USPS Ground Advantage vs UPS Ground: rates by weight

Why is there no single crossover weight?

Because each carrier prices distance its own way, and the USPS list changes slope at 20 lb. Between 20 and 26 lb the USPS commercial price more than doubles in zones 5 and 8 and rises by about three quarters in zone 2, while UPS Ground climbs far more slowly over the same pounds. That is why every zone settles on UPS at nearly the same weight, within a pound or two of 21 lb on base rates and at 24 or 25 lb with fuel, even though the lighter pounds behave differently from zone to zone.

Checked 2026-11-05: UPS guide, updated September 7, 2026 (pp.89-90); USPS Notice 123, effective October 4, 2026. Before fuel and surcharges.

What happens between 51 and 70 lb?

UPS adds Additional Handling to any package that actually weighs more than 50 lb, and USPS Ground Advantage has no weight fee, so the comparison turns back toward USPS. Before fuel, USPS is lower at every pound from 51 to 70 lb in zones 2, 3 and 4, and at most pounds in zone 5, where the two stay within about a dollar at the top. UPS is lower again from 54 lb in zone 6 and from 52 lb in zone 7, and it stays lower in zone 8.

Fuel settles it. UPS applies its fuel surcharge to the handling fee as well as the rate, and with fuel added USPS is lower at every pound from 51 to 70 lb in every zone from 2 to 8. The fee follows the scale, not the box: a large box that bills over 50 lb by dimensional weight but weighs less does not get the weight fee.

Checked 2026-11-05: UPS guide, updated September 7, 2026 (pp.90 and 179); USPS Notice 123, effective October 4, 2026. Before fuel and other surcharges.

Over 70 lb the comparison ends: USPS does not accept the box, and UPS takes it up to 150 lb. The UPS lines above that, including the Large Package Surcharge, are on what the UPS Large Package Surcharge costs.

How much does the UPS fuel surcharge move the crossing?

It moves every crossing a few pounds heavier and removes the back and forth. With the Domestic Ground surcharge UPS lists from November 2, 2026, UPS stays lower from 25 lb in zones 2, 3 and 4 and from 24 lb in zones 5 to 8, and USPS is lower at every pound below that. Across every weekly rate in UPS's 90-day table, from August 10 to November 2, 2026, the crossing stays between 23 and 25 lb in every zone.

USPS Ground Advantage lists no fuel surcharge in Notice 123 today. Supply Chain Dive reported on October 26, 2026 that USPS will begin a weekly fuel surcharge on package services, including Ground Advantage, in January 2027 (Supply Chain Dive), which would pull these crossings back toward lighter weights.

What assumptions sit behind these numbers?

These numbers rest on list prices, one box priced at its scale weight, and the same zone number at both carriers. Change any of those and a crossing can move, so each assumption and its source is in the table.

How does box size change the answer?

A bulky box can land on the other side of the crossing, because both carriers can bill it above its scale weight. USPS applies dimensional weight only over 1 cubic foot, while UPS applies it to every box on Daily Rates, each dividing length x width x height by 139 after rounding each side up.

Example: a 20 x 14 x 12 in box holding 22 lb, going to zone 5, with UPS fuel added. At 22 lb USPS would be lower, but the box measures 3,360 cubic inches, and 3,360 divided by 139 rounds up to 25 lb at both carriers. At 25 lb UPS is lower, so the bigger box changes the carrier. The box is under 2 cubic feet and under 22 inches long, so it picks up no USPS size fee.

Checked 2026-11-05: UPS guide, updated September 7, 2026 (p.89); USPS Notice 123, effective October 4, 2026; fuel from UPS fuel surcharges.

A smaller box is billed by different rules at each carrier: 12 x 12 x 12 in at 8 lb bills 13 lb at UPS and stays at 8 lb at USPS, because it is not over 1 cubic foot, so measure the box before you compare. How both rules work is in dimensional weight, explained.

What else differs besides the rate?

The limits differ most: USPS Ground Advantage stops at 70 lb and 130 inches, and UPS Ground goes to 150 lb and 165 inches, with UPS adding fuel and residential charges that USPS Ground Advantage does not list.

When will these crossings change?

The next list change comes on December 21, 2026, when UPS Daily Rates for Ground increase (UPS rates page), and the fuel column moves every week before that. USPS's holiday prices end on January 17, 2027, and the USPS fuel surcharge reported for January 2027 would change the comparison too, so re-price your usual parcels in late December and again in late January.

How should a business shipper use the crossing?

Use it to know where to look, then price the packed box, because the delivery address, box size and your own rates each move the answer.

1. Up to about 23 lb, expect USPS Ground Advantage to be lower once UPS fuel is added, even where the base rates are close.
2. From about 25 to 50 lb, expect UPS Ground to be lower to a business address, fuel included.
3. From 51 to 70 lb by actual weight, expect USPS to be lower once UPS fuel and handling are added.
4. Over 70 lb, or past 130 inches, USPS does not take the box, so compare UPS with FedEx instead.
5. To a home, add UPS's residential charge and its fuel before you compare, which keeps USPS lower for longer in near zones.

If you ship enough to hold your own UPS rates, those rates decide it. What UPS publishes for small businesses is on how a small business can get discounted UPS rates, and the wider heavy comparison, with fees by box size, is on UPS vs USPS for heavy packages.