We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services.
We also use cookies set by other sites to help us deliver content from their services.
You have accepted additional cookies. You can change your cookie settings at any time.
You have rejected additional cookies. You can change your cookie settings at any time.
Departments, agencies and public bodies
News stories, speeches, letters and notices
Detailed guidance, regulations and rules
Reports, analysis and official statistics
Consultations and strategy
Data, Freedom of Information releases and corporate reports
Use the Check Employment Status for Tax (CEST) tool to find out if you, or a worker on a specific engagement, should be classed as employed or self-employed for tax purposes.
Find and use tools and calculators that will help you work out your tax.
Off-payroll working rules for clients, workers (contractors) and their intermediaries.
How to get online help with Self Assessment from HMRC by using our digital assistant, community forums, YouTube videos and online tools.
Register a new partnership for Self Assessment using form SA400.
Find software suppliers for tax returns, supplementary pages and attachments.
Rates, allowances and limits for National Insurance.
Supplementary guidance on how to check tax calculations or work out the trading profits of a business for Self Assessment tax return.
Learn more about your responsibilities if you're running a small business including registration, tax returns, record keeping, tax bills and payments.
Find out which mortgage providers and lenders accept printed tax summaries.
When to apply the off-payroll working rules (IR35) if you receive services from a worker through their intermediary.
Check how much you were paid for SEISS and how to repay an overpaid grant.
Find out if you could claim the cost of training as an allowable business expense if you are a self-employed individual.
How to comply with the reformed off-payroll working rules (IR35), and avoid common mistakes.
Find out what to do if you need to pay back some or all of a SEISS grant.
How Income Tax and National Insurance contributions rules work if you’re a share fisher.
If you operate as a business, find out if you need to include a COVID-19 grant or support payment on your tax return.
How payments to individuals and businesses who use the domestic and non-domestic Renewable Heat Incentive schemes are taxed.
This factsheet explains the checks on tax affairs when HMRC visits a business premises unannounced.
Reporting and paying tax on payments received for use of image rights, including payments made to an image rights company.
Don’t include personal or financial information like your National Insurance number or credit card details.
To help us improve GOV.UK, we’d like to know more about your visit today. Please fill in this survey (opens in a new tab).