Sinking Funds: Never Be Ambushed by December Again

December is not an emergency. Neither is your annual insurance premium, your car registration, or your kid's birthday. They are scheduled, predictable, and — for most households — completely unfunded.

The fix is the sinking fund: an envelope you fill a little each month for an expense you know is coming.

Build the list

Walk through a calendar year and write down every irregular expense:

Expense	Annual	Monthly
Holidays & gifts	$1,200	$100
Car registration & maintenance	$900	$75
Insurance premiums	$1,400	$117
Birthdays	$600	$50
Annual subscriptions	$360	$30
Home & appliance repairs	$1,200	$100
Total	$5,660	$472

That $472 is not new spending. It is spending you were already doing — you were just doing it with a credit card in a panic.

Start mid-year without guilt

If it's July and you want $1,200 by December, that's $240/month for five months. Too much? Lower the holiday target now, in July, when you can still plan a smaller celebration gracefully.

Keep them separate from the emergency fund

Sinking funds are for known costs. The emergency fund is for unknown ones. Mixing them means every Christmas looks like an emergency.

Roll over the leftovers

Underspend on car repairs this year? Leave it. Next year's transmission thanks you.

The payoff

Households that run sinking funds report the same thing: January credit card statements stop being scary, and holiday spending stops being a source of conflict. The money was always going to be spent. Sinking funds just move the decision to a calm month.