What it means
The distinction that trips people up is between the level of prices and the rate of change. During disinflation the price level keeps climbing, so the weekly shop still costs more than last year, but the increase is smaller than the year before.
Central banks aim for disinflation whenever inflation runs above target. Raising interest rates makes borrowing dearer, cools spending and investment, and gradually takes the heat out of price rises without the economic damage that outright falling prices would cause.
Disinflation is generally welcomed but it is uncomfortable for particular businesses. Companies that pushed through large price rises during the inflationary spike find that customers resist further increases, so revenue growth slows while wage costs, which adjust more slowly, are still catching up.
For planning purposes the practical effect is on assumptions. A budget built on 6% annual price increases will overstate revenue if actual inflation drops to 2.5%, and long-term contracts with escalation clauses tied to a price index will deliver smaller uplifts than modelled.
There is also a psychological trap. Customers and employees often judge inflation by the total price rise they have absorbed over several years, so a business that announces relief because inflation has halved can still meet real resistance on price.
In practice
Real-world examples.
Example
A furniture retailer that raised list prices 9% in one year finds it can only pass on 3% the next as input costs settle. Gross margin holds up because timber and freight costs are rising more slowly too.
Example
A commercial landlord with leases indexed to a consumer price measure sees annual uplifts fall from 7% to 2.8%. The rent still increases, but the revenue forecast in the investment model needs rebuilding.
Example
A manufacturer negotiating a three-year pay deal offers 3% a year rather than the 7% granted during the price spike. Staff push back because their cumulative cost of living is still higher, even though the current rate has fallen sharply.
Think of it
“Disinflation is inflation slowing down-prices still rising but less fast.
Formula
Calculation
Inflation rate = (Price index this year - Price index last year) / Price index last year x 100
Disinflation occurs when this year's inflation rate is positive but lower than last year's.
Take a representative basket of goods costing $200.00 at the start of year one.
Year one inflation is 6%, so the basket costs $200.00 x 1.06 = $212.00.
Year two inflation is 4%, so the basket costs $212.00 x 1.04 = $220.48.
Year three inflation is 2.5%, so the basket costs $220.48 x 1.025 = $225.99.
The inflation rate fell from 6% to 4% to 2.5%, which is disinflation, yet the basket still costs more every single year. Over the three years the total rise is ($225.99 - $200.00) / $200.00 = 13.0%.
If prices had instead fallen from $220.48 to $215.00 in year three, that would be deflation, a different and generally more worrying condition.Case study
Seen in the real world.
Perrivale Coffee Roasters is an invented company used for illustrative purposes to show how disinflation reshapes a plan. During a period of rapid price increases it lifted wholesale prices twice in a year and still grew volumes, because cafes expected everyone's prices to rise.
Its next budget assumed another 7% price rise and 4% volume growth. Inflation then slowed to 2.5%, competitors held their prices, and Perrivale managed only a 2% increase before losing two accounts, so revenue landed 5% below plan even though volumes were fine.
The finance team rebuilt the model with separate price and volume assumptions, tied the price line to a published inflation forecast rather than last year's experience, and added a scenario at 1% price growth. This fictional example shows that falling inflation is good news for customers and a genuine planning risk for sellers.
Watch out
Common mistakes.
- Confusing disinflation with deflation. Disinflation means prices rise more slowly, while deflation means the price level actually falls, and the two call for opposite responses.
- Assuming falling inflation means costs are coming down. Costs are still rising, just at a gentler pace, so a budget cannot simply be frozen at last year's level.
- Leaving pricing on autopilot. Businesses that keep pushing large increases into a disinflationary market usually lose volume before they notice the change.
Questions
People also ask.
Does disinflation mean interest rates will fall?
Not immediately; central banks usually wait for the slowdown to look durable before cutting, so there is often a lag of several quarters.
Is disinflation bad for wages?
Real wages can improve if pay settlements lag the fall in inflation, though employees frequently feel worse off because they compare against several years of accumulated price rises.
How is it measured?
By comparing successive inflation readings from a price index such as a consumer price index, checking that the rate is falling while remaining above zero.
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