In general, interior paint will last from 5 to 10 years. You can expect your exterior paint to last between 5 to 7 years. Keep in mind that your exterior paint will be affected by regional climate conditions, the material painted, and the type of paint used.

How can you tell if paint has gone bad?

Rancid- or Sour-Smelling Paint

After the lid is opened, some paint might have a sharp smell: rancid, foul, or sour. Other paint might smell like mold or mildew. If the smelly paint is applied, the smell may lessen but not disappear.

How long does paint last for once opened?

Regardless of paint type, an open can of paint lasts around two years without spoiling if sealed tightly and stored in a cool, dry place. If you do not use the paint within two years of opening, you'll need to test to see if it is still good. It is possible to use paint older than two years, but it is not recommended.