South Carolina motorists are feeling the pinch at the pump as the state's average price for regular gasoline surged to $3.9243 per gallon on Sunday, September 13, according to AAA's daily survey. This marks a weekly increase of 16.85 cents and a staggering $1.0947 jump compared to the same date last year. For a typical 15-gallon fill-up, that translates to an additional $2.53 over the past week and a hefty $16.42 more than a year ago—bringing the total cost to $58.86 versus $42.44 in 2025.
The year-over-year comparison is particularly stark: regular gasoline in South Carolina is now 38.7% more expensive than it was a year ago. Even the one-month increase is notable, with prices climbing 27 cents, or 7.4%, since mid-August. This persistent upward pressure on fuel costs is forcing households to allocate more of their discretionary income to essential transportation, leaving less room for spending on restaurants, retail, and other non-essential goods.
Wholesale Signals Offer Mixed Outlook
While retail prices have been climbing, the wholesale market is showing signs of a potential slowdown. October RBOB gasoline futures, the primary U.S. wholesale gasoline benchmark, settled at $3.1593 per gallon on Friday, down 1.47% for the day. However, that settlement is still 14.58 cents above the September 4 close, indicating that wholesale prices remain elevated despite the recent pullback.
The relationship between wholesale and retail prices is critical. Retail prices include distribution costs, taxes, and station margins, so changes at the wholesale level typically take time to reach consumers. This lag creates a key near-term test: if RBOB futures hold Friday's decline, South Carolina's daily average could stabilize, even as the year-over-year burden remains substantial. Conversely, if wholesale gasoline resumes its upward trajectory, the current $2.53 per fill-up increase could understate the pressure still moving through the retail system.
National Context and Regional Advantage
Despite the sharp increases, South Carolina still maintains a significant price advantage over the national average. AAA reported the national average at $4.3130 on September 13, making South Carolina's price 38.87 cents, or 9.0%, lower. The state's price also eased 0.8 cent from Saturday, an early indication that the latest jump may not be accelerating on a daily basis.
National data points in the same direction. The U.S. Energy Information Administration (EIA) placed the national average for regular gasoline at $4.157 per gallon for the week of September 7, up from $4.071 on August 31. Meanwhile, AAA noted on September 10 that the national average had risen 13 cents in a week, driven by crude oil price volatility linked to Strait of Hormuz tensions.
Impact on Consumer Spending
The sustained rise in fuel prices is becoming a recurring claim on household cash that cannot be easily deferred. For many families, fuel is a non-negotiable expense, and higher prices mean less disposable income for other purchases. This could have broader implications for the economy, as consumer spending is a major driver of growth. Retailers, restaurants, and service providers may feel the ripple effects as consumers tighten their belts.
Investor Takeaway
For investors, the key takeaway is to separate the level of prices from the direction. At $3.9243 per gallon, gasoline is already costly for South Carolina households, but the next moves in RBOB futures and several days of AAA readings will determine whether this becomes a fresh drag on September spending or a short-lived spike. The wholesale market's recent pullback offers some hope, but the situation remains fluid.
As the market watches these developments, the energy sector and consumer discretionary stocks could see volatility. The broader economic picture will depend on whether fuel prices stabilize or continue their upward march, with implications for inflation and consumer confidence.
