When you swipe a credit card for a holiday gift this month, a small piece of new money comes into existence. Nobody prints it. No vault gets emptied. Your bank types a number into the merchant’s side of the ledger and a matching number into your debt. That is how banks create money, and it is almost the opposite of the story most of us learned in school, where your savings sit in a vault until the bank lends them to someone else.
The real version matters for your wallet in a specific way. Your deposit doesn’t fund the next loan. Banks make loans first and go looking for funding afterward, which means your savings account is valuable to your bank mainly as cheap, loyal funding. Once you see that, the 0.38% rate on the average savings account stops looking like a reflection of what your money earns and starts looking like a price the bank sets because it expects you won’t leave.
The textbook money multiplier stopped describing reality in 2020
The classic lesson goes like this. You deposit $1,000. The bank must keep 10% in reserve and lends out $900. That $900 lands in another bank, which keeps $90 and lends $810, and so on until the original deposit has “multiplied” into $10,000 of money across the system. It’s the tidy model of fractional reserve banking, and it still shows up near the top of search results for this topic.
It has one problem. The Federal Reserve cut reserve requirements to zero percent effective March 26, 2020, and they have stayed there. There is no 10% rule anymore. Under the textbook math, a 0% reserve requirement would mean infinite lending, and US banks clearly haven’t done that. So something else must be setting the limit.
The Bank of England said as much years before the Fed made it official. Its 2014 paper “Money creation in the modern economy” states that banks “do not act simply as intermediaries, lending out deposits that savers place with them.” Instead, “whenever a bank makes a loan, it simultaneously creates a matching deposit in the borrower’s bank account.” At the time, bank deposits made up 97% of the money circulating in the UK economy. Coins and notes were a rounding error.
A loan creates a deposit the moment it’s signed
Walk through a car loan. You borrow $30,000. The bank doesn’t pull $30,000 out of anyone’s savings. It records a $30,000 asset (your promise to repay) and a $30,000 liability (a deposit it credits to the dealership). Both sides appear at once. The money supply just grew by $30,000.
Repayment runs the movie backward. Each payment you make shrinks your loan balance and wipes out the same amount of deposits. Pay off the loan entirely and that $30,000 of money is gone, which the Bank of England paper describes as money being destroyed.
You can see the scale of this in the Federal Reserve’s weekly H.8 release. For the week ending October 28, 2026, US commercial banks held $19.8 trillion in deposits and $14.2 trillion in loans and leases, against about $3.1 trillion in cash assets. Most of the money you think of as “in the bank” doesn’t exist as cash anywhere. It’s a ledger entry, and much of it began life as somebody’s loan.
Capital and deposit flight, not reserves, cap how much banks lend
If reserves aren’t the brake, three other things are, and each of them explains something about how your bank treats you.
The first is capital. Regulators require banks to fund a slice of their assets with shareholders’ money, not borrowed money, so that losses hit owners before depositors. Every new loan needs a little more capital behind it. A bank with thin capital has to slow down no matter how many willing borrowers walk in.
The second is profit and risk. A loan only makes sense if the interest it earns covers the cost of funding it plus the expected losses from borrowers who don’t pay. The FDIC’s second quarter 2026 banking profile shows the industry’s net interest margin, the spread between what banks earn on assets and what they pay for funding, at 3.32%. Insured institutions earned $90.1 billion that quarter.
The third brake is the one that involves you directly: deposits leave. When the dealership spends that $30,000, the money often moves to a different bank. The lending bank then has to settle the transfer in central bank reserves, and to keep lending it needs funding that stays put. Deposits that walk out the door are the real danger. Silicon Valley Bank learned this on March 9, 2023, when customers pulled $42 billion, about 20% of its assets, in a single day, according to the Associated Press.
Your $10,000 savings balance saves your bank about $350 a year
Put a number on that third brake and the mechanism lands in your own account. The FDIC publishes a national average rate each month along with a benchmark Treasury yield for comparison. As of October 19, 2026, the national rate on savings accounts was 0.38%. The comparable Treasury yield the FDIC listed for savings was 3.88%.
Say you keep $10,000 in an average savings account. At 0.38%, you earn $38 over a year. If your bank lost your deposit and had to replace that funding at something like the market rate of 3.88%, it would pay $388. The difference, $350 a year, is roughly what your loyalty is worth to the bank in funding cost alone. It doesn’t need your specific dollars to make a loan. It needs you not to leave after the loan is made.
That framing explains a lot of banking behavior that otherwise seems odd. It’s why banks pay sign-up bonuses to bring in new checking customers, why “relationship” rates reward you for keeping several accounts in one place, and why the rate on a savings account you opened years ago quietly drifts lower than the one advertised to newcomers. A depositor who never compares rates is the cheapest funding a bank can get. We’ve written before about why savings rates fall faster than they rise, and this is the engine underneath that pattern.
Once you know how banks create money, a low savings rate looks like a bet against you
None of this makes your money less safe. It does knock out one assumption that keeps a lot of people parked in low-rate accounts: the idea that the rate reflects what your dollars are doing inside the bank.
Your savings aren’t being handed to a borrower down the street, so a low rate isn’t the bank passing along some fixed share of loan income. It’s a decision about how little the bank can pay before you move. That puts the bargaining power on your side of the counter, because the thing the bank is paying for, your staying put, is the one thing you control. When an account pays 0.38% while the Treasury benchmark the FDIC prints next to the national rate sits near 3.9%, the bank is keeping almost the entire spread.
Once you understand how banks create money, the question to ask about your own savings account changes. It’s no longer “what is my money earning the bank?” It’s “how much does my bank think I’m willing to leave on the table?” At 0.38% on $10,000, the answer this year is about $350.
