What's the difference between project bidding and budget?

1, based on different:

The project bidding is based on the preliminary design documents and with reference to the budget quota.

The budget is based on the construction drawing and design documents and with reference to the budget quota.

2, the accuracy is different:

The engineering bidding is universal and the accuracy is not high, with a deviation of 5%- 10% from the actual situation.

The budget is more detailed and accurate, with a deviation of 3%-5% from the actual situation.

3. Different roles:

Project bidding is the basis of determining and controlling project investment, optimizing design scheme, bidding and general contracting of construction projects.

Budget is the basis for determining the cost of unit projects and individual projects, bidding, signing construction contracts and final settlement, and the basis for banks to allocate project prices.

Extended data:

Construction drawing budget:

Construction drawing budget refers to an economic document that calculates the project cost in advance according to the approved construction drawings, construction organization design, current project budget quota, engineering quantity calculation rules, budget unit price of materials and equipment and various charging standards before the proposed project starts.

Main functions:

(1) is the main basis for evaluating and determining the project cost;

(2) It is the basis for compiling pre-tender estimate, bidding documents and signing contracts;

(3) It is the basis of project price settlement;

(4) It is the basis for construction enterprises to make construction plans.

Budget quota:

Construction project budget quota is the standard to determine the materialized labor consumed by each measurement unit of each sub-project in construction products. In other words, it is the standard to determine the quantity of labor and materials consumed by each unit of measurement and the required mechanical shifts.