At the moment, your monthly Seller Performance Evaluation applies to listings in the same month as the evaluation. Starting in July, the consequences of evaluations will apply to listings in the month after the evaluation. The transition to the new timelines will begin on the 20 June evaluation.
Seller Performance Evaluation timelines.
For more information on all of these changes, including changes to the eBay Premium Service Badge evaluations, please go to our dedicated Seller Centre page.