IR35 And Off-Payroll Working Appeals

An HMRC letter says you should have been taxed as an employee. Tax, National Insurance, and penalties stretch back years—often to six figures. The numbers are frightening, and the legal framework is notoriously technical.

Start by working out which regime applies to you. Two different sets of rules decide who owes the tax and who can appeal what. Get that wrong and you can spend months arguing the wrong case against the wrong decision.

IR35 In Two Minutes

"IR35" is shorthand for the rules that stop someone working through a limited company from being taxed more favourably than an employee doing the same job. The rules have two parts, and which one applies depends on the end client—not on you.

This is the single most important distinction in an IR35 dispute. Under Chapter 8, the PSC is the taxpayer and the appellant. Under Chapter 10, the worker and the PSC are usually bystanders—the tax bill, and the appeal, belong to someone else in the contractual chain.

Which Regime Applies To You

Chapter 8—Original IR35

Chapter 8 of ITEPA 2003 applies where your services are provided through an intermediary (usually a limited company you control) and the end client is either small, or a non-UK resident client with no UK permanent establishment.

The four conditions in section 49 ITEPA must be met: you personally perform services for the client; the client is not a public authority; the services are provided via the intermediary rather than a direct contract; and the underlying relationship, if stripped of the intermediary, would look like employment.

If Chapter 8 bites, your PSC treats itself as having made a "deemed employment payment" to you at year-end and accounts for PAYE and Class 1 NICs on that deemed payment (section 50 ITEPA). You decide your own status.

Chapter 10—Off-Payroll Working

Chapter 10 (ITEPA ss.61K-61X) applies where the end client is a public authority, or a medium or large private sector business with a UK connection. It has applied to public sector engagements since 6 April 2017 and to medium and large private sector clients since 6 April 2021.

Under Chapter 10, the client—not the PSC—decides employment status. The client issues a Status Determination Statement (SDS) to both the worker and the party it contracts with directly, setting out its conclusion and reasons (section 61NA). If the SDS concludes the engagement is "inside IR35," the "fee payer"—the lowest UK party in the contractual chain above the PSC—must deduct PAYE and NICs as if the worker were its employee (section 61N).

One critical feature: if the client has not taken reasonable care in reaching its conclusion, section 61NA(2) treats the statement as not being an SDS at all. In that case, the client itself becomes the deemed employer and takes on the tax liability.

The Small Company Exemption

Whether a private sector client is "small" is determined by the Companies Act 2006 s.382 thresholds. A company is small if, for its last financial year ending before the tax year, it met at least two of three conditions:

The Companies Act thresholds were increased for accounting periods beginning on or after 6 April 2025 (to £15m turnover and £7.5m balance sheet) by SI 2024/1303. Which thresholds apply to a particular tax year depends on the client's own financial year—check the HMRC Employment Status Manual for the year in question before assuming.

For non-corporate clients (partnerships, LLPs, sole traders), separate tests apply in sections 60E and 60F ITEPA, based on turnover alone.

What HMRC Has Sent You

The paperwork matters. Each document has its own rules, its own deadline, and its own appeal route.

Regulation 80 PAYE determination. HMRC's primary assessment tool. It usually arrives as a letter from HMRC's IR35 or employment status team, with a schedule listing tax years, gross deemed payments, and the PAYE it says you should have operated. Four to six tax years in one envelope is typical. It is issued under regulation 80 of the PAYE Regulations 2003 and says that you (the PSC, or under Chapter 10 the fee payer) should have operated PAYE and didn't. Regulation 80(5) imports the appeal machinery of TMA 1970—so a Reg 80 determination is appealable under section 31 TMA within 30 days.

Section 8 NICs decision. A parallel decision under section 8 of the Social Security Contributions (Transfer of Functions etc.) Act 1999 dealing with the National Insurance side. It runs alongside the Reg 80 determination and has the same 30 days appeal window. Appeal both—NICs liability is usually larger than the PAYE liability once employer's contributions are added.

Section 9A enquiry or closure notice. If HMRC opens an enquiry into your PSC's Corporation Tax return under section 9A TMA, the enquiry typically runs for years. It ends with a closure notice under section 28A TMA, which you can appeal within 30 days. See our guide to HMRC enquiries and closure notices for the mechanics.

Schedule 24 penalty. An inaccuracy penalty under Schedule 24 FA 2007, charging 30% (careless), 70% (deliberate) or 100% (deliberate and concealed) of the underpaid tax. Penalties are separately appealable from the underlying tax, and each penalty notice has its own 30 days clock.

