Understanding CommBank Bank Guarantees for Business

How to Apply for and Manage a CommBank Bank Guarantee

Olesya Krasavtseva
Fact-checked by Olesya Krasavtseva
Content Editor at Prostobank Consulting Prostobank Consulting Logo
Updated: 01.09.2026
Table of Contents

Understanding Bank Guarantees

A bank guarantee is a formal commitment where Commonwealth Bank (CommBank) promises to pay a specific amount to a third party, such as a landlord or supplier, if your business fails to meet its contractual obligations. This provides security to the recipient without requiring you to tie up your own liquid cash as a security deposit.

Business owners typically use these guarantees to secure commercial leases, fulfill government tender requirements, or ensure performance in supply contracts. Because this involves the bank taking on financial risk, the approval process requires a detailed assessment of your business’s financial health and current credit standing.

Key Information and Requirements

Category Details
Management Channels NetBank for Business, Branch, or Relationship Manager
Typical Processing Time Generally 5 to 10 business days for standard assessments
Eligibility Active CommBank business customers with a valid ABN
Key Requirements Business financial statements, signed contract details, collateral security

Step-by-Step Application Guide

Here is how you typically navigate the process to request a new bank guarantee facility:

1. Consult your CommBank Relationship Manager or visit a business banking centre to discuss your specific guarantee requirements.

2. Provide the draft contract, lease agreement, or tender document that specifies the need for a bank guarantee.

3. Submit the required business financial statements and any security documentation requested by the lending team.

4. Wait for the bank's internal assessment team to review your business's capacity to support the guarantee liability.

5. Once approved, sign the formal facility offer and pay the required establishment and ongoing maintenance fees.

6. The bank will issue the guarantee document directly to you or the beneficiary as specified in your agreement.

Troubleshooting Common Access Issues

NetCode SMS Not Arriving for Business Portal
Cause: Mobile network reception delays or an outdated contact number registered on your business profile can prevent the security code from arriving.
Fix: Restart your mobile device to refresh the network signal and request the code again after a few minutes.
Fallback Action: Call the Business Banking support line on 13 19 98 to verify your identity and confirm your registered contact details.

Page Timing Out in Business Portal
Cause: Digital banking platforms terminate inactive sessions to protect commercial data, which often happens if you spend time reviewing complex guarantee terms.
Fix: Clear your web browser's cache and cookies, then log back into NetBank for Business to resume your request.
Fallback Action: Try using a different web browser or the CommBank business app if the desktop environment continues to encounter loading errors.

Account Access or Entity Locked
Cause: Entering incorrect administrator credentials too many times triggers a security freeze to protect your business's financial infrastructure.
Fix: Wait 15 minutes for the temporary soft lock to clear before trying to log in again with your correct credentials.
Fallback Action: Visit a business banking branch with physical photo ID and your business registration documents so a banker can manually unlock your profile.

Pro-Tip: Before applying, check that the beneficiary (the landlord or supplier) accepts the specific wording of CommBank’s standard guarantee format. Providing the required beneficiary wording to your banker upfront typically prevents delays caused by drafting legal amendments later in the process.

Frequently Asked Questions

What happens if the beneficiary calls on the guarantee?
If a landlord or supplier presents a valid claim against your bank guarantee, CommBank is obligated to pay the funds to them according to the terms of the document. The bank essentially acts as your guarantor, meaning they will pay the beneficiary first and then seek repayment from you. What this means is that the bank treats this payout as a debt that you must clear under your facility agreement. Your practical next step is to ensure your business maintains the required credit limit and cash flow to cover the guarantee amount if a claim occurs.

Can I change the amount of an existing guarantee?
As business needs evolve, you may need to increase or decrease the guarantee amount—for example, if you negotiate a new lease or complete a stage of a project. The bank must issue a new document or formally amend the existing one to reflect the change. This process requires a fresh assessment of your business's credit position to ensure you can support the revised liability. A limitation here is that you cannot simply change the amount without bank approval. Your practical next step is to contact your Relationship Manager to request a variation of your guarantee facility.

Is the fee for a bank guarantee tax-deductible?
Businesses often look for ways to optimize their tax position regarding bank costs. Generally, the fees paid to CommBank for establishing and maintaining a bank guarantee are considered business expenses and are usually deductible for income tax purposes. However, the nature of these deductions depends on the specific project or lease the guarantee secures. A notable exception is if the guarantee is tied to a capital asset or long-term lease, where tax treatment may differ. Your practical next step is to consult with your accountant or tax advisor to confirm how these specific fees should be recorded in your financial accounts.

Official Bank Information

Commonwealth Bank (CBA)

Support: 13 22 21

SWIFT Code: CTBAAU2S

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Credit limit range: 400 dol to 1500 dol No physical card provided (digital only) Monthly minimum repayments: 40 dol or less Access to CommBank Yello Cashback Offers No additional cardholders allowed Does not earn Awards points

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