Before you send anything, read the cancellation clause in your own membership agreement. Many gym contracts require written notice — commonly 30 days, and sometimes longer — before a cancellation takes effect. That means one or more additional payments may be charged after you send your letter, so the earlier you give notice, the sooner the billing stops.
Many states also have health-club or fitness-services laws that give members certain cancellation rights — for example, the ability to cancel within a short window after signing, or to cancel early after a move, a disability, or the gym permanently closing a location. These laws vary widely from state to state, so check your state’s specific rules and your contract rather than relying on a general summary. If one of these situations applies to you, note it briefly in your letter and keep any supporting documentation.
Whatever your notice period, the play is the same: send clear written notice, state the effective date, keep dated proof of delivery, and get the cancellation confirmed in writing. This page is general guidance, not legal advice — for a specific dispute, consult your agreement or a qualified professional.