It is no problem for you to pay the annual patent fee before September 27th. If the annual patent fee is postponed, the annual patent fee can be paid on the premise of paying the late fee. The longest extension can be 9.27+6 months, but for each month of extension, the late payment fee will increase by 5%, with a maximum of 30%.
At the same time, remind you that future annual fees should be paid in advance within one month before the expiration of the previous year. More questions about patent fees can be found at/news-19.html.