We all need an emergency fund, but what's considered "an emergency?" Any unexpected hit to your finances, including layoffs, unanticipated illnesses, and natural disasters. Car insurance premiums and regular home maintenance are (or should be) anticipated, so they're not emergencies. The same is true of credit card bills for vacations and visits to the dentist's office. An emergency fund is designed to keep your life intact during temporary setbacks and to help you avoid unnecessary debt.