Schedule 36 paragraph 50: the tax-related penalty above the £300 + £60-a-day stack (UK 2026)

When HMRC issues a Schedule 36 FA 2008 information notice during a Stamp Duty Land Tax (SDLT) compliance check, the headline civil penalties for ignoring it are familiar: an initial £300 under paragraph 39, then up to £60 a day under paragraph 40, with a tribunal-approved upper tier of up to £1,000 a day under paragraph 49A. The sister guide on the £300 / £60 / £1,000 daily penalty stack walks that day-rate regime in detail.

What the day-rate guide deliberately defers is the layer that sits above the daily caps: the tax-related penalty under paragraph 50 of Schedule 36. Unlike the £300 + £60/day stack, the paragraph 50 penalty has no statutory cap — its amount is set by the Upper Tribunal having regard to the tax at stake. For a Stamp Duty Land Tax (SDLT) compliance check where the underlying point is, say, a £25,000 additional-property surcharge or a £100,000 non-resident-plus-additional layer, that mechanism is more material than the day-rate cap.

This piece walks the statute, the procedural triggers, the interaction with the day-rate civil regime and the separate criminal offences in paragraphs 53–55, and a worked SDLT example. It is a factual explainer of how the regime is structured, not advice on what to do in a live enquiry — for that, instruct a tax solicitor or chartered tax adviser.

Where paragraph 50 sits in Schedule 36

Schedule 36 Part 7 is built in layers. The civil daily-cap regime in paragraphs 39, 40 and 49A is the first three steps. Paragraph 50 is the fourth.

The paragraph numbers matter because the criminal route (paras 53–55) is structurally separate from the tax-related civil penalty (paras 50–51). They can in principle both arise on the same facts, with the safeguard in paragraph 52 that a person cannot be hit with a Schedule 36 civil penalty for the same conduct on which they have been criminally convicted.

The five preconditions for a paragraph 50 penalty

Paragraph 50(1) sets out the gate that HMRC has to clear before the Upper Tribunal can impose the tax-related penalty. All five conditions have to be met:

1. The person is already liable to a paragraph 39 penalty. The £300 initial penalty must have crystallised — the paragraph 50 route is not available cold.
2. The failure or obstruction has continued after the paragraph 39 penalty was imposed. The paragraph 50 penalty is, in substance, an escalation for ongoing non-compliance, not a substitute for the day-rate regime.
3. An HMRC officer has reason to believe that, as a result of the failure or obstruction, the tax the person has paid or is likely to pay is significantly less than it would otherwise have been. The "significantly less" test is the tax-geared anchor of the penalty.
4. HMRC applies to the Upper Tribunal for the additional penalty within the 12-month application window. Paragraph 50(7) defines the "relevant date" from which the 12 months runs: where the underlying information notice was appealable, the latest of (i) the date the person became liable under paragraph 39, (ii) the end of the appeal-notification period, and (iii) the determination or withdrawal of any appeal. In any other case, the date of paragraph 39 liability.
5. The Upper Tribunal decides that it is appropriate for the additional penalty to be imposed.

If any one of those conditions is missing, the paragraph 50 route closes. In practice the second and third conditions — continuing failure plus an HMRC belief that the tax at stake is significantly understated — are the live arguments at tribunal.

How the Upper Tribunal decides the amount

Paragraph 50(2) says the person "is liable to a penalty of an amount decided by the Upper Tribunal". The only statutory steer on quantum is paragraph 50(3):

In deciding the amount of the penalty, the Upper Tribunal must have regard to the amount of tax which has not been, or is not likely to be, paid by the person.

That is the entirety of the statutory steer. There is no maximum, no percentage-of-tax cap, and no scale of mitigation. The Tribunal's discretion is wide but is anchored on tax-at-stake — making the penalty, in practice, tax-geared rather than process-geared.

Two further structural features:

• Procedural standalone. Paragraph 51 requires the penalty to be paid within 30 days of HMRC's notification, and treats it as enforceable as if it were income tax assessed and due. There is no separate "appeal of the amount" route built into paragraph 50 — the appeal point is the Upper Tribunal hearing itself.
• Stackable with the day-rate penalties. Paragraph 50(5) is explicit: the penalty is in addition to anything under paragraphs 39 or 40. Paragraph 50(6) carves the penalty out of the multiple-penalties counting rules in TMA 1970 s.97A and the Schedule 24 FA 2007 / Schedule 41 FA 2008 interaction provisions — so it does not "use up" or "consume" any other penalty allowance.

