Types of Inflation: Demand-Pull, Cost-Push, Stagflation & Hyperinflation Explained

1Inflation Classified by Cause

The most common way to classify inflation is by what triggers it. Broadly, prices can be pushed up from the demand side, the supply side, or through a self-feeding wage loop.

a) Demand-Pull Inflation

Occurs when the aggregate demand for goods and services outpaces aggregate supply. It is famously summarised as "too much money chasing too few goods."

Primary triggers:

• Rapid economic growth that boosts consumer confidence and spending
• Increased government spending or central-bank stimulus injecting cheap money into the system
• Sudden surges in export demand from foreign buyers

b) Cost-Push Inflation

Driven by an aggregate decrease in supply, usually caused by rising costs of wages or raw materials. Prices are "pushed" up even when consumer demand is unchanged.

Primary triggers:

• Spikes in global commodity prices such as crude oil, natural gas or industrial metals
• Supply-chain disruptions from geopolitical conflict or natural disasters
• Sudden increases in statutory minimum wages across an industry

c) Built-in Inflation (the Wage–Price Spiral)

The third classic type. Workers demand higher wages to keep up with the rising cost of living; firms raise prices to protect their margins; higher prices then trigger fresh wage demands — and the loop repeats. It is self-perpetuating, which is what makes it hard to break.

2Inflation Classified by Speed

Inflation is also graded by how fast prices climb. The higher up this ladder an economy goes, the more damage it does.

Hyperinflation — the extreme end

An out-of-control cycle where prices skyrocket by more than 50% per month. Money loses its functional value so fast that citizens quickly revert to bartering goods.

Primary triggers: governments printing massive amounts of fiat currency to fund unchecked budget deficits, and a total collapse of public trust in the central bank or legal stability. Historic examples include Weimar Germany and Zimbabwe.

3Special & Related Types

Stagflation

A highly destructive anomaly that combines stagnant growth, high unemployment and high inflation — all at once. It defies the traditional rule that inflation only appears when the economy is booming.

Headline vs Core Inflation

Headline inflation covers the entire basket, including volatile food and fuel. Core inflation strips those two out to reveal the underlying trend. Central banks track both — headline for the real cost of living, core for the persistent pressure. This distinction is central to how the RBI reads price data.

4How Inflation is Measured: CPI vs WPI

Economists track price shifts using price indices. The two most-asked are the Consumer Price Index (CPI) and the Wholesale Price Index (WPI). Which one you use depends on whether you want the impact on the everyday shopper or on the factory floor.

India doesn't have just one CPI

A frequent trap: India publishes several CPIs for different groups.

• CPI-Combined (Rural + Urban): the headline retail number — and the index the RBI's inflation target is anchored to.
• CPI-IW (Industrial Workers), CPI-AL (Agricultural Labourers), CPI-RL (Rural Labourers) — compiled by the Labour Bureau, used for dearness allowance and wage indexation.

There is also a third, broadest gauge — the GDP Deflator — which covers every good and service in the economy rather than a fixed basket. India has additionally discussed moving from the WPI toward a modern Producer Price Index (PPI).

5Who Wins and Who Loses

Inflation quietly redistributes wealth — it doesn't hit everyone equally. This is a favourite exam angle.

Two concepts often tested here: the difference between the nominal and real interest rate (Fisher rule: real rate ≈ nominal rate − inflation), and the small frictions inflation creates — "menu costs" (constantly reprinting prices) and "shoe-leather costs" (extra effort to hold less idle cash).

6How Inflation is Controlled

Controlling inflation is a joint job of the central bank and the government, using three broad levers.

Monetary measures (RBI)

• Raise the repo rate to make borrowing costlier and cool demand
• Increase CRR and SLR to reduce the funds banks can lend
• Conduct Open Market Operations (OMO) — sell securities to mop up excess liquidity

Fiscal measures (Government)

• Cut wasteful public spending and rein in the fiscal deficit
• Adjust taxes to influence how much money circulates

Supply-side & administrative measures

• Release buffer stocks and ease imports / cut duties on scarce goods
• Strengthen the PDS, and use export curbs or MSP management for food prices

7India 2026 Snapshot — Must-Know Facts

• India follows a Flexible Inflation Targeting (FIT) framework, in place since 2016.
• The target is 4% CPI inflation with a ±2% tolerance band (effectively 2%–6%). The government retained this in March 2026 for the next five years — 1 April 2026 to 31 March 2031.
• The rate is set by a six-member Monetary Policy Committee (MPC), with the repo rate as its main tool.
• Retail inflation (new 2024-base CPI) stood at about 2.75% in January 2026 — comfortably inside the band.

8Quick Revision — Test Yourself