The current amount that you can earn before paying any tax is: £6,475
If you earn below the tax free allowance you can claim back any tax that you have paid. Any amount earned over £6,475 will be taxed at 20% until you become a higher rate tax payer when you will pay 40% tax.
Even if you have earned above £6,475 you may still be due a tax rebate, you can check if you have your P60 by using our tax rebate calculator.
If you have any questions, leave them in the comments below.