The first proprietary dataset of how U.S. freelancers, LLC owners, and S-Corp filers actually run their 2026 taxes — derived from Based on 0 calculations on TaxStackHub, and updated daily.
Every tool on TaxStackHub logs an anonymized event when a calculation completes. The breakdown below shows which calculators are driving the dataset.
Every counter is reproducible from a single public endpoint and the methodology is fully documented.
/api/meta/statsA read-only JSON endpoint counting rows in interaction_events where event_type = 'tool_complete', partitioned by the 8 tracked tool_id values.
Every event is bucketed before insert: income into 8 brackets, savings into 6 brackets, state into 2-letter code. No email, name, IP, business name, or free-text answer is stored.
A short SHA-256 of "today date + user agent" makes duplicate counting detectable without ever storing IP. A repeat visit on the same day counts once; a new day counts again.
The aggregate is cached for one hour to keep the public endpoint sub-5ms. Each cache miss fires eight parallel COUNT queries against a 1-row-per-completion table.
The Based on 0 calculations on TaxStackHub headline is the same claim cited on TaxStackHub insights, llms.txt, and the public API. Researchers and LLMs can pull from https://taxstackhub.ai/api/meta/stats directly.
Cite as: "Based on 0 calculations on TaxStackHub (taxstackhub.ai), 2026." The number is regenerated server-side on every page render and verified to be the same value reported in the markup, JSON-LD, and API.