Surety Bonds

If you’re a builder or contractor delivering projects for principals, you already know the drill: almost every construction contract requires security — usually 5% of the contract value, often as two 2.5% instruments, one released at practical completion and one at the end of the defects liability period.

For decades, the default answer has been a bank guarantee. But there’s a growing problem with that default: banks don’t issue guarantees for free. They want security — cash on term deposit, a mortgage over property, or a General Security Agreement over everything your business owns. For a growing builder, that means real working capital locked away doing nothing, sometimes for years, while the defects liability period runs its course.

Surety bonds solve that problem. They’re issued unsecured, they’re accepted by government and most major principals across Australia, and for eligible builders they can release hundreds of thousands — sometimes millions — of dollars back into the business.

Here’s how the two instruments compare, who qualifies for surety, and how to decide which suits your business.

What Is a Bank Guarantee?

A bank guarantee is an unconditional, irrevocable undertaking from your bank to pay the beneficiary (usually the project principal) on demand, up to the face value of the guarantee. The principal doesn’t need to prove you defaulted — they simply present the guarantee and the bank pays.

The bank then recovers from you. Which is why banks secure guarantee facilities heavily:

• Cash cover — often 100% of the guarantee value held on term deposit
• Property security — a mortgage over business or personal property, frequently the family home for smaller builders
• A General Security Agreement (GSA) — a charge over all present and future assets of the business
• Director guarantees — personal liability for the directors

The guarantee itself is a well-understood, universally accepted instrument. The cost is what sits behind it: capital you can’t use to fund projects, take on more work, or absorb a slow-paying principal.

What Is a Surety Bond?

A surety bond (also called a contract performance bond) does exactly the same job. It’s an unconditional, irrevocable, on-demand undertaking to pay the beneficiary — issued not by a bank, but by a specialist surety provider backed by a major insurer or global reinsurer.

The wording and legal effect are materially identical to a bank guarantee. When the beneficiary presents the bond, the issuer pays on demand — there’s no insurance-style claims assessment, no proving fault. In fact, it’s important to understand that despite being arranged through insurance channels, a surety bond is not an insurance policy. It’s a financial security instrument, and the surety has full recourse to your business if a bond is called.

The critical difference is what secures it:

• No tangible security. Typically no cash cover, no property mortgage, no GSA.
• A Deed of Indemnity and Guarantee — the corporate group indemnifies the surety
• Director guarantees — as with the bank

That’s it. The surety relies on the financial strength of your business rather than taking your assets as collateral. Leading surety paper in the Australian market is backed by reinsurers rated AA- by S&P — on par with the major banks — and is accepted by corporate principals, utilities, and government at federal, state and local level, meeting the Treasury guidelines of all state governments.

Where a principal’s contract specifically demands a bank instrument, major surety providers can also arrange bank-fronted bonds — a guarantee issued by a bank such as ANZ or HSBC, backed by your surety facility — so the capital benefit is preserved even on the strictest contracts.

Side-by-Side Comparison

Who Qualifies for a Surety Facility?

Because the surety takes no tangible security, underwriting is rigorous. Providers are lending against your balance sheet and track record, so the qualification criteria in the Australian market typically look like this:

• Turnover of at least $20 million per annum over the last three years
• At least three consecutive years of profitability — one loss year is a genuine problem
• Net tangible assets of $3 million or more — after stripping out goodwill, intangibles and doubtful related-party loans
• Positive operating cash flow and positive working capital
• Demonstrated capital retention — profits staying in the business, not swept out to directors each year
• Professional financial management — monthly management accounts, project-level reporting, ideally reviewed at board level
• The main contracting entity is not a trust — trustee structures are generally excluded
• A solid track record of completed projects delivered without major disputes

Two things are automatic declines with most providers: an active payment arrangement with the ATO (or any financier or supplier), and involvement in speculative property development. If either applies to your business, address it before applying rather than discovering it mid-underwriting.

Facilities typically start from around $2–3 million and scale well beyond $100 million for larger contractors, with facility size driven primarily by your net tangible asset position and the peak value of bonds you’ll have on issue at any one time.

The Mistake Most Builders Make When Sizing a Facility

Here’s something we see constantly: builders estimate their facility requirement off total contract value or annual revenue. That’s not how it works.

What matters is your peak simultaneous exposure — the maximum face value of bonds on issue at any single point in time. And that includes old bonds that have expired but haven’t physically been returned by the principal, which still count against your facility limit.

Before approaching a surety provider, build a bond register from your order book: every current security instrument, its face value, its expected release date, plus the bonds your pipeline will require over the next 12 months. Ask for too small a facility and you’ll be back requesting increases mid-year; ask for too much and you’ll pay line fees on capacity you never use.

This is exactly the kind of contract-level analysis Silverback brings to the process. Our director Petara Tanuvasa worked as a contract administrator for major Australian builders before becoming a broker — he’s managed retention, security and defects liability obligations from inside a construction business, which means your bond register gets built the way an estimator and CA would build it, not the way a generalist broker would.

What Does a Surety Bond Cost?

Pricing is set per facility based on your financial strength, sector and bond profile, so published “typical rates” are rarely meaningful. Broadly, you should expect an annual rate applied to bonds on issue, and in many cases the all-in cost compares favourably once you account for what the bank guarantee really costs you: facility fees, plus the opportunity cost of cash locked on deposit or property that could otherwise support borrowing.

The right comparison isn’t fee versus fee — it’s the total cost of each instrument including the capital it ties up. That calculation is different for every builder, and it’s one we work through with clients before recommending either path.

The Application Process

1. Pre-screen — we check the knockout criteria (ATO arrangements, trust structure, profitability history) before anything is lodged
2. Information pack — capability statement, group structure chart, three years of financials, year-to-date management accounts, banking facility summary, and an order book report
3. Expression of Interest — the surety issues indicative terms including facility limit and pricing
4. Full underwriting and term sheet
5. Legal documentation — the Deed of Indemnity and director guarantees
6. Facility live — individual bonds can then usually be drafted and issued same-day through the provider’s online platform

For an established, well-run builder, moving from first conversation to an active facility typically takes four to eight weeks.

So Which Should You Choose?

Keep bank guarantees if your security requirements are small and occasional, your bank facility is unsecured or lightly secured, or your business doesn’t yet meet surety qualification thresholds.

Look seriously at surety if you’re turning over $20 million or more with a solid balance sheet, you have meaningful capital tied up behind guarantees, your bank line is constraining your ability to tender, or you simply want your bank headroom back for growth funding. Many established builders ultimately run both — a surety facility for the bulk of their bonding, with the bank as backup.

Frequently Asked Questions

Thinking about replacing your bank guarantees? We’ll pre-screen your eligibility, build your bond register, and manage the application end to end. Get a quote or call Petara on 0410 152 835. If your projects also involve design responsibility, see our guide to professional indemnity for NSW builders under the DBP Act.

The information provided is general advice only and has been prepared without taking into account your particular objectives, financial situation or needs. Silverback Insurance Pty Ltd (CAR 1283436 | ABN 74 643 561 746) is a Corporate Authorised Representative of Australian Broker Network Pty Ltd (AFSL 304 139).