“So, before investing, do I need to have money that I don’t invest?”

Exactly. And no, it is not a paradox.

Whenever I talk about financial planning, investments and long-term goals, there is one step that people tend to skip or underestimate with remarkable regularity: the emergency fund.

I know—it is not sexy. It is not the latest thematic ETF focused on artificial intelligence. It is not the BTP Italia bond with a coupon that “at least earns something.” It will not grow your wealth over the long term. But it is, without question, the first building block of any serious financial plan.

Without an adequate emergency fund, everything else—asset allocation, diversification and long-term strategy—rests on fragile foundations. And fragile foundations eventually collapse. Usually at the worst possible moment, because emergencies have the charming habit of appearing when you least expect them.

Too much, too little, or in the wrong place

In our experience with hundreds of families and professionals, the emergency fund is routinely mishandled in three ways.

First: it does not exist. The classic case. Everything is invested, with zero cash reserves. It works perfectly until the boiler breaks, an unexpected medical expense arrives or someone loses their job. At that point, there are two options: go into debt or sell investments. And selling investments in a moment of urgent need almost always means selling at the wrong time, at the wrong price, with panic acting as your financial adviser.

Second: there is too much of it. The opposite extreme. People with €80,000, €100,000 or even €150,000 sitting in a current account or savings account “because you never know.” Prudence is a virtue. Excessive prudence is a cost—and not a small one. Something very specific is happening to that money: it is losing value. Inflation erodes it every year, silently but relentlessly. Keeping €100,000 idle with average inflation of 2.5% means losing approximately €2,500 in purchasing power each year. In ten years, that money will be worth around €78,000 in real terms. No one tells you this because the number on the account does not change. But what you can buy with that number does.

Third: it is in the wrong place. “Emergency” money invested in balanced mutual funds, shares or instruments that can lose 15–20% precisely when you need them. Or, at the other extreme, under the mattress—figuratively or literally—with zero return and without even the protection of the Interbank Deposit Protection Fund.

Each of these mistakes has a cost. Sometimes in euros, sometimes in anxiety, and sometimes in both.

How much you need, who needs it and where to keep it

The basic rule: 3–6 months of essential expenses

Pay attention: months of expenses, not months of income. The difference is not a minor detail. If you earn €3,500 a month but your essential expenses—rent or mortgage, utilities, groceries, transport and insurance—amount to €2,200, the emergency fund should be calculated based on €2,200, not €3,500.

Whether the margin should be 3 or 6 months depends on the stability of your income and your overall situation. Let us look at the different cases.

How much to set aside: the table by situation

Situation	Essential monthly expenses	Recommended months	Target emergency fund
Single person, stable employed job	€1,500	3 months	€4,500
Couple, two employed incomes	€2,500	3 months	€7,500
Couple with children, one income	€2,800	6 months	€16,800
Single-income family, mortgage	€3,200	6 months	€19,200
Self-employed professional / VAT number	€2,500	9 months	€22,500
Business owner	€3,000	9–12 months	€27,000–€36,000

The expenses shown are indicative; yours will be different. The principle is not: the more variable or uncertain your income, the more months you need to cover.

A public-sector employee with a permanent contract and no mortgage needs less in reserve than a freelance consultant with a VAT number whose revenue fluctuates by 30% from one quarter to the next. This is not pessimism. It is arithmetic.

For business owners and self-employed professionals, the issue is even more serious. Income is not guaranteed, fixed expenses remain, and recovery takes longer if the business enters a crisis. Nine to twelve months of essential expenses are not paranoia; they are common sense.

Where to keep it: the right instruments—and the wrong ones

The emergency fund has one non-negotiable technical requirement: it must be available immediately, without significant penalties and without the risk of losing principal.

Instrument	Suitable?	Indicative return	Why
Withdrawable savings account (e.g. BBVA, Illimity)	Yes	2–3% gross	Immediate liquidity, principal guaranteed up to €100K (FITD)
3–6-month BOTs	Yes	2.5–3%	Short maturity, preferential 12.5% tax treatment
Short-maturity BTPs (< 12 months)	Yes	2.5–3.5%	12.5% taxation, can be sold on the market
Current account (minimum portion)	Yes, in part	~0%	For immediate expenses, but not the entire fund
Bond mutual fund	No	Variable	Price fluctuations, redemption times of 3–5 days
Equity ETF	No	Variable	It may lose 20–30% precisely when you need it
Individual shares	No	Variable	Extreme volatility—the opposite of a reserve
Cash at home	No	0%	No protection, no return, risk of theft
Crypto	No	Variable	Extreme volatility, no guarantees

For most situations, the optimal combination consists of a portion in a withdrawable savings account—the immediately accessible part—and a portion in short-maturity BOTs or BTPs, to obtain a minimal return with preferential 12.5% taxation. You will not become rich with an emergency fund. That is not its job.

