​In construction, EPC, infrastructure, renewable energy and government tenders, financial security is often a non-negotiable requirement. Contractors may be asked to furnish bid security, performance security, advance-payment security or retention-related guarantees before they can participate in or execute a project.

For decades, bank guarantees have been the standard solution. They are familiar to project owners, widely accepted and trusted across the contracting ecosystem. However, they also use up a contractor’s non-fund-based banking limits—limits that are equally important for working capital, procurement, equipment finance, mobilisation and day-to-day project execution.

This is where insurance surety bonds are gaining attention.

They are not designed to replace bank guarantees entirely. Instead, they offer contractors another way to meet tender and contractual security requirements while preserving banking capacity for operational needs.

 What Is an Insurance Surety Bond?

An insurance surety bond is a financial guarantee issued by an insurance company on behalf of a contractor or business. It assures the project owner that the contractor will meet its contractual obligations.

It involves three parties:

• Principal: The contractor or bidder responsible for fulfilling the contract

• Obligee: The project owner, government department or procuring entity receiving the protection

• Surety: The insurance company issuing the bond

For example, when a contractor wins an EPC or infrastructure contract and must submit performance security, it can approach an insurer for a surety bond instead of relying only on a bank guarantee.

Before issuing the bond, the insurer evaluates the contractor’s financial strength, project track record, management capability, cash flows, ongoing obligations, technical competence and overall risk profile.

In effect, the insurer is stating: “We have assessed this contractor and are willing to stand behind its contractual commitment.”

 Why Bank Guarantee Capacity Matters

Contractors rarely need only one guarantee. Across multiple projects, they may require:

• Bid security or EMD at the bidding stage

• Performance security after award of contract

• Advance-payment guarantees where mobilisation advances are received

• Retention bonds to unlock retained payments

• Maintenance or defect-liability bonds after project completion

When these requirements accumulate across several projects, they can consume a significant share of the contractor’s banking limits.

This creates a practical problem. A contractor may have a strong order book, proven execution capability and new project opportunities, but may be unable to submit another bank guarantee because its available limits are already committed.

At the same time, banks are also expected to support working capital, supplier payments, procurement, payroll, machinery, logistics and mobilisation. If guarantee limits are fully utilised, a growing contractor may have to delay or avoid bidding for otherwise viable projects.

Insurance surety bonds can help address this capacity constraint.

How Surety Bonds Support Tender Participation

Consider a contractor handling several live infrastructure projects. The company wins another contract but needs to furnish performance security before mobilising at site. Its bank limits are already substantially utilised by existing guarantees.

The contractor may have the technical expertise, manpower and project experience to deliver the new job. The constraint is not execution capability—it is guarantee capacity.

If the tender permits an insurance surety bond and the insurer approves the contractor after underwriting, the contractor may use the surety bond for the required security. This can preserve bank limits for working capital and project execution.

For project-based businesses, this flexibility can be significant. It can help contractors maintain cash-flow headroom, manage more projects and avoid losing opportunities purely because bank guarantee limits are exhausted.

Bank Guarantees and Surety Bonds

Both bank guarantees and insurance surety bonds protect the project owner against contractor default. However, they assess risk differently.

Banks typically focus on the contractor’s creditworthiness, collateral, borrowing record and available guarantee limits.

Insurers, while also reviewing financial strength, may place deeper emphasis on the contractor’s ability to execute the project successfully. Their assessment can include:

• Past experience in comparable projects

• Technical and management capability

• Strength of the order book

• Current project commitments

• Working-capital availability

• Cash-flow forecasts

• Profitability and leverage

• Dependence on a few major clients

• History of disputes, delays, claims or project losses

The key question is not only whether the contractor can repay a claim. It is whether the contractor has the systems, resources and capability to complete the project as promised.

Where Surety Bonds Can Be Used

Insurance surety bonds may be relevant at different stages of the tender and project lifecycle, subject to the tender terms and the procuring entity’s acceptance.

• Bid bonds or bid security: To demonstrate that the bidder is serious and will honour the bid if selected

• Performance bonds: To secure performance of the contract after award

• Advance-payment bonds: To assure proper use or recovery of advance funds

• Retention bonds: To release a portion of retention money while maintaining protection for the project owner

• Maintenance bonds: To cover obligations during the defect-liability or maintenance period

In India, insurance surety bonds have been recognised as an acceptable form of bid security and performance security in central government procurement under the amended General Financial Rules. However, contractors should always check the exact wording of the individual tender before arranging a surety bond. Acceptance may vary based on the procuring entity, project type, security requirement and prescribed tender format.

