Katri Pellikka, an expert in the Martha Association's Arki Sujuvaksi ("For a Smoother Everyday Life") initiative, sees in her work what kinds of financial situations most often surprise households.

"It is often not a matter of one large expense item, but rather that several expenses and a decrease in income accumulate over the same period," Pellikka says.

We listed the most typical unexpected expenses.

1. Breakdown of household appliances

  • Surprises often arise when an appliance breaks down clearly ahead of schedule – for example, at 5 years, even though the expected lifespan is 10 years.
  • Usually the price is at least a few hundred euros, and a new appliance with installation can cost even more.

2. Car repair costs

  • A car often breaks down when you least expect it.
  • Small defects can cost around a hundred euros, but larger repairs can easily cost several hundred or thousands of euros, depending on the spare parts and labour.

3. A pet suddenly falls ill

  • An additional challenge is that the final price is not always visible in advance.
  • Examinations and procedures can cost several hundred euros – in cases requiring multiple visits, the bill can easily reach thousands of euros.

4. Sudden increase in electricity bills

  • In recent years, users of spot-priced electricity in particular have seen how individual days can significantly increase their electricity bill.
  • The most expensive days of winter can cost many times more compared to summer, and a single month's electricity bill can jump by hundreds of euros.

A series of coincidences

A single expense won't break your finances, but three in a row can. Often, finances are destabilised by the occurrence of several small or medium-sized expenses in the same period of time – for example, a broken boiler, illness, and an increase in basic everyday costs.

Prepare for a sudden drop in income and increasing overall expenses

A surprising expense can also be a drop in income: unemployment, reduced hours, or long-term illness. If income decreases at the same time as a large bill arrives, everyday expenses can become overwhelming.

In recent years, many people's finances have slowly tightened, as housing costs, food, fuel, and hobbies have become more expensive at the same time.

This increases the monthly budget steadily, and without adjusting regular expenses, the change can be as burdensome as one big surprise expense.

Build a buffer for unexpected expenses

According to Katri Pellikka, the best way to prepare for unexpected expenses is to have a separate buffer fund.

It is a good idea to keep the buffer in a separate, interest-bearing account‍ without a payment card to prevent the money from being spent accidentally. The main thing is that the funds can be easily withdrawn when you really need them.

Pellikka recommends making a simple inventory: housing expenses, food, medications, phone and internet, commuting, and loan interest and repayments. These constitute the minimum amount required for the buffer.

Often the recommendation is about 2–3 months of essential expenses, but even a smaller buffer is useful.

Pellikka recommends automating your savings. When the transfer to the buffer account happens automatically on payday, the decision does not have to be made again every month.