I have this insurance. You can take it for a whole year or you can pick two month blocks.Your payments are calculated in 2 month intervals based on average rain fall. I've taken it the last five years. This will be the first year that it that it's going to pay any major amount of money. The good thing I can tell you is that it hasn't cost me much money the other years. My premium is about 14,000 a year and is due September the fifteenth. Any payment for rain shortages for months prior to that go towards paying your premium. I think I've owed money twice come September and it wasn't much then. After the phone call I had with my agent last week I'm looking forward to opening the check in the mail when it gets here. I would highly recommend this program. Hope this helps.