Yater, you must not do 12 month contracts where it's 1 flat rate every month no matter what do you?
I do not plow, I sub it to a buddy who plows for himself, however I charge them the same rate every month no matter what. Take the total cost and divide by 12, it's that simple. However many cuts, shrub maint (if wanted), 6-8 plowable events(if wanted) , spring clean up, fall clean up, and a couple mulch installs (if wanted), add it all up and you get your total price, divide by 12 for a monthly payment and the customer agrees. It also works great for customers that just want mowing and spring/fall clean ups to have a 12 month contract because they're rate is cheaper each month, in layman's terms, spring clean up in april, mowing late april-late oct, and fall clean up in nov, about 6.5 mnths of work, however if they are on a budget, they can pay it through the winter months, it's a great plan. That also is the beauty of the contracts, you get paid no matter what, even if you don't have to do anything.