How this calculator works
The target is simply essential monthly expenses × months of cover. Essential means the costs you cannot skip — rent or mortgage, food, utilities, transport, minimum debt payments — not your full lifestyle. The UK's MoneyHelper service suggests three to six months of essential outgoings; lean towards six or more if your income is irregular or you're the only earner.
The time-to-target maths deliberately assumes zero growth. An emergency fund lives in an easy-access savings account where the interest is modest, and building in optimistic growth would only flatter the answer. Any interest you do earn arrives as a small bonus.
Common questions
How many months should I choose?
Three months suits stable, salaried work where similar work is easy to find. Six or more suits self-employment, irregular income, a single-earner household, or dependants. If in doubt, start with three and revisit once you get there.
Should I count my full spending or just essentials?
Just essentials. In a real emergency you would cut the extras, so insuring your full lifestyle overstates the target and makes it discouraging. Count rent or mortgage, food, utilities, transport, insurance, and minimum debt payments.
Where should the money live?
In an easy-access savings account, separate from your everyday account — safe, reachable within a day, ideally earning a competitive rate. Not in investments, which can fall in value exactly when you need the money. Our emergency fund guide covers this in detail.
Should I build this before paying off debt?
Usually a small buffer first — about one month of essentials — then attack high-interest debt, then grow the fund to the full target. The starter buffer stops the next surprise expense from going straight back onto a credit card.
This tool is educational and not financial advice. Account protections and typical guidance vary by country.
- 1.Emergency savings: how much is enough? — MoneyHelper (UK)
- 2.An essential guide to building an emergency fund — US Consumer Financial Protection Bureau