The NIR DR1-Foundation data processing is described in detail in the Euclid Data Release Q1 - NIR processing and data products article. The NIR PF has been updated for DR1 and the modifications are described in Euclid Data Release 1 (DR1). Near-infrared processing and data products. A detailed investigation of the NIR astrometric calibration is given in Euclid Data Release 1 (DR1). NIR astrometric calibration. The NIR PSF model is studied in Euclid Data Release 1 (DR1). NISP-P point-spread function modelling pipelines. Finally, the persistence model of the NISP detector has been updated for DR1, it is described in Euclid Data Release 1 (DR1). Persistence in NISP detectors