Disclaimer

TaxArith calculators estimate selected US federal tax amounts. They do not calculate state, local, municipal, foreign, property, sales, or other non-federal taxes. A federal estimate may therefore differ substantially from your total tax obligations.

The current calculators apply only to the 2026 tax year. Do not use their thresholds, rates, deductions, credits, or due-date assumptions for another year. Tax rules can differ materially from year to year.

TaxArith does not prepare, complete, review, sign, transmit, or file a tax return. Calculator results are not a substitute for the forms, schedules, worksheets, substantiation, elections, and disclosures a complete return may require.

References and links to IRS publications are provided so users can review official source material. Their presence does not make TaxArith output an IRS determination or official calculation.

TaxArith content and results are general information, not tax, legal, accounting, or financial advice. Using the site does not create a professional, advisory, fiduciary, preparer, or representative relationship.

Results depend on the completeness, accuracy, classification, and timing of the information you enter. TaxArith does not independently verify income, basis, withholding, filing status, dependent facts, deductions, credits, elections, or other entries.

Omissions, duplicate amounts, incorrect assumptions, or values entered in the wrong field can produce a misleading result even when the calculator operates as designed.

Each calculator is focused on a defined topic and may not account for every exception, election, phaseout, limitation, carryover, filing requirement, form interaction, special tax, or individual circumstance. Explanatory notes and assumptions on each calculator page are part of understanding its scope.

TaxArith does not promise that an estimate will match a filed return, IRS processing, a professional calculation, or later guidance.

Some 2026 rules may initially be reflected in draft IRS forms, instructions, preliminary guidance, or other materials that can change. Any assumption based on draft or preliminary material must be checked again after the IRS publishes final forms, instructions, and guidance.

Before filing a return, making a payment, claiming a tax position, or taking another consequential action, review the current IRS forms, instructions, publications, and guidance that apply to your facts. Consider consulting a qualified tax professional for advice based on your complete circumstances.

You remain responsible for your tax filings, payment decisions, supporting records, deadlines, and compliance obligations.