Sort of - some of my work is iffy - like I might get some extra work once or twice during the year and one of the families I work for (childcare) take a lot of vacations so instead of always working two days a week, every week, I will miss days here or there when they are gone. So I don't add in projected extra income and I take an average of 3 weeks a month with the one job and use that to plan my income for the year. This allows for some surprise extra income that usually goes to pay down debt, or gets added to the emergency fund. (I work other jobs too but they are extremely steady). Our expenses stay fairly steady (although some are increasing just because everything is increasing, ugh).
We also have a savings account for property taxes, insurances, annual repairs, car inspections, quarterly water and sewage bills, my dh's golf expenses, and a subscription to a nearby theatre. I add up what all that cost the previous year, divide by 12 and put that much away each month. I've been doing this for four years and it has been the best sanity saver - I actually used to be surprised by the car insurance bills or the property taxes and would get sick worrying about how we would pay them. Oh well, we learn from mistakes, lol.
What we do need to do is start saving for a new-to-us car or two because in the next few years we'll need to replace one vehicle at least. And I have promised myself that we would not take out any more car loans (and we'll try to to stick to that).