[SilasX]

You're right that a lot of those cases are tricky or ambiguous. It makes some calculations all but impossible.

Why would you think sales tax is one such case? Is it really that difficult to back out how you don't have that 8-10% to spend? Does it really justify confidently telling someone they don't know their tax rate because they included it?

(FWIW, the "employer's" side should be included too but can be misleading in conventional contexts because you'd have to restate your pretax income to include that as well, when it is generally not understood to. But it's fairly characterized as part of your burden.)

[harryh]

Ya, I could estimate sales tax for sure. I just don't have precise records like I do for income tax where I can just look at last year's 1040[1]. Instead I would have to think about how much I spent last year on goods & services subject to sales tax. And I don't even really know what's subject to that and not in some cases tbh. I spend a lot on rent and daycare and other things not subject to sales tax. Really it probably only applies to a relatively small % of my spending personally.

Also not all of sales tax really falls on me. Some % falls on the provider of the goods in the form of lower prices. It depends on the price elasticity of the product in question. Taking this into account would only further complicate the question.

[1] I'm a very precise record keeper of my income taxes now after I screwed something up years ago which cost me $$$. I keep everything in a github repository. It's pretty awesome actually. Highly recommended!

[SilasX]

>Also not all of sales tax really falls on me. Some % falls on the provider of the goods in the form of lower prices. It depends on the price elasticity of the product in question. Taking this into account would only further complicate the question.

That's true for all taxes, but not a reason to arbitrarily clip (only) one out and tell someone he's wrong for including it.

[harryh]

Ya, that's a reasonable point. If there were no income taxes, my employer could probably hire me for a lower salary.

Tax incidence is fun!