Annual Bills Sinking Fund: Property Tax, Insurance, and Renewals on iPhone

Monthly rent fits mental math. Annual bills do not—until a $1,200 insurance payment or property tax installment lands the same week as travel. A sinking fund on paper (or in a bill app) turns spikes into quiet monthly transfers.

List true annual and semi-annual costs

Common entries:

Home or renters insurance (annual or semi-annual)
Auto insurance renewals
Property tax installments
HOA or condo fees
Domain renewals, professional licenses, union dues
Amazon Prime / annual software you keep

Skip monthly-subscription noise here—that is a different audit.

Record exact renewal month and typical amount

For each line:

Due month (and day if fixed)
Last paid amount (not guesswork)
Payment method (escrow, card, check)
Auto-pay yes/no

Semi-annual bills get two calendar pins per year.

Divide by twelve (or by pay periods)

Example: $1,440 annual auto insurance → $120/month set-aside in a labeled savings bucket or mental “bills only” account.

Irregular income? Use a conservative average month and catch up in strong months.

Set reminders at 30 and 7 days

Annual bills love surprise:

30 days: verify amount changed, move cash if needed
7 days: confirm autopay or schedule manual pay
Day after: mark paid and note next year’s date

Same rhythm as monthly utilities—just longer horizon.

Escrow vs self-pay homeowners

If property tax is escrowed, you still want a reminder to review the statement when the lender pays. Errors happen; your record proves what should have been paid.

Pair with subscription audit yearly

Each January (or tax season):

Re-run annual list for new policies
Cut abandoned annual renewals
Update sinking fund totals

One sitting prevents October sticker shock.