For more information on BTPs and savings accounts, see the dedicated article: BTPs, savings accounts and “safe” returns: when are they really worthwhile?.

What it is really for: the psychological function

Here is the point that almost no one fully understands, and that changes everything.

The emergency fund is not only there to pay for a broken boiler or the dentist. It exists to allow you to invest the rest with peace of mind.

In the bucket strategy, the three-bucket strategy, which is at the heart of goal-based financial planning, the emergency fund is Bucket 1. It is the foundation. It is security. It is what allows you to look at a 30% market decline in Bucket 3 and say: “That is fine; I will need that money in 20 years. I have time.”

Without Bucket 1, a 30% decline is not a statistical figure. It is terror. It is “I have to sell everything before it is too late.” It is panic selling, the single most costly mistake an investor can make.

The mechanism is simple and powerful: knowing that you have six months of expenses covered, whatever happens, frees your mind to make rational decisions about the rest of your wealth. It is the emotional dam that prevents short-term anxiety from destroying your long-term strategy.

At Plannix, we see this effect every day. Clients who built their emergency fund before starting to invest sleep better, sell less in a panic and follow their plan with much greater discipline. Not because they are smarter, but because they are more at ease. And peace of mind, when it comes to your own money, is worth more than any percentage point of return.

Practical application: build your emergency fund in 4 steps

Step 1 — Calculate your essential monthly expenses. Not your income, and not your ideal lifestyle. These are the expenses you must cover regardless: rent or mortgage, utilities, groceries, transport, insurance and your children’s school expenses. Exclude all non-essential spending from the calculation.

Step 2 — Multiply by the number of months. Stable employee without a mortgage: 3 months. Single-income family with a mortgage: 6 months. Self-employed professional or business owner: 9–12 months. There is no universal answer, but the table above is a good starting point.

Step 3 — Choose where to keep it. Use a withdrawable savings account for the immediately accessible portion—at least 50%. Use short-maturity BOTs or BTPs for the rest, so that inflation does not erode its entire value. Zero shares, zero funds and zero instruments that can fall in price.

Step 4 — Build it before investing the rest. This is the step that requires discipline. If you do not yet have an adequate emergency fund, your absolute priority is to build it, even if that means postponing the start of your investments by a few months. It may seem counterintuitive, but an investment plan without a safety net is a plan that risks falling apart at the first unexpected event.

The emergency fund is boring. And that is exactly the point

Personal finance is not aerospace engineering. The things that work are almost always simple, unspectacular and a little boring. The emergency fund is the perfect example: it does not generate wealth, it does not fuel dreams and it is not a topic for a drinks-party conversation.

But it is the foundation on which everything else rests. It is why you can invest Bucket 3 in global equities with a 20-year horizon without waking up in a cold sweat every time the market falls by 5%. It is why an unexpected event remains an unexpected event instead of becoming a financial catastrophe.

Build the foundation. Then build everything else on top of it.

It is less fascinating than “I found the stock that will rise 300%.” But ten years from now, anyone with a solid plan built on solid foundations will be in a very different position from someone who chased returns without a safety net.

To learn the basics of personal finance and investing, access our free course.

FAQ

I already have investments but no emergency fund. Should I sell them to create one?

It depends on the situation, but generally speaking: if you have no cash reserve and your investments are your only resource, seriously consider liquidating part of them to build an emergency fund. It is better to have a slightly smaller portfolio with a safety net than a larger portfolio exposed to the risk of having to sell everything at the worst possible time. If your income allows you to set money aside, you can also build it gradually with monthly savings—but set yourself a specific deadline.

Does the emergency fund need to be updated over time?

Yes. Essential expenses change: another child, a new mortgage or a move. Review the calculation at least once a year, together with your overall financial plan. If expenses increase, the fund should increase. If they fall—children leaving home or the mortgage being paid off—you can free up part of the cash to invest, but only after verifying that the new level is adequate.

Can I use a line of credit—a bank overdraft or credit card—as an emergency fund?

No. A line of credit is not an emergency fund—it is potential debt. A bank overdraft can be revoked, and it is often revoked precisely during times of crisis. Credit cards carry interest rates that can exceed 15% per year. An emergency fund must be your own money: liquid, available without asking anyone’s permission and without paying interest.

Are €100,000 in a current account an adequate emergency fund?

Almost certainly not—in the sense that it is too much. If your essential expenses are €3,000 per month and you are an employee, you need €9,000–€18,000 in an emergency fund. The remaining €80,000–€90,000 is losing purchasing power every day. That is not prudence; it is a huge opportunity cost. That money should be invested according to your goals and time horizon, as part of proper financial planning (A1). The emergency fund should be adequate, not unlimited.