Key takeaways
- Size the fund on essential monthly expenses, not income and not total spending.
- $3,000 of essentials a month → $18,000 for six months. $5,000 → $30,000. $8,000 → $48,000.
- Three months suits a dual-income household in a stable field; six is the default; eight to twelve suits single earners, commission or contract income, and anyone within a few years of retirement.
- Saving $500 a month reaches a $24,000 target in about 45 months once a 4% high-yield account is doing part of the work — 48 months without it.
- Keep it somewhere boring and instant: a high-yield savings account, or a short CD ladder for the portion you are unlikely to need this quarter.
What counts as an essential expense
An emergency fund covers the version of your life where income has stopped. That is a smaller number than your normal spending, and writing it down honestly is most of the work:
- Housing — rent or mortgage, property tax, condo or HOA fees.
- Utilities — power, water, heat, internet, phone.
- Food — groceries at a normal weekly shop, not restaurants.
- Insurance — health, auto, home or renters, life. Health cover is the one that gets expensive fast if employer coverage ends.
- Transport — car payment, fuel, transit pass, essential maintenance.
- Minimum debt payments — the minimums, not the accelerated payoff you make in good months.
- Childcare and medication — whatever cannot simply be paused.
What does not belong: holidays, subscriptions you would cancel, dining out, gifts, hobby spending, extra debt payments, and retirement contributions. Those are the 20–30% that disappears the week a job does.
The table
| Essential expenses / month | 3 months | 6 months | 8 months | 12 months |
|---|---|---|---|---|
| $2,000 | $6,000 | $12,000 | $16,000 | $24,000 |
| $3,000 | $9,000 | $18,000 | $24,000 | $36,000 |
| $4,000 | $12,000 | $24,000 | $32,000 | $48,000 |
| $5,000 | $15,000 | $30,000 | $40,000 | $60,000 |
| $6,000 | $18,000 | $36,000 | $48,000 | $72,000 |
| $8,000 | $24,000 | $48,000 | $64,000 | $96,000 |
The arithmetic is deliberately trivial — months × essential expenses. What is not trivial is picking the number of months, and that is where most of the real difference sits.
How many months do you actually need?
- Three months. Two stable incomes, no dependants relying on one of them, a skill in demand, no self-employment. Three months is a floor, not a target — it is roughly one hiring cycle.
- Six months. The default for most households, and the answer to "how much should I have saved." It covers a normal job search with a margin for the first month of severance paperwork.
- Eight to twelve months. Single-income households, commission or contract earners, business owners, anyone in a specialised field where the next role takes longer to find, and anyone with a variable-income spouse. Twelve is also the sensible number if a large deductible or an older home means a five-figure surprise is plausible.
- Two to three years, in retirement. Once you are drawing from a portfolio the fund stops being a job-loss buffer and becomes a market buffer, so it is sized in years of spending rather than months. That is the cash bucket in the bucket strategy, and it exists to stop you selling into a downturn — see sequence of returns risk.
How long it takes to get there
Target divided by monthly saving, with interest shortening it a little. A $24,000 target:
| Saved per month | In a 0% account | At 4% APY |
|---|---|---|
| $300 | 80 months | 71 months |
| $500 | 48 months | 45 months |
| $750 | 32 months | 30 months |
| $1,000 | 24 months | 23 months |
| $1,500 | 16 months | 16 months |
Four years is a long time to stare at an unfinished goal, which is why the useful move is to break it up. One month of essentials is the first milestone and it removes most of the day-to-day fragility. Three months is the second. Six is the destination.
Where to keep it
Two requirements, in order: you can reach it within a day or two, and its value does not fall when you need it. That rules out stocks and anything with a lock-up, and it argues against a chequing account paying nothing.
- A high-yield savings account for the whole fund is the simple, correct answer for most people. Fully liquid, federally insured up to the limit, and currently paying enough to roughly keep pace with inflation.
- A short CD ladder for the back half. Keep two or three months liquid and ladder the rest at three- or six-month spacing so a rung matures regularly. That earns a locked rate without ever needing to break a CD early — the CD ladder calculator builds the schedule.
- Not in a retirement account. Pulling from an IRA or 401(k) before 59½ adds a 10% penalty to the income tax, which is the most expensive possible way to handle an emergency. The withdrawal tax calculator puts a figure on it.
Mistakes that make the fund useless
- Sizing on gross income. Six months of a $90,000 salary is $45,000; six months of that household's essentials is often closer to $24,000. The gap is years of saving spent on the wrong target.
- Forgetting health insurance. If your cover is through work, the post-employment premium is a new essential expense that appears exactly when income stops.
- Investing it. The emergency and the market downturn tend to arrive in the same month; that correlation is the entire argument for cash.
- Never refilling it. A fund spent on a car repair and not rebuilt is a fund you no longer have. Restarting the transfer is the last step of every emergency.
Size yours
The emergency fund calculator takes your essential monthly expenses and the months of cover you want, and shows the gap between the target and what you have today plus how long it takes to close at your saving rate. From there, savings rate shows what is left over for everything else.
Frequently asked questions
How much is a 6-month emergency fund?
Six times your essential monthly expenses. At $3,000 a month of essentials that is $18,000; at $4,000 it is $24,000; at $6,000 it is $36,000. Use essential expenses — housing, utilities, food, insurance, transport and minimum debt payments — rather than income or total spending, which typically overstates the target by 20 to 30 percent.
Should an emergency fund be based on income or expenses?
Expenses, and specifically essential expenses. Income is the wrong basis because it includes tax, retirement contributions and discretionary spending you would stop immediately. A household earning $90,000 gross might need $24,000 for six months rather than the $45,000 an income-based rule would suggest.
Is a 3-month emergency fund enough?
It is enough for a two-income household in a stable, in-demand field with no dependants relying on a single earner. For a single-income household, commission or contract income, or a specialised role where a job search takes longer, six to twelve months is the safer range.
How long does it take to save a 6-month emergency fund?
Divide the target by what you can save each month. A $24,000 target takes about 48 months at $500 a month, 24 months at $1,000, and 16 months at $1,500. A 4% high-yield savings account shortens the $500 case to roughly 45 months. Hitting one month of essentials first removes most of the day-to-day fragility.
Where should I keep my emergency fund?
A high-yield savings account for the whole amount is the simple answer: fully liquid, federally insured, and paying enough to roughly keep pace with inflation. Some savers keep two or three months liquid and put the rest in a short CD ladder. Never keep it in stocks or in a retirement account you would have to pay a penalty to reach.
See the fund inside the whole plan
An emergency fund is one line of a household balance sheet. Planomy puts it next to the debts, the retirement accounts and the projection, so you can see what holding more cash costs you and what it protects. Free, private, and running in your browser.