The criminal offences in paragraphs 53–55

Paragraph 50 is the civil escalation. The criminal layer sits separately in paragraphs 53–55 and is narrower, but with much heavier punishment.

Paragraph 53 creates an offence where (a) a person is required to produce a document by an information notice, (b) the tribunal approved the giving of the notice under paragraph 3 (taxpayer notice) or paragraph 5 (third-party notice), and (c) the person conceals, destroys or disposes of (or arranges for the concealment, destruction or disposal of) the document. Paragraph 53(2)–(3) exempt acts done after the document has already been produced, subject to a 6-month preservation window where HMRC has notified the person in writing that the document must remain available.

Paragraph 54 extends the offence to anticipatory concealment: where HMRC has informed the person in writing that a document is, or is likely to be, the subject of a notice and that HMRC intends to seek tribunal approval, concealing or destroying that document is itself an offence — even before the notice is actually issued. The exemption clock is 6 months from the last written warning, or until an information notice is actually given.

Paragraph 55 sets the punishment:

A person who is guilty of an offence under this Part of this Schedule is liable—

(a) on summary conviction, to a fine not exceeding the statutory maximum, and

(b) on conviction on indictment, to imprisonment for a term not exceeding 2 years or to a fine, or both.

The threshold trigger for the criminal route — tribunal approval of the underlying information notice — is what keeps it narrow. The bulk of Schedule 36 information notices issued to SDLT taxpayers do not require tribunal approval (paragraph 3 approval is only needed where the taxpayer notice is not preceded by an opportunity to comply, or where HMRC chooses to seek approval to lock in the criminal sanction). Once tribunal approval is on file, the paragraph 53/54 hook engages and document destruction becomes a separate criminal exposure.

Worked SDLT example

A non-resident company has bought a £1.4 million London property. An HMRC officer opens a Schedule 36 information notice against the conveyancer (third-party notice under paragraph 2, tribunal-approved under paragraph 3) seeking the apportionment workings between the dwelling and the non-residential element of the title — a multiple-dwellings / mixed-use point worth a six-figure tax adjustment if HMRC's reading prevails.

Suppose the company misses the deadline:

The day-rate stack at the £60 cap totals roughly £21,900 over a full year. Against that, the paragraph 50 ceiling is the tax-at-stake itself — if HMRC's reading of the apportionment point is right, that could be tens or hundreds of thousands of pounds. The shape of the regime, in other words, is that the dominant exposure is not the day-rate stack — it is paragraph 50, once HMRC has the procedural foundation in place.

Why this matters in SDLT enquiries specifically

Of the 848,775 residential transactions registered with HM Land Registry across England and Wales in 2025 (Land Registry Price Paid, queried 28 May 2026), 760,361 sat above the £125,000 standard SDLT nil-rate threshold, 488,720 above £250,000, 33,161 above £925,000, and 11,208 above £1.5 million. Every one of those returns falls inside the population that HMRC can in principle compliance-check under FA 2003 Schedule 10, and every one of those compliance checks can be supported by a Schedule 36 information notice.

The compliance-check letters are routine — see the SDLT enquiry windows and HMRC compliance check letters guide for the procedural timeline. What the SDLT-specific case-law thread shows (and the Tooth v HMRC SDLT discovery-window piece explores in detail) is that the tax adjustments in dispute can be substantial. A £30,000 additional-property surcharge under the higher-rate refund process, a £28,000 non-resident surcharge at a £1.4 million property, or a six-figure non-dwellings apportionment all sit comfortably in the range where the paragraph 50 tax-related penalty becomes the real risk on the table, not the £300 + £60/day stack.

A few procedural observations follow from the structure:

1. The 12-month application window matters. Paragraph 50(1)(d) requires HMRC to apply to the Upper Tribunal within 12 months of the paragraph 50(7) "relevant date". A taxpayer who appeals the underlying information notice can extend that relevant date (paragraph 50(7)(a)(iii) — "the date on which the appeal is determined or withdrawn") — but the appeal then has to be substantive, not a delay tactic, or the appeal itself can become evidence of continuing obstruction.

