A constructor for decoration our garden wants to invoice by using Eezy. Can they also invoice the share of machine work, but also delivered materials and other supplies?

Yes, the service provider can invoice, based on your agreement, work related expenses such as machine rent and materials. You can agree on the invoicing price directly with the service provider. The service provider uses the expenses as a deduction in the salary payment and the actual profit is taxable income. Remember, that you are allowed to apply tax credit for household work from the actual work but not from the materials or travel expenses.