Walk into a bank and hand over €1,000. Where does it go?
Most people carry a vault picture: somewhere behind the counter, or behind the app, sits your €1,000, resting quietly in a drawer with your name on it, waiting for you to come back. It is a comforting picture, and it is wrong in almost every detail. Within days, most of your €1,000 has left the building. It is out working: lent to a couple buying a flat across town, to a business bridging its payroll, to another borrower entirely. What stays behind is a number in a database that says the bank owes you €1,000.
None of this is a scandal. It is the actual design, it is centuries old, and it is why banks can pay you interest instead of charging you rent for the drawer. But most people use banks their whole lives without ever being told how the machine works, and people who do not understand a machine tend to either trust it too much or fear it wholesale. This article is the missing manual: what banks do with your money, what protects you, and how to make banks work for you instead of the reverse.
Your money is not in a vault
The design is called fractional-reserve banking, and the name says it all: the bank keeps only a fraction of deposits on hand and lends out the rest.
The bank's business model is the gap between two interest rates. It pays you a little to hold your deposit, it charges borrowers more for loans, and it lives on the difference, which bankers call the spread. Pay depositors 1%, charge mortgage borrowers 4%, and the spread funds the branches, the app, the salaries, and the profit. Your deposit is not a thing the bank stores. It is the raw material the bank works with.
Why does this not collapse the moment three customers want cash on the same morning? Because on a normal day, deposits and withdrawals roughly wash out, so only a small buffer of ready money is ever needed. Central banks set minimum reserve rules, supervisors stress-test the loan books, and the whole apparatus of banking regulation exists precisely because the vault picture is false. The system's known failure mode, everyone demanding their money at once, is the bank run you have seen in old films, and modern deposit protection was invented specifically to defuse it. Which brings us to the part of the manual worth memorizing.
Your deposit is legally a loan to the bank
Here is the sentence that reorganizes everything: when you deposit money, you are lending it to the bank. Legally, the money becomes the bank's, and you become one of its creditors, a person the bank owes. That is not a technicality. It is exactly why deposit protection exists: because lenders can lose money when a borrower fails, and you are a lender now.
A bank is not a vault, it is a borrower. Once you see your deposit as a loan you have made, choosing banks stops being an act of loyalty and becomes an act of lending: check the protection, check the price, and never lend one borrower more than the protected limit.
The protection is real and worth knowing precisely. Every EU country runs a deposit guarantee scheme that covers up to €100,000 per depositor, per bank. If your bank fails, the scheme pays you back up to that limit, typically within days. The UK's FSCS covers £85,000; the US FDIC covers $250,000. These schemes have paid out in real failures. Depositors under the limit were made whole.
The practical consequences fit in three lines:
- Below €100,000 in one bank, your deposit is protected. This is why a bank failure is not something savers under the limit need to lose sleep over.
- Above €100,000 in one bank, the excess is an unprotected loan to a private company. The fix is mechanical, not clever: split the money across banks, because the limit applies per depositor per bank.
- The limit protects deposits, not investments. Stocks and funds held through a bank are a different thing with different rules; they are yours, not loans to the bank, and a later article deals with them.
Old banks, new banks
For most of your life there was one kind of bank: the high-street kind, with branches, queues, and a logo old enough to be on your grandparents' paperwork. The last decade added a second kind, the app-based banks usually called neobanks. The honest comparison has real entries in both columns.
The traditional bank's advantages are breadth and physicality. One roof holds current accounts, mortgages, business banking, and a human you can sit across from when something goes wrong, when you need a document stamped, or when you must deposit actual cash. The costs are equally real: higher fees, poor exchange rates when you spend abroad, apps that feel a decade old, and savings rates that quietly round to zero.
The neobank's advantages are price and software. Low or no maintenance fees, exchange rates near the fair mid-market rate when you travel, an app that shows every transaction instantly and sorts it into categories, and account opening in minutes. The costs: no branches, no cash handling to speak of, customer service through a chat window, and a thinner product range.
There is one difference that matters more than all of those, and it hides in the licensing.