Discovery assessment. For out-of-time years, HMRC may assess under section 29 TMA. Discovery assessments have their own validity hurdles—see our discovery assessments guide for the gateway conditions and how to challenge them.

Read your letter carefully. If you have several documents, calendar every deadline separately. Missing one by a day may leave you needing to argue for a late appeal under the Martland test.

Who Can Appeal What

The rule is straightforward in principle: only the person assessed can appeal the assessment. The complications come from Chapter 10, where the worker and the PSC are often not the assessed party.

If you are a PSC director in a Chapter 8 case, you (via the PSC) are the taxpayer. You have full appeal rights against the Reg 80 determination, the s.8 NICs decision, the closure notice on your CT return, and any Schedule 24 penalty. File within 30 days of each decision.

If you are a fee payer in a Chapter 10 case (an agency or the client itself), you are the taxpayer for the deemed direct payment. You have full appeal rights against the Reg 80 determination and any penalty assessed on you. You can defend by arguing the underlying engagement was outside IR35, or that you were not in fact the fee payer (for example, because the client failed to take reasonable care and became the deemed employer under s.61NA(2)).

If you are the end client, you may be the deemed employer if you failed to take reasonable care in reaching your SDS conclusion, or if you failed to respond to a worker's representations within 45 days under section 61T ITEPA. Again, you are the taxpayer and have standard appeal rights.

If you are the worker or PSC under Chapter 10, this is where the trap lies. You are not the assessed party, so you cannot appeal the Reg 80 determination served on the fee payer. Your SDS itself is not directly appealable to HMRC or the tribunal. What you can do is:

1. Use the client-led disagreement process under s.61T. Submit written representations to the client, before the final chain payment, that the SDS is wrong. The client must respond within 45 days, either confirming the SDS with reasons or issuing a new one. If the client does not respond in time, the client becomes the deemed employer.

2. Claim double-charge relief under s.61W if HMRC has assessed the fee payer and you accounted for tax personally on the same income. If HMRC rejects the claim, that rejection is appealable.

3. Watch for an assessment against you or your PSC. If HMRC uses the information-failure or fraud provisions (s.61U / s.61V) to transfer liability to the PSC, standard appeal rights then apply.

Commercial routes remain—refusing further work on the engagement, renegotiating the contract, or taking civil action against an agency or client that has wrongly deducted tax. But these sit outside the tax tribunal's jurisdiction.

The Substantive Test: Ready Mixed Concrete After PGMOL

The tribunal's job is to decide whether a "hypothetical contract" between you and the end client—stripping out the intermediary—would be a contract of employment. The test comes from Ready Mixed Concrete (South East) Ltd v Minister of Pensions and National Insurance [1968] 2 QB 497, which remains authoritative after more than half a century. MacKenna J's three conditions were quoted verbatim by the Supreme Court in PGMOL at paragraph 37:

"(i) The servant agrees that, in consideration of a wage or other remuneration, he will provide his own work and skill in the performance of some service for his master. (ii) He agrees, expressly or impliedly, that in the performance of that service he will be subject to the other's control in a sufficient degree to make that other master. (iii) The other provisions of the contract are consistent with its being a contract of service."

Those three conditions are usually labelled personal service (or "mutuality of obligation"), control, and the third-stage assessment. The Supreme Court decision in HMRC v Professional Game Match Officials Ltd [2024] UKSC 29 is now the modern authority on how to apply each limb—see the dedicated PGMOL case analysis for the three doctrinal shifts it made. What matters for your appeal is the framework.

Personal Service

The worker must be obliged to provide the service personally. A genuine, unfettered right of substitution breaks this—the worker is not providing personal service if they can send someone else.

In Express & Echo Publications Ltd v Tanton [1999] EWCA Civ 949, a courier's contract required him to find a substitute at his own cost if unavailable. The Court of Appeal held this was inconsistent with a contract of employment: personal service is an irreducible feature of employment.

But substitution clauses are rarely unfettered in practice. In Dragonfly Consultancy Ltd v HMRC [2008] EWHC 2113 (Ch), a tester's contract required the agency's consent to any substitute. Henderson J held this was not enough—the client wanted this worker, not any competent tester. A requirement to obtain consent, or to propose substitutes with equivalent skills, usually fails to displace personal service.

