By Alicia Wallace, CNN
(CNN) — The national average price for a gallon of regular unleaded gasoline is on the verge of hitting $4 for the first time since 2022.
That price level is relative: A $4 gallon of gas would be welcome in California, Washington state or Hawaii, where the state averages run north of $5 per gallon; while residents of others states where the cost of living is lower are paying under $3.50 a gallon at the pump.
Regardless of the locale, no one’s really a fan of sharply rising gas prices.
Still, the $4 national average serves as a notable threshold – one that carries psychological, mathematical and mechanical implications for the US economy.
“This is worrisome, especially for those who have the least ability to weather the storm,” said Diane Swonk, chief economist at KPMG.
The math behind the estimates
Before diving in to the economic effects of $4-per-gallon gas, it’s important to show one’s work.
Joe Brusuelas, chief economist at RSM US, laid out some of the building blocks of the gas price quantification:
Every $10 increase in the barrel of oil…
- Creates a 0.1 percentage point drag on real GDP growth (the broadest measure of economic activity)
- Increases inflation by 0.2 percentage points
- Raises prices at the pump by 24 cents
- Causes a $450 annual hit to household income
Oil prices have risen by more than $30 a barrel since the war.
A gallon of regular unleaded gasoline averaged $2.98 before the war started.
Economic activity
A $30 increase in oil prices equates to about a 0.3 percentage point knock on real GDP growth (which was 0.7% at the end of last year). While that’s not very big, it tends to add up over time, Brusuelas said.
It’s not easy to topple a $30 trillion economy – a “dynamic and resilient beast,” Brusuelas said.
“However, even a $30 trillion beast has its pain points,” he added.
And the point where things could start getting dodgy isn’t too far away.
When oil prices go above $125 (and gas prices top $4.25 per gallon, and inflation goes above 4%), that’s when conversations grow louder about “demand destruction,” Brusuelas said. In other words, prices get so high that people change behaviors and don’t buy as much.
And some consumers already are changing their behaviors, taking fewer trips if they can and shifting or cutting out spending, said Swonk.
A drop-off in demand can lead to falling prices; however, the supply of oil has been constrained by disruption and destruction, he said.
Inflation
Late last week, oil prices were up $30 from their pre-war levels, which should roughly equate to a 75-cent gas price hike; however, average prices at the pump were up 93 cents, Brusuelas said.
“So, what that tells us, is the risks on inflation are a little bit higher,” he said.
US prices were increasing at an annual rate of 2.4% in February, before the war started, according to the latest Consumer Price Index data.
That could easily jump to 3.5% when the March data is released in a couple of weeks, and the April rate could top 4%, Brusuelas said.
That 1.1 percentage point estimated jump from February seems to blow past the $10 increase = 0.2 percentage point rise; however, it’s also reflective of the sweeping energy-related price increases (such as in diesel and jet fuel) as well as other war-impacted inputs, such as fertiliz