Distribution of the median offsets between stars in KiDS DR5 tiles (in the magnitude range 16.5 < r < 19) and their counterparts from SDSS imaging, for tiles with 10% or more unmasked data. The offsets here were calculated after SLR corrections and Gaia recalibration, and therefore represent the final quality of photometry in the survey. Horizontal dashed lines demonstrate the systematic zero-point uncertainty that is included per-band in our scientific analyses (such as in the computation of photo-ɀ), which are designed to encapsulate any residual systematic variation in the photometry (such as can be seen as a function of RA, and whose origins are unclear).