When you have to pay tax as a contractor, you have to do everything at your own since you are the only person responsible for paying tax. You will have to make sure that you are not underpaying or overpaying to keep things simple. At the same time, you have to pay your tax on time to avoid any problems with the tax authorities. You can even face penalties when you are delinquent in paying your tax.
Contractor tax or umbrella companies does not come as a something easy and simple. You have to pay income tax as well as self-employment tax. You also need to claim deductions and see if you qualify for any of them. You also need to see whether you can claim home-office expenses or not. Similarly, you will have to see lot of other things before you can actually pay the contractor tax without any problems.