Data Changelog

Every verification pass, correction, and schema change to our open datasets — dated, specific, and public. A freshness stamp you can audit beats one you have to trust.

Datasets covered: US state late-payment interest (51 jurisdictions — 51 rows individually re-verified, 51 with verbatim statute quotes) and VAT/GST standard rates (42 jurisdictions, official source per row). Both licensed CC BY 4.0 — downloads and file list at /data/, method at data methodology.

Next scheduled review: October 2026 — Florida's quarterly rate reset lands (the current label covers Jul–Sep 2026); all variable-rate states are re-checked on their official cycles.

  1. — Post-launch adversarial audit of the 51 per-state calculator pages — presentation corrections

    • A 7-reviewer adversarial audit of the new per-state pages flagged places where a verified figure was shown with the wrong role. No rates changed; the corrections re-label figures using facts already in each verified row.
    • Massachusetts and Connecticut: the headline figures (12% / 10%) are court-awarded rates, not automatic contract-silent defaults — pages now say so and no longer pre-fill the calculator with them. Tennessee: 10% is a statutory ceiling, not an automatic entitlement — same treatment.
    • New Hampshire: headline corrected to the 10% statutory default for business transactions (RSA 336:1, quoted verbatim on the page); the treasurer-set T-bill figure (5.7% for 2026) is now labeled as the litigation (pre-/post-judgment) rate it is.
    • Michigan-class fix: pages for states with no automatic pre-suit rate no longer emit a 'legal default rate' claim in the meta description or structured data.
    • Virginia and Texas: the calculators now honor the statutory accrual start (day 61 / day 30) instead of counting interest from day one.
    • Missouri: the verbatim-quote source link now points to RSMo § 408.035 (the section actually quoted) instead of § 408.020.
    • Demand-letter hand-off: the rate you calculated with now carries into the letter; previously it was discarded in statutory mode.
    • Second pass the same day (11 source-verification reviewers, primary sources fetched): Massachusetts headline moved to the 6% general legal rate of MGL c.107 § 3 (quoted verbatim; the 12% court-added rate in contract actions is now a labeled secondary line). South Dakota reclassified no-cap → conditional: SDCL 54-3-16(3) caps a rate that only appears on a bill, statement, or invoice at 18% — written-agreement rates remain uncapped (bucket split is now 27 no-cap / 11 conditional / 13 hard-cap).
    • Quote upgrades to actual operative text: New Jersey now quotes N.J. Court Rule 4:42-11(a) itself (from the Judiciary's official rule PDF) instead of the administrative rate notice; Tennessee now quotes Tenn. Code Ann. § 47-14-103 instead of a department press release (text via FindLaw's republication, disclosed in the cite, as the official portal is session-gated); West Virginia now quotes the 6% legal-rate sentence of W. Va. Code § 47-6-5 instead of the exemption section, and the 2026 court-set judgment rate (6.25%) now carries its official source.
    • Maine's current-year figure is now stated: 6.51% for 2026 — derived exactly per the statute's formula (1-year Treasury constant maturity, Fed H.15 weekly average for the last full week of 2025: 3.51%, plus 3 points), with the derivation shown on the page.
    • Georgia's written-cap bands corrected to match the quoted statute: $3,000 or less — 16% cap; more than $3,000 and under $250,000 — any written rate in simple-interest terms; $250,000 or more — any rate. Texas's weekly OCCC ceiling now carries an as-of week and a link to the official ceiling page. North Carolina's cap sentence rewritten for clarity against §§ 24-1.1, 24-9.
    • Source-link repairs: Oklahoma constitutional quote now links the Senate's official PDF of art. XIV; Wyoming's quote links the Legislature's section-level statute browser; Mississippi links the Legislature's designated code portal and the cite explains why the 2001 session-law text is quoted; New Hampshire consolidated on the canonical gc.nh.gov host. Each verbatim quote now carries a source-type classification (statute / constitution / court rule / session law), and pages describe the quote accordingly.
    • Rows re-verified against the primary source in this pass carry lastVerified 2026-08-21; rows only re-labeled keep their 2026-08-19 date. Indiana's live legislature site blocks automated access — its quote remains verified against the archived official text (rechecked character-for-character today), noted here for transparency.

