What is a UTR Number and How To Get and Find It in 2025?

If you’re self-employed or a business owner in the UK, a UTR number (or “unique tax reference number”) is a must for filing taxes.  You will also need to get one if you reach the annual income threshold of £100,000 through PAYE as a hired employee too, since you will need it to file your self-assessment. The number serves as an identifier for self-employed individuals and companies, allowing HMRC to identify and track them.