USPS has published its peak-season price increase for the 2026–27 holiday period. The increase runs Oct. 4, 2026, through Jan. 17, 2027, and covers Priority Mail, USPS Ground Advantage, Priority Mail Express, and Parcel Select. Because these are temporary increases to USPS's own published rates, each amount is folded into the rate itself for the season and applies on top of the base commercial pricing you already pay. Nearly every line rises year over year, and the size of the increase varies widely by product, weight, and zone.

The sharpest year-over-year increases hit the lightest packages moving the longest distances. On USPS Ground Advantage, the 0–3 lb. increase in Zones 5–9 rose to $0.55 per package, a 57.1 percent jump over last season. Priority Mail and Priority Mail Express follow the same pattern, with the lightest weights in the distant zones climbing fastest. Across most mid-weight and heavy lines, the increases cluster near 40 percent, so a Zones 5–9 Priority Mail parcel in the 26–70 lb. tier now carries a $9.10 seasonal increase.

Parcel Select moves against that pattern. Its increases are commercial-only and are not divided by zone, and the year-over-year growth is far smaller, ranging from 33.3 percent on the lightest packages down to 4.4 percent in the 26–70 lb. tier. For heavier Parcel Select volume, this season's increase is close to last year's.

One point the announcement does not address: it compares this peak season only to last peak season. Earlier in 2026, USPS also raised rates through its January general rate increase, in the range of 5 to 8 percent, and added a roughly 8 percent increase in late April, described as fuel-related, that remains in effect today. The rate you pay this October compared with last October is therefore higher than the roughly 21 to 57 percent peak-to-peak figures across the main services suggest, because you are now absorbing a third increase across the same period.

Where will you feel this most?

Your exposure comes down to your service mix, your average package weight, and how far your packages travel. Lightweight residential volume moving into distant zones takes the steepest increase, so operations built on small parcels feel this most. Flat Rate products carry their own fixed increases, with the Large Flat Rate Box up $1.75 and all other Flat Rate products up $0.85 regardless of zone. Before October 4, map your holiday volume by product, weight, and zone so you know which parcels cross into the highest-increase lines.

TransImpact built the full 2026–27 USPS peak season price increase reference so you can see every product, weight, and zone with its year-over-year change in one place. Download it here.