A fantasy economy works when it is a source of conflict rather than a simulation. Pick the one resource the whole world depends on and cannot easily get, follow the trade routes that move it, and let control of that supply become a weapon as powerful as any army. You are not modelling supply and demand, you are building the pressure that makes characters fight, scheme, starve, and get rich.
This is for the writer who has a map, a magic system, and a couple of kingdoms, and has just realized they have no idea how any of it actually feeds itself. There are no universal rules here, and plenty of beloved fantasy never spells its economy out at all. But a world that only has swords and spells and no sense of who grows the food or who controls the trade tends to feel like a stage set, and the moment you give it an economic spine, the politics get sharper and the stakes get heavier almost for free. My feeling about fantasy economies is that most writers either ignore them entirely or overbuild them into a wiki nobody reads, when the useful version sits in between: enough structure that the world has pressure, not so much that you are running a simulation on the side.
The first thing worth separating out is economy from currency, because they get confused constantly and they are not the same craft problem. Currency is the coins in the purse, the copper-silver-gold question, whether a meal costs three silver or three hundred, and I have written a whole separate piece on how to write money in fantasy that lives entirely at that scene level. Economy is the layer above it: production, scarcity, trade, and the power that comes from controlling any of those. You can build a world with a vivid, load-bearing economy and never once tell the reader the exact price of bread, because the economy is about who has the bread and who wants it, not what it costs.
Start with scarcity, because scarcity is where the conflict lives
The fastest way into a fantasy economy is to pick the single resource the whole world depends on and cannot easily get, and then ask who controls it. Real economies are impossibly complex webs, but fiction does not need the web, it needs the pressure point, and scarcity is the pressure point. Once one thing is both essential and limited, everything interesting follows: someone hoards it, someone is cut off from it, someone builds an empire on the choke point, and someone goes to war to break the monopoly. You do not have to model the rest of the economy in any detail, because the reader will assume the ordinary parts work and pay attention only to the part that is under strain.
Dune is the cleanest example in the genre, and it is worth studying precisely because Frank Herbert built an entire galactic civilization on one scarce substance. The spice melange extends life, enables interstellar navigation, and comes from exactly one planet, which means whoever controls Arrakis controls the empire, and the famous line that the spice must flow is really a statement about supply. Herbert barely bothers with the rest of the economy. He does not tell you the price of a meal on Caladan. He tells you that everything, the politics, the religion, the ecology, the great houses circling each other, hangs off a single resource that cannot be substituted, and that one decision generates more plot than a thousand pages of trade tables ever could.
Follow the trade routes, because that is where the story travels
Once you know what is scarce, the next move is to draw the routes that move it, because trade routes are where a fantasy economy actually becomes visible on the page. A resource sitting in a mine is inert; the moment it has to travel from where it is produced to where it is needed, you get merchants, ports, tariffs, bandits, embargoes, and choke points, and every one of those is a scene waiting to happen. I think trade is underused in fantasy because it sounds dry, but it is the opposite of dry. It is the reason cities exist where they do, the reason wars start over a strait or a mountain pass, and the reason a character can get rich or ruined by a single well-timed shipment.
The web fiction space has one near-perfect model here in Spice and Wolf, Isuna Hasekura's series built almost entirely around a travelling merchant and the medieval trade he lives on, where the tension in a given arc might come from a currency being quietly debased or a market being cornered rather than from a sword fight. On the epic end, George R. R. Martin's A Song of Ice and Fire gives you the Iron Bank of Braavos, an institution that funds crowns and topples them when the debts go unpaid, and the quiet menace of the line that the Iron Bank will have its due does more political work than most armies in the series. Trade and finance are not background flavor in these stories. They are the machinery the plot runs on, and if you are building a world meant to sustain a long serial, the trade routes are some of the most reusable conflict you can lay down early. This is the same instinct behind good kingdom-building in web fiction: a realm is only as stable as the supply lines feeding it.
Treat economic power as a weapon equal to armies
The richest thing you can do with a fantasy economy is let control of it function as raw power, so that a debt or a monopoly or an embargo hits as hard as a siege. Most fantasy defaults to military and magical force as the only real currencies of power, but wealth and supply are just as coercive, and often more interesting because they work slowly and invisibly. An empire that conquers by lending money it knows a kingdom cannot repay, then calling in the debt, is doing something more sinister than an invasion, and it gives you a villain whose weapon is a ledger. My advice, then, is to ask of every major faction not just what army it fields but what it controls economically, because the answer often reshapes who is actually dangerous.
Seth Dickinson's The Traitor Baru Cormorant, from 2015, is the sharpest modern demonstration of this, because its empire conquers with currency, trade, and debt at least as much as with soldiers, and its protagonist is an accountant who learns to wield fiscal policy as a weapon of rebellion. It sounds unpromising on paper and it is gripping in practice, precisely because economic warfare has stakes that armor and spells do not. Even Terry Pratchett, in Making Money from 2007, turned the introduction of paper currency and the confidence that backs a banking institution into a whole comic thriller, which tells you how much narrative pressure sits inside questions of who trusts whose money. When you build economic leverage into your factions on purpose, you get conflict that does not require anyone to draw a weapon, and that variety keeps a long story from becoming a sequence of increasingly loud fights.
