It has been announced that there will be Amazon US FBA (fulfilment by Amazon) fee increases coming in February 2018.
You can find the full details here.
As they say: “As in previous years, FBA fees in the U.S. will be adjusted to reflect the changing costs of fulfillment, transportation, and customer service. The new fulfillment fees will take effect on February 22, 2018. We’re notifying you now to give you time to plan for these changes.
FBA is introducing the following changes:
Fulfillment Fees: We will adjust our fulfillment fees for most product size tiers and weights. The adjusted fees will apply throughout the year, and we will no longer have a separate rate for October through December. For more information, see FBA Fulfillment Fees below.
Dimensional Weight Calculation: We are adjusting the way we calculate dimensional weight to align with current industry standards. Currently, dimensional weight is calculated as the unit volume (based on length x width x height in inches) divided by 166. Effective February 22, 2018, we will calculate dimensional weight as the unit volume (based on length x width x height in inches) divided by 139 (instead of 166). The dimensional weight is only applicable for large standard-size items weighing more than 1 lb. and all small, medium, and large oversize items.
FBA inventory storage fees are not changing at this time. We will announce changes to these fees in early 2018.”
You can see specifics regarding the Amazon US FBA fee changes in this table below. But you’re best to analyse all the info on the Amazon page itself.