How To Write A Cost And Budget Plan. Have one color highlighter for groceries, one for eating out, one for entertainment, etc. If the budget at completion (bac) of the project is $800,000, the estimate to complete is ($800,000 − $80,000) ÷ 0.94 = $766,000.

A very quick summary of the process of calculating project cost is: The last most important part is to review the budget and verify the costs and calculation. It matches the project plan that we created so you can use the two in tandem.