What Tender Bidders Should Check

A surety bond should never be arranged on the assumption that it will automatically be accepted in place of a bank guarantee. Before proceeding, bidders should review the tender document carefully.

Key checks include:

• Does the tender explicitly permit an insurance surety bond?

• Is the bond acceptable for bid security, performance security or both?

• Is there a prescribed wording or format for the security instrument?

• What is the required validity period?

• Who must be named as the beneficiary or obligee?

• What are the invocation and claim conditions?

• Does the tender require a specific insurer category or eligibility condition?

• Does the tender mention only a bank guarantee, requiring clarification during the pre-bid stage?

If the tender security clause refers exclusively to a bank guarantee, contractors should seek written clarification from the procuring authority during the pre-bid period. They should not assume that a surety bond will be accepted merely because another government department, PSU or project authority has accepted one.

Benefits for Contractors

The most important advantage of insurance surety bonds is flexibility.

Where they are accepted, contractors may be able to use surety bonds alongside bank guarantees and distribute their guarantee requirements across more than one financial partner.

This can help businesses:

• Preserve bank limits for working capital and operational financing

• Improve capacity to participate in multiple tenders

• Support procurement, supplier payments and project mobilisation

• Diversify financial-security sources

• Reduce dependence on a single bank relationship

• Pursue larger or additional contracts without immediately seeking enhanced bank limits

• Improve overall capital efficiency

However, a surety bond is not a shortcut around weak financial controls. Insurers will still expect credible financial statements, realistic cash-flow projections, project-level data, sound governance and a proven execution record.

A contractor with poor controls, excessive project commitments or weak cash flows may find it difficult to obtain either a bank guarantee or a surety bond.

What Insurers Evaluate

Surety underwriting is different from conventional insurance underwriting. It requires insurers to understand the commercial and technical realities of contracting.

High turnover alone does not necessarily indicate low risk. A company may report strong revenues but still face pressure from thin margins, delayed receivables, cost overruns, excessive dependence on one customer or an overloaded project pipeline.

A robust surety assessment looks beyond headline revenue. It considers:

• Actual profitability and margin quality

• Debt and contingent liabilities

• Project execution capability

• Cash-flow resilience

• Exposure to delayed client payments

• Current order-book commitments

• Contractual risk allocation

• Management quality and internal controls

• Past defaults, disputes or claims

• Ability to absorb project delays or cost escalation

The purpose is to identify contractors that can execute projects successfully—not merely those that can provide collateral.

Are Surety Bonds Replacing Bank Guarantees?

No. Bank guarantees are deeply embedded in the contracting ecosystem and will remain important for public and private projects.

The more practical question is not whether one instrument is better than the other. It is how contractors can use both instruments strategically.

A contractor may continue to use bank guarantees for some tenders while using insurance surety bonds for eligible projects where preserving banking limits is particularly valuable. This blended approach can improve financial flexibility without compromising the project owner’s need for security.

The Road Ahead

Insurance surety bonds are still developing in India. Wider adoption will depend on greater awareness among contractors, project owners, government agencies, lenders and insurers.

Several factors will shape their growth:

• Clear tender-level acceptance and standardised security wording

• Greater awareness among bidders and procuring entities

• Strong underwriting capability within insurance companies

• Efficient and credible claims handling

• Better understanding of project and contract risks

• Consistent acceptance across suitable public-sector and private-sector projects

As India’s infrastructure, renewable energy, transport, power and industrial investment pipeline expands, contractors will require more financial capacity to bid for and execute projects. Bank guarantees alone may not always provide sufficient room to support this demand.

A Smarter Approach to Tender Security

Insurance surety bonds are not a substitute for sound financial management, strong project controls or responsible bidding. They are a complementary financial-security tool.

For eligible tenders and financially capable contractors, they can help preserve bank guarantee capacity, support working-capital planning and create room to pursue additional opportunities.

The future is unlikely to belong solely to bank guarantees or surety bonds. It is more likely to favour contractors that understand when and how to use both.

For tender bidders, the key takeaway is simple: review every tender’s security clause carefully, confirm whether insurance surety bonds are accepted, compare the full commercial terms, and choose the instrument that best protects both project delivery and financial capacity.