How long do sausages last in the fridge once they are cooked? Cooked sausages will usually stay good for 3 to 4 days in the fridge and 4 months in the freezer. How to tell if raw sausages are bad? The best way is to smell and look at the sausages: signs of bad sausages are a sour smell, dull color and slimy texture; discard any sausages with an off smell or appearance.