Tax Guides
Plain-language explainers for common tax topics. No jargon, no sales pitches, just clear information.
How these guides are organized
Each guide is anchored to a specific IRS publication or revenue procedure and updated when the underlying source changes. Start with How tax brackets actually work if you're new to marginal rates, read standard vs. itemized for published deduction rules, or read quarterly estimated taxes for IRS payment schedules. Every guide cites primary sources (IRS publication number or revenue procedure) - none of it is summarized from third-party blogs.
Cross-reference: tax calculator · bracket lookup · federal tax statistics · state comparison · state tax burden ranking · all tools
Topics by IRS publication area
Each cluster maps to a primary IRS publication or form family. Guides cite the underlying source tables, they describe published federal parameters, not individual filing recommendations.
Ordinary income brackets and rates
Source family: IRS Revenue Procedures · Publication 17
- How Tax Brackets Actually Work
The marginal rate system explained with examples. Why your effective rate is always lower than your top bracket.
- Marginal vs. Effective Tax Rate
What the two rates mean, why your effective rate is always lower, and how the IRS applies each rate. Includes rate comparison table.
- Federal Tax-Rate Reference by Filing Status
IRS-published bracket thresholds and standard deductions for 2025 and 2026, without personal recommendations.
Deductions and credits
Source family: IRS Publication 501 · Publication 596
- Standard vs. Itemized Deductions
Published standard-deduction amounts, Schedule A categories, and the $40,000+ SALT cap.
- SALT Deduction Cap: $40,000 Limit Explained (2025-2026)
The OBBBA-raised SALT cap ($40,000 in 2025, $40,400 in 2026), the high-earner phase-down, pass-through entity tax workarounds, and the scheduled 2030 reversion.
- Child Tax Credit: Complete Guide
Eligibility rules, 2025 amounts, refundable ACTC portion, income phase-outs, and how to claim on Schedule 8812.
Self-employment and quarterly payments
Source family: IRS Publication 505 · Form 1040-ES
- Estimated Quarterly Taxes: Complete Guide
Who needs to pay, when payments are due, how to calculate the right amount, and penalties for underpayment.
- Self-Employment Tax Explained, the 15.3%
Why freelancers owe 15.3% on top of income tax, the 92.35% adjustment, the half-deduction, and S-corporation wage rules.
Advanced federal parameters
Source family: IRS Form 6251 · Publication 969
- Alternative Minimum Tax (AMT) Explained
Who pays AMT, how Form 6251 works, 2025/2026 exemption amounts, phase-out thresholds, and ISO spread mechanics.
- HSA vs. FSA: Tax-Advantaged Health Accounts
Eligibility rules, published contribution limits, and IRS tax treatment for health savings and flexible spending accounts.
All guides
How Tax Brackets Actually Work
The marginal rate system explained with examples. Why your effective rate is always lower than your top bracket.
Estimated Quarterly Taxes: Complete Guide
Who needs to pay, when payments are due, how to calculate the right amount, and penalties for underpayment.
Standard vs. Itemized Deductions
Published standard-deduction amounts, Schedule A categories, and the $40,000+ SALT cap.
Marginal vs. Effective Tax Rate
What the two rates mean, why your effective rate is always lower, and how the IRS applies each rate. Includes rate comparison table.
Federal Tax-Rate Reference by Filing Status
IRS-published bracket thresholds and standard deductions for 2025 and 2026, without personal recommendations.
Alternative Minimum Tax (AMT) Explained
Who pays AMT, how Form 6251 works, 2025/2026 exemption amounts, phase-out thresholds, and ISO spread mechanics.
Child Tax Credit: Complete Guide
Eligibility rules, 2025 amounts, refundable ACTC portion, income phase-outs, and how to claim on Schedule 8812.
SALT Deduction Cap: $40,000 Limit Explained (2025-2026)
The OBBBA-raised SALT cap ($40,000 in 2025, $40,400 in 2026), the high-earner phase-down, pass-through entity tax workarounds, and the scheduled 2030 reversion.
HSA vs. FSA: Tax-Advantaged Health Accounts
Eligibility rules, published contribution limits, and IRS tax treatment for health savings and flexible spending accounts.
Self-Employment Tax Explained, the 15.3%
Why freelancers owe 15.3% on top of income tax, the 92.35% adjustment, the half-deduction, and S-corporation wage rules.
Methodology
Our guides are based on publicly available data from authoritative government sources. All statistics, ratings, and figures cited in these guides are drawn directly from official datasets and publications, with sources clearly referenced throughout.
We aim to present complex government data in plain language that is accessible to general audiences. When methodologies differ between data sources or change over time, we note these variations inline. Our editorial process includes regular reviews to ensure accuracy and timeliness of the information presented.
Download the compiled IRS ordinary-income bracket table: federal-tax-statistics.csv (same extract as /statistics; CC0 / U.S. government source figures).