A household that spends $200 a week on groceries is looking at $10,400 a year, and the question for 2027 is how much more or less that figure will be. USDA’s Economic Research Service has an answer with a catch. Its 2027 forecast for food at home is a rise of 1.8 percent, inside a prediction interval that runs from a 5.0 percent fall to a 9.2 percent rise.
Fourteen points of room around a 1.8 percent guess
The forecast comes from the Economic Research Service’s September 25, 2026 Food Price Outlook. For 2027, the agency forecasts food-at-home prices, the grocery-store side of the food bill, to rise 1.8 percent on average. The same line carries a prediction interval of minus 5.0 to plus 9.2 percent. Subtracting the low end from the high end, 9.2 minus negative 5.0, gives a band 14.2 percentage points wide.
Rounded to whole numbers, the range reads as a 5 percent fall at one end and a 9 percent rise at the other, with a rise of about 2 percent in the middle. Prices falling across a whole year of grocery aisles would be unusual, yet the models count it as one of the plausible outcomes, and it is part of why the band is so wide. Likewise, a 9 percent rise would be a hard year for any family on a fixed income.
Nothing in that band is a measured price. It is a forecast of a 2027 annual average, produced in September 2026, and the agency prints the range on purpose so that nobody mistakes the 1.8 percent for a promise. A grocery number quoted with more confidence than the range allows is reading past what the forecasters themselves say they know.
What the agency means by a 95 percent interval
The agency’s forecast documentation says the Food Price Outlook generates “95 percent forecast intervals (i.e., confidence intervals) using time-series forecasting models selected based on how well the models suit each food price category.” In plain terms, the models are built so that the actual annual figure would land inside the printed range 95 times out of 100, and outside it the other five.
A point estimate such as 1.8 percent is the middle of the model’s expectations, and no more likely than any neighboring value to be the final result. The same documentation notes that “as more data become available, the forecasts become more accurate and the span of the forecast intervals shrinks.” Width, then, is a measure of distance from the data. Twelve to eighteen months out, the models have little to go on.
Why 2026 is tight and 2027 is wide
The contrast inside the same release makes the point. For 2026, with most of the year already measured, the food-at-home forecast is 2.4 percent with an interval of 1.8 to 3.0 percent, a span of 1.2 points. For 2027, the span is 14.2 points, nearly twelve times as wide. The figure most often repeated as “next year’s grocery inflation” is therefore the least settled number on the page.
The wider categories behave the same way. All food in 2027 is forecast at 2.0 percent, with an interval of minus 2.7 to plus 7.0 percent, a 9.7-point span. Food away from home, the restaurant and takeout side, is forecast at 2.6 percent, with an interval of 0.2 to 5.1 percent, a 4.9-point span. Restaurant prices are the narrowest of the three, and grocery prices are the widest.
A weekly budget laid against the range
Illustrative arithmetic shows what the band could mean for a household. These figures are the writer’s own application of the forecast to a hypothetical $200 weekly grocery bill, not a USDA estimate, and they treat the household’s prices as moving exactly with the national average, which no household’s do.
- At the 1.8 percent point estimate, $10,400 becomes about $10,587, an increase of roughly $187 over the year.
- At the low end, a 5.0 percent fall, the bill would be about $9,880, which is $520 less.
- At the high end, a 9.2 percent rise, the bill would be about $11,357, which is $957 more.
The spread between the two ends is about $1,477 a year on a bill that size. A household that planned around the middle would be off by that much at either extreme, and the forecast offers no way to say which direction is likelier than the other.
Planning with a range instead of a point
For a family budget, the practical reading is to hold the 2027 grocery line loosely and to revisit it as the figures firm up. The agency says it updates the outlook monthly and projects food prices up to 18 months ahead, and its Food Price Outlook page lists the next release as October 23, 2026. Each release feeds in the most recent Consumer Price Index data from the Bureau of Labor Statistics, and the 2027 interval is expected to narrow as that data accumulates.
Anyone reading a headline that gives a single 2027 grocery figure can check it against the range the agency itself prints. A story that reports 1.8 percent without the minus 5.0 to plus 9.2 percent interval has dropped the part of the forecast that carries the most information.
The September 25 summary lists Hayden Stewart, Diansheng Dong and Wilson Sinclair as the Economic Research Service contacts for the outlook, and every number above comes from that page and the agency’s documentation.
A kit for logging the housing costs that sit beside the grocery line
Food is one line in a larger household budget, and older homeowners and renters often face housing costs that are just as hard to forecast. The kit below is written for them.
The Senior Property Tax & Home-Cost Relief Kit is an 11-page kit that sets out the 5 kinds of property-tax relief and includes an application log and renewal calendar for tracking each one.
Sort a household’s housing-cost relief options into one application log →
This article was drafted with AI assistance and checked against the USDA Economic Research Service pages linked above.
