Quick answer: Irregular expenses become easier to handle when you estimate the annual cost, divide it into smaller monthly amounts, and save ahead in dedicated categories or sinking funds.
Find the expenses that hide between months
Review the last year for insurance premiums, vehicle maintenance, property costs, school expenses, gifts, holidays, memberships, medical deductibles, and annual subscriptions.
Convert annual costs to monthly targets
If an expense is roughly $1,200 per year, setting aside $100 per month turns a large future bill into a routine budget line.
Known expense or emergency?
An expense does not have to happen every month to be predictable. Routine car maintenance and annual premiums generally belong in planned savings rather than being treated as emergencies.
Next steps
Read the Sinking Funds Guide and use the Monthly Expenses Calculator.
Methodology and limitations
This guide explains general financial concepts and decision factors rather than prescribing one answer. Product terms, tax treatment, credit practices, rates, and laws can change. Verify current rules with the relevant financial institution, plan administrator, or government source before acting.
Reviewed September 26, 2026. General financial education only; not individualized financial, tax, legal, investment, or credit advice.