Will switching to HTTPS hurt my SEO?

Done correctly, it helps, HTTPS is a confirmed Google ranking signal. The risk is in a sloppy migration: if you don’t add proper 301 redirects from HTTP to HTTPS, update canonical tags, sitemap and internal links, you can temporarily lose rankings. Our HTTPS migration always includes server-level 301s, canonical and sitemap updates, and a base-URL change, so search engines treat it as the same site, no ranking drop.