  2. — E-invoicing mandates dataset published (34 entries: EU frameworks + country mandates)

    • New dataset: status, scope and phase dates of structured e-invoicing mandates per jurisdiction, plus the EU frameworks (ViDA / Directive (EU) 2025/516, EN 16931 / Directive 2014/55/EU, Peppol) — each entry verified against the official source (EU institutions, national tax authorities, or the standard body) and independently re-checked the same day, with a verbatim quote per entry.
    • Verify-pass corrections applied before publication: Italy's SdI scope corrected to persons resident or established in Italy (merely VAT-identified persons are not in scope, per Agenzia delle Entrate Circolare 26/E/2022).
    • Published as CSV + JSON under /data/ (CC BY 4.0) and as the human-readable tracker at /resources/e-invoicing-mandates/. One US federal-procurement entry that could not be confirmed on an official page ships labeled UNVERIFIED rather than guessed.

  3. — Full row-by-row re-verification of all 51 US jurisdictions (one researcher + one adversarial checker per state, primary sources only)

    • Verbatim statute quotes added to all 51 rows — the operative statutory language, quoted exactly, with an official source link per row.
    • Per-row lastVerified dates published on the page, in the CSV (row_last_verified column) and in the JSON.
    • Corrections from the re-verify: Missouri and New Mexico written-cap regimes reclassified to no-cap (bucket split is now 28 no-cap / 10 conditional / 13 hard-cap); Texas citation corrected to Tex. Fin. Code §§ 302.002, 303.002, 303.009; New Mexico citation/URL updated to NMSA 1978 §§ 56-8-3, 56-8-5, 56-8-9; Wisconsin's max-written analysis rewritten around Wis. Stat. s. 138.05(8)(c).
    • Current-period labels refreshed for the variable-rate states (e.g., Florida 8.06% for Jul–Sep 2026; Michigan 4.959% for Jul–Dec 2026).
    • CSV schema extended with row_last_verified, statute_quote_verbatim, statute_quote_cite and statute_quote_source_url columns.
    • Plain-text ranked mirror (/data/late-fee-ranked-2026.txt) and the /data/ directory index published.

  4. — Data methodology page published

    • /resources/data-methodology/ — source hierarchy (primary law first), two-pass verification, definitions, update policy, limitations, CC BY 4.0 licensing.

  5. — Datasets opened for download (CC BY 4.0)

    • US state late-payment interest published as CSV + JSON under /data/, regenerated from the verified source file at every build so the downloads can never drift from the page.
    • VAT/GST standard rates (42 jurisdictions, official tax-authority source cited per row) published as CSV + JSON.
    • B2B written-contract cap regime (no-cap / conditional / hard-cap) classified per state.

  6. — Initial verification of all 51 US late-fee jurisdictions and 42 VAT/GST jurisdictions

    • Each US state researched and independently re-checked against the controlling statute or the state's official current-rate page.
    • Each VAT/GST standard rate verified against a government source — the national tax authority where it states the figure, otherwise the European Commission's official portal or another official government page named in the row. One row (Kuwait, where no live government page states the status) cites a commercial tax summary and says so in its note.

How to watch this page: the URL is stable — re-fetch https://myinvoicetemplate.com/data/changelog/ (or the machine-readable mirror inside /llms-full.txt) to see whether anything changed since you last cited us. Corrections are welcome via the contact page; confirmed errors are fixed in the source data and logged here, never silently.

Not legal or tax advice. Each dataset's scope and limitations are described on its home page: late fee calculator & state table · VAT calculator & country table.