The Supreme Court in Pimlico Plumbers Ltd v Smith [2018] UKSC 29—an employment-law case, but frequently cited in IR35—confirmed that a limited or contingent right to substitute does not negate personal service where the "dominant feature" of the contract is personal performance.

Mutuality Of Obligation

Pre-PGMOL, "mutuality of obligation" was often described as requiring the employer to offer work and the worker to accept it—creating a live battleground in contractor cases where engagements were project-by-project. PGMOL reframed this at paragraph 40:

"It is an essential element of a contract of employment that the employee provides his or her personal service for payment by the employer. This requirement has been variously described, for example as 'the wage-work bargain' … However, in this case, as in many others, it has been adopted as the label for the first pre-requisite of any contract of employment and, with some reluctance, I shall also use it."

The Supreme Court went on, at paragraph 41, to stress that this minimum is not itself decisive:

"This requirement of payment for personal service cannot, however, itself establish that the contract in question is a contract of employment. It is likewise an essential element of contracts for services whereby independent contractors agree to provide their personal services for payment… Beyond simply establishing the existence of a contract, it has been said to locate the contract in 'the employment field'"

The practical effect: a bare "wage-work bargain" is now satisfied whenever the worker is paid to turn up. Disputes about whether the engager "has to offer more work" once a project ends go to the weighing exercise at stage three—not to whether the first limb is met.

Control

Control is the second limb, and PGMOL reshaped it. The Court of Appeal's formulation—that PGMOL's rules about referees' conduct before and after the match gave PGMOL a "framework of control" over them—was upheld by the Supreme Court at paragraph 88:

"[T]he Court of Appeal was correct to say that the combination of contractual obligations imposed on referees as to their conduct generally during an engagement from the time that a match was accepted to the submission of the match report, and as to their conduct during a match, was capable of giving PGMOL a framework of control sufficient for the purposes of meeting the control test for employment purposes."

The significance for IR35 is that "control" does not require a continuous right to step in and give instructions. Contractual obligations about conduct, standards, reporting, or disciplinary consequences—backed by enforceable sanctions—can suffice. A highly skilled contractor whose day-to-day methods are entirely autonomous can still be within a framework of control if, for example, the client can remove them from the engagement for non-compliance, audit their output, or direct what they do next.

The Third Stage

If the first two limbs are satisfied, the tribunal weighs the contract as a whole. The Court of Appeal in HMRC v Atholl House Productions Ltd [2022] EWCA Civ 501 set out what this involves. At paragraphs 122 to 124, Sir David Richards held that mutuality of obligation and control are "necessary pre-conditions" but not in themselves sufficient; third-stage factors must be those "known, or could reasonably be supposed to be known, to both parties" at the date of contracting; and where "the person providing the services is known to carry on a business, profession or vocation on their own account as a self-employed person, it would in my judgment be myopic to ignore it."

The portfolio career principle has older roots in Hall (HM Inspector of Taxes) v Lorimer [1993] EWCA Civ 25, cited approvingly by the Supreme Court in PGMOL at paragraph 30. A freelance vision mixer working across many clients, with his own equipment and commercial risk, was self-employed—not because any one engagement was particularly different from a day's paid work, but because the totality of his working pattern pointed to a business.

The third stage is fact-heavy. It is also where most IR35 cases are decided—and where tribunals most often disagree with each other.

The Hypothetical Contract

You cannot appeal the actual contracts between you, the agency, and the client. What the tribunal is constructing is a hypothetical direct contract—the contract that would have existed had the intermediary been removed.

Two propositions from the case law matter most. First, the hypothetical contract must reflect commercial reality. In Usetech Ltd v Young [2004] EWHC 2248 (Ch), Park J refused to import standard-form substitution clauses from an agency contract into the hypothetical direct contract because the reality was that the client wanted the specific worker—who had been on site for 37.5 hours a week across a 17-month engagement. Mutuality could be inferred from the actual pattern of work, not just the contract documents.

Second, what matters is what both sides would have agreed to. In Dragonfly, the limited substitution clause in the agency contract was discounted because the client had made clear it wanted the specific tester. You cannot construct the hypothetical contract by treating an agency standard-form as the final word.

For your appeal, this means evidence matters. What actually happened on the ground? What did the client say about who would do the work? How long did you actually work? Were your hours, deliverables, or performance standards tracked? Witness evidence from the client's manager is often decisive—but unrepresented appellants rarely have the resources to compel it. Plan witness evidence early. See our guide to preparing for your tribunal hearing.

