Inclusive J/$\psi$ $p_{\rm T}$-differential cross section for different centrality classes at backward (left) and forward (right) rapidity in p--Pb collisions at $\sqrt{s_{\rm NN}} = 8.16$ TeV. The vertical error bars, representing the statistical uncertainties, and the boxes around the points, representing the uncorrelated systematic uncertainties, are smaller than the marker. The global systematic uncertainty, which is correlated over centrality, rapidity, and $p_{\rm T}$ and is obtained as the quadratic sum of the systematic uncertainty of the branching ratio and the correlated systematic uncertainty of $\sigma_{\rm MB}$, amounts to 0.9\% (0.7\%) at backward (forward) rapidity and is shown as text.