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How to build an emergency fund in 3 months

4 min readM5

An emergency fund is the financial cushion that lets you absorb an unexpected event — an illness, a layoff, a car repair — without going into debt or touching your long-term savings. The general rule says you should have between 3 and 6 months of fixed expenses saved in a safe, liquid place. Without that cushion, you are one unexpected event away from a financial crisis. Here is how to build it in 90 days.

How much you need exactly

Add up your fixed monthly expenses: rent or housing payment, utilities, food, transportation, school fees, and any debt you must pay no matter what. Do not include discretionary spending (clothing, entertainment). That number multiplied by 3 is your minimum emergency fund target. If you earn variably or depend on a single income source, aim for 6 months. An employee with stable work may be fine with 3 months; a freelancer should have 6.

The 3-month plan

Month 1: Calculate your exact target and open a separate account just for the emergency fund (a different bank from your main account helps keep it untouched). Automate a fixed transfer on the day you receive income — even if it is just 5% of what you earn. Auto-saving works because it removes the decision. Month 2: Find one temporary extra income source (selling things, freelance work, overtime) and direct 100% of it to the fund. Month 3: Review your subscriptions and recurring expenses — typically $100,000–$300,000 per month goes to services you barely use. Redirect that money to the fund.

Where to keep the fund

The emergency fund is NOT for risky investing. It needs two qualities: safety and liquidity. The best options in Colombia are: a high-yield savings account (some fintechs offer 6–8% per year with daily liquidity), or a 30-day CD that auto-renews. Do not put it in stocks, variable-income funds, or cryptocurrency — you might need it exactly when the market is down.

The rules of the fund

Rule 1: Only for real emergencies (not vacations, not discounts, not "opportunities"). Rule 2: When you use it, replenishing it becomes your top priority. Rule 3: Review it every year — if your fixed expenses went up, the target goes up too. Rule 4: Once you reach the target, that money stays there. Do not touch it for investments or for anything that is not a genuine emergency.

Key takeaways

  • Target: minimum 3 months of fixed expenses. 6 months if you are freelance or have variable income.
  • Automate the transfer on payday — what you do not see, you do not spend.
  • Open a separate account, ideally at a different bank.
  • Keep it safe and liquid: not in stocks or crypto.
  • When you use it in an emergency, replenishing it becomes priority one again.
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