Open data reports
We publish the data behind our own work as open datasets. Each report states what was measured, how it was produced, and what it does not cover, and ships the underlying rows as CSV alongside a JSON summary.
Everything here is released under CC BY 4.0. Quote it, chart it, or build on it. All we ask is attribution and a link back to the dataset page.
2026 edition · updated September 2026
Calculator Formula Provenance: which published sources online calculators actually cite
As of October 2026, 168 of 526 calculators (31.9%) name the published source their formula comes from, with 207 citations to 171 distinct works.
Every calculator on this site, mapped to the published formula it implements and the body that issued it, with the share that name a primary source at all. Most free calculators cite nothing; this dataset is our own audit of how far we have closed that gap, published in full including the parts still uncited.
One row per calculator-source pair · CSV and JSON · CC BY 4.0
2026 tax year · updated September 2026
Federal Take-Home Pay by Salary, 2026: what a year of wages keeps after federal tax
In 2026, a single worker earning $75,000 in wages keeps $61,593 after federal income tax, Social Security and Medicare, so 17.9% of pay goes to federal taxes. A married couple filing jointly on the same wages keeps $64,623.
Annual federal income tax, Social Security, Medicare and take-home pay for wages from $20,000 to $1,000,000, for single, married filing jointly and head of household filers, computed from the IRS 2026 brackets and the SSA wage base.
One row per filing status and salary, 165 rows · CSV and JSON · CC BY 4.0
How to cite
Cite the specific report rather than this index, and include the edition year, because each edition is a separate snapshot. Every report page carries a ready-made citation line you can copy.
For how the underlying figures are produced and corrected, see our methodology.