Monthly essentials
Last updated 3 September 2026
Why essentials, not total spending
An emergency fund is there to cover the months when income stops, and in those months your spending would not look like it does now. Subscriptions get cancelled, meals out stop, holidays are shelved. Sizing the fund against your full budget produces a target so large it never gets reached, which is its own kind of failure. Sizing it against essentials — housing, utilities, food, transport, insurance, minimum debt payments — gives a number that is both genuinely protective and actually achievable. Three months suits a stable job with a second income in the household; six is the common advice; freelancers and single-income households are usually better served by nine or twelve.
Where to keep it
An emergency fund has one requirement that overrides return: it has to be available on the day you need it, at full value. That rules out anything whose price can be down when the emergency arrives, and anything with a notice period or an early-withdrawal penalty. A high-yield savings account or an instant-access cash account is the standard answer, and the goal is to keep pace with inflation rather than to grow.
The common mistake is treating the fund as underperforming money and investing it. That works until a job loss coincides with a market fall, which is precisely when the two are most likely to happen together. Keeping it separate from your day-to-day current account matters too — an emergency fund sitting alongside ordinary spending money tends to be spent gradually without a decision ever being made.
Assumptions and limitations
What the maths does. It multiplies the monthly essential costs you enter by the number of months of cover you choose, and divides the shortfall by your monthly saving to estimate how long the fund takes to build.
“Three to six months” is a convention, not a rule. The right size depends on how stable your income is, how many people depend on it, whether you have sick pay or redundancy protection, and what your notice period looks like. Self-employed and single-income households usually need more; two stable salaries usually need less.
The target is only as good as your list of essentials. Costs people commonly leave out include annual insurance premiums, car maintenance, medical costs, and irregular bills that only arrive once or twice a year.
Inflation and interest are not modelled. The target is in today’s money, and any interest earned while saving is not counted.
Assumptions that apply to every finance calculator here
Currency is a display choice only. Changing the currency symbol relabels the output; it does not convert anything and no exchange rate is used anywhere in this tool.
Tax and lending rules vary by country. Nothing here is adjusted for the rules where you live — income tax, capital gains tax, stamp duty, lending caps, affordability tests and consumer-credit regulation all differ, and several of them can change the real answer materially.
Rates and returns are not guaranteed. Any rate you enter is treated as fixed for the whole period. Real interest rates move, real investment returns vary year to year and can be negative, and past performance does not predict future results.
This is an estimate, not advice. The result is arithmetic on the numbers you typed. It is not an offer, a quote, an approval, an investment recommendation or financial advice. Before committing to anything, get figures from the actual lender, provider or a qualified adviser in your country.
Common questions
How many months should I aim for?
Three months suits a secure job with another income in the household. Six is the usual advice for a single stable salary. Nine to twelve makes more sense for freelance, commission-based or seasonal income, where a gap can last longer and arrive without warning.
What counts as an essential expense?
Anything you would still have to pay if your income stopped tomorrow: housing, utilities, food, transport, insurance and minimum debt payments. Leave out subscriptions, dining out, holidays and anything else you would cut in that situation.
Where should the money be kept?
Somewhere you can reach within a day or two without penalty, which usually means an instant-access savings account rather than investments. The point of this money is availability, not growth — an emergency rarely waits for a good time to sell.
Is my information stored anywhere?
No. The calculation happens in your browser and nothing is uploaded or saved.