noun
initiation fee; registration fee; sign-up fee
A one-time fee paid when joining an organization, club, gym, or similar group.
このジムは入会費が無料です。
This gym has no initiation fee.
入会費と年会費が別にかかります。
The initiation fee and annual fee are charged separately.
月会費 is a monthly membership fee, distinct from the initial 入会費.
Compound of 入会 (にゅうかい, 'joining') + 費 (ひ, 'fee').