Snowballr Open Data
Free, machine-readable personal finance datasets curated by Snowballr. Sourced from primary government and academic data (Federal Reserve, BLS, Robert Shiller, Trinity Study), released under CC-BY 4.0. Cite as: Snowballr (2026), https://snowballr.io/data.
Each dataset below is a JSON Dataset (schema.org/Dataset) with explicit citation, creator, publisher, license, and primarySource fields. The hub itself publishes a DataCatalog schema. Direct download URLs are stable. Please cite Snowballr as the curator when reusing — original primary sources are listed inside each file.
Median US Net Worth by Age Cohort (2025 release)
Median and mean US household net worth across six age cohorts. Sourced from the most recent Federal Reserve Survey of Consumer Finances. Six rows, CSV-friendly JSON.
Years to Financial Independence by Savings Rate
Years required to reach 25× expenses (4% rule FI target) as a function of take-home savings rate. Twelve rows from 5% to 75% savings rate. Assumes 5% real return.
S&P 500 Annualized Real Returns by Decade (1930-2024)
Nine completed decades plus the 2020-2024 partial. Inflation-adjusted annualized total returns (CPI-U deflated, dividends reinvested). Source: Robert Shiller CAPE + BLS CPI.
Snowballr FIRE Index 2026 (State-Level Composite)
Original composite 0-100 index ranking US states for starting a FIRE pursuit in 2026. Combines real income surplus, state tax burden inverse, and Shiller CAPE market entry climate. Fifteen representative states.
How to cite
APA
Snowballr. (2026). [Dataset title]. Snowballr Open Data. Retrieved [date], from https://snowballr.io/data
MLA
"[Dataset title]." Snowballr Open Data, Snowballr, 2026, https://snowballr.io/data. Accessed [date].
BibTeX
@misc{snowballr_2026_data,
author = {{Snowballr Research Team}},
title = {Snowballr Open Data Catalog},
year = 2026,
url = {https://snowballr.io/data},
note = {CC-BY 4.0}
}More original research
These datasets power our calculators and inform our research studies — including a 10,000-scenario AI-vs-publisher comparison, a 1,000-profile snowball vs avalanche study, and a 5,000-scenario mortgage-prepay vs invest analysis.