The headline: rate-shopping isn't optional
Conventional advice says “USPS is cheapest for small packages, UPS/FedEx for big ones.” That is directionally true but dangerously incomplete. When we priced an identical basket of boxes across USPS, UPS, and FedEx on June 22, 2026, the cheapest carrier changed cell by cell — and choosing the wrong one routinely cost more than double.
- Light (1–2 lb): UPS Ground Saver was usually cheapest, often undercutting USPS Ground Advantage by a dollar or more per label.
- Mid-weight (~5 lb): USPS Ground Advantage flipped to cheapest in every lane we tested — frequently by a wide margin.
- Heavy (20–50 lb): FedEx Ground won almost every cell, while USPS Ground Advantage became the most expensive option — pricing a 50 lb box as high as $182.75 versus FedEx's $19.01.
In other words: a seller who defaults to one carrier is overpaying on most of their orders. That is the entire case for multi-carrier rate-shopping — and the reason this index exists.
Cheapest carrier by weight × zone
Each cell shows the cheapest economy-ground carrier and its quoted rate for that weight and destination zone, shipping from New York, NY. Pulled June 22, 2026.
| Weight | Zone 2 Philadelphia, PA | Zone 3 Pittsburgh, PA | Zone 4 Chicago, IL | Zone 5 Dallas, TX | Zone 6 Denver, CO | Zone 7 Phoenix, AZ | Zone 8 Los Angeles, CA |
|---|---|---|---|---|---|---|---|
| 1 lb | UPS $6.19 | UPS $6.66 | UPS $7.26 | UPS $8.22 | UPS $8.22 | UPS $8.76 | UPS $8.76 |
| 2 lb | UPS $6.40 | UPS $6.88 | UPS $7.73 | UPS $9.50 | UPS $9.50 | UPS $10.30 | UPS $10.30 |
| 5 lb | USPS $5.70 | USPS $5.83 | USPS $5.95 | USPS $5.97 | USPS $7.91 | USPS $11.17 | USPS $11.17 |
| 10 lb | USPS $11.14 | USPS $13.77 | UPS $16.98 | FedEx $18.31 | FedEx $22.64 | FedEx $24.76 | FedEx $24.76 |
| 20 lb | FedEx $14.42 | FedEx $17.42 | FedEx $23.56 | FedEx $25.30 | FedEx $29.87 | FedEx $34.88 | FedEx $34.88 |
| 50 lb | FedEx $19.01 | FedEx $28.51 | FedEx $37.37 | FedEx $43.59 | FedEx $52.75 | FedEx $58.62 | FedEx $58.62 |
Economy ground = USPS Ground Advantage; UPS Ground or Ground Saver (whichever is cheaper); FedEx Ground. Rates are commercial (discounted) carrier rates before any ShipWave markup.
The spread: what the wrong choice costs
For every cell we compared each carrier's cheapest ground service for the same box. The spread is how much more the most expensive carrier charges than the cheapest. A sample across all seven zones at four weights:
| Lane (zone) | Weight | USPS | UPS | FedEx | Cheapest | Spread |
|---|---|---|---|---|---|---|
| Philadelphia, PA (z2) | 2 lb | $6.77 | $6.40 | $14.42 | UPS | 125.3% |
| Philadelphia, PA (z2) | 5 lb | $5.70 | $7.58 | $14.42 | USPS | 153% |
| Philadelphia, PA (z2) | 20 lb | $50.84 | $17.05 | $14.42 | FedEx | 252.6% |
| Philadelphia, PA (z2) | 50 lb | $74.42 | $24.88 | $19.01 | FedEx | 291.5% |
| Pittsburgh, PA (z3) | 2 lb | $7.38 | $6.88 | $14.42 | UPS | 109.6% |
| Pittsburgh, PA (z3) | 5 lb | $5.83 | $8.13 | $14.42 | USPS | 147.3% |
| Pittsburgh, PA (z3) | 20 lb | $62.58 | $22.75 | $17.42 | FedEx | 259.2% |
| Pittsburgh, PA (z3) | 50 lb | $93.90 | $36.85 | $28.51 | FedEx | 229.4% |
| Chicago, IL (z4) | 2 lb | $8.18 | $7.73 | $17.21 | UPS | 122.6% |
| Chicago, IL (z4) | 5 lb | $5.95 | $10.66 | $17.48 | USPS | 193.8% |
| Chicago, IL (z4) | 20 lb | $74.96 | $26.99 | $23.56 | FedEx | 218.2% |
| Chicago, IL (z4) | 50 lb | $118.88 | $44.72 | $37.37 | FedEx | 218.1% |
| Dallas, TX (z5) | 2 lb | $9.52 | $9.50 | $14.42 | UPS | 51.8% |
| Dallas, TX (z5) | 5 lb | $5.97 | $13.67 | $15.02 | USPS | 151.6% |
| Dallas, TX (z5) | 20 lb | $86.24 | $38.77 | $25.30 | FedEx | 240.9% |
| Dallas, TX (z5) | 50 lb | $140.25 | $67.27 | $43.59 | FedEx | 221.7% |
| Denver, CO (z6) | 2 lb | $9.94 | $9.50 | $14.42 | UPS | 51.8% |
| Denver, CO (z6) | 5 lb | $7.91 | $13.67 | $16.10 | USPS | 103.5% |
| Denver, CO (z6) | 20 lb | $97.35 | $38.77 | $29.87 | FedEx | 225.9% |
| Denver, CO (z6) | 50 lb | $161.29 | $67.27 | $52.75 | FedEx | 205.8% |
| Phoenix, AZ (z7) | 2 lb | $10.80 | $10.30 | $15.11 | UPS | 46.7% |
| Phoenix, AZ (z7) | 5 lb | $11.17 | $15.26 | $17.23 | USPS | 54.3% |
| Phoenix, AZ (z7) | 20 lb | $108.46 | $44.96 | $34.88 | FedEx | 211% |
