Working Capital & Surety Bonds: Why It Matters for Your Bonding Program

Why Working Capital Is the Most Important Number in Bonding

If there is one financial metric that determines the size and strength of your surety bond program, it is working capital. Working capital indicates a company's ability to pay off its short-term liabilities and is the primary financial indicator sureties use to determine the amount of bonding support they will provide — both on a single project basis and in aggregate.

Every surety underwriter in the country starts their financial analysis of a contractor by looking at working capital. It is the first number they calculate, the benchmark they compare against industry standards, and the foundation upon which your entire bonding capacity is built. Understanding how sureties calculate and evaluate working capital is essential for any contractor who wants to grow their bond program and take on larger contract bond opportunities.

How Working Capital Is Calculated

At its most basic level, working capital is calculated using a simple formula:

Working Capital = Current Assets − Current Liabilities

Current assets are resources that can be converted to cash within 12 months. For construction contractors, these typically include:

• Cash and cash equivalents
• Contract receivables (amounts owed to you for completed work)
• Retainage receivable
• Costs and estimated earnings in excess of billings (underbillings)
• Short-term investments
• Prepaid expenses
• A portion of inventories (materials and supplies)

Current liabilities are obligations due within 12 months, including:

• Accounts payable (amounts you owe subcontractors and suppliers)
• Accrued expenses (wages, taxes, insurance premiums)
• Current portion of long-term debt
• Billings in excess of costs and estimated earnings (overbillings)
• Short-term notes payable

If a contractor has $2,500,000 in current assets and $1,800,000 in current liabilities, their working capital is $700,000. But the story does not end there — sureties make significant adjustments to arrive at what they consider adjusted working capital.

How Sureties Adjust Your Working Capital

A surety will not simply accept the working capital figure that appears on your balance sheet at face value. Underwriters routinely discount or remove certain items from the working capital calculation to arrive at a more conservative and realistic picture of your financial liquidity. Here are the most common adjustments:

• Prepaid expenses: Depending on the makeup, prepaid expenses may be partially or fully discounted. Prepaid insurance, for example, has limited liquidation value.
• Inventories: If materials or supplies have not been turned over within a 12-month period, sureties may discount or remove them entirely. Stale inventory is not a liquid asset.
• Owner/officer receivables: Money owed to the company by its owners or officers is typically removed from working capital. Sureties view these as distributions in disguise and unlikely to be repaid on demand.
• Related party receivables: Notes or receivables from related companies, family members, or affiliates are discounted or removed for the same reasons as officer receivables.
• Aged contract receivables: Receivables aged over 90 days are scrutinized carefully. Unless the contractor can provide evidence that payment is expected (such as a payment schedule from the owner or a documented dispute resolution), receivables beyond 90 days may be removed.
• Volatile investments: Short-term investments may be discounted depending on their volatility. Stocks and speculative investments carry more risk than Treasury bills or money market funds.

On the positive side, sureties will typically add back the cash surrender value of life insurance policies owned by the company or its principals. This is a liquid asset that most balance sheets do not include in current assets.

The result of these adjustments is a number that the surety considers a reliable indicator of how much cash the contractor could actually access in the near term — and that adjusted figure is what drives your bonding capacity.

Working Capital Benchmarks for Contractors

While every surety has its own underwriting guidelines, general benchmarks help contractors understand where they stand. Here are common working capital benchmarks used in the surety industry:

• Single bond limit: Many sureties use a multiplier of 10x to 15x working capital to determine the maximum single bond they will support. A contractor with $500,000 in adjusted working capital might qualify for single bonds in the $5 million to $7.5 million range.
• Aggregate bond limit: The aggregate program (total bonded backlog) is often set at 15x to 20x working capital, depending on the surety and the contractor's overall profile.
• Current ratio: Sureties look for a current ratio (current assets ÷ current liabilities) of 1.3 or higher. A ratio below 1.0 means current liabilities exceed current assets — a red flag for any underwriter.

These are guidelines, not rigid rules. A contractor with strong working capital but weak profitability may receive less support than these multipliers suggest. Conversely, a contractor with moderate working capital but excellent project history, a clean backlog, and strong personal indemnity may receive more favorable treatment. The Three Cs of surety — Character, Capacity, and Capital — all factor into the final determination.

How Working Capital Affects Your Bond Limits

The relationship between working capital and bonding capacity is direct and powerful. Here is a simplified example of how two contractors with different working capital positions receive different bond programs:

Contractor B, with $500,000 more in working capital, has access to bond programs that are roughly 2.5x larger than Contractor A. That difference translates directly into the ability to bid on larger public projects, take on more simultaneous work, and grow revenue. For contractors looking to increase their bonding capacity, improving working capital is the single most impactful action they can take.

