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Quarterly Estimated Tax Calculator
Splits required annual estimated tax (expected tax − withholding, optionally floored by a prior-year safe-harbor amount) into four quarterly payments. Educational only.
Limitation: Educational estimate for U.S.
How to Plan Quarterly Estimates
Use one federal annual scenario.
Enter expected annual federal tax (from your own estimate or software).
Withholding vs estimates
Employees often cover liability with withholding; freelancers often need estimates. See the linked guide.
What Quarterly Results Mean
Suggested equal quarterly payment under a simplified planner—not IRS due-date penalty computations or Form 1040-ES vouchers.
Quarterly Estimate Examples
Remainder only
Scenario inputs
Primary result
$12,000 required annually ÷ 4.
Safe harbor higher
Scenario inputs
Primary result
Safe-harbor remainder $14,000 ÷ 4.
Educational estimate
Confirm with IRS.gov or a qualified professional before filing or changing payroll elections.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorEstimated Payment Formulas
Educational payment planner.
Formula
Remainder
required = max(0, expectedTax − withholding)
Safe harbor floor
required = max(required, max(0, safeHarbor − withholding))
Quarterly
quarterly = required ÷ 4
Scientific Background
Assumptions: user-entered expected tax and withholding; optional safe-harbor floor. Limitations: penalty safe-harbor eligibility, AGI thresholds for 110%, and Form 1040-ES timing not automated. Source: https://www.irs.gov/payments/estimated-taxes
Sources & review
Quarterly Estimated Tax Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
IRS digital assets / tax reference
Internal Revenue Service (IRS)
https://www.irs.gov/payments/estimated-taxesFree Calculator Hub methodology
Free Calculator Hub
/methodology
See our methodology and corrections policy.