Standard deduction for investors

The standard deduction is a fixed annual deduction from income that reduces your taxable income. For 2024, it is $14,600 (single) or $29,200 (married filing jointly). Most taxpayers take the standard deduction rather than itemizing deductions. The standard deduction is adjusted annually for inflation. Understanding this amount is essential for calculating your tax bracket and effective tax rate.

How the standard deduction works

Gross income: $150,000 Standard deduction: $14,600 (2024, single) Taxable income: $150,000 - $14,600 = $135,400

Tax is calculated on the $135,400 taxable income, not the full $150,000.

The standard deduction saves roughly $3,500-$5,000 per person in federal tax (depending on bracket).

Itemize vs. standard deduction

You must choose: take the standard deduction or list out itemized deductions. You cannot do both. You choose whichever is larger.

Itemized deductions include:

• Charitable contributions
• State and local taxes (capped at $10,000)
• Mortgage interest
• Medical expenses (above a threshold)

For most investors with moderate incomes and homes, the standard deduction is larger. You take the standard deduction.

For high earners with large charitable contributions or high property values, itemizing may be better.

2024 standard deduction amounts

• Single: $14,600
• Married filing jointly: $29,200
• Married filing separately: $14,600
• Head of household: $21,900
• Qualifying widower: $29,200

For taxpayers 65+ or blind, the standard deduction is higher (add $1,850 for single, $1,500 for married).

Annual inflation adjustments

The standard deduction is adjusted annually based on inflation. The IRS announces the new amounts each October for the next tax year.

Rough trend: increases $200-$400 per year in normal inflation years.

Impact on taxable income and bracket

The standard deduction directly lowers your taxable income, which lowers your tax bracket.

Example: Single filer, $150,000 income.

Without standard deduction: taxable income = $150,000 → 24% bracket. With standard deduction ($14,600): taxable income = $135,400 → 24% bracket (still).

But if you were closer to a bracket boundary, the standard deduction might push you into a lower bracket, saving tax.

For investors: limited impact

Most investment income (capital gains, dividends) is added to gross income and then reduced by the standard deduction. So investment income gets the same standard deduction treatment as wages.

The one exception: some passive losses cannot be fully deducted and are carried forward, not covered by the standard deduction.

Dependent children with unearned income

A dependent child with only investment income has a lower standard deduction (roughly their unearned income up to the standard deduction amount). This limit prevents children from using the full standard deduction on investment income.

Interaction with tax credits

The standard deduction reduces taxable income but does not directly affect refundable tax credits (like the earned income tax credit). However, it affects your tax bracket and thus the value of credits.

See also