by Youssef El Beqqal · · Updated
Sinking Funds: Save for Expenses You Know
TL;DR
Sinking funds set aside a little money monthly for expenses that are predictable but not monthly - car registration, holiday gifts, annual premiums - so the bill never has to come out of a single month's budget all at once.
Some expenses aren't surprises at all - you know your car registration is due every year, you know the holidays are coming. And yet they still show up like emergencies, because nothing was set aside for them ahead of time.
The gap a monthly budget doesn't cover
A monthly budget is built around monthly expenses. Anything that happens once or twice a year - registration, an annual subscription, holiday spending, a birthday season - doesn't have a natural home in that structure, so it either gets forgotten or blows up whatever month it lands in. A sinking fund fixes that: a target amount, saved a little at a time, earmarked for a specific future expense.
Know the annual cost
e.g. $300/year car registration
Divide into a monthly amount
$300 ÷ 12 = $25/month set aside
Bill arrives, money's already there
Comes from the fund, not that month's regular budget
The same approach works for any bill that lands once or twice a year rather than every month, like insurance premiums or property tax.
Why this beats "I'll just remember to save for it"
Vague intentions to save don't survive contact with a normal month. A named target with a running balance does, because you can see it building and know exactly what it's for - it stops competing with everything else for the same dollars.
MoneyFlow's savings goals work exactly this way: name the expense, set the target and date, and watch the fund build automatically instead of hoping you remember in time.