Handle the litRPG loot problem before it inflates everything
If your world has a system that rewards adventurers with gold and gear, you have to give that wealth somewhere to drain, or the economy inflates into nonsense within a few arcs. This is the specific failure mode of the LitRPG and progression genres, where every dungeon run pumps more currency and loot into circulation, and unless something pulls it back out, prices spiral and the numbers stop meaning anything. The good news is that online game economies solved this problem a long time ago through what designers call sinks: repair costs, consumables, skill training fees, taxes, guild dues, and high-end purchases that quietly delete money from the world. The player-run economy of a game like EVE Online is studied precisely because it models scarcity, production, and inflation at scale, and the lesson for a writer is that money coming in must be balanced by money going out.
In fiction you do not need to run the math, you need to build the sinks in as story elements so the reader feels the drain. Matt Dinniman's Dungeon Crawler Carl is smart about this, tying loot and the System's store into a structure where wealth constantly gets spent, risked, and lost rather than simply hoarded. My feeling is that the writers who get burned by loot inflation are the ones who treat rewards as pure upside, handing the protagonist a growing pile with no counterweight, so that by book three a bag of gold that used to mean something is trivial. If you decide early what your world's sinks are, whether that is the cost of leveling a skill or a kingdom's tax on adventuring income, you keep every reward meaningful and you turn the economy into a progression lever instead of a bookkeeping headache.
Keep the economy consistent across three hundred chapters
The real test of a web fiction economy is not whether it is clever in chapter three but whether it still holds in chapter three hundred, written live and in order with no chance to quietly retcon. This is the structural reality that separates world-building for a serial from world-building for a standalone novel, and it is the whole reason the worldbuilding for web fiction hub keeps returning to the idea of a living reference. An economy is especially unforgiving here, because scarcity and trade are exactly the kind of facts a reader will remember and catch you contradicting. If a resource was rare and priceless in the early arcs, it cannot become common two hundred chapters later without a reason the reader can point to, or the world stops tracking itself.
This is where I lean on the tools rather than my memory, and it is a genuine reason the platform I run exists in the shape it does. Running a web fiction platform, the continuity failures I see most often are economic and geographic, the trade good that changes hands or the city that moves, and they happen because the author had no single place holding the world's facts. In IlorisNovel's connected wiki you can give each resource, guild, trade route, and economic faction its own entry, @mention them so a chapter stays consistent with what you established, and use the relationship view to see at a glance who controls which supply. The timeline tool is built for exactly the events an economy turns on, a famine, an embargo, a market crash, a war that severs a route, so that when you reach the consequences a hundred chapters later, the cause is still on record. You can build all of that structure without ever slowing the story down, because the reference lives beside the draft rather than inside it. The economy the reader feels stays small and vivid; the economy you track stays complete.
Common questions about fantasy economy world-building
How do you worldbuild a fantasy economy without an economics degree?
You start with scarcity, not equations. Pick one resource the world genuinely depends on and cannot easily replace, decide who controls the supply and who needs it, and the tension writes itself. Real economics is about modelling equilibrium, but fiction only needs the disequilibrium: the shortage, the monopoly, the trade route someone wants to cut. Get the pressure right and you can skip the spreadsheet entirely.
What is the difference between fantasy economy and fantasy currency?
Currency is the coins in a character's purse and what a meal costs; economy is the whole system that decides who has coins and why. Currency is a stakes detail at the scene level, and getting it consistent is its own craft. Economy is a structural layer above that: production, scarcity, trade, and the power that flows from controlling any of them. You can have a rich economy the reader feels without ever naming an exact price.
How much of the economy should I actually put on the page?
Only the parts a character bumps into. Readers do not want a treatise on grain yields, they want to feel that the port city lives and dies by its harbor, or that the war is really a fight over a mine. Build the economic logic so it stays consistent behind the scenes, then reveal it in fragments as the story reaches each piece, the same way you reveal any other part of a world.
How do I stop loot from breaking my litRPG economy?
Give the wealth somewhere to drain. In any world where adventurers pull gold and gear out of dungeons, the money supply balloons unless something pulls it back out, so build in sinks: repair costs, skill training, taxes, consumables, guild fees. Online game economies solved this problem years ago through the same mechanism, and treating it as a design question rather than an afterthought keeps prices meaningful instead of comically inflated.
Can a fantasy economy be the main source of plot?
Absolutely, and some of the sharpest fantasy runs entirely on it. When control of a resource or a debt or a trade monopoly is the thing characters are fighting over, the economy stops being background texture and becomes the engine. A siege is a supply problem, a rebellion is often a tax problem, and an empire that conquers with loans instead of soldiers is doing economics as warfare.
by Jacob Tam · September 1, 2026
I run IlorisNovel, a platform for web fiction writers. If you want to see what building a world with a connected wiki and timeline feels like, you can try the editor and world builder with no account.