An emergency fund doesn’t make car transmissions last longer, keep furnaces from breaking, or guarantee you’ll never lose a job. What it can do is change what happens financially after one of those problems arrives. The Federal Reserve’s latest household survey found that 59% of adults had at least one major unexpected expense in 2025, including vehicle, home, and medical expenses. Yet only 63% said they could cover a hypothetical $400 emergency entirely with cash, savings, or a credit card paid off at the next statement. Building a real emergency fund won’t eliminate life’s surprises, but it can make these eight financial problems far less destructive.