Surety Bond vs Letter of Credit: What's the Difference?

Surety bonds and letters of credit both serve as financial guarantees, helping to ensure that contractual obligations are met. However, each is designed to fit different situations and operate on different principles.

In this guide, we explore the differences between a surety bond vs letter of credit, and the situations in which you might need them.

 

Understanding Each Instrument

Before comparing surety bonds and letters of credit, it’s important to understand what each instrument has to offer on its own merits.

• Surety bonds are agreements between three parties: a surety (who guarantees performance), a principal (who must meet contractual or legal obligations), and an obligee (who is protected by the bond and compensated by the surety if the principal defaults).
• Letters of credit, or LoCs, are guarantees offered by banks to confirm that a seller or creditor will receive the funds they request from a buyer.

 

The Parties Involved

Surety bonds and LoCs both require the involvement of three specific parties.

Surety bond parties comprise:

• A principal, the party carrying out work that needs to post a bond to guarantee obligations.
• An obligee, the party paying for the work, such as a business or a government entity.
• A surety, the middle party that supplies a bond to the principal. The surety agrees to pay the obligee compensation if the principal defaults.

 

The parties involved in LoCs, meanwhile, are:

• An applicant, who is buying goods or services, who obtains the LoC.
• A beneficiary, the party that is selling the goods and who is protected by the LoC. They agree to ship goods, for example, once a letter of credit is submitted, and they provide proof of shipping.
• An issuing bank, the party that issues the LoC on behalf of the applicant. They guarantee that the beneficiary will receive the money requested, and will pay on the applicant’s behalf if they default.

 

In both cases, the surety and the issuing bank act as guarantors. However, sureties typically issue conditional guarantees — they investigate and confirm the principal actually defaulted before paying out, after underwriting and risk analysis upfront. Banks, by contrast, usually make unconditional guarantees, meaning they agree to pay beneficiaries on demand, without needing to prove default first.

 

Key Differences Between a Surety Bond and a Letter of Credit

The core differences between a surety bond vs letter of credit include coverage scope, impact on working capital, regulatory backing, and transferability and flexibility.

Here’s how the options break down across each of these four categories.

 

	Surety Bond	Letter of Credit
Coverage Scope	Generally covers the entire work across a contract or project and all its costs (e.g., performance bonds specifically cover how work is carried out)	Covers a set amount of money, i.e., for specific goods delivered at a certain value
Impact on Working Capital	Does not usually require any form of collateral, and provides flexibility to allocate capital across a project	Typically ties up available capital and requires collateral to set up
Regulatory Backing	Backed as insurance products and regulated at the state level	Governed by financial regulatory frameworks and banking laws
Transferability and Flexibility	Can adapt and transfer within project scope, provided it is agreed upon by the surety and obligee	Frequently rigid and dependent on a specific sale and amount of money agreed

 

How Claims Are Handled

Surety bond claims made by obligees are thoroughly investigated and verified before a surety pays the compensation demanded. LoCs, meanwhile, are paid on demand regardless of the nature of the claim or its validity.

Surety providers (such as our team at Lance Surety) investigate claims thoroughly to ensure that they are legitimate and that the associated claim is valid within agreements and expectations set. 

It is during this process that the principal is offered an opportunity, where appropriate, to meet the obligee’s expectations and potentially avoid paying out. They must pay full compensation due, however, if they are deemed liable.

In the LoC process, banks do not need to verify the legitimacy of a claim before paying beneficiaries. Principals cannot block or dispute the payment once it's demanded, even if they believe the claim is unfounded or the underlying obligation wasn't actually breached.

 

Cost and Financial Considerations

The costs of surety bonds are defined by the size of projects and contracts covered, the principal’s credit score and experience, and their available capital. Banks, meanwhile, assess LoC costs based on available assets and financial viability.

The typical surety bond cost, which varies depending on project specifics, can range between 1% and 10% of the bond amount.

Whether applying for contract bonds or otherwise, it’s wise to compare these charges before purchasing.

Banks charge applicants a percentage of the LoC value requested. This can vary depending on the bank as well as the full credit amount. In most cases, they will also require an applicant to submit collateral, such as by pledging assets or submitting cash or liquid securities.

