IRS Tax Hub
A dedicated U.S. tax workspace with an annual federal estimator, official IRS references, integration reality, and room for deeper filing modules.
United States
Build a cleaner annual tax estimate before you get anywhere near filing.
Compare filing status, withholding, self-employment, capital gains, and state or local layers with a faster path into the estimator.
Start here
How this estimate works
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Start here
How this estimate works
Choose filing status and the planning state first.
Layer wages, self-employment, capital gains, and withholding.
Compare the annual balance before and after state or local tax.
Annual federal estimator
Grounded in 2025 IRS brackets and standard deduction logic for practical annual planning.
Official-source backbone
Links directly to IRS rates, Publication 17, API access guidance, and MeF references.
Deeper module roadmap
Expanded with stronger state and local planning lanes.
Federal, state, and local planning estimator
Plan federal, state, and local taxes with a clearer annual view.
This module estimates annual U.S. federal income tax with state, city, and schedule-aware income layers for stronger planning.
Tax profile
Set filing status, planning state, and local layer.
Income mix
Blend wages, ordinary income, self-employment, and capital gains.
Adjust and compare
Apply deductions, credits, and withholding to preview the annual balance.
IRS tax planning snapshot
Blend wages, self-employment, capital gains, and local jurisdiction to preview a richer annual planning estimate.
Recent scenarios
Keep recent tax mixes ready to revisit without rebuilding every assumption.
State planning lanes
The IRS page now includes stronger planning lanes for California, New York, New Jersey, Pennsylvania, and no-income-tax states. This is still intentionally narrower than a full 50-state engine, and every lane is tied to an official public reference.
No state income tax estimate
Use this baseline if you only want to compare federal exposure or if you live in a state without personal income tax.
Federal-only planning lane
California
Uses California's 2025 resident rate schedules and adds the 1% Behavioral Health Services Tax on taxable income above $1,000,000 as a planning approximation.
2025 California tax rate schedules
Massachusetts
Uses the official Massachusetts 5.0% personal income tax rate as a planning approximation.
Massachusetts tax rates
New Jersey
Uses the official New Jersey rate schedules published for 2020 and after as a planning approximation for taxable income.
NJ income tax rates
New York
Uses New York State's 2025 rate schedule as a planning approximation. It does not include New York City, Yonkers, or the high-income recapture worksheets from the resident return instructions.
2025 IT-201-I state rate schedule
Pennsylvania
Uses Pennsylvania's official flat personal income tax rate of 3.07% as a planning estimate.
PA personal income tax FAQ
Washington
Washington does not have an individual income tax.
Washington Department of Revenue
Texas
Texas is used here as a no-state-income-tax planning lane.
Texas official reference
Florida
Florida does not have a personal income tax.
Florida Department of Revenue
Official IRS references
These are the primary references behind the current IRS page and the most relevant starting points for expanding this module responsibly.
IRS federal brackets
Current official federal income tax rates and brackets for tax year 2025.
Open IRS brackets
IRS Publication 17
Comprehensive federal income tax reference, including standard deduction guidance.
Open Publication 17
IRS Modernized e-File
Schema and business-rule documentation for individual e-file integrations.
Open MeF reference
IRS API access
Client ID and API onboarding guidance for approved IRS integrations.
Open API guidance
API and filing reality
The IRS has real technical integration paths, but they are not equivalent to a casual, public, free one-click filing API for any consumer calculator.
IRS has official integration paths, but not a casual public filing API
The IRS documents APIs, client IDs, and Modernized e-File schemas for approved flows, but this is not equivalent to a plug-and-play free filing API for any public calculator.
Receita Federal publishes official portals and software, not a public free DIRPF submission API
The official experience is still centered on Meu Imposto de Renda, gov.br services, and the DIRPF program. Public open-data APIs are useful for content and references, not for complete declaration transmission.
Best product path for SuperCalc is transparent estimation first
A trustworthy first version should explain scope, expose formulas, cite official sources, and avoid implying that a browser calculator is replacing the official filing workflow.
Benchmark repositories
Useful open-source references for computation benchmarking, architecture ideas, and understanding where estimators stop and full filing systems begin.
UsTaxes
Open-source U.S. filing application that is useful as a reference for workflows, form mapping, and scope boundaries.
tenforty
Lightweight Python library for U.S. federal tax calculations and some state logic; good reference for estimator engines.
policyengine-taxsim
Tax simulator built on PolicyEngine that helps benchmark calculator outputs and scenario modeling.
py1040
Personal U.S. income tax calculator reference focused on Form 1040 style computation logic.
IRS FAQ
Questions people usually have before trusting a tax estimate
This section is here to set honest expectations and make the IRS page easier to discover through search.
Does this IRS page file a real tax return?+
No. It is an annual planning and estimation page. It helps you understand likely federal exposure and a selected state planning lane, but it does not submit a real return to the IRS or to state agencies.
Why is state tax only available for selected lanes?+
State tax systems vary dramatically. This version focuses on a smaller set of lanes backed by official public references so the product can stay transparent instead of pretending to cover every rule in every state.
Does the New York lane include NYC or Yonkers tax?+
No. The New York lane is a state-level planning layer. It does not include New York City tax, Yonkers tax, or every high-income recapture worksheet in the resident return instructions.
Is the withholding result a guaranteed refund or amount due?+
No. The balance shown here is a planning snapshot based on the inputs you provide. Real returns can change with filing details, other forms, state adjustments, credits, and validation rules.
What is the best next upgrade for this IRS module?+
The strongest next step is a deeper state engine, then richer annual modules for itemized categories, schedule-aware income classes, and filing-readiness checks.