databutler.dev · /facts — every fact · Verified Facts protocol · /.well-known/facts.json · /changes

Online return deadline (2025-26)

2027-01-31 date

standing figure · verified 2026-10-04 against the official source

You must submit your online tax return by 11:59pm on 31 January 2027
key
uk/gov/self-assessment/online-deadline
value
2027-01-31 date
period
—
effective
— to date
source
https://www.gov.uk/self-assessment-tax-returns/deadlines
verified
2026-10-04 — fresh (33 days ago; next check by 2026-11-03)
next expected change
none named (irregular: changed by statute or order on no fixed date)
source checked
2026-11-02 (the newest day the automated check fetched the source page)
scope
UK Self Assessment for the 2025-26 tax year (6 April 2025 to 5 April 2026); dates roll forward each year.
hash
sha256:21dffcf568ac52db5e31fa294f0ed8301294cda5a24f2a4841318cd90bf88a4f
signature
EdDSA, key db-2026-10 — keys

As JSON

curl -s https://databutler.dev/f/uk/gov/self-assessment/online-deadline?max_age=30d — schema; verify with npx verified-facts verify https://databutler.dev/f/uk/gov/self-assessment/online-deadline

{
  "protocol": "verified-facts/0.3",
  "key": "uk/gov/self-assessment/online-deadline",
  "aliases": [
    "uk/gov/tax-return/online-deadline",
    "uk/gov/sa/online-deadline",
    "uk/gov/self-assessment-deadline/online-deadline",
    "uk/gov/mtd/online-deadline",
    "uk/gov/making-tax-digital/online-deadline"
  ],
  "label": "Online return deadline (2025-26)",
  "value": "2027-01-31",
  "unit": "date",
  "period": null,
  "effectiveFrom": null,
  "effectiveTo": null,
  "source": "https://www.gov.uk/self-assessment-tax-returns/deadlines",
  "quote": "You must submit your online tax return by 11:59pm on 31 January 2027",
  "verifiedDate": "2026-10-04",
  "nextScheduledRefresh": "2026-11-03",
  "changeCadence": "irregular",
  "nextExpectedChange": null,
  "sourceCheckedAt": "2026-11-02",
  "status": "fresh",
  "ageDays": 33,
  "maxAgeDays": null,
  "scope": "UK Self Assessment for the 2025-26 tax year (6 April 2025 to 5 April 2026); dates roll forward each year.",
  "hash": "sha256:21dffcf568ac52db5e31fa294f0ed8301294cda5a24f2a4841318cd90bf88a4f",
  "signature": {
    "alg": "EdDSA",
    "kid": "db-2026-10",
    "jws": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRiLTIwMjYtMTAifQ..hbxMzKSlicoiAtzDQJzDfhinUGjo_w3OgrOWBlgTpfNlqDo34ZziOyvbflNli1jiY_8Qa4Cm-ncSA19uoFeKBA",
    "keys": "https://databutler.dev/.well-known/jwks.json"
  },
  "publisher": {
    "name": "Data Butler",
    "url": "https://databutler.dev/"
  },
  "cite": {
    "url": "https://databutler.dev/facts/uk/gov/self-assessment/online-deadline",
    "text": "databutler.dev, verified 2026-10-04 against https://www.gov.uk/self-assessment-tax-returns/deadlines"
  }
}