Before any of the longer-horizon questions, retirement, buying a house, investing more aggressively, most financial planning starts in the same place: a cash cushion for when something goes wrong. Our Emergency Fund tool helps you size that cushion against your actual monthly expenses; here's the reasoning behind the standard advice.
Why 3-6 months of expenses
The "3-6 months" range isn't arbitrary, it's roughly how long an unexpected disruption tends to last for most people. Job searches after a layoff commonly take a few months. A medical issue, a major car or home repair, or a gap in freelance income can all eat into a similar window. The fund isn't meant to last forever; it's meant to buy you time to respond without going into debt or liquidating long-term investments at a bad moment.
Crucially, the target is based on expenses, not income. What determines how long you can survive a disruption is what you have to spend, not what you normally earn, so the right first step is knowing your actual monthly expenses, not your salary.
Where your number should land in that range
A few things push your target toward the higher end of 3-6 months (or beyond):
- Variable or single-income households. If you're a freelancer, work on commission, or your household has one income, disruptions are more likely and the safety net matters more.
- Specialized or slow-to-fill roles. If your job search would realistically take longer than average, plan for that.
- Dependents. More people relying on your income means less room for a gap.
Things that can justify a smaller cushion:
- Very stable, in-demand employment with a fast expected re-hire timeline.
- Other accessible safety nets, a low-interest line of credit you'd actually be comfortable using as a bridge, or a second income in the household.
Where to keep it
An emergency fund's job is to be there when you need it, not to grow, so it belongs in something liquid and safe, like a high-yield savings account, not invested in the market. The opportunity cost of lower returns is the price of not being forced to sell investments at a loss during a bad month.
The Emergency Fund calculator takes your monthly expenses and a target number of months, and shows you exactly what to save for and, if you're building it up over time, how long that will take at a given monthly contribution.