Tax Knowledge Hub
Guides on deductions, retirement funds, and tax planning strategies — read one, then calculate your own tax right away.
Year-End US Tax Savings Checklist: 401(k), HSA and What Else Moves the Needle
A practical checklist of the deductions that can still lower your 2026 federal tax before the year ends, with a worked example showing what a maxed 401(k) and HSA can save.
Moving to Another State? How Your Take-Home Pay Changes
What changes and what doesn't when you move between US states, with the take-home change on a $100,000 salary for six common moves and a step-by-step way to check your own.
HSA Explained: The Triple Tax Advantage and 2026 Limits
How a Health Savings Account lowers your tax, the 2026 contribution limits of $4,400 and $8,750, a worked example, and where states treat it differently.
Marginal vs Effective Tax Rate: Why a Raise Never Makes You Take Home Less
The difference between your marginal and effective tax rate, with 2026 examples showing what a raise really does to your paycheck and which rate to use for which decision.
Filing Status: Single vs Head of Household vs Married Filing Jointly (2026)
How your filing status changes your standard deduction and tax brackets in 2026, with the same $100,000 taxed three ways, and what to check before you choose.
2026 Federal Income Tax Brackets Explained With Real Examples
The 2026 US federal tax brackets for single filers, married couples filing jointly and heads of household, how they are applied slice by slice, and worked examples.
Why Your Paycheck Is Smaller Than Your Salary: A Line-by-Line Breakdown
Where a $100,000 salary goes before it reaches your bank account — federal income tax, Social Security, Medicare and state tax — shown line by line in Texas, California and New York.
What Is FICA? Social Security and Medicare Tax Explained (2026)
How the FICA payroll tax works: the 6.2% Social Security tax and its $184,500 wage base, the 1.45% Medicare tax, the 0.9% Additional Medicare Tax, and why your deductions don't reduce it.
The 9 States With No Income Tax on Wages (and What It Really Means)
Which states charge no state income tax on salary, how much that saves at $50,000, $100,000 and $250,000 compared with the highest-tax states, and what it does not tell you.
Take-Home Pay on a $100,000 Salary in Every US State (2026)
How much of a $100,000 salary a single filer keeps in each of the 50 states and DC after federal tax, state income tax and FICA — ranked, with what the ranking leaves out.
401(k) vs Traditional IRA: Which Cuts Your Tax Bill More?
Compare contribution limits, tax treatment, and how much each account can shave off your federal and state tax in 2026, with worked examples.
US Standard Deduction 2026: What Single Filers Need to Know
A plain-English walkthrough of the 2026 federal standard deduction, how it lowers your taxable income with a worked example, and when itemizing might actually save you more.