WooCommerce prices entered including VAT

Context

Somehow, you can choose to enter product prices in WooCommerce including VAT. But when it's about an international webshop, what VAT rate is that? The received wishdom seems to be, that it is the VAT rate associated with the location of the shop (Netherlands in my case):

When you enter prices including VAT, it is assumed that this is your local VAT rate or base VAT rate; the VAT rate associated with the store address

Product fields Tax status and Tax rate are the additional fields to determine the exact tax rate

Case: Prices keep changing - 2024.04

Simple: Prices were presented as calculated using the wrong base VAT rate - Quite a serious problem.

I think there were also some extra problems, but let's focus on this one first.

Additional information

• After removing a bunch of plugins and caching, the problem stayed the same, but what became clear (might have also been the case earlier): The wrong base rate was only applied when not logged in - Basically for visitors who would receive cached versions of the site (might just be a conincedence)
• When logging in, prices were ok. When logged out, prices were again incorrect.

Brainstorming causes

• Something with cashing? Unlikely, actually
• Something with wrong rates?
• Shop location "Netherlands" is interepreted differently than expected?

See also

• Task tk883

Sources

• https://wordpress.org/support/topic/products-prices-are-changing-on-its-own/

See also

• WooCommerce prices, locations & VAT