Family-centered values are important for caregiving. However, findings on their association with burden are inconsistent. We aim to analyze whether positive aspects of caregiving are mediating the effect of familism on burden among informal caregivers of older adults in Germany. Participants (n = 277) were drawn from theAttitudes Toward Informal Caregivers (ATTIC) project and include informal long-term caregivers of older relatives (aged ≥ 60) quota-sampled from Germany (December 2023). Mediation analyses (linear OLS regression) with robust standard errors were conducted with the classic and the counterfactual causal mediation framework. The classic approach indicated a significant positive direct effect of familism on burden, a significant negative direct effect of PAC on burden and a significant negative indirect effect of familism via PAC on burden; the total effect was not significant. The causal mediation approach supports this; the interaction between familism and PAC was not significant. Thus,sociocultural family-centered values seemed to worsen burden but also toreduce it through positive experiences of caregiving, which did not depend on the strength of familism values. The findings advance our understanding of the mechanisms underlying the stress appraisal of the informal care situation and emphasize the role of positive experiences of care.