Second Stimulus Check Calculator

Archived historical, non-current snapshot — dated July 9, 2026 (2026-07-09). The $600 adult and child amounts, 2019-AGI thresholds, Social Security number, and filing-record rules described below reflect the second Economic Impact Payment (PL 116-260, enacted December 27, 2020) and may not reflect current IRS guidance. Check authoritative sources for the applicable period before relying on this estimate.

The second stimulus check calculator estimates the second round of U.S. Economic Impact Payments from late 2020. This round was smaller than the first CARES Act payment but used a familiar structure: a base amount per eligible person, a filing-status income threshold, and a 5 percent reduction for income above that threshold. The calculator is written as a historical reference. It does not determine present eligibility, and it does not connect to IRS or Treasury records. Instead, it shows what the calculator’s formula produces from Social Security number status, filing or benefit-recipient information, filing status, qualifying children under 17, and 2019 adjusted gross income.

This page is intentionally separate from the stimulus check calculator, which models the first round with $1,200 adult payments and $500 child amounts. It is also separate from the third stimulus check calculator, where the American Rescue Plan used $1,400 per eligible person and counted qualifying dependents more broadly. If you are reviewing old deposits, IRS letters, or a tax return that involved the Recovery Rebate Credit, make sure the calculator matches the payment round you are studying.

What the second payment was

The second stimulus payment was authorized by the year-end relief legislation signed in December 2020. IRS described it as the second Economic Impact Payment. For many eligible households, it was issued automatically based on 2019 tax return information or certain federal benefit records. The payment amount was $600 per eligible adult and $600 per qualifying child under age 17 before the income phaseout. Married filing jointly counted two adults. Single and head-of-household filers counted one adult.

The calculator also includes two administrative switches. The eligible Social Security number switch must be on for any payment to display. The filing-record logic then asks whether a 2019 tax return was filed. If the user turns that off, the federal benefit recipient switch becomes relevant. Either a 2019 filing record or the benefit-recipient flag lets the calculator proceed. If both are absent, the estimate is zero and the result shows that no payment is estimated.

Inputs that drive the estimate

Choose the filing status used for the 2019 return or benefit-record estimate: single, head of household, or married filing jointly. Enter qualifying children under 17; the calculator floors the number, so 2.8 children is treated as 2 children. Enter 2019 adjusted gross income, not current income. The input label matters because the second-round advance payment generally relied on 2019 data. A later tax return could have reconciled a different amount, but that is outside this page’s calculation.

The calculator does not try to model every real-world eligibility detail. It does not ask about citizenship categories, incarcerated status, estates or trusts, whether another taxpayer could claim the person as a dependent, or payment tracing. It focuses on the mechanical estimate represented by the inputs. Treat it as a formula explainer for a dated program whose rules and IRS procedures changed over time.

Formula used by the calculator

The base payment is the eligible adult count plus qualifying children, multiplied by $600:

$\text{base payment} = \$600 \times \left(\text{eligible adults} + \text{qualifying children}\right)$

The adult count is 2 for married filing jointly and 1 for single or head-of-household status. The income threshold depends on filing status:

Income above the threshold reduces the base payment by 5 percent of the excess:

$\text{phaseout reduction} = 0.05 \times \max\left(0, \text{AGI} - \text{threshold}\right)$

Then the calculator floors the result at zero:

$\text{estimated payment} = \max\left(0, \text{base payment} - \text{phaseout reduction}\right)$

Finally, the Social Security number and filing or benefit-record checks are applied. If they fail, the estimate displayed by the calculator becomes $0.

Checking the primary result

Suppose a single filer had an eligible Social Security number, filed 2019 taxes, had two qualifying children under 17, and reported 2019 AGI of $80,000. The calculator counts one eligible adult and two qualifying children, or three people at $600 each. The base payment is $1,800. The single-filer threshold is $75,000, so the income excess is $5,000. Five percent of $5,000 is $250. The estimated second stimulus payment is therefore $1,800 minus $250, or $1,550.

Now change only the filing-record inputs. If “Filed 2019 taxes” is off but “Federal benefit recipient” is on, the same $1,550 estimate remains because the calculator treats the household as having a qualifying record path. If both the 2019 filing switch and the benefit-recipient switch are off, the estimate becomes $0. If the eligible Social Security number switch is off, the estimate also becomes $0. Those results come directly from the calculation and should be described as calculator behavior rather than a complete legal determination.

Historical context and comparisons

The second stimulus check arrived after months of debate over additional pandemic relief. It was smaller than the first round but faster to calculate because IRS had already built payment systems and because the calculatorula reused many earlier concepts. The $600 child amount made families with qualifying children eligible for larger checks, and those child additions also pushed the zero-payment income point higher. A single filer with no children phased to zero sooner than a single filer with two children because the latter started with a larger base payment.

For household planning, this old payment should be separated from recurring income. The budget calculator can place a one-time payment next to rent, food, debt, and savings categories. The annual salary calculator can translate pay into annual income, while the debt-to-income calculator can show how temporary relief did or did not change a monthly debt ratio. None of those tools changes the historical stimulus law; they simply help you interpret the payment in a broader financial picture.

Common mistakes

• Applying the first payment’s $1,200 adult amount to the second payment.
• Counting older dependents even though this calculator only adds children under 17.
• Using current income instead of the 2019 AGI specified by the calculator.
• Forgetting that the phaseout is based on income above the threshold, not all income.
• Ignoring the Social Security number and filing-record switches when matching the displayed result.

Sources

• IRS, Questions and answers about the second Economic Impact Payment — IRS historical guidance for the second payment.
• IRS, Economic Impact Payments: What you need to know — IRS overview of Economic Impact Payments.
• U.S. Treasury, About the CARES Act — Treasury COVID relief program context.