In-depth guides that explain how the federal and state tax systems actually work, compare state tax burdens, and walk through strategies to keep more of what you earn, built from official IRS and state revenue data.
The TaxCompare guide library is organized around the questions readers ask most often during filing season. Each guide opens with a short answer, walks through the underlying mechanics, links to the official IRS publication or state revenue authority page, and ends with a practical example. The goal is to demystify how the tax system works without giving filing-specific advice.
Federal tax mechanics — bracket stacking, the standard versus itemized choice, the difference between marginal and effective rates, how qualified dividends and long-term capital gains receive preferential rates — are covered in detail because misreading these mechanics is the most common source of filer confusion. State-level guides compare burden across the 50 states using the Tax Foundation's state-and-local data and add context on Social Security taxation, retirement-friendly states, and reciprocity agreements for multi-state remote workers.
The guides are informational only. They are not tax advice and they are not a substitute for a qualified preparer. Every guide that walks through a specific scenario notes the IRS publication or revenue procedure where the official rules live so you can verify directly.
Most people think moving into a higher tax bracket means all their income is taxed at the higher rate. That's wrong. Here's how marginal rates actually work, with real examples.
Read guide →A state-by-state breakdown of income tax rates, total tax burden, and what no-income-tax states actually cost you in other taxes.
Read guide →Practical, legal strategies to lower your federal and state tax bill, from retirement accounts and HSAs to tax-loss harvesting and strategic timing.
Read guide →Every dollar figure, bracket, and deduction in the guides traces to an authoritative source. Federal figures come directly from the Internal Revenue Service — typically Revenue Procedures (annual inflation adjustments), Publication 17 (the comprehensive individual-income guide), and form-specific instructions. State-level figures come from each state's Department of Revenue, cross-referenced against the Tax Foundation's annual state tax data. Where the guides reference legislative history, Congressional Research Service reports are cited directly. The full methodology is documented at /methodology.
The data is refreshed when the IRS or relevant state authority issues an update. Inflation-indexed thresholds change every fall via Revenue Procedure; statutory rate changes happen on legislative timelines and are incorporated when enacted.
No. The TaxCompare guides are informational explainers built from publicly published IRS, Tax Foundation, and state revenue authority data. They walk through how the federal and state tax systems work, what specific brackets and credits do, and where typical filers can find official rules. They are not personalized tax advice. For decisions about your own return, consult a qualified tax professional or CPA familiar with your situation.
The guides reference statutes for tax year 2025 as published by the IRS and state revenue departments as of the most recent refresh, April 2026. Inflation-indexed thresholds (federal brackets, standard deduction, capital gains breakpoints) are updated each fall by the IRS through Revenue Procedures; we refresh the guides when those documents are released. Mid-year statutory changes (such as state-level rate cuts enacted by legislatures) are incorporated as we become aware of them, but the official IRS and state publications remain the authoritative source.
All federal tax figures referenced in the guides come from official IRS publications (Revenue Procedures, Publication 17, and form instructions) at irs.gov. State figures come from each state's Department of Revenue and are cross-referenced against the Tax Foundation's annual state tax data at taxfoundation.org. Where the guides reference Congressional Research Service (CRS) reports, those citations are linked directly. We do not generate synthetic tax data — every number traces to an official source.
The guide library covers federal bracket mechanics (marginal versus effective rates, the progressive system), state tax comparisons (no-income-tax states, flat versus progressive structures, total state-and-local burden), filing-status rules, capital gains and qualified dividends, self-employment and quarterly estimated payments, retirement income treatment, and high-frequency questions about Social Security, multi-state remote work, and inheritance/estate tax. New guides are added when reader questions or major legislation create demand.
The guides explain how the brackets and deduction differ across filing statuses, which is the input you need to think about that question. They do not, however, compute your specific situation or recommend a status. The IRS publishes a Filing Status decision tool at irs.gov, and a qualified preparer can run both scenarios on your actual return. Choosing a filing status has consequences beyond income tax (eligibility for certain credits, IRA deduction phaseouts, etc.) that the guides flag but do not quantify for individual cases.