LoCs may also carry renewal costs and extra contractual fees, meaning it is vital to read terms and conditions carefully.

What’s more, LoCs significantly impact working credit lines and working capital, because they directly impact available borrowing limits and lock up collateral. Surety bonds, meanwhile, are much more flexible, frequently requiring no collateral, and never drawing on bank borrowing limits.

Therefore, surety bonds are seen as more cost-effective across long-term obligations, because they don’t tie up collateral or restrict bank credit lines. Bond agreements also allow for more flexibility across projects, e.g., should changes be required. 

 

Term Length and Renewal

Surety bonds typically run for as long as a principal is required to meet obligations. LoCs, meanwhile, are usually tied to fixed calendar periods, typically for an initial year and then subject to certain renewal conditions.

Renewal and duration terms for surety bonds can vary, however, depending on their structures and requirements. For example, some may be continuous until canceled, while others must be renewed annually to ensure that coverage continues. Failure to renew in these cases can lead to coverage lapsing.

 

Advantages and Limitations

Both surety bonds and LoCs have specific advantages over the other, as well as specific limitations depending on the situation.

With surety bonds, there is:

• No impact on individual credit or bank borrowing
• Usually no need to submit collateral or tie up assets
• More flexibility if projects and contracts change
• Assurance of more stability for obligees, as character and experience are evaluated alongside credit
• Usually less to pay over time, depending on the length of a project

 

LoCs may be more beneficial if you require:

• A fast contract setup with minimal steps
• Guaranteed, on-demand payments
• Greater protection against another party’s bankruptcy or poor credit
• Simple, isolated terms that stand apart from a project

 

When to Use a Surety Bond vs a Letter of Credit

Surety bonds are the better choice when looking to guarantee performance during specific projects, such as public construction, or for commercial licensing (e.g., for auto dealerships). LoCs, meanwhile, are better suited to international trade deals, private commercial leasing, and utility guarantees.

Ultimately, the specific requirements of the obligee or beneficiary will dictate which instrument is the best choice.

If they require instant access to money, need control of funds, and require protection against the applicant or principal going bankrupt, a letter of credit is the best choice.

If, however, their requirements revolve around project performance and completion, and there is a greater need to assess industry experience and character, a surety bond is ideal.

You don’t have to work this out on your own if you’re looking into how to get a surety bond. Partnering with a specialist surety agency like Lance Surety means you’ll have access to expert advice to guide you to the right instrument for your project.

 

FAQ

Are there situations where an obligee must accept a surety bond over a letter of credit?

Obligees usually won’t need to accept a surety bond over an LoC, unless the contract’s original terms stipulate that this has to be the case.

Does the cheaper option between a surety bond and a letter of credit depend on credit score?

Yes, the costs of surety bonds and LoCs are tied to your credit score and ability to repay. However, the cost of surety bonds also depends on other factors, such as your industry experience, provable reliability, and work capacity.

Do surety bonds protect subcontractors?

Yes, specifically, payment bonds can protect subcontractors, ensuring that they are paid in full for any material and labor costs, for example, if a project’s owner defaults.

Can a principal dispute a surety bond claim filed against them?

Yes, provided they have evidence to dispute an obligee’s decision, and are willing to report directly to the surety. For example, if an obligee claims that work was not submitted within the timescales requested, a principal may have proof of emails sent.

Are letters of credit used in construction?

Yes, LoCs can be used in construction, typically to act as financial safety nets and to guarantee that suppliers and subcontractors will be paid as they expect.

 

Sources

Lance Surety. (N.d.). Performance Bonds. Lance Surety. Retrieved July 24, 2026, from
https://www.lancesuretybonds.com/contract-bonds/performance-bonds 

Lance Surety. (N.d.). How Much Does a Surety Bond Cost in 2026?. Lance Surety: Learn. Retrieved July 24, 2026, from
https://www.lancesuretybonds.com/learn/surety-bond-cost 

Lance Surety. (N.d.). Contract Bonds. Lance Surety. Retrieved July 24, 2026, from
https://www.lancesuretybonds.com/contract-bonds 

Lance Surety. (N.d.). How to Get a Surety Bond. Lance Surety. Retrieved July 24, 2026, from
https://www.lancesuretybonds.com/learn/how-to-get-surety-bond