Strategies to Improve Your Working Capital

Improving your working capital is not about accounting tricks — it is about genuinely strengthening your company's financial position. Here are proven strategies that contractors use to build working capital over time:

• Retain profits in the business: The most straightforward way to grow working capital is to leave profits in the company rather than distributing them. Every dollar of retained earnings that stays on the balance sheet directly increases working capital and net worth.
• Accelerate receivables collection: Implement disciplined billing and collection practices. Submit pay applications on time, follow up on outstanding invoices aggressively, and consider offering small discounts for early payment on private work. Aged receivables over 90 days may be discounted by the surety, so keeping them current matters.
• Manage overbillings carefully: While overbilling (billing ahead of costs) generates short-term cash, excessive overbilling inflates current liabilities and can actually reduce your working capital. Sureties pay close attention to the relationship between overbillings and underbillings.
• Refinance short-term debt to long-term: If you have equipment loans or lines of credit classified as current liabilities, refinancing them into longer-term obligations moves them out of the working capital equation. A 5-year equipment loan removes the full balance from current liabilities (except the current year's payments).
• Clean up officer receivables: If the balance sheet shows money owed by officers or owners, repay those amounts or offset them. Sureties will remove them from working capital, so having them on the books provides no benefit to your bonding program.
• Time year-end distributions carefully: Large distributions taken at year-end reduce working capital on the financial statements the surety will review. Work with your CPA to time distributions so they minimize the impact on your balance sheet at the reporting date.

The Role of Your CPA in Bonding

A construction-oriented CPA is one of the most valuable partners a contractor can have when it comes to building a strong bonding program. General CPAs may prepare technically accurate financial statements, but a CPA who specializes in construction understands the nuances that sureties care about:

• Percentage of completion accounting: Sureties strongly prefer financial statements prepared using the percentage of completion method, which matches revenue and costs to the progress of each project. This method gives the most accurate picture of a contractor's financial position and is considered the industry standard for bonded contractors.
• WIP schedule preparation: A well-prepared work-in-progress schedule is as important as the financial statements themselves. Your CPA should help you prepare a WIP that accurately reflects the status of every active project.
• Year-end planning: Strategic decisions about prepaid expenses, inventory levels, debt structure, and distributions at year-end can significantly impact how your working capital appears on the financial statements the surety reviews.
• Statement type: For standard bond programs supporting larger projects, sureties typically require CPA-reviewed or audited financial statements. Reviewed statements are generally sufficient for most bond programs; audited financials are typically required when aggregate bonding programs reach the $5 million to $10 million range, though requirements vary by surety. Your CPA needs to understand these thresholds and prepare accordingly.

If your current CPA does not specialize in construction, consider making a switch. The difference between a general CPA and a construction-oriented CPA can translate directly into hundreds of thousands or even millions of dollars in additional bonding capacity.

Common Working Capital Mistakes Contractors Make

• Taking large year-end distributions: Owner distributions taken right before the fiscal year-end reduce working capital and net worth on the financial statements the surety reviews. Plan distributions throughout the year or after the reporting date.
• Letting receivables age: Every receivable over 90 days is at risk of being discounted by the surety. Contractors who do not aggressively collect on aged receivables are leaving bonding capacity on the table.
• Carrying officer loans: Loans to owners or officers are removed from working capital entirely. They provide zero benefit to your bonding program and should be eliminated.
• Using completed contract accounting: The completed contract method delays revenue recognition until a project is finished, which can significantly distort working capital figures. Sureties prefer percentage of completion, and using the wrong method can make your financials look weaker than they actually are.
• Not communicating with their bond agent: Your surety agent should understand your financial position and be able to advise you on strategies to optimize your balance sheet for bonding. If you are not having regular financial conversations with your agent, you are likely leaving capacity on the table.

How Surety Specialist Can Help

At Surety Specialist, we work with contractors at every stage of their bonding journey — from startup contractors applying for their first bid bond through the SBA Bond Guarantee Program to established firms managing multi-million dollar contract bond programs. We help you understand how sureties evaluate your financials, identify strategies to improve your working capital, and position your company for maximum bonding support.

With access to over 80 surety companies, we match your financial profile with the right surety — because different sureties weight working capital differently and have varying appetites for different contractor profiles. Contact us today or call 877-914-0909 to discuss your bonding program.