Bonding capacity is a portfolio decision

Surety capacity comes in two numbers: the largest single job you can bond, and the total work you can have on the books at once. Most bid decisions check the first and ignore the second.

The aggregate is the constraint

A single-job limit tells you whether an opportunity is possible. The aggregate tells you what it costs. Taking a contract that consumes most of your remaining aggregate means the next two opportunities — which you have not seen yet, and which may be better — are decided by this one.

What actually moves capacity

• Working capital and equity. The foundation; nothing else compensates for long.
• Completed-job history at or above the size you are asking to bond.
• Quality of reporting. Timely, reviewed or audited statements and clean work-in-progress schedules.
• Backlog profile. Surety looks at concentration as well as total.

Practical consequences for Go/No-Go

Treat bonding as a scored criterion rather than a yes/no gate. A job at 30% of remaining aggregate scores differently from one at 85%, even though both are technically bondable. If you bid as though only the single-job limit mattered, you will periodically win something that stops you bidding for a quarter.

It is also worth knowing your capacity before you need it. A surety conversation in the week a solicitation closes is a worse conversation than the same one held in a quiet month.