Under 1 lb, Ground Advantage is cheaper than Priority Mail at every zone, retail or commercial. Above 1 lb it depends on distance and packaging, and the most common tie-breaker flipped in July 2026: a 5 lb box going coast to coast is now cheaper by Ground Advantage at commercial rates, while the Medium Flat Rate Box still wins at retail. The tables below show the numbers.
The two services do the same basic job. Both include tracking and up to $100 of insurance in the price, serve all 50 states and the territories, and take parcels up to 70 lb. Priority Mail's included coverage applies to most shipments, with restrictions on certain items and destinations. The difference comes down to what you're shipping, where it's going, and how fast it needs to arrive.
USPS raised its prices on July 12, 2026, and many published comparisons still show the old numbers. The figures on this page are the July 12 prices from the USPS price list, each labeled retail or commercial. They don't include the temporary holiday increase USPS applies from October 4, 2026 to January 17, 2027, which adds $0.40 to $9.10 per package depending on service, zone and weight. That increase doesn't change which service wins in any scenario below. Retail is the counter price at a Post Office. Commercial is the lower price you get through Click-N-Ship, a shipping platform, or a 3PL, and it is the price to compare if you buy postage through software.
Quick comparison
Feature | Ground Advantage | Priority Mail |
|---|---|---|
Delivery time | 2–5 days | 2–3 days |
Max weight | 70 lb | 70 lb |
Max size (length + girth) | 130 inches | 108 inches |
Insurance included | Up to $100 | Up to $100 on most shipments, restrictions apply |
Tracking | Included | Included |
Free carrier pickup | Yes | Yes |
Flat rate option | No | Yes (envelopes and boxes) |
Starting retail price | $7.90 (up to 8 oz, Zone 1) | $11.00 (1 lb, Zone 1) |
Starting commercial price | $6.93 (up to 15.999 oz, Zone 1) | $9.04 (up to 1 lb, Zone 1) |
Dimensional weight | Applies over 1 cu ft | Applies over 1 cu ft |
Prices come from the USPS price list, and service details from the USPS Ground Advantage and Priority Mail pages.
USPS Ground Advantage
Ground Advantage pricing is based on weight, size, and distance, measured in USPS shipping zones. A small package staying in your region costs a fraction of what the same package costs going cross-country. To check the zone between your ZIP code and a customer's, use our free USPS zone lookup. Delivery takes two to five days, and tracking is included.
Since July 12, 2026, commercial Ground Advantage pricing has been one flat band from 4 oz through 15.999 oz: a 4 oz parcel and a 15 oz parcel to the same zone cost the same. Retail pricing still steps up above 8 oz. If a small bubble mailer suddenly prices at $7.30 or $7.46 on your label platform, that is the commercial rate for anything under 1 lb to Zone 3 or Zone 4, not a platform error.
Ground Advantage rates (commercial, effective July 12, 2026)
Weight | Zone 1 | Zone 5 | Zone 8 |
|---|---|---|---|
4 oz to 15.999 oz | $6.93 | $7.69 | $8.40 |
1 lb | $7.61 | $8.74 | $10.67 |
2 lb | $7.99 | $9.95 | $12.87 |
3 lb | $8.64 | $11.57 | $15.75 |
5 lb | $9.70 | $13.48 | $19.19 |
10 lb | $11.91 | $16.76 | $25.34 |
20 lb | $16.46 | $24.93 | $40.39 |
Retail prices run higher: $7.90 in Zone 1 to $9.45 in Zone 8 for anything up to 8 oz, $9.55 to $12.90 from 12 oz through 1 lb, and $12.95 to $26.05 at 5 lb.
Two more Ground Advantage details affect the bill. Commercial cubic pricing charges by box volume instead of weight for small, dense parcels that would otherwise price by the pound: $7.45 for up to 0.10 cubic foot in Zone 1, rising to $12.02 for a full cubic foot in Zone 1 and $25.60 in Zone 8. And on both services, any parcel over 1 cubic foot is charged on the greater of its actual weight or its dimensional weight. For a fuller walkthrough of the service, see our USPS Ground Advantage explainer.
USPS Priority Mail
Priority Mail is the flat rate option. Pick a USPS flat rate box or envelope and the price stays the same no matter where it's going. Shipping small toys in a small box? You pay the same from New York to New Jersey as from New York to Texas. The package just has to be under 70 lb and fit in the standardized packaging. Delivery runs two to three days.
Priority Mail flat rate prices (effective July 12, 2026)
Package | Retail | Commercial |
|---|---|---|
Flat Rate Envelope | $12.90 | $11.12 |
Legal Flat Rate Envelope | $13.25 | $11.66 |
Padded Flat Rate Envelope | $14.00 | $11.99 |
Small Flat Rate Box | $13.65 | $12.10 |
Medium Flat Rate Box | $24.80 | $21.17 |
Large Flat Rate Box | $34.00 | $31.00 |
No zone math: the price is the same whether the box travels 50 miles or 3,000.
Priority Mail also has weight-based pricing for your own packaging. Retail starts at $11.00 for 1 lb in Zone 1 and $16.95 for 1 lb to Zone 8; there is no half-pound retail tier. Commercial starts at $9.04 for anything up to 1 lb in Zone 1 and $15.22 to Zone 8. At commercial rates, weight-based Priority Mail costs more than Ground Advantage at every weight and zone in Notice 123. A 5 lb parcel to Zone 8 is $29.18 commercial by Priority Mail against $19.19 by Ground Advantage, so the only time Priority Mail wins on price is when a flat rate box beats both.
When to use each
Scenario | Best option | Why |
|---|---|---|
8 oz subscription box, mostly local customers | Ground Advantage | $6.93 commercial in Zone 1, against $9.04 for weight-based Priority Mail or $11.12 for a Flat Rate Envelope, both commercial |
5 lb product shipping coast-to-coast | Ground Advantage at commercial rates; Medium Flat Rate Box at retail | Commercial: $19.19 for Ground Advantage to Zone 8 beats the $21.17 Medium Flat Rate Box. Retail: the box wins, $24.80 against $26.05. This answer flipped on July 12, 2026 |
Heavy, dense item under 70 lb | Priority Mail Flat Rate | Flat rate ignores weight. A 20 lb item that fits the Large Flat Rate Box ships for $31.00 commercial; Ground Advantage charges $40.39 for 20 lb to Zone 8 |
Lightweight items under 1 lb | Ground Advantage | $6.93 against $9.04 commercial, about 23% less. At retail it is $7.90 against $11.00 |
Customer is paying for faster delivery | Priority Mail | USPS lists 2–3 days for Priority Mail and 2–5 days for Ground Advantage |
Oversized package (over 108" L+G) | Ground Advantage | Priority Mail caps at 108"; Ground Advantage accepts up to 130" at its oversized price |
If you would rather not run this comparison on every order, Simpl Fulfillment ships by UPS, USPS, or FedEx and chooses the shipping method for each order, at a flat per-order rate that includes postage; carrier surcharges, when they apply, are billed per our terms. See our pricing.
Sources
- USPS price list, Notice 123
- USPS Ground Advantage
- USPS Priority Mail
- USPS insurance and extra services
- USPS 2026 holiday shipping price change
Updated October 2026