Question 1

Can I use more than one SIC code?

Accepted Answer

Yes. Companies House allows up to four SIC codes per company. Your primary SIC code should reflect your main trading activity, and you can add secondary codes for other activities.

Question 2

Can I change my SIC code later?

Accepted Answer

Yes. You can update your SIC codes on your next Confirmation Statement filed with Companies House. There's no separate application process.

Question 3

What happens if I choose the wrong SIC code?

Accepted Answer

Choosing the wrong SIC code won't create legal problems immediately, but it can affect how HMRC classifies your business, delay bank account applications, and cause confusion in investor due diligence. It's best to correct it promptly.

Question 4

Should the SIC code match my main revenue activity?

Accepted Answer

Ideally, yes. Your primary SIC code should describe the activity that generates most of your revenue. Secondary codes can cover other activities.

Question 5

Where do SIC codes appear in Companies House filings?

Accepted Answer

SIC codes are shown on your public Companies House record and must be confirmed or updated on your annual Confirmation Statement (CS01).

Question 6

Why is Verity's list 'condensed'?

Accepted Answer

Companies House publishes a 'condensed' list — a curated subset of the full UK SIC 2007 classification. This condensed list is the only set accepted for company registration and annual filings.

Question 7

What SIC code should I use for a SaaS company?

Accepted Answer

Most SaaS businesses use 62012 (Business and domestic software development) or 62020 (Information technology consultancy activities). If you sell software subscriptions, 62012 is usually the best fit.

Question 8

What SIC code do consultants use?

Accepted Answer

Management consultants typically use 70229 (Management consultancy activities other than financial management). IT consultants often use 62020. Financial consultants may use 70221 (Financial management).

Question 9

Do I need a SIC code before opening a bank account?

Accepted Answer

Yes. UK banks require your Companies House registration (which includes your SIC code) before opening a business account. Choosing the right SIC code upfront avoids delays.

Question 10

Is choosing a SIC code the same as registering for tax?

Accepted Answer

No. Your SIC code is for Companies House classification only. You still need to register separately with HMRC for Corporation Tax, VAT, and PAYE if applicable.

UK SIC Code Picker

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