Depends on how much you shred. I used to kill a shredder a year. Each time I replaced the dead one, I bought a more heavy-duty model. Didn't make a difference – in a year (or less), it was broken. Not to mention the mess it made when emptied. So I gave up and started having a shredding service come in when I'd accumulated enough shredding to make it worthwhile. I kept one in the office for highly sensitive documents, but didn't use it much.