Mavilian Financial Group
Financial Planning Tool

Estimated Tax Payment
Calculator

Calculate your quarterly estimated tax payments, check safe harbor requirements, and stay on track to avoid underpayment penalties.

Tax rates current as of: 2026 tax year. This calculator is for informational and educational purposes only and does not constitute tax, legal, investment, or financial advice. Any tax-related information is not intended or written to be used, and cannot be used, for the purpose of avoiding penalties under the Internal Revenue Code. Estimated tax calculations involve many variables not captured here, including but not limited to: state and local taxes, tax credits, alternative minimum tax (AMT), the 3.8% Net Investment Income Tax (NIIT), changes in income throughout the year, and annualized income installment methods. Safe harbor rules are simplified here and may not reflect your complete situation. Your CPA or tax professional may have already provided you with a quarterly estimated tax schedule based on your prior year return — this tool is intended to complement, not replace, that guidance. Consult with your CPA or qualified tax professional regarding your specific situation.
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Did your CPA provide a quarterly schedule? Many CPAs include estimated tax vouchers (Form 1040-ES) with your prior year return. If you received one, that schedule is based on your complete tax picture and should be your primary reference. Use this calculator as a quick check or to model changes in income.

Filing Status

Expected 2026 Income

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Gross wages before withholding
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Net profit from Schedule C, partnerships, freelance — after business expenses
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Taxable investment income expected this year
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Include taxable portion of Social Security
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Rental income, alimony received, gambling, etc.

Deduction

Withholding & Prior Year

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Federal income tax withheld from all W-2s for the year
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From your 2025 tax return
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Line 11 of your 2025 Form 1040

Estimated Payments Already Made

Enter any quarterly estimated payments you've already sent to the IRS this year. Leave blank for quarters you haven't paid yet.
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