Filing The Appeal

The mechanics are the same as any other direct tax appeal—see our guide to appealing to the tax tribunal for the full procedure.

1. Appeal in writing to HMRC within 30 days of the decision. Your notice must state grounds. For IR35 cases, grounds typically engage the Ready Mixed Concrete three-stage test and, for Chapter 10, the validity of the SDS or the reasonable-care question under s.61NA(2). Our guide to writing grounds of appeal covers the structure.

2. Decide whether to accept a statutory review. HMRC may offer one. A different officer reviews the decision within 45 days and either upholds, varies, or cancels it. For the general framework, see our HMRC internal review guide. Statutory review is free and does not close off the tribunal. But for genuinely complex IR35 cases, review is less likely to cancel the decision than in simpler areas—HMRC review officers often defer to compliance teams on fact-heavy status questions. Review is most useful where HMRC has clearly misapplied the law on a discrete point.

3. Notify the appeal to the tribunal within 30 days of receiving the review conclusion (or at any time if you skipped review). There is no fee. File online or by paper form T240. Cases typically take typically 6-12 months to decision—but IR35 cases often take considerably longer, because they are fact-heavy and witness-dependent.

4. Apply to postpone the disputed tax under section 55 TMA. This is essential. IR35 Reg 80 determinations are routinely six or seven figures. Without postponement, the tax is payable immediately and interest accrues on the full amount throughout the appeal. See our guide to postponing payment during appeal for how to apply and what HMRC tests.

Track Allocation And Costs Risk

Once your appeal reaches the tribunal, it will be allocated to one of four case categories: Default Paper, Basic, Standard, or Complex. IR35 cases are almost always Standard or Complex, because the disputed amounts are large and the legal issues are fact-heavy.

The key risk is Complex track. In Complex cases, the tribunal can order costs in line with the general civil costs regime under Rule 10(1)(c) of the Tribunal Procedure Rules. That means if you lose, HMRC can apply for its legal costs—potentially tens or hundreds of thousands of pounds.

You can opt out of costs by writing to the tribunal within 28 days of being told your case is Complex. Once you opt out, costs shifting no longer applies. Most unrepresented appellants opt out, because the downside risk of a cost order generally outweighs the upside of potentially recovering costs if they win. For more on the categories and costs risk, see our tribunal tracks and costs guide.

Outside Complex track, costs can still be ordered under Rule 10(1)(b) if a party acts unreasonably—for example, by failing to engage, ignoring directions, or withdrawing at the last minute. This applies in Standard and Basic cases too, though the threshold for "unreasonable conduct" is relatively high.

Penalties

Almost every IR35 adjustment brings a Schedule 24 FA 2007 penalty. The penalty is a percentage of "potential lost revenue"—essentially, the tax under-assessed.

Three behaviour categories determine the starting rate:

HMRC does not need to prove deliberate behaviour in every IR35 case—careless is its default starting point when a PSC filed returns on the basis of an outside-IR35 view that the tribunal later rejects. But deliberate behaviour findings are not unheard of, particularly where the PSC has ignored professional advice or used an avoidance scheme. On what "deliberate" means as a matter of law, see our analysis of Tooth v HMRC.

The defence is that you took reasonable care. This is fact-specific. Did you seek professional advice before concluding you were outside IR35? Did the advice reflect the actual facts of the engagement, not a sanitised version? Did you revisit status when the engagement pattern changed?

Written contemporaneous advice, and a record of what you told the adviser, is usually decisive. Running a CEST result that came back "outside IR35" or "unable to determine" is not itself a complete defence—HMRC commits to standing by CEST results only where the information input "remains accurate and in accordance with our guidance." The real question is whether the underlying facts, if fully put to HMRC, would have produced that answer.

If you win the tax but lose the penalty argument—or vice versa—you appeal each separately. See our general penalties guide for how the regime operates end to end.

The Long Game: FTT Is Rarely The End

A distinctive feature of IR35 litigation is that First-tier Tribunal decisions are routinely remitted or reversed at the Upper Tribunal. Three recent examples illustrate the pattern.

In RALC Consulting Ltd v HMRC [2019] UKFTT 703 (TC), the FTT allowed a contractor's appeal—finding that the hypothetical contract was not one of employment. Five years later, in HMRC v RALC Consulting Ltd [2024] UKUT 99 (TCC), the Upper Tribunal set the decision aside for error of law: the FTT had analysed the actual agency contracts rather than the hypothetical direct contracts with the end client. The case was remitted.

