This is a really difficult question to answer, because it depends on how they're used and how they're cared for. As studio owners we are in the fortunate position of being able to see how are ropes break in, how they age with use and roughly when they get worn out to the point of needing to be replaced. We have some people who tie regularly who still use a set of our ropes from five years ago. You should expect your ropes to last for about three years before needing to be retired. There are however a few other factors that will affect this. If you only do floor-work, then the ropes will last much longer. You can significantly increase the lifespan of your jute ropes by maintaining them regularly. This includes ensuring the rope is hydrated (with a suitable treatment oil) and also straightening twists that appear near the bight. If you have the space, leave your ropes to hang at least once per month.