What Happens if I Choose the Wrong SIC Code?

Choosing the wrong SIC code does not normally invalidate a UK limited company or prevent it from trading. However, it can make the company’s public record inaccurate and may cause questions during banking, funding or compliance checks.

You should correct an inaccurate SIC code by filing a confirmation statement with Companies House.

Will Companies House Reject My Company Registration?

Companies House may reject an incorporation application if you use an invalid code or one that is not included in its condensed SIC-code list.

If the code is valid but does not accurately describe the company, the registration may still be accepted. However, Companies House can challenge information that appears inaccurate, inconsistent or misleading.

Is Choosing the Wrong SIC Code Illegal?

An accidental mistake does not normally mean that the company has committed an offence.

However, directors are responsible for keeping company information accurate. You should correct the code as soon as you discover the error, particularly if it materially misrepresents the company’s activities.

Deliberately providing false or misleading information can have more serious consequences.

Can the Wrong SIC Code Affect a Business-Account Application?

Yes. Banks and other financial providers may use SIC codes to understand a company’s activities and assess its risk level.

An inaccurate code could result in:

• Additional verification questions
• Requests for more documents
• Delays in opening an account
• Incorrect risk classification
• A rejected application
• Reviews of an existing account

The company’s SIC codes should be consistent with its website, invoices, business plan and expected transactions.

Can It Affect Finance or Funding?

Potentially. Lenders, investors and funding programmes may use SIC codes to determine a company’s industry or eligibility.

An incorrect code could:

• Place the company in the wrong sector
• Affect funding eligibility
• Produce an inaccurate risk assessment
• Create inconsistencies in an application
• Delay financial checks

Correcting the code before applying for finance can reduce unnecessary questions.

Can the Wrong Code Affect Insurance?

An insurer may compare the company’s stated activities with its Companies House record.

If the SIC code does not match the business, the insurer may request clarification. The company must always describe its activities accurately when applying for insurance, regardless of the SIC code displayed at Companies House.

A SIC-code change alone does not automatically update an insurance policy.

Does a SIC Code Determine Tax or VAT?

No. A SIC code does not automatically determine:

• Corporation Tax
• VAT registration
• VAT rates
• Allowable expenses
• Payroll obligations
• Tax relief eligibility

However, an inaccurate code may create questions if it conflicts with information provided to HMRC or other organisations.

Correcting the SIC code does not replace any separate tax notification that may be required.

Does a SIC Code Authorise Regulated Activities?

No. Selecting a SIC code does not give a company permission to conduct regulated business.

A SIC code does not replace:

• Regulatory authorisation
• Professional registration
• Industry licences
• Local authority permissions
• Insurance requirements

The company must obtain any separate approvals required for its activities.

What if I Registered a Trading Company as Dormant?

A genuinely dormant company commonly uses:

99999 – Dormant company

If the company has started trading, it should replace this with an appropriate trading SIC code. Continuing to display a dormant code while actively trading may create confusion and inconsistencies.

The company may also need to inform HMRC that it has started trading. Updating Companies House does not automatically complete all tax requirements.

How Do I Correct the Wrong SIC Code?

You can correct the code by filing a confirmation statement with Companies House.

You can:

• Replace an incorrect code
• Add other relevant codes
• Remove codes that no longer apply
• Change a dormant or non-trading code
• Select up to four valid codes

If the next confirmation statement is not due soon, you can file an early statement to update the information immediately.

Will the Old SIC Code Remain Visible?

The current company overview will display the latest accepted SIC codes. Historical filings and previous confirmation statements may remain available on the public Companies House record.

Correcting the information promptly shows that the company’s present details are accurate.

How Can I Avoid Choosing the Wrong Code?

Before filing:

1. Identify the company’s principal activity.
2. Search the Companies House condensed list.
3. Read the complete code description.
4. Distinguish between retail, wholesale, manufacturing and services.
5. Use additional codes only for significant activities.
6. Avoid codes for future or unrelated plans.
7. Review the codes whenever the business changes.

Final Thoughts

Choosing the wrong SIC code does not normally invalidate your company, but it can create an inaccurate public record and cause problems during banking, funding, insurance and compliance checks.

Correct the mistake by filing a confirmation statement and make sure the new code accurately reflects what the company currently does.

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