The budget should identify the anticipated cost for everything (salaries, materials, instrumentation, travel costs, etc.) that will be required in order to accomplish the research project. Usually budgets are prepared and submitted as tables with prescribed format. A budget justification typically accompanies the budget request. The budget justification is simply an explanation, item-by-item, stating why you must spend the money requested in order to carry out the experiments planned.
The most important point in preparing a budget is to make sure that you ask for what you really need. Some people underestimate the importance of working through a budget in advance of writing the actual grant proposal. This is really important because most grant programs provide grants with a certain set monetary value. It is critical to ask for the amount you really need because if you don’t ask for what you need you simply won’t be able to do the work and if you can’t carry out your project, it is highly unlikely that you will ever be able to obtain funding from that funding agency again in the near future. At the same time, it is important not to go overboard in padding your budgetary request. A thoughtful budget demonstrates that your project is well conceived and likely to yield quality results. If the reviewers feel that your budget is naïve or over-inflated, that can work against you – your project could be funded at a lower rate or certain items requested might simply be eliminated from the budget by the funding agency - so be sure to think through your budget requests carefully and make sure that all requests are thoughtfully justified.
There are two major components in a budget: