Three bonds come up most: the bid bond, the performance bond and the payment bond. The surety charges a premium, and the premium is a job cost.
Example: the front-end documents require performance and payment bonds from the general contractor. The subcontract may pass a bond requirement down to larger subcontractors.
Look for bond requirements in the instructions to bidders and the supplementary conditions. Rules differ by owner and by state, so check the bid documents. If you must bond, get the rate from your surety agent and include it in your price.
Takeoff Tool reads bond requirements from the packet and shows the quote they came from.