Twenty percent a year. That was the going rate when a farmer in Bronze Age Mesopotamia needed grain or silver, and the lender was a temple.
Ivan Semyan, an archaeologist and chief researcher at the Laboratory of Experimental Archaeology in Yerevan, tells it as a small aside in a longer talk about how the Bronze Age world was built, and he says himself that it will surprise people. In the cities of Mesopotamia the temple did more than hold ceremonies. It collected the city's resources, stored them and handed them out. Some researchers see in this, from about the middle of the third millennium BCE, the first proto-capitalist elements. The temple also lent.
And we see that this temple acts as a bank too. Besides distributing the city's resources and keeping them, it also gives credit.
И мы видим, что этот храм, он выступает и банком. Потому что, помимо того, что он распределяет городские ресурсы и хранит их, он еще дает кредиты.
— Ivan Semyan, Osnova, 08:11
You took the grain or silver, then paid the interest out of your harvest. Merchants paid out of their takings. The host remarked that this is a steep rate even by a central bank's standards, and Semyan agreed.
The stakes were higher than a bad year. When things went truly wrong, people pledged members of their own family as security. That was debt slavery: a person worked as a slave until someone bought them back.
The rates survive in writing elsewhere. The Code of Hammurabi, from around 1750 BCE, sets 33⅓% for grain and 20% for silver, according to an Olivier Guéant paper on arXiv in 2026. Semyan gives 20% for both, so the figures differ a little depending on who is counting. A study by Gabriella Spada in Zaphon in 2025 describes loans from Sippar in northern Babylonia where one borrower took silver from two deities, Šamaš and Sîn, on the same day. The lenders were gods' houses, and a man could borrow from two at once.
Then comes the twist. A city that lends to its own people is also a city that needs those people to fight. Semyan's point is that debt could hollow out a society. When a war came and the ruler called men up, many of them were bound in debt and had no means to equip themselves. A city could not defend itself with a population in hock.
So the rulers declared amnesties and told people they need not pay. This happened in cycles, forgiveness at intervals, and the reason was military as much as moral.
Behind all of it stood writing. Lending grain, tracking what sat in the storehouse and collecting taxes needed a bureaucracy and a way to keep accounts. That is part of why Mesopotamia produced tens of thousands of cuneiform tablets.
It was also a place where power shifted. The temple's chief priest, the ensi, shared the city with a military leader, the lugal. Time and again, Semyan says, the lugal "devoured" the priest, then immediately corrects himself: figuratively. With an armed force behind him, he took the authority and became sole king of the city.
The American archaeologist Michael Hudson has written about the temple banks in detail, Semyan notes. He also treats them as an early stage, since the later Assyrian merchants in the trading town of Kanesh worked at a larger scale and with more independence.
The first lenders in history were temples, and their worst fear was that their customers would be too poor to fight.
