# When does the tax year start: Filing Deadlines Penalties

> The Filing Deadlines Penalties carries 2 published figures read from 2 sources' own pages, from 200 to 300 GBP, read 17 October 2026.

Taxyearvo · https://taxyearvo.com/datasets/filing-deadlines-penalties/ · computed 2026-10-18

**Range of the published figures:** 200 to 300 GBP (range 200 to 300 GBP; 2 sources with a figure; 2 of 15 sources read publish one).

2 of the 15 named sources read in full publish a figure; 13 publish none, read 17 October 2026.

## By penalty

| Breakdown | Median | Range | Sources |
|---|---|---|---|
| penalty mtd-late-submission | 200 GBP | 200 to 200 GBP | 1 |
| penalty self-assessment-12-months-late | 300 GBP | 300 to 300 GBP | 1 |

## Every figure, with its source

One row per source: the figure the source's own page publishes, the page, and the day it was read.

| Source | Figure | Breakdown | Read |
|---|---|---|---|
| [GOV.UK Self Assessment tax returns: penalties](https://www.gov.uk/self-assessment-tax-returns/penalties) | 300 GBP | self-assessment-12-months-late | 2026-10-17 |
| [GOV.UK penalty points and penalties if you submit your VAT Return late](https://www.gov.uk/guidance/penalty-points-and-penalties-if-you-submit-your-vat-return-late) | 200 GBP | mtd-late-submission | 2026-10-17 |

## The sentence each figure was read from (2)

- [GOV.UK Self Assessment tax returns: penalties](https://www.gov.uk/self-assessment-tax-returns/penalties), read 2026-10-17: "after 12 months, another 5% or £300 charge, whichever is greater"
- [GOV.UK penalty points and penalties if you submit your VAT Return late](https://www.gov.uk/guidance/penalty-points-and-penalties-if-you-submit-your-vat-return-late), read 2026-10-17: "When you reach the threshold, you’ll receive a £200 penalty."

## Read in full, publishes no figure

- [GOV.UK Self Assessment tax returns: deadlines](https://www.gov.uk/self-assessment-tax-returns/deadlines), read 2026-09-12: read in full and no accepted figure on the page
- [GOV.UK Self Assessment: if you need to change your return](https://www.gov.uk/self-assessment-tax-returns/corrections), read 2026-09-12: every candidate on the page was refused
- [GOV.UK Self Assessment: claiming a tax refund](https://www.gov.uk/self-assessment-tax-returns/claiming-a-tax-refund), read 2026-09-12: every candidate on the page was refused
- [GOV.UK register for Self Assessment](https://www.gov.uk/register-for-self-assessment), read 2026-09-12: read in full and no accepted figure on the page
- [GOV.UK understand your Self Assessment tax bill: payments on account](https://www.gov.uk/understand-self-assessment-bill/payments-on-account), read 2026-09-12: read in full and no accepted figure on the page
- [GOV.UK VAT Returns: deadlines](https://www.gov.uk/vat-returns/deadlines), read 2026-09-12: every candidate on the page was refused
- [GOV.UK Company Tax Returns](https://www.gov.uk/company-tax-returns), read 2026-09-11: every candidate on the page was refused
- [GOV.UK check when you can expect a reply from HMRC](https://www.gov.uk/guidance/check-when-you-can-expect-a-reply-from-hmrc), read 2026-10-03: read in full and no accepted figure on the page
- [GOV.UK dormant company: dormant for Corporation Tax](https://www.gov.uk/dormant-company/dormant-for-corporation-tax), read 2026-09-11: every candidate on the page was refused
- [GOV.UK pay your Self Assessment tax bill](https://www.gov.uk/pay-self-assessment-tax-bill), read 2026-09-12: read in full and no accepted figure on the page
- [GOV.UK Self Assessment: who must send a tax return](https://www.gov.uk/self-assessment-tax-returns/who-must-send-a-tax-return), read 2026-09-12: read in full and no accepted figure on the page
- [New Jersey Division of Taxation: check your refund status](https://www.nj.gov/treasury/taxation/checkrefundstatus.shtml), read 2026-10-10: every candidate on the page was refused
- [California Franchise Tax Board: amend a return](https://www.ftb.ca.gov/file/after-you-file/amend-a-return/index.html), read 2026-09-19: read in full and no accepted figure on the page

## Methodology

Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 2 of the 15 named sources that could be read published a usable figure; 13 published none and are recorded as not published, never filled in; 1 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in GBP (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 30 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per return type per obligation: the statutory deadline, the penalty at each day and month past it, the amendment window, and HMRC's own current published processing time for that work item read weekly - so the site can say what the wait actually is this week rather than what the guidance says in general, and show how it has moved since January

## Sources

- [GOV.UK Self Assessment tax returns: deadlines](https://www.gov.uk/self-assessment-tax-returns/deadlines) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK Self Assessment tax returns: penalties](https://www.gov.uk/self-assessment-tax-returns/penalties) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK Self Assessment: if you need to change your return](https://www.gov.uk/self-assessment-tax-returns/corrections) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK Self Assessment: claiming a tax refund](https://www.gov.uk/self-assessment-tax-returns/claiming-a-tax-refund) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK register for Self Assessment](https://www.gov.uk/register-for-self-assessment) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK understand your Self Assessment tax bill: payments on account](https://www.gov.uk/understand-self-assessment-bill/payments-on-account) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK penalty points and penalties if you submit your VAT Return late](https://www.gov.uk/guidance/penalty-points-and-penalties-if-you-submit-your-vat-return-late) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK VAT Returns: deadlines](https://www.gov.uk/vat-returns/deadlines) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK Company Tax Returns](https://www.gov.uk/company-tax-returns) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK check when you can expect a reply from HMRC](https://www.gov.uk/guidance/check-when-you-can-expect-a-reply-from-hmrc) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK dormant company: dormant for Corporation Tax](https://www.gov.uk/dormant-company/dormant-for-corporation-tax) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK pay your Self Assessment tax bill](https://www.gov.uk/pay-self-assessment-tax-bill) (the publisher's own terms; quoted for reporting and comment)
- [GOV.UK Self Assessment: who must send a tax return](https://www.gov.uk/self-assessment-tax-returns/who-must-send-a-tax-return) (the publisher's own terms; quoted for reporting and comment)
- [New Jersey Division of Taxation: check your refund status](https://www.nj.gov/treasury/taxation/checkrefundstatus.shtml) (the publisher's own terms; quoted for reporting and comment)
- [California Franchise Tax Board: amend a return](https://www.ftb.ca.gov/file/after-you-file/amend-a-return/index.html) (the publisher's own terms; quoted for reporting and comment)
- [gov.uk](https://www.gov.uk/browse/tax/self-assessment) (the publisher's own terms; quoted for reporting and comment)

## Cite or embed

- The Filing Deadlines Penalties carries 2 published figures read from 2 sources' own pages, from 200 to 300 GBP, read 17 October 2026.
- 2 of the 15 named sources read in full publish a figure; 13 publish none, read 17 October 2026.
- Filing Deadlines Penalties, penalty mtd-late-submission: median 200 GBP across 1 source, read 17 October 2026.
- Filing Deadlines Penalties, penalty self-assessment-12-months-late: median 300 GBP across 1 source, read 17 October 2026.

Cite as: "Taxyearvo Filing Deadlines Penalties", updated 2026-10-18, https://taxyearvo.com/datasets/filing-deadlines-penalties/.

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