Understanding Current Corporation Tax Rates and Marginal Relief in the UK

HMRC Penalties & Compliance — What UK Businesses Need to Know Right Now

By MA & CO Accountants — Updated: 2 February 2026

Summary: In the past week HMRC published and updated guidance and internal notices affecting penalties and compliance processes. These updates include changes to penalty guidance, internal classification notes, and reminders about upcoming penalty reforms and deadlines. If you run a business, act as an agent for clients, or are responsible for filings, read the practical checklist below and contact MA & CO if you need hands-on support to reduce exposure to fines and protect cashflow.

Why this matters

HMRC penalty regimes — covering late submission, late payment, failure to notify and accuracy-related penalties — are complex and continually evolving. Small changes in guidance or when HMRC applies discretion can materially affect cash flow, reputations, and the administrative burden on businesses and their agents.

This article summarises the latest public updates from GOV.UK / HMRC in the past week, explains practical impacts, and provides a step-by-step action plan tailored for the MA & CO client base (SMEs, directors, landlords and contractors).

Latest updates (past week) — key items

• HMRC internal manual update (CH300200) — 13 January 2026 / recent refreshes visible this week: HMRC clarified aspects of penalties that are treated as ‘criminal’ for ECHR purposes and updated guidance on how certain penalties are classified and handled in internal compliance workflows. This may affect procedural safeguards and appeal routes for taxpayers. (See: HMRC Compliance Handbook CH300200).
• Ongoing penalty reform & interest harmonisation reminders: HMRC and GOV.UK continue to publish guidance tied to penalty reform introduced in recent years (including late-submission penalty frameworks and interest harmonisation). Several guidance pages were reaffirmed this week, with reminders about thresholds and upcoming effective dates for higher-income/turnover cohorts (e.g., thresholds applying from tax years starting April 2026). (See: GOV.UK guidance on interest harmonisation and penalties for late submission).
• Self Assessment and late filing notices: GOV.UK notices remain prominent as the filing season continues; HMRC emphasised that the standard fixed £100 penalty for late Self Assessment returns, and subsequent daily penalties, remain in force — HMRC is actively communicating to taxpayers approaching deadlines.
• Legislative/regulatory references: Recent statutory instruments and regulations related to "Penalties for Failure to Pay Tax" remain accessible; practitioners should watch these instruments for operational detail affecting how HMRC issues assessments and imposes secondary penalties.

What changed in practice (practical read)

The past week’s updates are largely clarifications and internal guidance refreshes rather than brand-new headline taxes. But they matter because:

• Classification changes in internal manuals can change how HMRC treats procedural rights and appeals, potentially narrowing or clarifying the window to challenge a penalty.
• Ongoing penalty reform communications mean HMRC continues to align late-payment interest and submission penalties across regimes — this keeps the administrative focus on accurate, timely filings and the correct treatment of “reasonable excuse” claims.
• HMRC’s continued public reminders about Self Assessment filing behaviour indicate increased monitoring and enforcement activity around deadlines — expect more automated penalty point activity and collection actions for persistent late filers.

Who is most affected

• Small and medium businesses who file VAT, corporation tax and PAYE returns and who are close to the new thresholds for stricter treatment (income above specified thresholds tied to upcoming MTD/penalty rules).
• Self-employed individuals and landlords filing Self Assessment returns (the normal fixed and daily penalties remain an immediate risk if deadlines are missed).
• Agents and accountants who act for multiple clients — changes to internal guidance affect how HMRC communicates and what evidence it expects when agents make reasonable-excuse claims on clients’ behalf.
• Taxpayers with complex disclosures or offshore exposure — recent legislative instruments and penalties frameworks continue to tighten the consequences for late or incorrect disclosures.

Immediate compliance checklist — what MA & CO clients should do this week

Use this checklist to reduce immediate risk of penalties. If you want MA & CO to run these checks for you, see the contact CTA below.

