Depreciation
Spreading the cost of a long lived asset over years for tax; in real estate it is a deduction now and a bill at sale.
Where it is explained in full
How the wealthy pay less tax: the line between income and wealth, and the empty suite that does not exist. A friend earning two million a year asked how the very rich pay so little. The answer is not a secret and not a loophole. It is one line in the code, and everything else hangs on it. This page explains it, and corrects a story about commercial property that gets told at every dinner where the question comes up.
A definition says what a thing is; it never says whether it fits you. The guides explain how it works and name the professional who confirms it for a particular person. The No Advice Disclosure.
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