Bonding capacity, surety and reporting to sureties and lenders

For most commercial and public construction, a contractor cannot even bid without a surety bond, so the amount of bonded work a surety will support, its bonding capacity, often limits the firm's growth more than demand does. Sureties decide that capacity largely from the contractor's financial statements and the schedules behind them. This lesson looks at surety from the financial side: what a surety is underwriting, how it reads and adjusts a contractor's statements, how bonding limits are set, and what information sureties and lenders expect and when. The types of bonds, their claims processes and the insurance that sits alongside them are covered in CON-350; CON-220 covers the contract and legal side.

What a surety does

A surety bond is a three-party agreement. The contractor (the principal) promises the owner (the obligee) to perform the contract or to pay its subcontractors and suppliers, and the surety guarantees that promise. If the contractor defaults, the surety steps in to complete the work or pay the claims, up to the bond amount. Unlike insurance, surety is underwritten on the expectation of no loss: the contractor and, for private firms, its owners sign an indemnity agreement promising to repay the surety for anything it pays out. A surety's real exposure is the risk that the contractor fails and the indemnitors cannot repay.

Standard bond forms used in Canada include CCDC 220 (bid bond), CCDC 221 (performance bond) and CCDC 222 (labour and material payment bond), alongside forms issued by public owners and the Surety Association of Canada. Federal and provincial public owners generally require performance and payment security on contracts above set thresholds.

Because the surety guarantees performance, its underwriters ask the same question a lender asks, can this contractor pay its debts, plus a harder one: can it finish all the work it has taken on, and if it fails, how much would it cost the surety to finish?

The three Cs of surety underwriting

Surety underwriters traditionally summarize what they look for as character, capacity and capital.

Capital is the part this course can measure, but experienced underwriters weigh all three. A firm with strong capital but a history of disputes and surprises will find its capacity limited; a firm with modest capital but a long record of reliable performance and transparent reporting may be supported beyond what the ratios alone suggest.

How sureties adjust the financial statements

Sureties do not take the balance sheet at face value. They adjust working capital and equity to remove items that might not be available if the firm got into trouble, and to add items that strengthen it. The adjustments vary between sureties, but a typical approach is shown below.

# Kestrel's adjusted working capital as a surety might calculate it (illustrative)
working_capital = 2_450_000
adjustments = {
    "receivables over 90 days (50 %)":            -0.5 * 470_000,
    "underbillings (50 %)":                       -0.5 * 1_150_000,
    "prepaid expenses and deposits":              -350_000,
    "unrecorded loss provision, school addition": -95_696,
    "next-year operating lease payments":         -120_000,
}
adjusted = working_capital + sum(adjustments.values())
for k, v in adjustments.items():
    print(f"{k:45} {v:>11,.0f}")
print(f"{'Adjusted working capital':45} {adjusted:>11,.0f}")
equity_adj = 4_400_000 - 95_696
print(f"Adjusted equity: {equity_adj:,.0f}")

receivables over 90 days (50 %)                  -235,000
underbillings (50 %)                             -575,000
prepaid expenses and deposits                    -350,000
unrecorded loss provision, school addition        -95,696
next-year operating lease payments               -120,000
Adjusted working capital                        1,074,304
Adjusted equity: 4,304,304

On these adjustments, Kestrel's working capital of $2.45 million becomes about $1.07 million in the surety's eyes, a reduction of more than half. The loss provision for the school addition should already have been recorded (Lesson 5); here it is shown as an adjustment on the assumption that the surety found it during its review. Kestrel's management might dispute some of these adjustments, for example by showing that the underbillings are due to approved changes billed the following week, which is exactly why clear documentation of the WIP schedule matters.

Setting bonding limits

Sureties set two limits. The single-job limit is the largest individual contract they will bond. The aggregate limit is the total value of uncompleted bonded work (and often unbonded work too) they will allow the contractor to carry at one time. Both are commonly related to adjusted working capital and adjusted equity through multiples that depend on the type of work, the firm's history and the surety's appetite. As a broad illustration only, an aggregate program of roughly 10 to 20 times adjusted working capital is often quoted for general contractors, with lower multiples for weaker firms or riskier work and higher multiples for firms with long, reliable records.

adjusted_wc = 1_074_304
for multiple in (10, 15, 20):
    print(f"Aggregate at {multiple}x adjusted working capital: {multiple * adjusted_wc / 1e6:5.1f}M")
backlog_uncompleted = 41_000_000
print(f"Kestrel's uncompleted backlog: {backlog_uncompleted / 1e6:.1f}M")
print(f"Multiple implied by current backlog: {backlog_uncompleted / adjusted_wc:.1f}x")

Aggregate at 10x adjusted working capital:  10.7M
Aggregate at 15x adjusted working capital:  16.1M
Aggregate at 20x adjusted working capital:  21.5M
Kestrel's uncompleted backlog: 41.0M
Multiple implied by current backlog: 38.2x

Kestrel's backlog of $41 million is about 38 times its adjusted working capital, far beyond the illustrative range. Not all of the backlog is necessarily bonded, and a surety would look at the whole picture, including the founders' personal net worth, the firm's record and its bank line. But the numbers show why the surety would want to talk about Kestrel's growth plans, and why improving working capital, by retaining profits, collecting old receivables and clearing underbillings, would directly increase the work Kestrel can take on.

What sureties look for beyond the ratios

A rule of thumb many underwriters apply to job size is that the largest single job should not normally exceed a modest multiple of the largest job the firm has completed successfully, often around one and a half to two times, and should not be so large that a loss on it would exhaust the firm's equity. Kestrel's largest open job, the $21.4 million Riverside co-op, is its biggest ever; the surety will have watched its progress closely.

The information sureties and lenders request

Sureties and banks build their files from a standard set of documents. Delivering them on time and complete is one of the cheapest ways a contractor can increase its credit.

CCDC 11, the Contractor's Qualification Statement, is a standard form owners use to prequalify contractors, covering company information, experience, key personnel, safety and financial capacity, often with a surety's letter confirming bonding availability.

Interim reporting and the timing problem

Year-end statements describe a firm that existed months earlier. Sureties therefore rely heavily on interim statements and WIP schedules, which the contractor prepares itself. Their usefulness depends on their quality: interim statements that consistently show higher margins than the year-end statements that follow will be discounted. Contractors that close monthly and produce reliable WIP schedules (Lessons 2 and 5) can provide credible interim information quickly, which pays off whenever they need an increase in their program or support on a troubled job.

When things go wrong

If a job turns bad, the instinct to hide it until it can be fixed is strong and almost always harmful. Sureties and banks have far more options when they learn of a problem early: they can arrange funds, help negotiate with the owner, support a recovery plan or bring in an outside consultant. Learning of the problem from a claim on a bond, or from an unexpected loss in the year-end statements, destroys trust and usually ends the relationship. Early, honest disclosure is part of character, and character is what keeps a surety supporting a contractor through a difficult year.