Four accounts, four jobs
Banks sell many products, but for a normal financial life you only need to understand four account types, and the key is that each one is built for a different job. Trouble usually starts when one account is forced to do all four.
| Account | Built for | The trade-off |
|---|---|---|
| Current (checking) | Daily money in and out | Pays little or no interest; convenience is the product |
| Savings | Money parked safely, short term | Earns interest but is deliberately less instant |
| Business | Keeping a company's money separate | Fees are higher; mixing it with personal money is the classic small-business mistake |
| Brokerage (investing) | Buying investments like funds | Not a deposit: values move, and deposit protection does not apply |
The first two you need now. The business account only matters if you invoice anyone, but then it matters enormously. The brokerage account is where this series is eventually heading, and it deserves, and gets, its own articles.
Loyalty is rarely rewarded
Here is the habit the vault picture quietly creates: people pick one bank, usually their parents' bank, and put everything there for forty years. It feels loyal and tidy. It is also, in plain terms, an unpaid subsidy, because banks price for inertia. The best rates go to new customers, and the old back-book earns the rounding error.
Put numbers on it. Say you keep €10,000 of savings at a big bank paying 0.1%, while another regulated, deposit-protected bank pays 2.5%. (Both are illustrative rates for the arithmetic, not quotes.) The first pays you €10 a year. The second pays €250. Left alone for ten years:
Roughly €2,700 of difference, for the one-time effort of opening an account, at the same €100,000 protection. The lesson generalizes beyond savings rates: you do not have to keep everything under one roof, and you almost certainly should not. One bank for everyday spending, because its app and card work best. Another for the savings pot, because it actually pays. A third for the business, a fourth for investing. Each job goes to whoever does that job well. Nobody is being betrayed. You are a lender allocating loans, remember, not a member of a family.
Where the fees hide
Banking fees are engineered to be individually forgettable, and the way to find them is to ask one plain question per fee. Here are the usual suspects:
| Fee | How it hides | The question to ask |
|---|---|---|
| Account maintenance | €3 to €6 a month, "for the account" | What exactly am I getting that a free account lacks? |
| FX markup | 1.5% to 3% buried in the exchange rate abroad | What rate did I actually get versus the rate on Google? |
| ATM fees | €1 to €3 for the "wrong" machine | Which machines are free for my card, and where are they? |
| Overdraft | High interest plus fixed fees for going below 0 | What does one accidental week below zero cost me in euros? |
| Dormancy | Charges on accounts you forgot exist | Which accounts do I still own, and why? |
Small numbers, until you add them up. A €5 monthly maintenance fee is €60 a year. A 2% FX markup on €1,500 of holiday spending is €30. Two €2 ATM withdrawals a month is another €48. That is €138 a year, €1,380 a decade, paid for nothing, by someone who checked the price of every phone they ever bought. The escape is not negotiation, banks rarely haggle with retail customers. The escape is the previous section: move the job to a bank that does not charge for it.
This is how the buckets become physical
If you read the conscious-spending article, you met the bucket system: fixed costs, savings, guilt-free spending, each with its own share of your income. On paper, buckets are a promise to yourself. The way to make the promise self-enforcing is to give each bucket its own account, at whichever bank does that job best.
Salary lands in the current account. On payday, standing orders push the savings share to the high-interest account at bank two, and what remains in the current account is, by construction, spendable without guilt. No spreadsheet, no willpower, no monthly reckoning. The architecture does the discipline. This is the quiet payoff of understanding banks: once you know that accounts are cheap, protection is per bank, and loyalty is unpriced, the multi-account setup stops feeling eccentric and starts looking like what it is, the bucket system made physical.
Do this now
This week, run a fifteen-minute audit of the banks you already use. Three checks. First, protection: for each place your money sits, confirm it is a licensed bank covered by a deposit guarantee scheme, and that no single bank holds more than €100,000 of yours. Second, price: find your last statement and hunt for maintenance fees, then check what rate your savings actually earn, to the decimal. Third, write down the one worst number you find. You do not have to fix it this week. But a fee you have seen, like a debt you have listed, rarely survives long.
Next in the series: The myth of the financial expert, why the people paid to predict markets keep getting them wrong, and what that means for whose advice you take.