How Much Does It Cost to Release a Song?

The parts of a release
A song release has a few separate costs: making the track, the artwork, getting it into streaming catalogs, and having a place where it can be found and sold. Each part can be free or paid, so the total depends on the choices you make, not on a single fixed price.
Recording and artwork
If you record at home and design simple cover art yourself, these steps can cost nothing beyond time. Hiring a mixing engineer, a mastering service, or a designer adds cost, but none of it is required to release. Many first releases are made entirely with free tools.
Streaming distribution
Getting a song into Spotify and Apple Music requires a distributor. Some offer free tiers, while others charge a per release or yearly fee, or take a percentage of royalties. This is usually the one part of a release that may cost money, so compare terms before you choose.
Publishing a findable home for free
Having a public page where your song can be found, followed, and bought does not need to cost anything. A free Yesodi page lets you publish the song, tell its story, and sell it directly, with no hosting bill. This covers the discovery and direct sales side at zero cost.
A realistic budget
A fully free release is possible: home recording, self made art, a free distribution tier, and a free findable page. Spending more buys polish and convenience, not permission. Start with what you can afford and reinvest what you earn into the next release.