1. Tribunal approval is the criminal hook. A taxpayer notice issued under paragraph 1 with no tribunal step does not engage paragraphs 53 or 54. The moment HMRC seeks paragraph 3 approval — typically when the officer wants to lock in the criminal hook, or when the notice is being challenged — the criminal route becomes available alongside the civil one. The Schedule 36 paragraph 2 third-party notice guide covers when tribunal approval is in play.

1. Paragraph 52 prevents double jeopardy. A person cannot be liable to a Schedule 36 civil penalty for conduct in respect of which they have been criminally convicted. That makes the choice of route (civil paragraphs 39/40/49A/50 vs criminal paragraphs 53/54) consequential for HMRC, not a free additive on top.

Interaction with the Schedule 24 FA 2007 inaccuracy regime

The paragraph 50 tax-related penalty is conceptually distinct from the Schedule 24 FA 2007 inaccuracy penalty regime that often runs in parallel. Schedule 24 penalises careless or deliberate inaccuracies on the return itself — see the SDLT discovery / carelessness / deliberate evidence-bar piece and the parallel inaccuracy-penalty thread for the substantive Schedule 24 mechanics.

The two regimes can coexist on the same enquiry: a taxpayer who files a careless return and obstructs the subsequent Schedule 36 information notice faces a Schedule 24 inaccuracy penalty and a Schedule 36 civil-penalty stack (including, potentially, a paragraph 50 tax-related penalty). Paragraph 50(6) is the dovetail provision — it carves paragraph 50 out of the Schedule 24 paragraph 12(2) "interaction with other penalties" counting rule, meaning the paragraph 50 penalty does not crowd out a Schedule 24 inaccuracy penalty on the same facts.

Defence and mitigation routes

The statute itself provides limited defences. The principal procedural routes:

• Argue HMRC has not cleared paragraph 50(1)(c). "Reason to believe" tax is "significantly less" is a low bar but not no bar — case-law on what "significantly less" requires in this context is sparse, leaving room to challenge the foundation.
• Argue the failure has not "continued" in the sense required by paragraph 50(1)(b). Sporadic partial responses raise factual questions about when, if at all, the failure ended.
• Engage the Article 6 ECHR criminal-character test if the paragraph 50 penalty is being escalated in a context where the Engel and Jussila criteria might bring fair-hearing protections into play — though paragraph 50 is structurally civil, the size of the penalty and its punitive character can engage Article 6 in the same way Schedule 24 inaccuracy penalties have.
• Time-bar argument under paragraph 50(1)(d) where HMRC has slipped past the 12-month window from the paragraph 50(7) relevant date.

All of these are tribunal arguments, run with specialist representation.

How this changes the calculus

The visible cost of a Schedule 36 non-compliance is the day-rate civil stack and the inconvenience of HMRC continuing the enquiry. The hidden cost is paragraph 50: the tax-geared, Upper-Tribunal-set, statutorily-uncapped penalty that crystallises if HMRC believes the obstruction is materially understating tax. For an SDLT compliance check on a £1m+ transaction with an apportionment, additional-property or non-resident-surcharge dispute, that is structurally the larger exposure.

The structural takeaway is that the £300 + £60/day headline is the floor, not the ceiling, of Schedule 36 risk — and that the tax-related penalty under paragraph 50 is calibrated specifically to make non-compliance unattractive where real tax is at stake.

For the cost side of the underlying SDLT itself, the all-four-regimes stamp duty calculator computes SDLT, LBTT, LTT and Northern Ireland charges with all reliefs and surcharges, and the SDLT vs LBTT vs LTT comparison guide walks the cross-regime differences. The postcode tool shows the all-in monthly cost of a specific property at the current Bank of England quoted rate. None of those tools substitute for a tax solicitor's advice on a live HMRC enquiry — they exist to make the underlying cost of an SDLT-bearing transaction transparent.

This is a factual explainer of how the Schedule 36 paragraph 50 tax-related penalty regime works. It is general information about UK tax procedure, not legal or tax advice. Speak to a qualified tax adviser or solicitor before acting on any HMRC information notice, compliance-check letter, or enforcement step.