Understanding Companies House Filing Extensions in 2026
If you run a plastering business, building firm, or property renovation company as a limited company, you’re required to file accounts and confirmation statements with Companies House on strict deadlines. Missing these can result in penalties, prosecution of directors, and even company dissolution.
The good news? Companies House recognises that 2026 has brought unique challenges for construction sector businesses—from material cost inflation to labour shortages—and has extended its support measures for companies needing additional filing time.
What Filing Deadlines Apply to Limited Companies?
Every UK limited company must file two key documents regularly:
- Annual accounts – Due 9 months after your company’s financial year-end (21 months for your first accounts)
- Confirmation statement – Due at least once every 12 months, confirming your company details are accurate
- Tax return – Separate from Companies House, this goes to HMRC 12 months after your accounting period ends
For a typical plastering contractor with a year-end of 31st March 2026, accounts would be due by 31st December 2026. However, many construction businesses are requesting extensions due to cash flow pressures, delayed client payments, and administrative backlogs.
How to Request a Companies House Extension
The process for requesting a filing extension has been streamlined in 2026, making it easier for busy tradespeople to stay compliant without needing expensive accountants for every step.
Online Extension Application Process
Companies House allows you to apply for a 3-month extension for filing your annual accounts. Here’s the step-by-step process:
- Log into your Companies House account at www.gov.uk/file-your-company-accounts-and-tax-return
- Select “Apply for more time to file” under your company’s filing section
- Provide a valid reason for the extension request (financial difficulties, accountant delays, complex accounts)
- Submit your application at least 2 weeks before your current deadline
- Receive confirmation within 5 working days if approved
Extension Eligibility Criteria 2026
Not every company automatically qualifies for an extension. Companies House considers several factors when reviewing applications:
| Eligibility Factor | Details |
|---|---|
| Filing History | Companies with good compliance records are more likely to receive extensions |
| Previous Extensions | You can only apply once per accounting period; repeated requests may be denied |
| Valid Reason | Must provide specific circumstances (illness, accountant issues, complex transactions) |
| Timing | Apply at least 2 weeks before your deadline for best chance of approval |
| Outstanding Penalties | Companies with unpaid late filing penalties may face additional scrutiny |
Penalties for Late Filing in 2026
Understanding the financial impact of missing deadlines helps construction business owners prioritise compliance alongside project work.
Automatic Penalty Structure
Companies House imposes automatic penalties for late filing, regardless of whether you have a valid excuse. These are civil penalties, separate from any tax penalties from HMRC:
| Time Period Late | Penalty Amount | Additional Consequences |
|---|---|---|
| 1 day – 1 month | £150 | None yet |
| 1 – 3 months | £375 | Warning notices sent |
| 3 – 6 months | £750 | Director prosecution risk increases |
| Over 6 months | £1,500 | Strike-off proceedings may begin |
Director Prosecution and Criminal Penalties
Beyond financial penalties, persistent late filing can lead to criminal prosecution of company directors under the Companies Act 2006. This is particularly serious for construction professionals who rely on maintaining professional credibility.
Potential consequences include:
- Criminal record for directors, affecting future business opportunities
- Disqualification from acting as a company director for up to 15 years
- Personal fines of up to £5,000 in magistrates’ court
- Difficulty securing finance from banks and suppliers due to poor compliance history
Why Construction Companies Need Filing Extensions
The plastering and wider construction sector faces unique challenges that can make timely filing difficult—and Companies House recognises this in their 2026 extension policy.
Common Reasons Construction Firms Request Extensions
Project-based cash flow issues: Many plastering contractors operate on 30-60 day payment terms, with retention clauses holding back 5-10% of project value for 6-12 months after completion. This creates accounting complexities when your financial year closes before retention is released.
Material cost volatility: The construction sector has experienced significant material price fluctuations through 2025-2026, making it difficult to accurately value stock and work-in-progress until supplier invoices are finalised.
Subcontractor payment disputes: If you’re involved in larger renovation projects—similar to the planning required for house renovation projects—disputes with subcontractors or main contractors may need resolution before accounts can be finalised.
