19 — Earned Income Over $2,500 Threshold Updated for tax year 2025

What this line means

Your earned income from line 18a minus $2,500. If your earned income is $2,500 or less, this line is zero and the standard earned income method produces no additional child tax credit. The $2,500 threshold means very low earners need the alternative three-or-more-children method (line 21) or they get no refundable credit at all.

Does this apply to you?

• You are computing the additional child tax credit using the earned income method
• You have earned income and need to determine how much exceeds the $2,500 floor

Easy to overlook

Earned income below $2,500 produces zero additional credit under this method If you earned $2,000 in wages, this line is zero, line 20 is zero, and the standard earned income path yields no refundable credit. You would need three or more qualifying children and enough Social Security tax withheld to use the alternative method on line 21. Filers with very low earned income often expect a refundable credit that does not materialize. ¹ [SOURCE: IRC Section 24(d)(1)(B)(i) — $2,500 earned income threshold]

The $2,500 threshold is not indexed for inflation This threshold has been $2,500 since the Tax Cuts and Jobs Act. Unlike tax brackets and the standard deduction, it does not adjust annually. Over time, inflation effectively lowers this bar as wages rise, meaning more low-income filers clear the threshold each year. ² [SOURCE: IRS Schedule 8812 instructions — line 19 computation]

Watch out for this

Subtracting $2,500 from AGI instead of from earned income. Line 19 uses earned income from line 18a, not AGI. Earned income excludes investment income, retirement distributions, and other unearned sources. Using AGI inflates the calculation and overstates the credit.

Related lines on your return

• Line 18a — Schedule 8812 — Earned income; $2,500 is subtracted from this
• Line 20 — Schedule 8812 — 15% of this amount; the earned income method result
• Line 21 — Schedule 8812 — Alternative method for three or more children