1. Confirm all upcoming filing & payment deadlines — make a list for the next 90 days (VAT, PAYE, Corporation Tax, Self Assessment). Mark returns due, payments due dates, and who is responsible internally.
2. Check predisposition to penalty points — for VAT (MTD) and other regimes using a point-based penalty system, check clients who have recent late submissions. Where penalty points are accruing, plan corrective measures (catch-up filings, appoint an agent, contact HMRC early).
3. Collect evidence for ‘reasonable excuse’ or mitigation — if you had an unavoidable failure (IT outage, documented illness), collect dated proof now (emails, incident logs, medical certificates). HMRC expects contemporaneous records when assessing mitigation claims.
4. Prioritise cashflow for potential liabilities — where late payment interest or secondary penalties may apply, set aside funds or arrange short-term financing; working with MA & CO to model scenarios can prevent surprise collection actions.
5. Agent authorisations & representation — ensure your agent access and authorisations (Online Services, agent services) are current so MA & CO can act quickly if HMRC opens a compliance check.
6. Review open correspondence from HMRC — unresolved notices, prompts, or check letters should be reviewed immediately; do not ignore HMRC letters even if you believe an issue is minor.
7. Plan for longer-term changes — if you’re near income/turnover thresholds tied to tougher regimes (e.g., MTD expansion, penalty reform), speak with MA & CO about structural or timing changes to reduce exposure.

Quick legal note: HMRC guidance and internal manual updates may change procedural rights (appeals, classification). If you receive a penalty notice that looks unusual or if HMRC relies on internal classifications that affect your appeal rights, take specialist advice promptly.

How MA & CO can help — tailored services for immediate protection

MA & CO Accountants offers practical, hands-on support designed for the issues above. From our homepage you’ll see our standard services include HMRC compliance support, tax efficiency reviews, and unlimited telephone & email support — all helpful when urgent action is needed.

• Urgent HMRC correspondence handling: We will review notices, prepare responses and, where appropriate, lodge mitigation/appeals on your behalf.
• Compliance health-check: One-off review of your submission history, pending returns and potential penalty exposure with prioritized actions.
• Penalty mitigation & representation: Gathering evidence, preparing reasonable-excuse narratives and negotiating with HMRC to reduce charges where possible.
• Cashflow & payment planning: Modeling the likely penalty/interest cost and arranging staged payment discussions or time-to-pay where appropriate.

Case studies — short examples

Case A — Late VAT quarterly returns: Client with recurring delays had accrued penalty points under the point-based penalty regime. MA & CO conducted a backlog clear-out, established a filing calendar, and negotiated to avoid a penalty charge by demonstrating corrective behaviour and regularised filings.

Case B — Self Assessment miss during illness: Director missed a Self Assessment filing due to hospitalisation. With contemporaneous medical evidence and a prompt late filing, MA & CO secured mitigation and reduced additional charges.

What to watch next (monitoring list)

• Further HMRC manual updates or new statutory instruments refining penalty application (we will monitor GOV.UK for fresh entries).
• Announcements on Making Tax Digital rollout milestones and any transitional concessions that affect penalty application.
• HMRC collections and enforcement policy tweaks — particularly around automated penalty systems and agent-led interventions.

Resources & official references

• HMRC Compliance Handbook — CH300200 (penalties)
• Interest harmonisation and penalties for late payment and late submission — GOV.UK
• Self Assessment penalties — GOV.UK
• Penalties for late submission (policy)

Need immediate help with an HMRC penalty or compliance query?

MA & CO Accountants provide unlimited telephone & email support, urgent HMRC liaison and penalty mitigation services.

Contact MA & CO now → Book a compliance review

Call: 020 8158 8499 • WhatsApp: 020 3890 1933

Suggested next steps for busy directors

1. Share this article with your finance team and confirm the next filing dates are in your calendar.
2. If you have outstanding HMRC letters, forward them to your MA & CO contact immediately.
3. Ask MA & CO for a 30-minute compliance triage call — we'll prioritise filing risks and confirm mitigation evidence needed.

About MA & CO Accountants
MA & CO provides strategic tax planning, HMRC compliance support, bookkeeping, payroll and audit services with a focus on clear pricing and fast responses. Visit maandcoaccountants.com for service details and contact options.

Disclaimer: This article summarises public HMRC guidance and updates published in the past week. It is for general information and marketing purposes only and does not constitute professional advice for your particular circumstances. For specific advice please contact MA & CO.