CASUALTY TYPES & BONDS · 6 MIN READ
Surety Bonds: Contract, Commercial, and Federal
A surety bond is a three-party instrument, not insurance. The principal owes a duty, the obligee is protected, and the surety guarantees performance up to the bond's penal sum. Unlike an insurer, a surety expects no losses: it underwrites the principal on the Three C's — Character, Capacity, and Capital — and if it pays, it recovers from the principal through a General Agreement of Indemnity and through subrogation to the obligee's rights, which can include equitable liens and constructive trusts on traceable funds when a fiduciary defaults. Contract surety follows the construction cycle. The bid bond guarantees the bidder will sign the contract and furnish performance and payment bonds if awarded; on default the obligee recovers the lesser of the penal sum or its actual re-bid damages — the spread between the defaulting bid and the next-lowest acceptable bid. The performance bond guarantees completion of the work (with completion or takeover options for the surety), the payment bond guarantees payment of subcontractors and suppliers, and the maintenance bond warrants against defective work appearing during a stated post-completion period, typically one or two years. On federal construction, the Miller Act requires performance and payment bonds on contracts exceeding $150,000, with the payment bond protecting first- and second-tier subcontractors and suppliers; state Little Miller Acts mirror the scheme for state and local public works. Subcontractor Default Insurance is a two-party insurance alternative, not a bond. Commercial surety covers everything else. License and permit bonds guarantee compliance with the laws governing a licensed activity. Court bonds split into judicial bonds (appeal and supersedeas bonds staying judgment enforcement) and fiduciary or probate bonds guaranteeing that administrators, executors, guardians, and conservators faithfully perform. Public official bonds protect the governmental unit and its citizens against an official's failure to faithfully perform statutory duties or misappropriation of public funds. A large federal layer exists as well: FMCSA requires freight brokers and forwarders to post $75,000 in financial responsibility; mortgage loan originators satisfy SAFE Act financial-responsibility rules with surety bonds scaled to origination volume; customs bonds secure duties on bonded-warehouse merchandise; BLM lease bonds secure well plugging and reclamation on federal lands; and self-insured workers compensation employers bond their obligations to the state regulator.
Key rules
Surety is three-party with full recourse: the surety recovers its payments from the principal
The principal, obligee, and surety stand in a triangle; indemnity agreements and subrogation give the surety recourse, which is why sureties underwrite to zero expected loss using the Three C's.
Why the exam cares: The exam contrasts suretyship with insurance by testing recourse, the party structure, and the no-loss underwriting philosophy.
Bid bond recovery is the LESSER of the penal sum or actual re-bid damages
If a $4,000,000 low bidder with a 10% bid bond refuses the contract and the next bid is $4,250,000, the obligee recovers $250,000 — not the $400,000 penal sum.
Why the exam cares: The lesser-of calculation is a signature hard question, and the penal sum is always offered as the tempting wrong answer.
Performance, payment, and maintenance bonds guarantee distinct phases of the contract
Performance guarantees completion through substantial completion, payment protects subs and suppliers with separate rights of action, and maintenance warrants workmanship for a post-completion period.
Why the exam cares: Scenario questions name a phase — mid-construction default, unpaid supplier, latent defect — and ask which bond responds.
The Miller Act requires performance and payment bonds on federal jobs over $150,000
The federal bid bond is typically 20% of the bid capped at $3,000,000; the payment bond gives unpaid first- and second-tier subs and suppliers a right of action; Little Miller Acts apply the model to state public works.
Why the exam cares: Federal-versus-state public works bonding and the protected tiers of claimants are frequent test points.
Commercial surety spans license and permit, court and fiduciary, public official, and federal bonds
License bonds guarantee regulatory compliance to a government obligee; fiduciary bonds protect estates and wards through the court; public official bonds protect the public fisc; federal programs add broker, customs, mineral-lease, and self-insurer bonds.
Why the exam cares: Classification questions give a bond scenario and ask which commercial surety category it belongs to.
Numbers to memorize
- $150,000 — federal construction contract threshold triggering Miller Act bonds
- 20% of the bid, capped at $3,000,000 — typical federal bid bond penal sum
- $75,000 — FMCSA financial responsibility for freight brokers and freight forwarders (BMC-84 bond or BMC-85 trust)
- 1–2 years — typical maintenance bond warranty period after substantial completion
- $25,000–$500,000 — typical mortgage broker surety bond range scaled to origination volume
- Bid bond recovery = lesser of penal sum or (defaulting bid − next-lowest acceptable bid)
Common traps
- Assuming the obligee always collects the full penal sum on a bid bond — recovery is the lesser of the penal sum or actual re-bid damages.
- Confusing the performance bond with the payment bond — performance protects the owner's completion interest, while payment protects subcontractors and suppliers with their own rights of action.
- Confusing a public official bond with Public Officials Liability E&O — the bond guarantees faithful performance and fund handling to the government, while POL E&O insures officials against wrongful-act claims.
- Treating a surety bond like insurance — the surety expects no loss and holds indemnity and subrogation recourse against the principal, unlike an insurer that prices for expected losses.
Identify the three parties first in every bond question — who owes the duty, who is protected, who guarantees — because obligee identification alone eliminates most wrong answers.
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