine one or more of associated errors, warnings, and exceptions, and displaying, within the first UI, a graphical representation for each of the errors, warnings, and exceptions in the row and/or column of the application data where the error, warning, or exception has occurred.