Last Updated: July 26, 2026
What role does collateral play in surety bonds? In this guide we walk through the types of collateral sureties accept, when collateral is required, how and when it is released, what happens if you change sureties, and why collateral shows up on riskier bonds. If you already know you need a bond and want to move fast, call us at 800-333-7800 or get a free quote online. We have been writing bonds since 1971 and can walk you through your collateral options in plain English.
Collateral is a security deposit the Principal (the bond applicant) provides to the Surety (the bond company) so a bond that would otherwise be difficult to approve can be issued. It reduces the surety’s risk and exposure, which makes supporting the bond more comfortable for the underwriter. When a surety asks for collateral, it is weighing four things: the acceptable type of collateral, the required amount, the timing of its release, and how the collateral is protected.
Here is the reassuring part. Collateral is usually a last resort, not a first step. Sureties generally try to exhaust other options first. The first move when qualifying an applicant is almost always a review of the credit report, and applicants with stronger credit usually see better rates and lighter collateral requirements. Depending on the bond, an underwriter may also review financial statements and industry experience before deciding whether collateral is needed at all.
The Types of Surety Bond Collateral
Sureties accept several forms of collateral. Here are the ones you are most likely to encounter, from the most common to the least.
Cash
Cash is the most common form of surety bond collateral, and the most secure. Usually the Principal wires funds from their bank to the surety’s collateral account, though sometimes a cashier’s check is used instead. The upside is that cash is fast and simple, and every party understands it. The downside is opportunity cost: money sitting as collateral is money you are not using elsewhere.
Irrevocable Letter of Credit (ILOC)
An ILOC, sometimes called a Standby Letter of Credit, is often considered the safest form of collateral after cash. A commercial bank issues the letter based on the applicant’s financial standing, and it acts as a private contract between the bank and the surety, with the surety as the beneficiary. On demand, the bank pays the surety up to the face amount of the letter, and that payment is documented as a loan to the applicant. From the surety’s point of view an ILOC is about as secure as cash, because it allows immediate recovery if a claim or loss occurs. The catch is qualifying for one: the applicant needs a strong banking relationship, and banks want close to complete certainty, which many applicants find hard to reach. There is also a bankruptcy advantage worth knowing. Most other forms of collateral are subject to the bankruptcy courts, where under Section 547 of the Bankruptcy Code transfers made within 90 days before a filing can be clawed back for creditors. An ILOC generally sits outside that risk. If you want to go deeper, see our full guide to irrevocable letters of credit in surety bonding.
Certificates of Deposit and Investment Accounts (Assignment of Collateral)
Certificates of deposit and non-retirement investment accounts, the stocks, bonds, mutual funds, and ETFs many people already hold, can often serve as collateral without cashing them out. This is done through a process called an assignment of collateral, also known as a collateral assignment. Instead of liquidating the asset, you sign an assignment that pledges it to the surety as security. The bank or brokerage that holds the asset acknowledges the assignment and agrees not to release it or let you withdraw the funds without the surety’s consent. If a claim hits the bond and you do not reimburse the surety, it can reach the assigned asset up to the collateral amount. Once the bond is exonerated, the surety releases the assignment and full control returns to you.
The advantage is that your money keeps working. A CD keeps earning its interest, and your investments stay in the market, while they back the bond. A few practical notes. FDIC-insured CDs are common and straightforward, and the assigned balance should stay within FDIC coverage limits so that a bank failure could not drop the collateral below what the surety requires. Because markets move, a surety will usually want an investment account valued somewhat above the required collateral amount, so there is a cushion if values dip.
Real Estate and Other Fixed Assets
Sureties may accept real property and other fixed assets as collateral, though it is a slower and more involved option. The surety places a lien on the property until the bond is exonerated (finished), then files a Full Reconveyance to dissolve the lien. As a general guideline, we look for property that is free of liens and holds equity worth at least 2.5 times the bond amount. That cushion protects the surety against changing property values and the costs of ever having to rely on the real estate. On top of that, the property needs a professional appraisal, adequate insurance, and clear title, and the underwriter will work through the usual questions: who owns it, how much equity is really there, whether it sits in a trust, and whether any other encumbrances exist.
Retirement Accounts (401(k), IRA)
Retirement accounts are a common question and a firm no. The IRS forbids using retirement accounts such as 401(k)s and IRAs directly as collateral. If you want to tap retirement funds, the IRS route is either a loan from the account or a withdrawal, and a withdrawal may trigger an early withdrawal penalty. Talk to a tax advisor before going down that road.
