September can feel like a financial reset, with summer ending and the holidays still seemingly far away. That makes it easy to build a September budget around bills and school costs while overlooking one category that can prevent a year-end scramble. The missing line is a seasonal expenses fund, sometimes called a sinking fund, for predictable costs that do not arrive every month. Think gifts, fall activities, annual renewals, colder-weather needs, maintenance and travel. Adding this category now turns expenses that feel unexpected in November or December into costs you have already started paying for.
