Expenses are generally calculated in proportion to the contract amount, while taxes and fees are usually calculated according to the actual transaction amount. Because the estimation does not reflect the actual cost and amount, if the fees and taxes are included in the summary table of unit project cost, the result may be inaccurate.
However, the specific situation may vary by region and industry. Some tender documents or specific laws and regulations require that the provisional estimate be included in the calculation of fees and taxes. At this time, you need to read the bidding documents and relevant laws and regulations carefully to understand the specific requirements and regulations.
The best way is to consult professionals, such as bidders, financial consultants or accountants, before bidding, so as to ensure a correct understanding of local laws and requirements and to abide by applicable accounting standards and laws and regulations.