Volume discounts: the unit rate falls only when the checkout grows
A volume discount is a lower published unit rate attached to a larger purchase quantity. It changes the bill by requiring the buyer to pay for the larger tier before receiving the lower rate. The discounted dollars per GB or per IP cannot be detached from that tier and applied to a smaller order. The receipt is the full package total, including capacity the buyer may not use.
A lower rate with a much larger bill
Decodo’s Residential, monthly bandwidth plan shows the bill effect directly. Its published ladder spans 3 to 1,000 GB. The 3 GB tier costs $11.25 at $3.75 per GB, the 100 GB tier costs $275 at $2.75 per GB, and the 1,000 GB tier costs $2,000 at $2 per GB. The unit rate falls by 46.7% from the first tier to the last, while the checkout rises from $11.25 to $2,000. All of those published totals are before VAT. Decodo residential volume pricing, retrieved 2026-07-25T15:31:32Z
A buyer who needs 3 GB therefore cannot multiply 3 by the advertised $2 large-volume rate and claim a $6 bill. The provider attaches that rate to a 1,000 GB purchase, so the corresponding receipt is $2,000 before VAT. Choosing the larger tier to reduce the unit rate would add $1,988.75 to the published checkout and leave 997 GB unused if demand stayed at 3 GB. Decodo published residential ladder, retrieved 2026-07-25T15:31:32Z
The same rule applies to address packages. If a provider lowers dollars per IP as the address count grows, the lower rate belongs to the complete IP quantity. A valid comparison finds the cheapest published tier that covers the requirement and carries its entire checkout into the result.
How many providers publish a ladder
In the current 710-row dataset, 30 of 47 providers publish a nonempty tiers field on at least one plan. Twenty-seven of 47 publish a row with more than one recorded tier. After comparing quantities with their published per-GB or per-IP rates, 23 of 47 providers have at least one ladder where the unit rate falls at a higher quantity. The remaining providers do not publish that field in a form that proves a volume discount. Current tier publication data
A tier field is evidence of purchasable points, not proof that every larger point is better. Some ladders keep the unit rate flat, and some totals are non-monotonic. Compare every covering tier rather than stopping at the first one that satisfies the requirement.
Finally, keep the minimum checkout cost, expiry, commitment, rollover, tax state, and promotion state beside the volume rate. A lower unit rate saves money only when the purchased quantity is usable within its terms and the larger checkout is less expensive than the buyer’s real alternatives.