# Company Unique Tax Reference (UTR)

When you set up your limited company, HMRC will post your Corporation Tax UTR to the company’s registered address. You may also receive a CT600 notice (a letter reminding you to file your company tax return) that includes the same code.

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### **What the UTR is for**

Your company UTR is a 10-digit number that identifies your business for Corporation Tax purposes.\
We’ll need this code to file your company’s tax returns with HMRC.

Keep it confidential - it should only be shared with your accountant or HMRC.

You may also have a separate personal UTR for Self Assessment. Make sure not to confuse the two.

### If you haven’t received it

You can request a copy of your company’s UTR from HMRC [online](https://www.tax.service.gov.uk/ask-for-copy-of-your-corporation-tax-utr). HMRC will post it to the business address registered with Companies House.