Hi Wing Sze Tse,
If your your rental income for the tax year exceeds £10,000.00 (i.e., before allowable expenses), or your rental profit for the tax year exceeds £2,500.00 (i.e., after allowable expenses) then you are required to register for Self Assessment and send a Self Assessment tax return to report your income and pay any tax that may be due. You should register before the 5th October following the end of the tax year.
To register, please visit:
Check how to register for Self Assessment
If your income / profit falls below the limits mentioned above, you can report your rental income to HMRC in writing without completing a Self Assessment return.
The address to write to is:
Pay as You Earn and Self Assessment,
HM Revenue and Customs,
BX9 1AS.
If you write to us, please provide details of your total rental income, and a list of any allowable expenses you have claimed when calculating your profit.
For help calculating your taxable profit, please visit
www.gov.uk and search for ‘Work out your rental income when you let property’.
Thank you.