Tools · Self-fulfilment
Is it cheaper to ship it yourself?
Two published numbers that had never been put side by side: what USPS charges a walk-in customer for postage alone, and what one 3PL publishes as an all-inclusive average for the same parcel.
For a 4 to 12 ounce parcel, USPS Ground Advantage retail postage runs $7.90 at zone 1 to $12.90 at zone 8. That is postage on its own: no box, no label, no one picking the item off a shelf.
Fulfyld publishes an all-inclusive average of $7.74 per order for the same 4 to 12 ounce band, and that figure already contains postage, pick and pack, packaging and the label.
The bundled average is below retail postage alone at every zone in the band, by $0.16 at the narrowest and $5.16 at the widest.
| Weight not over | Zone 1 | Zone 2 | Zone 4 | Zone 6 | Zone 8 |
|---|---|---|---|---|---|
| 4 oz | $7.90 +$0.16 | $8.05 +$0.31 | $8.30 +$0.56 | $8.75 +$1.01 | $9.45 +$1.71 |
| 8 oz | $7.90 +$0.16 | $8.05 +$0.31 | $8.30 +$0.56 | $8.75 +$1.01 | $9.45 +$1.71 |
| 12 oz | $9.55 +$1.81 | $9.95 +$2.21 | $10.60 +$2.86 | $11.35 +$3.61 | $12.90 +$5.16 |
Top line is USPS retail postage. Second line is that postage minus the $7.74 bundled average, so a positive number means the postage alone already costs more than the whole bundle.
What this does and does not tell you
It answers the self-fulfilment question. If you are shipping from your own kitchen table with no carrier contract, retail is the price you actually pay, and a 3PL's bundled average undercuts it on this band before you count your own labour, your boxes, or your time.
It does not tell you which 3PL is cheaper. A 3PL buys postage on a negotiated commercial contract that is never published, and it sits far below retail. Retail cannot narrow a comparison between two 3PL quotes, and we do not use it that way. Comparing quotes is a different job.
The $7.74 is an average, not a quote. Fulfyld publishes it as "Average Cost $7.74 +" and states these are real averages rather than your quote. We previously repeated it as a rate and logged the correction. It is also the 501 to 1,000 orders a month tier.
And once you ship volume yourself, retail stops being your price too. Commercial and online postage rates are below the counter price, so a growing brand is comparing two discounts rather than a discount against retail.
Sources, both published and both checkable. USPS retail prices from Notice 123, effective July 12 2026, read 2026-09-22. Fulfyld's all-inclusive average from its own pricing page, read 2026-09-11. All 666 USPS bands: carriers-usps.csv. The 3PL fee rows are a separate dataset, published here, because a government tariff and a vendor's price list answer different questions.