{
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  "id": "https://egly443.github.io/Govviz/data/series/hmrc-tax-gap.json",
  "title": "Tax gap",
  "description": "Tax not collected as % of total theoretical liabilities",
  "producer": "HMRC, Measuring tax gaps",
  "statisticType": "Official Statistic",
  "measure": "Tax not collected as % of total theoretical liabilities",
  "unit": "percent",
  "unitMultiplier": 0,
  "unitLabel": "percent (%)",
  "geography": null,
  "geographyLabel": null,
  "periodicity": "P1Y",
  "validRange": {
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    "max": 12
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  "revisionStatus": "final",
  "licence": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "provenance": {
    "source": "HMRC, Measuring tax gaps",
    "methodology": "https://www.gov.uk/government/statistics/measuring-tax-gaps",
    "derivation": "Direct from source; latest value validated against validRange",
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    "hm revenue & customs",
    "service",
    "compliance",
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    "productivity",
    "public finance"
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  "subjectUris": [
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    "https://www.gov.uk/government/statistics/measuring-tax-gaps"
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  "qualityDimensions": {
    "accuracy": "Not asserted by Govviz; upstream producer methodology remains authoritative.",
    "completeness": "20 observations emitted in the tidy data file.",
    "uniqueness": "One observation per period/ref_area key in the emitted tidy table.",
    "consistency": "Compiled by the same source-specific parser and emitted through one CSVW schema.",
    "timeliness": "Latest observed period 2024 is older than the expected annual cadence projection 2025-12-31; latest source fetch recorded 2026-07-02.",
    "validity": "Latest source values passed the published validRange 3 to 12."
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  "publisherClaim": "not-asserted-by-primary-publisher",
  "nextRelease": null,
  "nextReleaseEstimated": false,
  "expectedCadence": "annual",
  "latestObservedPeriod": "2024",
  "latestFetchedAt": "2026-07-02",
  "estimatedNextPeriod": "2025-12-31",
  "freshnessStatus": "aged",
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  "conformanceLevel": "M5-reference-rendering",
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    "Freshness metadata is inferred from observed periods and fetch timestamps; it is not an official release calendar.",
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    "No upstream policy-as-code conformance assertion has been made by the primary producer."
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  "distribution": [
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  "agent": "https://egly443.github.io/Govviz/data/mcp.json",
  "basis": null,
  "caveat": null,
  "lens": "process",
  "goodDirection": "down",
  "department": {
    "code": "hmrc",
    "name": "HM Revenue & Customs"
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  "observationCount": 20
}