Accountant capacity issues: During peak filing season (December-March), many accountants are overloaded, particularly in construction where schemes like the Construction Industry Scheme (CIS) add complexity.
Special Considerations for Small Building Firms
Micro-businesses in the construction sector (under £10.2 million turnover, under £5.1 million balance sheet, fewer than 50 employees) benefit from simplified accounting requirements but still face challenges:
- Many plasterers and small building firms don’t employ full-time bookkeepers
- Director-operators spend time on-site rather than handling administration
- Seasonal work patterns (reduced winter activity) can affect year-end accuracy
- VAT registration and CIS complicate bookkeeping for those unfamiliar with construction-specific rules
Alternative Options If Extensions Are Denied
If Companies House denies your extension request—or you’ve already used your one extension for the period—you still have options to avoid penalties and maintain compliance.
Filing Abbreviated or Simplified Accounts
Small companies can file abridged accounts with Companies House that require less detail than full statutory accounts. This can be completed more quickly while you work on comprehensive accounts for HMRC and internal use.
Abbreviated accounts include:
- Simplified balance sheet (no director’s report required)
- Basic notes to the accounts
- No profit and loss statement (not publicly disclosed)
This approach is particularly useful for plastering businesses focused on managing projects like property renovation for profit, where detailed financial disclosure isn’t necessary for public filing.
Appealing a Penalty
If you miss a deadline despite genuine efforts to comply, you can appeal the automatic penalty within 28 days of receiving the penalty notice. Valid grounds include:
- Serious illness of the director or accountant
- Fire, flood, or theft affecting financial records
- Postal delays (if filing by paper—rare in 2026)
- Unforeseeable disruption (though “being busy” is not sufficient)
Construction businesses should document any extraordinary circumstances affecting filing ability, such as major project delays, client insolvency, or disasters affecting business premises.
Managing Filing Deadlines Alongside Construction Projects
Running a plastering business means balancing on-site work with administrative obligations. Here’s how successful construction firms manage Companies House compliance without sacrificing billable hours.
Set Up Accounting Systems Early
Use construction-specific accounting software like Xero, QuickBooks, or Sage with CIS functionality built in. These platforms:
- Automatically track retention, stage payments, and variations
- Generate CIS returns for monthly HMRC submission
- Integrate with Companies House filing services
- Provide real-time financial visibility without end-of-year surprises
Initial setup costs £10-30/month for most small plastering firms—a worthwhile investment compared to last-minute accountant fees of £500-1,500 for rushed year-end work.
Establish Monthly Management Routines
Rather than leaving everything until filing deadlines approach, implement monthly financial management:
| Task | Frequency | Time Required |
|---|---|---|
| Bank reconciliation | Monthly | 1-2 hours |
| Invoice review | Monthly | 30 minutes |
| Expense categorisation | Weekly | 15 minutes |
| CIS verification | Monthly (by 19th) | 30 minutes |
| VAT preparation | Quarterly | 2-3 hours |
By staying on top of bookkeeping throughout the year, you’ll have accurate financial data ready when your accountant needs it—eliminating the need for most extension requests.
Build Relationships with Construction-Specialist Accountants
Not all accountants understand construction industry nuances. Look for practices familiar with:
- Construction Industry Scheme (CIS) tax treatment and verification
- Retention accounting for longer-term projects
- VAT reverse charge on construction services (mandatory since 2021)
- Capital allowances on tools, vehicles, and equipment
- Flat rate VAT schemes popular with smaller building firms
Construction-specialist accountants typically charge £800-2,000 annually for small plastering businesses (compared to £500-1,200 for generalist accountants) but provide significantly better tax planning and compliance support.
2026 Changes to Companies House Requirements
Several important reforms have been implemented under the Economic Crime and Corporate Transparency Act 2023, now fully in effect during 2026. These changes affect how construction businesses interact with Companies House.
