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Saving, 4 min read

Sinking funds: stop being surprised by irregular bills

Car insurance, holidays, birthdays and annual subscriptions aren't emergencies. They're just bills that don't come monthly.

Some months wreck your budget for reasons that weren't really surprises: the annual software renewal, a friend's wedding, the December gift run. A sinking fund turns each of those into a small monthly amount.

How it works

  1. List costs that come once or twice a year and roughly what each costs.
  2. Divide each one by the months until it's due.
  3. Save that amount every month into a separate pot or goal.
  4. When the bill arrives, pay it from the pot. Your normal month doesn't feel it.

A $600 holiday-gifts budget in eight months is $75 a month. A $480 annual insurance renewal is $40 a month. Neither feels like much, and December stops being a crisis.

Common sinking funds

  • Travel and holidays
  • Gifts and celebrations
  • Annual subscriptions and memberships
  • Car or bike maintenance
  • Tech replacements: your phone and laptop will die eventually
  • Moving costs and deposits

Example amounts are scaled to typical incomes in your chosen currency. This guide is general education, not personal financial advice.