Start by heating your oven to 375 degrees Fahrenheit so it's fully ready when the chicken goes in. Remove any giblets from inside the cavity and set them aside or discard them. Pat the chicken completely dry with paper towels, since damp skin will steam instead of crisp.
In a small bowl, combine the salt, black pepper, paprika, onion powder, garlic powder, thyme, oregano, rosemary, and cayenne if you're using it. Give it a good stir so every spice is evenly distributed. This blend is really what makes the chicken taste like the Costco version.
Rub the olive oil all over the outside of the chicken and just inside the cavity. Then take your spice mix and massage it over the skin, under the skin, and inside the cavity too. Don't be shy here, since a generous coating is what gives you that bold, salty crust.
Tie the legs together with kitchen twine so the chicken holds its shape while roasting. Tuck the wing tips underneath the body to keep them from burning. This little step helps the chicken cook more evenly from end to end.
Place the chicken breast side up in your roasting pan and slide it into the oven. Roast for about 1 hour and 20 minutes, checking the thickest part of the thigh with a meat thermometer near the end. You're looking for an internal temperature of 165 degrees Fahrenheit.
Once it's done, pull the chicken out and let it rest for about 10 minutes before you cut into it. This resting time lets the juices settle back into the meat instead of spilling out onto the cutting board. Carve it up and serve while it's still warm.