Innovation & Wealth › Ancient merchants & trade › Mesopotamian merchants, loans and interest
Code of Hammurabi's rules on loans and trade
c. 1754 BC· Law or policy· Laws, labor & antitrust
Well documentedSolid records, texts or physical evidence.
King Hammurabi of Babylon's collection of about 282 laws, including rules on loans, interest, wages and business agents.
See it on the Innovation & Wealth map →What happened
Carved on a basalt stele over 2 meters tall, the laws capped interest at about 20% on silver and 33% on grain, forgave a year's interest if storms ruined a crop, and required receipts between merchants and their traveling agents. Wages and hire rates for laborers, oxen and boats were fixed. Rules covered tenant farmers, and a builder whose house collapsed and killed the owner could be put to death. It built on older codes, such as Ur-Nammu's.
Impact on society and the economy
It is one of the earliest written attempts to make commerce predictable and protect borrowers, an ancestor of credit, contract and building-code law.
Think of it like
A usury statute, a building code and a standard farm lease, all carved into one stone.
How we know
The main stele, found at Susa in Iran in 1901 and now in the Louvre, plus clay copies made for centuries afterward that fill gaps in the stele's text.
Still debated
Whether judges actually applied it is debated: court records rarely cite it, so many scholars see it as royal showcase or model rulings rather than enforced statute.
Connections (4)
▸Mesopotamian merchants, loans and interest were regulated by Code of Hammurabi's rules on loans and tradeWell documented
The connection
By Hammurabi's time lending was routine and abuses common. His laws capped interest, required contracts and witnesses, forgave interest after crop disasters, and punished lenders who seized a debtor's grain without consent, turning customary lending practice into royal rules.
When and how
Babylon, about 1754 BC, under King Hammurabi, building on earlier rules such as the Laws of Eshnunna.
How we know
The laws themselves name loans, interest rates and merchants, and contracts of the period show the same standard rates in use.
Debates
Whether lenders actually kept to the caps, or courts enforced them, is uncertain; some contracts show higher rates.
▸Code of Hammurabi's rules on loans and trade limited the term of Debt bondage and slavery in ancient economiesWell documented
The connection
Hammurabi's law 117 said a wife, son or daughter handed over for a debt must be freed in the fourth year, after three years of work. It did not abolish debt bondage, but it turned potential lifelong servitude into a fixed term.
When and how
Babylon, about 1754 BC. Hammurabi and other Babylonian kings also issued one-off debt-cancellation edicts.
How we know
The text of law 117 survives on the stele in the Louvre and in clay copies.
Debates
Whether the three-year limit was observed in practice is unknown. A similar fixed term, six years, appears later in biblical law (Exodus 21).
▸Diocletian's Edict on Maximum Prices echoed the fixed wages and fees of Code of Hammurabi's rules on loans and tradeMostly agreed
The connection
About 2,000 years apart, both rulers tried to set economic values by decree: Hammurabi fixed wages and hire fees for laborers, oxen and boats, and Diocletian capped prices and wages across his empire. There was no direct borrowing; it is a recurring idea, not a lineage.
When and how
Babylon, about 1754 BC, and the Roman Empire, AD 301.
How sure are we?
Both texts survive, so the parallel is clear. No evidence suggests Diocletian's officials knew Hammurabi's laws; by then cuneiform was a dead script.
Debates
Whether either set of fixed rates worked as real ceilings or only as reference points is debated.
▸Solon's cancellation of debts in Athens went further than Code of Hammurabi's rules on loans and tradeMostly agreed
The connection
Hammurabi's laws regulated debt bondage, limiting family members' service to three years, but left the system in place. Solon, over 1,100 years later, banned enslavement for debt outright and cancelled existing debts secured on land and persons: a structural reform rather than a cap.
When and how
Babylon, about 1754 BC, compared with Athens, 594 BC.
How sure are we?
Both texts survive at least in part, making the comparison direct; there is no evidence Solon knew Hammurabi's laws.
Debates
Mesopotamian kings also issued sweeping debt cancellations, so whether Solon truly went further depends on weighing his permanent ban against their one-off amnesties.