Petty cash is like the rhythm section of your business finances - it might not be the star of the show, but without it, the whole performance falls apart. From grabbing emergency printer ink before a client presentation to paying the parking meter during a site visit, petty cash keeps the small stuff moving so you can focus on the big picture.
Petty cash is a small amount of physical currency that a business keeps on hand to cover minor, everyday expenses. The term "petty" refers to the small monetary value of individual transactions - typically ranging from $30 to $300, depending on the size and needs of your business. Overall petty cash funds are generally maintained between $50 and $500 for most small businesses.
In accounting terms, petty cash is classified as a current asset on your balance sheet. It is not treated as an expense account - it represents actual cash owned by your business, held securely in a locked cash box or drawer, and recorded accordingly.
The most widely used method for managing petty cash is the imprest system, which operates as follows:
This creates a clean, traceable audit trail - and keeps the ATO very much on side.
Petty cash is designed to handle the small, spontaneous expenses that don't warrant a formal purchase order or credit card transaction. Common examples include office supplies (like batteries, pens, and emergency printer cartridges), postage, urgent shipping costs, parking fees, tolls, public transport fares, staff refreshments, small hardware items for minor repairs, greeting cards, and payments to cash-only vendors.
It is important to note that petty cash is not for personal purchases, regular recurring expenses, or random ATM withdrawals.
Setting up a well-structured petty cash system involves a few key steps:
Most small businesses in Australia establish a petty cash fund between $100 and $500. Consider your business size, frequency of small cash purchases, and industry requirements.
Only one person should manage the petty cash fund. This custodian handles disbursements, collects receipts, maintains the log, reconciles the fund regularly, and requests replenishments.
Written policies outline maximum transaction limits, approved expense categories, documentation requirements, access controls, and replenishment procedures.
Store petty cash in a locked cash box, drawer, or safe, with keys accessible only to the custodian. This minimizes security risks and potential fraud.
Reconciliation should happen at least monthly. Count the physical cash, total all receipts and vouchers, and verify that everything adds up to the original float amount. Investigate any discrepancies immediately.
Proper recording is crucial. When setting up the fund, record a debit to Petty Cash and a credit to the Bank Account. Day-to-day transactions are documented through vouchers and receipts. Upon replenishment, expenses are formally recorded with appropriate debit entries for each expense category, ensuring every dollar is correctly categorized in the general ledger.
The ATO requires that all petty cash records, including receipts, vouchers, and logs, be maintained for a minimum of five years. Documentation must include the original receipt or tax invoice with the supplier's ABN, the date, and a clear business purpose. Any ATM or undocumented cash withdrawals will be classified as personal drawings and are not eligible as tax deductions.
Despite digital alternatives such as prepaid business debit cards and expense management apps, petty cash remains essential for many businesses, especially when dealing with cash-only vendors. However, its use should be limited to situations where digital payments are not feasible. A well-managed petty cash system, often integrated with modern cloud accounting tools, remains a reliable backup for covering small, immediate expenses.
A properly maintained petty cash system saves time, minimizes operational friction, ensures accurate accounts, and keeps you compliant with ATO standards. Establish a fixed float, appoint a responsible custodian, document every transaction, reconcile regularly, and avoid misclassifying cash withdrawals to keep your business finances in perfect harmony.
Petty cash is a small fund of physical currency kept on hand by a business to cover minor, day-to-day expenses, typically between $50 and $500. It is used for convenience, speed, and accessibility, especially for transactions where formal payment processes are impractical.
Most small Australian businesses establish a petty cash fund between $100 and $500. The appropriate amount depends on the business size, frequency of small cash purchases, and industry-specific needs.
Yes, the ATO requires that every petty cash transaction is accompanied by proper documentation, such as a receipt or tax invoice showing the supplier's ABN, the date, and a clear business purpose. If a receipt isn’t available, a signed petty cash voucher must be used.
Petty cash records, including receipts, vouchers, and reconciliation logs, must be retained for at least five years. Digital copies are acceptable under ATO ruling TR 2023/5.
No, ATM cash withdrawals cannot be claimed as petty cash expenses. Without a properly maintained petty cash system that includes a fixed float, secured storage, and proper documentation, such withdrawals are classified as personal drawings and are not tax deductible.
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