How do you calculate your emergency fund ratio?
Divide the cash you can reach within a few days by your essential expenses per month. The result is the number of months your savings would cover if your income stopped: $9,000 ÷ $3,000 = 3.0 months. The common target is three to six, the range FINRA says financial planners often recommend. Count savings, money market funds and the part of your checking account that is not already needed for this month's bills; leave out retirement accounts and credit limits.
The formula
Emergency fund ratio = liquid savings ÷ essential expenses per month
- Liquid savings is money you can use within a few days without a penalty or a loss: a savings account, a money market fund, cash above what your checking account needs for the current month.
- Essential expenses are the costs that keep running if your paycheck stops: housing, utilities, groceries, insurance, transport and minimum debt payments. Eating out, streaming and shopping stay out, because you would cut them.
Personal finance courses sometimes call the same figure a liquidity ratio. Some versions use your full monthly spending instead of essentials; that gives a lower, stricter number. Pick one version and keep it, so the ratio means the same thing each time you check it.
Worked example: Riley's ratio
| Account | Balance | Counts |
|---|---|---|
| High-yield savings | 6,400 | 6,400 |
| Money market fund | 2,000 | 2,000 |
| Checking ($1,200 still needed for this month's bills) | 1,800 | 600 |
| 401(k) | 14,000 | 0 |
| Unused credit card limit | 5,000 | 0 |
| Liquid savings | 9,000 |
Riley's essential expenses are $3,000 a month, all spending including the extras $4,100.
- On essentials: $9,000 ÷ $3,000 = 3.0 months.
- On full spending: $9,000 ÷ $4,100 = 2.19, so 2.1 months.
Ratios here are rounded down, so you never read more coverage than you have. Riley is at the lower end of the usual range. Reaching six months of essentials ($18,000) would take another $9,000.
Calculate your ratio
What your ratio means
| Ratio | What it means |
|---|---|
| Below 1 | One bad month would push you into debt. A first goal of one month of essentials helps most. |
| 1 to 3 | A surprise bill is covered; a lost job for long is not yet. |
| 3 to 6 | The range FINRA says planners often recommend. |
| Above 6 | Fine for irregular income or a job that takes long to replace; otherwise, money beyond that may work harder paying off high-interest debt or for retirement. |
Common mistakes
- Counting money that is already spoken for. The rent sitting in checking until the first is not emergency money.
- Counting retirement accounts or credit. Withdrawing from a 401(k) early usually costs taxes and a penalty, and a credit card turns an emergency into debt.
- Counting money saved for planned costs. Money in a sinking fund for Christmas or car insurance is already promised; leave it out.
Follow-up questions
What is a good emergency fund ratio? Three to six months of expenses is the common guideline. We go through who should aim higher in how much should be in your emergency fund.
Is the three to six months a CFPB rule? No; the CFPB names no number of months. We compare the sources in does the CFPB recommend three to six months.
Sources: FINRA, "Start an Emergency Fund". Riley's figures are illustrative.
Disclosure: Still Penny makes the All-in-One Budget Planner App Bundle (19.90 EUR, one-time purchase on Etsy). Its Goals & funds module tracks an emergency fund next to your sinking funds, budgets and bills. It runs offline in a computer browser, not on phones. It is optional: the calculator above is free.
General information, not financial advice.