I'm sure I'm somewhat overanalyzing this but bear with me!
The concept of a sinking fund is to put in a little bit of money each month into a savings account in anticipation of an irregular expense in the future. If you have a $3,600 expense every year you would divide it by 12 and know that you need to save $300 each month so that you have the money ready when the expense happens.
Obviously you'll have multiple expenses fall into this bucket (e.g. Car repairs/tires, clothing, gifts, home repairs, vet bills, etc.). Maybe you don't need to use the fund every year for some of these things, but you still have the funds there and available (e.g. you budget $1,000 a year for new clothing and only spend $500). As a result that fund will continue to build over time.
My question is how would you differentiate this from an emergency fund when it comes to savings goals? After all, some things in the sinking fund could easily be considered emergency expenses in and of themselves (for example, we don't necessarily anticipate the car breaking down). Would it be wise to have two separate accounts: one with your 6 months expenses and one with your sinking fund? Or does it work just as well to have the sinking fund account and utilize that as your emergency fund should something come up (e.g. car breaks down and you have to pay $1,500 for repairs).
I'm struggling with this mentally for some reason that I can't quite grasp and would appreciate any opinions!