Surety & Bonding Capacity
A construction company's approved limit (set by a surety company based on the contractor's financial strength, work history, and management depth) for how much bonded work it can take on: a per-project single limit and an overall aggregate limit across every bonded project the company has active at once.
Why it matters
Bonding capacity effectively caps how much work a contractor can pursue at all, regardless of how much work is available in the market: a contractor that runs out of aggregate bonding capacity can't bid on new bonded projects even if they have the crews and equipment to perform the work, until existing bonded projects complete and free up capacity.
On a real project
A contractor with a $50 million aggregate bonding limit already has $40 million in active bonded projects. When a new $15 million project comes up for bid, the surety declines to issue a [[concept-bid-bond|bid bond]] because it would push the contractor's total bonded exposure past their approved aggregate limit.
Who this matters most to
A Construction Accountant prepares the financial statements a surety reviews annually to set or adjust a contractor's bonding capacity, making the accountant's work directly responsible for how much work the company can even pursue. A Estimator has to check available bonding capacity before committing significant time to preparing a large bid, since capacity, not interest in the work, can be the real constraint.
Where this goes wrong
A contractor pursues an aggressive growth strategy, taking on several large bonded projects simultaneously without checking their remaining aggregate capacity first. Partway through preparing a bid on a major new project, they discover their surety won't issue a bond because the company is already at its aggregate limit, after investing significant estimating time and cost into a bid they can no longer submit.