Cost-push: when making things gets more expensive

Last step, demand pulled prices up from the buyer's side. Now flip it: prices can also be pushed up from the seller's side.

3 quick questions · about 2 min · no sign-up

Question 1 of 3

A bakery's flour, fuel, and worker wages all jump in price this year. Demand for bread is flat. What happens to the price of bread?

• It rises — the bakery passes higher input costs on to customers
• It stays flat — prices only move when demand moves
• It falls — higher costs force the bakery to sell more cheaply to compete
• I'm not sure

You said: It rises — the bakery passes higher input costs on to customers

Right. When the cost of inputs — wages, energy, raw materials — climbs, it costs more to make each loaf, so producers raise prices to stay viable. That's cost-push: the price level can rise even with demand sitting still.

You said: It stays flat — prices only move when demand moves

You named the demand-pull idea from last step, but that's only half the picture. Prices also rise from the supply side: when inputs like flour, fuel, and wages get more expensive, producers raise prices to cover the cost. That's cost-push.

You said: It falls — higher costs force the bakery to sell more cheaply to compete

It's the opposite. Higher input costs raise what each loaf costs to make, so the bakery raises its price — it can't afford to cut. When costs like wages, fuel, and raw materials climb, producers pass that on. That's cost-push inflation.

You said: I'm not sure

It rises. When a producer's input costs — wages, energy, raw materials — go up, it raises its prices to cover them. So the price level can climb even when demand is flat. That's cost-push inflation.

Another way to see it

Think of it as the floor under the price moving up. The bakery can't sell bread for less than it costs to make. When flour and fuel and wages all rise, that cost floor rises with them — and the shelf price gets pushed up to stay above it, no matter what buyers are doing.

So one input matters more than the rest. Which cost ripples into almost everything?

Question 2 of 3

Economists watch energy prices especially closely as a cost-push driver. Why does a spike in oil tend to push up prices across the whole economy, not just at the gas pump?

• Energy is an input to nearly everything — making and shipping most goods costs more
• Because people drive less, so demand for other goods rises
• Because gas stations are the biggest businesses in the economy
• I'm not sure

You said: Energy is an input to nearly everything — making and shipping most goods costs more

Exactly. Oil and power feed into manufacturing, transport, and farming, so a spike raises costs almost everywhere at once. That's why an energy shock can push the whole price level up — broad cost-push, not one isolated product.

You said: Because people drive less, so demand for other goods rises

That's a demand-side story, but the mechanism here is cost-push. Energy is an input to making and shipping almost everything, so when oil spikes, producers across the economy face higher costs and raise prices broadly.

You said: Because gas stations are the biggest businesses in the economy

It's not about gas stations themselves. Energy is an input to nearly all production and transport, so a spike raises costs across manufacturing, shipping, and farming at once — pushing the broad price level up. That's cost-push.

You said: I'm not sure

Energy is an input to almost everything — making goods, shipping them, growing food. So when oil spikes, costs rise across the whole economy at once, and producers raise prices broadly. That's why energy is a key cost-push driver.

Now put both sides together and tell the two stories apart.

Question 3 of 3

Prices are rising. A shipping crisis has doubled freight costs for importers, while consumer spending is actually a bit weak. Demand-pull or cost-push?

• Cost-push — a supply-side cost (freight) is rising while demand is weak
• Demand-pull — any time prices rise, it's too much money chasing too few goods
• Neither — if demand is weak, prices can't be rising at all
• I'm not sure

You said: Cost-push — a supply-side cost (freight) is rising while demand is weak

Exactly. Demand is soft, so this isn't buyers bidding prices up. Instead a key input cost — shipping — jumped, and producers pass it on. That's cost-push: the price level climbing from the supply side, not the demand side.

You said: Demand-pull — any time prices rise, it's too much money chasing too few goods

That's last step's mechanism, but it doesn't fit: spending is weak, so buyers aren't bidding prices up. Here a cost — freight — doubled and got passed on. Rising input costs with flat or soft demand is the signature of cost-push.

You said: Neither — if demand is weak, prices can't be rising at all

Prices can rise even with weak demand — that's the whole point of this step. When a key input cost like freight jumps, producers raise prices to cover it regardless of demand. That's cost-push inflation.

You said: I'm not sure

It's cost-push. The tell: demand is weak, so buyers aren't bidding prices up. Instead a supply-side cost — freight — jumped and got passed on. Rising input costs driving prices, with flat demand, is cost-push.

The takeaway

Inflation has two engines: demand-pull (buyers bidding prices up) and cost-push (rising input costs — wages, energy, materials — forcing prices up). The tell for cost-push: prices climb even when demand isn't surging.

Next step

Demand-pull and cost-push explain the mechanics of why prices rise. The next card adds the missing ingredient — human expectations — which can turn a one-off jump into a self-sustaining spiral, and shows how it gets stopped.