Buffer first, market second: how to build an emergency fund

The washing machine dies, the car needs a garage, a big bill arrives from the dentist. These things never pick a good moment. If you have no money set aside, you reach for your investments or for debt.

That is why a buffer comes before investing. Investing comes with price swings. If you need cash at the wrong moment, you sell at a loss. A buffer takes that pressure away.

What a buffer is, and what it is not

A buffer is money for unexpected, necessary expenses. It is not for a holiday, not for a new phone and not for money you might want to invest.

According to the Rabobank page, which cites the Nibud, a buffer is also not meant for a drop in income, for example as a freelancer, in unemployment or in disability. That needs a separate pot.

How much is enough?

There is no fixed number that fits everyone. There are guidelines.

Financer cites the Nibud with a norm of at least three months of fixed costs. Financer itself recommends a wider range: singles 2 to 3 months, couples 3 to 4 and families with children 4 to 6 months. That last range is Financer's opinion and not a Nibud norm.

For amounts, Financer, citing the Nibud, gives €6,400 for a single person. For families the sources differ. Rabobank gives about €10,000 as a minimum for a family with two children according to the Nibud, while Financer gives €12,400 for a couple with two children. The Nibud has its own buffer calculator. I could not reach the Nibud site itself, so use that calculator for your own situation. If you own a home or a car, the amount is higher.

For building it up, the Nibud, via Rabobank, mentions a savings norm: at least 10 percent of your net monthly income.

Where do you keep it?

In a separate savings account, apart from your current account, so you do not spend it by accident. Choose an account you can access at any moment, with no fixed term. Financer advises against investing the buffer or putting it in crypto. That fits why you have it: the money must be there when you need it, even right after the market has dropped.

The deposit guarantee scheme

If your bank fails, your savings in the Netherlands are protected by the deposit guarantee scheme of De Nederlandsche Bank (DNB). What you should know, according to the ASN Bank information sheet:

• Covered up to €100,000 per account holder per bank. All balances at the same bank count together, also under different brand names. ASN names ASN Bank, BLG Wonen, RegioBank and SNS as an example.
• For a joint account, the limit applies to each account holder separately.
• Payout follows within 7 working days.
• In certain situations, such as a home sale, a higher protection of up to €500,000 per person applies for six months.

If you save more than €100,000, you spread it over several banks. For a normal buffer that rarely comes up.

Step plan

1. Work out your fixed costs. Rent or mortgage, energy, insurance, groceries, subscriptions, transport. Add it up per month. Use last year of your bank statements, not your gut feeling.

2. Set your goal in months. Start with the guideline of three months of fixed costs. Adjust if your income is uncertain.

3. Open a separate account. Give it a name like "Buffer". Do not attach a debit card.

4. Set up an automatic transfer. Right after your salary, not at the end of the month. The Nibud mentions 10 percent of net income as a savings norm. If that is not possible, start with what is and raise it later.

5. Work out how long it takes. An example with invented numbers: your fixed costs are €1,900 a month, so three months is €5,700. Save €250 a month and you get there in 23 months. Save €400 and it takes 15 months. That is arithmetic, not a promise about what you can save.

6. Use it only for emergencies. If you dip into it, refill it first.

7. Only then start investing. Or at least alongside building it, with an amount you can miss. The order is a choice that belongs to your situation. BitFox only explains here why most guidelines put the buffer first.

What I think of it

I see three months as a reasonable starting point and nothing more. The sources already differ on amounts, and your life is not an average. An entrepreneur with irregular income sits differently from someone with a steady job and low fixed costs. It comes down to calm: can you absorb a setback without selling your investments in a panic?

This is an explanation. It is not personal advice on how much to save or what to do with your money.

Sources

• Financer, How much savings should you have in 2026, accessed 10 October 2026
• Rabobank, Financial buffer: what it is and how much you need, accessed 10 October 2026
• ASN Bank, Deposit guarantee scheme information sheet, accessed 10 October 2026
• Banken.nl, Deposit guarantee scheme, accessed 10 October 2026