Deli meat that has not been opened can last as long as 1 to 2 weeks in the refrigerator depending on the type of meat.
If the deli meat has been opened then the deli meat will only last as long as 3 to 7 days before it goes bad in the refrigerator.
If you want to keep the deli meat longer than a few days though once opened you should freeze it instead of refrigerating it.
If you freeze the deli meat the deli meat should last up to a year before it loses it's quality and taste.
The frozen deli meat will still remain safe to eat well after a year because the freezer temperatures keep the meat from growing bacteria.
However the longer the deli meat stays in the freezer the less fresh it becomes so it won't be as enjoyable as when fresh.
It's best to eat the frozen deli meat within 6 months of freezing it.