HMRC videos on understanding your tax code
Learn more about how tax codes work and reporting a change of circumstances.
Tax code letters and numbers
Watch a video about what your tax code is and how it is used by your employer or pension provider.
You will learn about:聽
- what the numbers in your tax code mean聽
- your tax-free amount for the year聽
- why there are letters in tax codes聽
How tax codes work
Watch a video about how your tax code helps you pay the right amount of tax.聽
You will learn about:聽
- your tax code and tax-free amount聽
- how your tax-free amount is used if you are paid weekly or monthly聽
- different rates of tax and tax rate bands聽
- how to estimate your income tax for the year聽
Emergency tax codes
Watch a video about emergency tax codes, also known as temporary tax codes.聽
聽You will learn about:聽
- W1, M1 and X tax codes聽
- how emergency tax codes work聽
- why you might have an emergency tax code聽
- how long you will have an emergency tax code聽
Changes that can affect your tax code
Watch a video about why your tax code might change.聽
聽You will learn about:聽
- what changes can affect your tax code聽
- income changes and your tax code聽
- how your tax code helps you pay the right amount of tax聽
- tax codes and additional sources of income聽
- tax codes and company benefits聽
Tax code changes and your pay
Watch a video to find out how tax code changes affect your pay.聽
聽You will learn about:聽
- tax code changes when your tax-free amount increases聽
- tax code changes when your tax-free amount reduces聽
- tax code changes when you get a taxable company benefit聽
- in-year adjustments聽to collect tax underpayments
Updating your details if your tax code is wrong
Watch a video about what you can do if your details are not up to date.聽
聽You will learn about:聽
- your personal tax account
- automatic tax code changes
- when you can update your details
- updating your employment or pension details
- updating your existing income
- adding a missing company benefit聽
- what happens when you update your details
Starting a new job without a P45
Watch a video about what information to give your employer if you do not have a P45.
Starting a new job without a P45)
You will learn about:
- finding your National Insurance number
- completing and previewing the starter checklist
- sending the starter checklist to your employer
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