In order for you to gain tax-relief on expenses they must be deemed allowable business expenses and have been incurred wholly, exclusively and necessarily in the performance of your duties. Allowable expenses for site-based workers are set by legislation; no umbrella company can provide tax-relief on expenses which others can't. The rules are the same for everybody! BBuffalo provides a detailed list of potentially allowable expenses on the 'What can be claimed?' page.
You should record your expenses as often as possible online by logging in to your BBuffalo account. This will make claiming your expenses easier and ensure you maximise your tax-relief as you go.
Even though you don't have to submit all expenses to us we strongly recommend that you retain your expense receipts. In some cases HMRC may require receipts to substantiate particular expenses and it is your responsibility to be able to produce them if requested. BBuffalo have outlined best practice for substantiating each claim within our expenses guidelines and you can email questions for clarification any time you require.