The price of an individual YouTube Premium subscription is increasing by $2 to $13.99 per month in the US for new and current customers.
This price increase is live for new subscribers as seen on youtube.com/premium. Instead of $11.99, YouTube Premium now costs $13.99/month. Meanwhile, it’s $18.99 if you’re subscribing from the iOS YouTube app.
Probably because it helps a bit to offset their high losses for infrastructure (servers, bandwidth, storage, compute for compression, search, indexing and backups, electricity, networking, employee wages)