Automobiles and Personal Effects
Automobiles and personal property are generally not acceptable collateral for serious surety bonds. There are too many open questions: Who is responsible for damage? Where is the item stored, and who pays for that? What if appraisals are disputed, or the item is stolen, or ownership is unclear? For those reasons, personal effects are treated as substandard collateral in most cases.
Other Documents the Surety May Require
Collateral rarely travels alone. Sureties may issue collateral receipts in the Principal’s name that spell out if and when the collateral will be returned. They may also require a pledge agreement in addition to a general indemnity agreement, which secures repayment of the obligation and gives the surety sole decision-making discretion until it has acceptable evidence that it is released from all liability under the bonds. Between them, the indemnity agreement, collateral receipts, and pledge agreements define the exact conditions for releasing your collateral.
When Is Collateral Released?
A surety will not release collateral until it is cleared of all bond obligations, and the timing is a common point of friction. In construction or fiduciary and probate matters, a surety generally will not release half the collateral just because half the work is done. The obligation has to be completed and has to meet the conditions in the bond, so the surety holds the full amount until the end. “The end” is often later than applicants expect. On a construction project with a maintenance bond, for example, the surety may hold collateral until the maintenance period closes, and it can remain equally obligated through the lien period, which can run 90 days after the work is completed.
What Happens If You Change Sureties?
Unwinding a collateral relationship can be tricky, especially once a series of bonds (bid, performance, payment) has already been issued. It is usually easier to let the collateral run its course with your existing surety than to move to a new non-collateral surety mid-stream. Even if a new provider starts writing your bonds, the collateral stays in place until the original bond obligations are exonerated. That reality can be a deterrent, so it is worth factoring into any decision to switch.
Why Collateral May Be Required
For riskier bonds, sureties will often ask for collateral. Think of it as a last-resort form of security, something you would generally prefer to avoid, but that can be the key to getting approved when the file is thin. You might have a weak business financial statement but strong outside resources, for instance. Common situations where a surety leans toward collateral include onerous bond conditions, an unsupportable underlying obligation, limited financial strength, an unusually long obligation period, or a bond with no cancellation provision. A good underwriter will look at whether a collateral requirement actually makes it impossible for you to take on the project, and will work with you where it can.
Frequently Asked Questions
What is surety bond collateral?
Collateral is a security deposit the bond applicant (Principal) gives the surety to reduce the surety’s risk so a bond can be approved and issued. It is usually required only on higher-risk bonds, and it is returned once the bond obligation is fully satisfied.
What types of collateral do sureties accept?
The most common is cash, followed by an irrevocable letter of credit (ILOC). Certificates of deposit and non-retirement investment accounts can often be used through an assignment of collateral, and real estate is possible when there is enough lien-free equity. Retirement accounts and personal effects like automobiles are generally not accepted.
Is cash the most common form of collateral?
Yes. Cash is the most common and most secure form of surety bond collateral, usually sent by wire transfer. An ILOC is the next most common and is treated as nearly as secure as cash.
Can I use my house as collateral for a surety bond?
Sometimes. Sureties may accept real estate, but it is slower and more involved. As a general guideline we look for property that is free of liens with equity worth at least 2.5 times the bond amount, plus a professional appraisal, adequate insurance, and clear title. The surety places a lien on the property until the bond is exonerated.
Can I use a retirement account or investment account as collateral?
Retirement accounts such as 401(k)s and IRAs cannot be used directly, because the IRS forbids it. Non-retirement investment accounts and CDs are different: those can often be pledged through an assignment of collateral without liquidating them. If you need retirement funds specifically, the options are a loan or a withdrawal, which may carry a penalty, so check with a tax advisor first.
When do I get my collateral back?
Only after the surety is cleared of all bond obligations. Sureties hold the full amount until the obligation is complete, and on construction bonds that can extend through a maintenance or lien period after the work is finished.
Do I always have to post collateral to get bonded?
No. Collateral is a last resort, not a default. Sureties usually look at credit, financials, and experience first, and many bonds are issued with no collateral at all. Call us at 800-333-7800 and we will tell you where you stand.
Talk to a Surety Expert About Your Collateral Options
Collateral does not have to be a mystery, and it often is not even necessary. Surety Bond Authority has been writing bonds since 1971, and we will look at your situation honestly and find the least burdensome path to getting you bonded. Call us at 800-333-7800 or reach out through our contact page for a free, no-obligation review of your options.
