Above-the-Line vs Below-the-Line Deductions.

In plain English

The 'line' is your adjusted gross income (AGI), a subtotal on your tax return. Above-the-line deductions are subtracted before that line, which lowers your AGI itself. Examples include traditional IRA contributions, student loan interest, and HSA contributions. You can claim them whether or not you itemize. Below-the-line deductions come after AGI and generally require you to itemize on Schedule A instead of taking the standard deduction, such as mortgage interest, state and local taxes, and charitable gifts.

01Why it matters

Above-the-line deductions are usually more valuable because lowering your AGI can also qualify you for other tax breaks and credits that phase out at higher income. Below-the-line deductions only help if your itemized total beats the standard deduction.

02The math, step by step

Say you put $3,000 into a traditional IRA. That is an above-the-line deduction, so it lowers your AGI by $3,000 even if you take the standard deduction. Now say you paid $3,000 in mortgage interest. That is below-the-line, so it only helps if you itemize and your total itemized deductions beat the standard deduction. Two equal-sized deductions, but the first one helps almost everyone and may also open the door to income-limited credits.

03What this is NOT

04Receipts

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