Estimate annual tribute demands for an Aztec province using historical data from the Codex Mendoza and Matrícula de Tributos.
Select one of the six historically documented provinces drawn from the Codex Mendoza, or choose "Custom Province" to enter your own parameters. Pick how often tribute was collected (the standard Aztec cycle was every 80 days, roughly 4–5 times per year) and set a ruler intensity multiplier. Click Calculate Tribute to see the full breakdown of goods owed to Tenochtitlan.
The Aztec Triple Alliance — Tenochtitlan, Texcoco, and Tlacopan — sustained one of Mesoamerica's largest empires not through a standing garrison economy alone, but through a sophisticated tributary network. At its height around 1500 CE, roughly 400–500 towns across 38 documented provinces paid regular tribute.
Tribute was not just tax — it was the lifeblood of Tenochtitlan's economy, feeding a capital city of perhaps 200,000–300,000 people. The Codex Mendoza records annual deliveries including 7,000+ warrior costumes, tens of thousands of cacao beans, bales of cotton mantles, exotic feathers, amber, gold dust, and even live eagles. A single major province like Tochtepec delivered 1,600 loads of cacao every 80 days — representing enormous agricultural labor.
Historians, students of pre-Columbian Mesoamerica, game designers building historical simulations, and teachers explaining colonial-era economics will all find this tool useful. Understanding tribute scale puts the Spanish conquest's disruption into sharp economic context.
Each province has a base tribute profile sourced from the Codex Mendoza, expressed in standardized "tribute loads" per 80-day period for key goods categories. The formula applied is:
Annual Amount = (Base Loads per Period × Periods per Year) × Demand Intensity Multiplier
The six preset provinces use historically sourced base values. Custom provinces scale goods linearly from a baseline of 4 towns at wealth level 5. All monetary equivalents use a cacao-bean proxy exchange rate common in scholarly literature (~8,000 cacao = 1 cotton mantle = ~1 quachtli).
The Codex Mendoza was an Aztec manuscript compiled around 1541 CE at the request of the first Viceroy of New Spain, Antonio de Mendoza. Its second section is essentially an imperial tribute ledger, listing goods owed by each province to Tenochtitlan. It is one of our most reliable primary sources for Aztec economic history.
No — tribute was highly regionalized. Coastal provinces paid cacao and tropical feathers; highland provinces paid maize, maguey fiber, and warrior costumes; mining regions paid gold dust and copper. The system was pragmatic: provinces paid what they could produce most efficiently.
Each province had appointed tribute collectors called calpixque, who maintained local records and supervised collection. Failure to pay could result in military punishment, enslavement of community members, or punitive increases in the next cycle. The threat alone was usually sufficient in well-integrated provinces.
Absolutely. Many historical strategy games and tabletop RPGs set in Mesoamerica need plausible economic scales for tribute systems. This estimator gives you a defensible baseline rooted in real scholarly data, which you can then adjust with the demand multiplier for dramatic effect.