taxable income
The part of your income that tax is actually worked out on.
Gross income less allowable deductions; the base to which statutory rates apply.
What that means in practice
Your pay is not your taxable income. Deductions come off first, and what is left is the figure the brackets are applied to. This is why two people earning identical salaries can owe different amounts — the gap is in what came off before the calculation started.
Taxable income is the statutory base after adjustments and deductions. ⚠️ It is distinct from gross income, from adjusted gross income, and from the wage base used for payroll taxes — four different quantities routinely conflated in casual discussion. State definitions frequently diverge from the federal one, which is why a state's headline rate cannot be compared with another's without knowing what each applies to.
Questions people ask
Who decides this — the federal government or my state?
Each level sets its own. taxable income federally and taxable income in your state are separate rules. They just share a label. That is why the two returns rarely agree.
Do I need to understand other terms before this one makes sense?
Usually, yes. taxable income sits in a small cluster of related ideas rather than standing alone. The linked terms below are the ones it leans on. Reading it in isolation causes most of the confusion about it.
Is this the standard name for it?
This one has a single accepted name. That makes it easier to look up than much of the vocabulary around it.
At which level of government is this determined?
Income tax concepts are defined independently at federal and state level. States may conform to the federal definition, conform selectively, or define their own; conformity is legislated and can be static (tied to a fixed date) or rolling. ⚠️ A federal change therefore propagates to some states automatically and to others only by subsequent state action.
What conceptual dependencies does this term carry?
This term has multiple conceptual dependencies, enumerated in the related-terms list. Definitions in tax law are frequently mutually referential — a provision's meaning depends on defined terms elsewhere in the code — so isolated reading commonly produces error.
Is this designation the settled one?
This designation is the settled term of art with limited alternative usage, so it maps reliably to statutory and agency references. Terms with multiple colloquial designations require more care when searching source material.