In Basic Broadcasting Ltd v HMRC [2022] UKFTT 48 (TC), Adrian Chiles won at FTT—the tribunal found mutuality and control, but decided the third-stage weighing favoured self-employment. In HMRC v Basic Broadcasting Ltd [2024] UKUT 165 (TCC), the UT held that the FTT had asked itself the wrong question at stage three—treating "business on own account" as the test itself rather than as one factor in the third-stage weighing—and set the decision aside.

Atholl House—Kaye Adams's case—went from FTT to UT to Court of Appeal and back to FTT. The Court of Appeal remitted it on the framing of the third stage. On re-hearing ([2024] UKFTT 37 (TC)), the FTT allowed Ms Adams's appeal again—her portfolio career outweighed the factors pointing to employment.

PGMOL itself is the most complete arc. FTT win in 2018, UT win in 2020, Court of Appeal loss in 2021, Supreme Court loss in September 2024, and FTT win again on remittal in [2026] UKFTT 654 (TC) on 1 May 2026—seven years and five hearings to reach a stage-three answer. The cumulative procedural cost is part of the dispute's reality, not an aberration.

The implication for an unrepresented appellant is practical. A win at FTT is not the end, and nor is a loss. HMRC appeals adverse FTT decisions often, and taxpayers win on points of law at UT more frequently than they win on the facts at FTT. Budget accordingly. For what happens next after the FTT decision, see our after your tax tribunal decision guide; for the point-of-law threshold and the process, see our upper tribunal appeal guide.

Onward appeal is on points of law only—perversity, misapplication of authority, or procedural error. You cannot re-run the facts. That makes written reasons and a careful tribunal record at FTT unusually important: if you lose at FTT, the UT can only help you on what the FTT actually found.

What To Do Now

1. Identify the regime. Is the client small, overseas, or an individual outside business? Chapter 8. Medium, large, or public? Chapter 10. This determines who is the taxpayer.

2. Read every document HMRC has sent. Calendar every 30 days deadline separately—Reg 80, s.8 NICs, closure notice, penalty. Missing one forfeits the appeal on that element. If you're already past 30 days, a late-appeal application under s.49 TMA is still possible but gets harder the longer you leave it—see late appeal to the tax tribunal.

3. File protective appeals first. A short written appeal stating "grounds: the engagements were not within IR35; full grounds to follow" protects your deadline while you develop your case.

4. Apply to postpone the disputed tax under s.55 TMA. If HMRC rejects, you can refer the question to the tribunal.

5. Gather evidence. Contracts, emails with the client, timesheets, substitution examples, a list of your other clients, your own equipment records, invoices, CEST results if you ran any. For Chapter 10 workers, preserve any representations you made under s.61T and the client's response.

6. Consider professional advice early. IR35 cases are legally technical, fact-heavy, and often seven figures. Even where full representation is unaffordable, a tax adviser's opinion on status can strengthen a reasonable-care defence against penalties.

7. Decide on Complex track opt-out within 28 days of the tribunal telling you the case is Complex. Unless you have compelling reasons, opt out to cap your costs exposure.

8. Plan for the long game. Assume that whichever party loses at FTT will consider an Upper Tribunal appeal. Keep good records, preserve witness evidence, and aim for a clean, written judgment.

Key Legislation And Resources

Legislation

• Chapter 8, Part 2 ITEPA 2003—original IR35 (PSC decides status)
• Section 49, ITEPA 2003—Chapter 8 scope conditions
• Section 50, ITEPA 2003—deemed employment payment
• Section 60A, ITEPA 2003—small company test
• Chapter 10, Part 2 ITEPA 2003—off-payroll working (client decides)
• Section 61M, ITEPA 2003—Chapter 10 scope
• Section 61N, ITEPA 2003—fee payer deemed direct payment
• Section 61NA, ITEPA 2003—Status Determination Statement and reasonable care
• Section 61T, ITEPA 2003—client-led disagreement process
• Section 61W, ITEPA 2003—double-charge prevention
• Companies Act 2006 s.382—small company thresholds
• Regulation 80, PAYE Regulations 2003—determination of unpaid tax
• SI 2000/727—NICs (Intermediaries) Regulations
• Section 8, Social Security Contributions (Transfer of Functions etc.) Act 1999—NICs decisions
• Schedule 24, FA 2007—inaccuracy penalties
• Section 55, TMA 1970—postponement of tax pending appeal

