The Legal Numbers Dataset
Every number this site displays comes from a versioned rule pack — a small JSON file holding the figures, the official URL they were transcribed from, the date they were verified, and the date that verification lapses. Those files are public. You can read them, cite them, diff them, or query them from an assistant without asking us for anything.
- Verified packs
- 63
- Topics
- 5
- Last verified
- 2026-08-03
- Licence
- Free to cite
Coverage
| Topic | Verified | Awaiting verification |
|---|---|---|
| Spousal support | 7 | 0 |
| Child support guidelines | 3 | 0 |
| Negligence rules & damage caps | 34 | 5 |
| Property tax appeals | 9 | 1 |
| Will execution requirements | 10 | 4 |
The state tables, as CSV
The same data as the JSON packs, flattened one row per verified jurisdiction, for anyone whose tool is a spreadsheet rather than a fetch call. Every row carries its own source URL and verification date — a table torn out of its context is exactly how a figure loses its provenance, and a CSV is the most tearable format there is.
Comparative negligence, damage caps and limitation periods
34 verified rows · 9 columns
One row per verified state. The damage_caps column preserves the struck-down marker — a cap a state supreme court has voided is reported and never applied, and stripping that note is how a claimant gets told their recovery is limited when it is not.
Child support guideline models
3 verified rows · 8 columns
The guideline PARAMETERS (schedules, brackets, caps) are not flattened into this CSV — they differ in shape per model and belong in the JSON pack, where the engine reads them.
Spousal support — what each state publishes
7 verified rows · 8 columns
The publishes_for_the_amount column is the useful one and the reason this table exists: most states publish NOTHING for the amount. A row reading "nothing — factors only" means any dollar figure quoted for that state came from a guideline it never adopted.
Will execution requirements
10 verified rows · 11 columns
A witnesses value of "None required" is a real finding (Pennsylvania), not a blank. The electronic_wills column distinguishes enacted-but-not-yet-operative from in force — a post-dated statute is not law today.
Property tax appeal deadlines and procedure
5 verified rows · 12 columns
deadline_rule_kind is the column that matters: a "later_of" state means a late notice moves your deadline OUTWARD, which no static date can express. An empty assessment_ratio is a finding too — New York assesses at a per-municipality fraction and publishes no statewide one.
Generated in your browser from the packs already on this page — nothing is requested from a server, and a state absent from a file has not been verified rather than having no rule.
How to read it
https://legalbythenumbers.com/rulepacks/index.json— every pack, with its topic, jurisdiction, status and verification date.https://legalbythenumbers.com/rulepacks/<packId>.json— one pack: the figures plussourceUrl,sourceLabel,officialCalculatorUrl,effectiveDate,verifiedDateandstatus.https://api.cosyslabs.com/legalbythenumbers/mcp— the same data over MCP, so an assistant can compute and cite in one step. See /developers.
Rules we hold ourselves to
- Status is honest. A pack is only
verifiedif someone opened the official source onverifiedDateand transcribed what was literally there. Everything else stayspendingand carries no figures at all. - Pending earns nothing. An unverified pack produces no page, no sitemap entry, and no MCP answer — the tools refuse rather than guess.
- Sources are primary. Legislatures, courts, child support agencies, revenue departments and county assessors. Never a legal publisher, never a law firm, never us.
Using this data somewhere? A link back to legalbythenumbers.com is appreciated but not required. Found an error? Tell us with the source and we will re-verify.