Data Sources
Our calculators rely on figures published by official authorities. The table below lists every regulatory dataset, its source, effective tax year, and review status. This page is generated directly from our data registry — it is never edited by hand.
- Author
- CentCompass
- Last Updated
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- 1 min read
| Dataset | Tax year | Status | Impact | Official source |
|---|---|---|---|---|
| IRS Rev. Proc. 2025-32 §2.01 Tables 1-4 (2026 tax rate tables) | 2026 | verified | Critical | US_FEDERAL_TAX_BRACKETS_2026 |
| IRS Rev. Proc. 2025-32 §2.14 (2026 standard deduction) | 2026 | verified | Critical | US_STANDARD_DEDUCTION_2026 |
| SSA Contribution & Benefit Base 2026 ($184,500); IRS Topic No. 751 (Social Security/Medicare rates); IRS Instructions for Form 8959 (Additional Medicare thresholds — not indexed for inflation) | 2026 | verified | Critical | US_FICA_2026 |
| IRS Notice 2025-67 (2026 retirement plan limits) | 2026 | verified | Critical | US_401K_LIMITS_2026 |
| IRS Notice 2025-67 (2026 IRA limits & Roth phase-out ranges) | 2026 | verified | Critical | US_IRA_LIMITS_2026 |
Datasets marked draft have not yet been checked against their primary source, and are kept out of indexable calculators until that check is done.
Sources
How this page is produced
Editorial process. CentCompass is maintained independently, and this page is written and checked against the official publications listed above before it goes live. There is no separate editorial reviewer. This page was last checked on . See our editorial policy.
How the calculations work. Every result comes from a small, unit-tested calculation engine rather than a spreadsheet or a hardcoded table. Loans use the standard amortization formula, growth uses compound-interest math, income tax applies the federal progressive brackets, and payroll applies Social Security and Medicare rules. Our methodology sets out each one.
Where the figures come from. Tax brackets, standard deductions, FICA parameters, and contribution limits are stored once in a dated registry and read directly by the calculators — the same values appear in the text above, so the two can never drift apart. Each figure records its source, effective tax year, and review status on our data sources page.
Update policy. Regulatory figures are checked against their primary source when the IRS, SSA, or another authority publishes new values — typically each autumn for the following tax year — and again at the scheduled review date recorded for each dataset. Figures that have not been checked yet are marked as draft on the data sources page until that check is complete.
Educational purposes only — not financial, tax, or investment advice (disclaimer).