Key Cases

• HMRC v Professional Game Match Officials Ltd [2024] UKSC 29—modern authoritative framework on MOO and control; "framework of control" endorsed
• Professional Game Match Officials Ltd v HMRC [2026] UKFTT 654 (TC)—remitted FTT decision (1 May 2026); appeal allowed at stage three; worked example of post-PGMOL stage-three weighing
• Ready Mixed Concrete (South East) Ltd v Minister of Pensions and National Insurance [1968] 2 QB 497—foundational three-stage test (quoted in PGMOL at para 37)
• Hall (HM Inspector of Taxes) v Lorimer [1993] EWCA Civ 25—portfolio career / in-business-on-own-account principle (cited in PGMOL at para 30)
• HMRC v Atholl House Productions Ltd [2022] EWCA Civ 501—third-stage framework; portfolio career weight
• Atholl House Productions Ltd v HMRC [2024] UKFTT 37 (TC)—remitted FTT decision; Kaye Adams self-employed
• Kickabout Productions Ltd v HMRC [2022] EWCA Civ 502—Paul Hawksbee found within IR35; 222-programme obligation
• Basic Broadcasting Ltd v HMRC [2022] UKFTT 48 (TC)—Adrian Chiles initial FTT win
• HMRC v Basic Broadcasting Ltd [2024] UKUT 165 (TCC)—UT set aside the FTT decision for analytical error
• RALC Consulting Ltd v HMRC [2019] UKFTT 703 (TC)—contractor win at FTT
• HMRC v RALC Consulting Ltd [2024] UKUT 99 (TCC)—UT remitted for error on hypothetical contract construction
• Gary Lineker & Anor t/a Gary Lineker Media v HMRC [2023] UKFTT 340 (TC)—partnership direct-contract escape from s.49(1)(b)
• Dragonfly Consultancy Ltd v HMRC [2008] EWHC 2113 (Ch)—limited substitution insufficient
• Usetech Ltd v Young [2004] EWHC 2248 (Ch)—hypothetical contract must be commercially realistic
• Express & Echo Publications Ltd v Tanton [1999] EWCA Civ 949—unfettered substitution right negates employment
• Pimlico Plumbers Ltd v Smith [2018] UKSC 29—contingent substitution consistent with personal service
• Autoclenz Ltd v Belcher [2011] UKSC 41—reality over written labels; purposive construction
• Jensal Software Ltd v HMRC [2018] UKFTT 271 (TC)—seven-figure assessment cancelled on third-stage weighing
• Christianuyi Ltd v HMRC [2019] EWCA Civ 474—Managed Service Companies regime (Chapter 9, distinct from IR35)

GOV.UK Guidance

• Check Employment Status for Tax (CEST)—HMRC's online status tool
• Off-payroll working for clients—Chapter 10 guidance for clients
• Off-payroll working for intermediaries—worker/PSC guidance
• HMRC Employment Status Manual—HMRC's detailed position on control, MOO, personal service, and Chapter 10 fee-payer liability

On This Site

• How to appeal to the tax tribunal—step-by-step filing guide
• HMRC internal review—the free review step before the tribunal
• Postponing payment during appeal—s.55 TMA mechanics
• Tribunal tracks and costs—Complex track costs risk and opt-out
• HMRC penalties explained—penalty types and calculations
• Writing grounds of appeal—structuring your case
• HMRC enquiries and closure notices—s.9A enquiry mechanics
• Discovery assessments—s.29 TMA out-of-time assessments
• Late appeal to the tax tribunal—Martland three-stage test if you missed the deadline
• After your tax tribunal decision—written reasons, set-aside, and onward appeal
• Upper tribunal appeal—point-of-law threshold and UT procedure
• Preparing for your tax tribunal hearing—witness statements, bundles, and hearing day
• Tooth v HMRC—the meaning of "deliberate" for Schedule 24
• Settling your tax tribunal case—s.54 agreements and ADR, common in IR35 disputes
• Interest on unpaid tax—how the interest element of a multi-year determination accrues
• Tax dispute timeline—where an IR35 dispute sits in the broader HMRC journey

This article is for informational purposes only and does not constitute legal or tax advice. For advice specific to your situation, consult a qualified tax adviser, accountant, or solicitor.