Close companions (ρ < 1.″55) to the TESS planet candidate hosts detected by SOAR speckle imaging, in terms of their I-band magnitude difference and separation from the primary star. The average 5σ detection limits of the observations are plotted, trending from black (no observations are sensitive to binaries with that combination of separation and contrast) to white (all 542 observations are sensitive to that combination). The yellow dashed line shows the median sensitivity for the survey.