| Phoenix, AZ (z7) | 50 lb | $182.75 | $75.50 | $58.62 | FedEx | 211.8% |
| Los Angeles, CA (z8) | 2 lb | $10.80 | $10.30 | $15.11 | UPS | 46.7% |
| Los Angeles, CA (z8) | 5 lb | $11.17 | $15.26 | $17.23 | USPS | 54.3% |
| Los Angeles, CA (z8) | 20 lb | $108.46 | $44.96 | $34.88 | FedEx | 211% |
| Los Angeles, CA (z8) | 50 lb | $182.75 | $75.50 | $58.62 | FedEx | 211.8% |
Across all 42 cells the same-box ground spread averaged 129% (min 7.3%, max 291.5%). When you widen the comparison to every service a carrier quotes — from cheapest ground to fastest overnight — the gap for one box ranges from roughly 1076% to 4005%, a reminder that service selection matters as much as carrier selection.
The 2026 backdrop (sourced public facts)
These quoted rates land on top of a year of carrier price changes. The figures below are publicly announced carrier facts — not ShipWave measurements — included for context and cited to their sources:
- General rate increases (GRIs): UPS (effective Dec 22, 2025), FedEx (Jan 5, 2026), and DHL Express (Jan 1, 2026) each announced an average 5.9% increase for 2026 — the third straight year at 5.9% for UPS and FedEx.
- USPS: USPS raised its competitive parcel products on Jan 18, 2026 — Ground Advantage by 7.8% — and then layered a temporary, time-limited price change of about 8% on competitive parcels (Apr 26, 2026 – Jan 17, 2027). So the small-parcel shipper's effective 2026 increase ran higher than the headline 5.9% GRIs.
- USPS dimensional-weight change (dated): effective July 12, 2026, USPS lowers its DIM divisor from 166 to 139 and rounds dimensions up to the whole inch for Ground Advantage, Priority Mail, and Parcel Select — aligning USPS with UPS and FedEx and raising billable weight on lightweight, bulky boxes. (Supply Chain Dive)
- Surcharges beat the headline: residential, additional-handling, and weekly-variable fuel surcharges stack on top of base rates, so the effective 2026 increase on a typical e-commerce order runs well above 5.9%. Fuel surcharges change weekly; we re-pull them each edition.
Carrier GRI and surcharge figures are summarized from carrier announcements and logistics-industry reporting (e.g., Supply Chain Dive, FreightWaves). They are public facts, not measurements from ShipWave's engine. The quoted rates and spreads above are ShipWave measurements.
Methodology
- Source: ShipWave's live multi-carrier rate engine (powered by EasyPost). Each cell is a real shipment-rating call; we read the returned rate quotes. No label was ever purchased, so no rates were estimated or simulated.
- Basket: 1, 2, 5, 10, 20, 50 lb packages × USPS zones 2–8, all shipping from New York, NY 10001. One representative destination per zone; one representative box size per weight (held constant across zones).
- Lanes & zones: Philadelphia, PA (z2), Pittsburgh, PA (z3), Chicago, IL (z4), Dallas, TX (z5), Denver, CO (z6), Phoenix, AZ (z7), Los Angeles, CA (z8).
- Rate basis: commercial (discounted) carrier rates as returned to a ShipWave account, before any ShipWave markup. Carrier names are normalized to USPS / UPS / FedEx families.
- “Cheapest” definition: the lowest-priced economy-ground service per carrier — USPS Ground Advantage; UPS Ground or Ground Saver (whichever is lower); FedEx Ground.
- Date: all rates pulled June 22, 2026. Carrier rates and fuel surcharges change over time; this edition is a dated snapshot.
- Reproducibility: the basket and computation are fixed and scripted, so each quarterly edition is directly comparable to the last.
About this index
The ShipWave Parcel Rate Index is published by ShipWave, a multi-carrier shipping platform whose rate engine prices live shipments across USPS, UPS, FedEx, DHL, and regional carriers for e-commerce sellers. That vantage point lets ShipWave report which carrier is actually cheapest for a given package — from transactional quotes, not list prices. We publish it quarterly as a citable, dated benchmark.
Press & data requests: ShipWave can provide the full per-cell dataset and methodology on request. Figures may be cited with attribution to “The ShipWave Parcel Rate Index (Q3 2026).”
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