Identity Verification for Directors
All company directors must now complete identity verification with Companies House. This one-time process requires:
- Valid photo ID (passport or driving licence)
- Proof of residential address (utility bill or bank statement from last 3 months)
- Verification through Companies House’s online portal or authorised agent
For plasterers running limited companies, this affects both active directors and those listed as “shadow directors” due to significant control over the business.
Registered Office Reforms
Companies House now conducts more rigorous checks on registered office addresses. Using residential addresses is still permitted, but PO boxes and mail forwarding services face increased scrutiny.
Many plastering contractors use their home address as the registered office. Be aware that this information is publicly available and appears on all official correspondence, including when dealing with clients on larger projects like kitchen renovations or bathroom redesigns.
Enhanced Authorised Corporate Service Providers (ACSPs)
If you use formation agents or company secretarial services, they must now be registered as Authorised Corporate Service Providers with Companies House. This provides additional consumer protection for construction businesses using third-party filing services.
Frequently Asked Questions
Can I get more than one extension for filing my accounts?
No, Companies House allows only one 3-month extension per accounting period for annual accounts. However, if you have exceptional circumstances (serious illness, natural disaster, business disruption), you can write to Companies House explaining the situation and requesting additional time beyond the standard extension. These are handled case-by-case and require substantial evidence.
For plastering businesses facing ongoing difficulties, consider changing your accounting reference date to give yourself more natural breathing room between your busiest season and filing deadlines.
Does requesting an extension affect my company’s credit rating?
The extension request itself doesn’t appear on your company record or affect credit scores. However, late filing does appear on your publicly available company record and will be visible to credit reference agencies, potential clients, and suppliers checking your business before awarding contracts.
This is particularly important for plasterers bidding on larger commercial projects or working with property developers who conduct thorough due diligence on subcontractors.
What happens if I file my accounts late but they show the company is profitable?
Profitability is irrelevant to filing penalties—they’re based solely on missing the deadline. Even if your plastering business had a record year with £200,000+ profit, you’ll still face the automatic penalty structure outlined above.
The only way to avoid penalties is to file on time or secure an approved extension beforehand. Companies House makes no exceptions based on your financial performance.
Can I request an extension for my confirmation statement?
No, unlike annual accounts, Companies House does not grant extensions for confirmation statements. These must be filed within 14 days of your review date (the anniversary of incorporation or your last confirmation statement).
Confirmation statements are simpler than accounts—they just confirm your company details (directors, shareholders, registered office, SIC codes) remain accurate—so extensions are rarely necessary. The filing fee is £34 for paper filing or £13 online.
Will HMRC automatically grant me more time if Companies House approves my extension?
No. Companies House and HMRC are separate organisations with different deadlines. Your Corporation Tax return is due to HMRC 12 months after your accounting period ends, regardless of when you file accounts with Companies House.
However, HMRC does allow appeals for reasonable excuse if you file your CT600 late. Many construction accountants recommend filing estimated figures with HMRC by the deadline, then amending once your final accounts are complete—avoiding the £100+ late filing penalties and potential daily penalties of £10.
As a sole trader, do I need to worry about Companies House deadlines?
No. If you operate as a sole trader or partnership, you don’t file anything with Companies House—only with HMRC through your Self Assessment tax return. Companies House requirements apply exclusively to limited companies and limited liability partnerships (LLPs).
Many smaller plastering businesses start as sole traders before incorporating when turnover exceeds £85,000 (VAT threshold) or when the tax advantages of limited company status become significant (typically around £50,000-60,000 profit).
Conclusion: Staying Compliant While Growing Your Construction Business
Understanding Companies House extension options gives construction business owners breathing room during challenging periods, but the goal should always be proactive compliance rather than last-minute extensions.
For plasterers and building contractors focused on delivering quality work—whether that’s achieving perfect skim coats, managing complex renovation projects, or expanding into commercial work—administrative compliance can feel like a distraction. However, maintaining good standing with Companies House protects your business reputation and keeps you eligible for the financing, supplier credit, and large contracts that drive growth.
Set up robust systems early, work with construction-specialist advisors, and treat filing deadlines with the same professionalism you bring to every plastering job. Your business—and your peace of mind—will benefit significantly.