Emergency funds: How much is enough?

Dear Liz: A lot of financial advice sites say you should have an emergency fund equal to three to six months of living expenses. What would be considered living expenses? Should you use three to six months of your net take-home pay or a smaller number? Is three to six months really enough?

Answer: Let’s tackle your last question first. The answer: No one knows.

It’s impossible to predict what financial setbacks you may face. You may not lose your job — or you may get laid off and be unemployed for many months. You may stay healthy — or you may get sick and your only hope might be experimental treatments your insurance doesn’t cover. Nothing may go wrong in your life, or many things could go wrong all at once, depleting even a fat emergency fund.

Having a prudent reserve of cash can help you survive the more likely (and less catastrophic) setbacks. Financial planners suggest that your first goal be three months’ worth of living expenses, typically defined as the bills that can’t be put off without serious consequences. That would include shelter, utilities, food, transportation, insurance, minimum loan payments and child care. Any expense that you easily could cut or postpone wouldn’t be included.

If you work in a risky industry or simply want a little more security, you can build your fund to equal six months of essential living expenses, or more. (The median duration of unemployment after the recent recession peaked at around five months, although many people were out of work for far longer.)

It can take many months, if not years, to build up even a three-month reserve. In the meantime, it can be prudent to have access to various sources of credit, including space on your credit cards or a home equity line of credit.

No matter how eager you are to have a fat emergency fund, you shouldn’t sacrifice retirement savings. For most people, saving for retirement needs to be the financial priority, with saving for other purposes fit in as you can.