Overtime rarely announces itself. It arrives as ten minutes after closing, then a late handover, then one more hour during salary week. After a few months you are working far more than your contract says and you cannot explain where the hours went. Cutting overtime back is not about refusing work; it is about knowing your numbers and removing the reasons the extra hours keep appearing.
You cannot reduce what you have never measured. Write down your scheduled shift and the hours you actually worked, for three or four weeks. Most shift workers find a pattern: the extra time is not spread evenly, it clusters around certain days, certain handovers and certain weeks of the month. Shiftat-E helps here by recording your shifts and hours, planning your leave and comparing expected against actual hours, so the gap is visible instead of guessed at the end of the month.
Start with the cheapest fix: arrive on time rather than early, and leave once your handover is signed. Agree with your team that the handover has a fixed length, and keep it to facts. If a task is not yours, raise it once in writing instead of absorbing it in silence. Ask for the plan on peak days, not for sympathy. And check whether your unpaid time is documented at all, because undocumented extra hours can never be claimed, corrected or reduced.
A complaint about being tired gets a nod. A list showing that you finished late on nineteen of your last twenty-two shifts gets attention, especially when each line names a cause instead of a mood. Bring one page: dates, scheduled hours, actual hours and the reason. That reads as a proposal for a fix, not a personal problem, and it is much harder to answer with "we will look into it".
Some overtime is genuinely good: a short push at month-end for money you want, a project that puts you forward, a night someone covered for you last time. The goal is not zero overtime. It is overtime you chose, tracked and paid for, rather than overtime that happened to you. Log your shifts and hours with Shiftat-E and keep the choice in your hands. Get the app here: https://play.google.com/store/apps/details?id=com.q8dm.shiftate