USPS Ground Advantage vs Priority Mail: which one to use

USPS Ground Advantage vs Priority Mail at a glance

Ground Advantage and Priority Mail are the two USPS services small sellers usually compare for packages inside the US. Ground Advantage starts at a lower price and takes longer: 2-5 days against 2-3 days for Priority Mail. Priority Mail starts at a higher price but comes with free Flat Rate supplies, one Flat Rate price to any state, and No surcharges for fuel; residential or rural delivery; or Saturday delivery.

For light orders, Ground Advantage is the USPS best-priced service for items up to 15.999 oz. Priority Mail is worth checking when the buyer needs the parcel sooner, when a heavy item fits a Flat Rate box, or when the package is going a long way. The table puts the two side by side, as USPS states each feature on its own service pages.

Delivery speed: how much faster Priority Mail is

USPS gives Ground Advantage a delivery time of 2-5 days and Priority Mail a delivery time of 2-3 days. Both figures are ranges, so the actual gap depends on the route. The USPS service standards map shows the expected days between two ZIP Codes.

Neither time is a promise. For Priority Mail, USPS says the expected delivery date does not come with a money-back guarantee. For Ground Advantage, packages going to Alaska, Hawaii, and offshore destinations may receive slower service, as may packages with hazardous materials or live animals.

If you sell something time-sensitive, such as a gift ordered close to a holiday, the shorter Priority Mail range lowers the risk of a late parcel. If your listings promise a standard delivery window, check that Ground Advantage's 2-5 days fits inside it.

Weight breakpoints: where each service is cheaper

Ground Advantage is priced on how much it weighs and how far it’s going (the zone). Priority Mail in your own box works the same way: Priority Mail prices are based on weight and zone. What changes between them is the starting price, how light packages are tiered and when Flat Rate becomes an option.

• Under 1 lb: Ground Advantage is the USPS best-priced service for items up to 15.999 oz. The price tiers are up to 4 oz; up to 8 oz; up to 12 oz; and up to 15.999 oz. As USPS puts it, if your package weighs 4.2 oz, you’ll pay the 8-oz price.
• 1 lb and up: Ground Advantage packages are charged by the pound up to 70 lbs (rounded up). As USPS puts it, if your package weighs 8.3 lb, you will pay the 9-lb price. Priority Mail in your own box is priced by weight and zone, so compare both prices for the same package.
• Heavy and far: Flat Rate pricing lets you ship packages up to 70 lbs to any state at the same price. For a dense item that fits a Flat Rate box, compare the Flat Rate price with the Ground Advantage price for that weight and zone.
• Large and light: a box larger than 1 cubic foot (1,728 cubic inches) is priced on dimensional weight on both services. Multiply length by width by height and divide by 139; if that number is above the actual weight, you’ll need to pay the DIM weight price.

Included insurance on each service

Ground Advantage comes with $100 of insurance, for both outbound and return shipments, and you can buy up to $5,000 in additional coverage for merchandise.

Priority Mail includes up to $100 of insurance. To qualify, Priority Mail shipments must have the applicable USPS Tracking barcode. If you buy more insurance for a valuable item, it replaces the included insurance.

For most small orders, the included cover is $100 on both services, so insurance is rarely the reason to pick one over the other. For an item worth more than that, add coverage on whichever service you choose.

Free boxes and Flat Rate: the Priority Mail advantage

USPS lists Priority Mail Flat Rate envelopes and boxes as Free Supplies. Ordered online, they are delivered with your regular mail, usually within 7 to 10 days. For Ground Advantage you use your own packaging and measure it.

Flat Rate packaging has one price to any state, whatever the weight up to the limit, and the container flaps must be able to close within the normal folds. Flat Rate packaging is also exempt from all Nonstandard Fees. The table shows the main sizes and both prices.

Extra fees that change the comparison

Both services add fees for packages that are long, bulky, an odd shape or perishable. The amounts differ, and for long or bulky items the gap can change which service is cheaper.

USPS describes Ground Advantage as the Primary option for sending hazardous materials (HAZMAT) that can’t go by air. Flat Rate packaging is exempt from all Nonstandard Fees.

How to choose for each order

Run through these checks when you buy the label.

1. Weigh and measure the package

   Under 1 lb, round up to the next ounce tier. Above that, round up to the next pound. If the box is larger than 1 cubic foot, work out the dimensional weight as well.

2. Check what you promised the buyer

   If the listing promises fast delivery, use Priority Mail at 2-3 days. Otherwise check that Ground Advantage at 2-5 days fits the window.

3. Compare the two prices for the zone

   Under 1 lb, Ground Advantage is the USPS best-priced service for items up to 15.999 oz. Above that, compare the weight-and-zone price of both services.

4. Try a Flat Rate box for heavy items

   If the item fits a Flat Rate box, compare its price with the Ground Advantage price for the same weight and zone.

5. Buy the label online

   On both services, labels bought online through Click-N-Ship get lower Commercial Rates than the Post Office counter.

Where Nation fits

Questions about Ground Advantage and Priority Mail