Re-do your annual budget if you sense something not good in your business. You might have spent more in the previous years, You might have hired additional employees despite they were complete. You have to make actual estimations and assumptions to avoid hitting the wrong budget. Also, re-do your annual budget based on different sales levels to determine your ability to withstand a decrease in sales per unit as based on the sales levels to determine if you will profit. You need to create accurate calculations and production regarding the overhead. Create budgets that automatically trigger spending changes when your sales decrease.