It is not well understood how people derive a sense of agency (SoA) over their actions and associated outcomes. The temporal binding (TB) effect, the most widely used implicit measure of SoA, is defined as the perceived subjective compression of the time interval between a voluntary action and its associated outcome relative to the perceived interval between two passively observed events. Recent evidence suggests TB is a methodological artifact, raising questions regarding its apparent link to SoA. We further contribute to this questioning by investigating whether the TB effect is consistently present at the individual level. To do so, we reanalyzed 10 TB data sets to reveal consistent individual variability in the empirical signature of the TB effect. To rule out measurement noise as an explanation, we implemented a Bayes factor mixed method modeling approach (Haff & Rouder, 2017) which simulated participant true effects (accounting for sampling noise) from 2 temporal binding data sets. This confirmed that up to 40% of individuals in the sample have true effects in the opposite of the theoretically predicted direction. These results implicate both the theories posed to describe TB as well as the use of TB in applied contexts.