A petty cash fund is a separate checking account that holds small amounts of money for everyday business expenses
A petty cash fund account is a dedicated checking account—usually at the same bank as your main business account—that holds cash reserved for small, routine purchases. Instead of writing checks or using a credit card for a $15 office supply run or a $8 coffee delivery, employees draw from petty cash. The account stays separate so you can track these small expenses without mixing them into your primary operating account.
The money in petty cash typically covers expenses under a set limit—often $25 to $100 per transaction, though that varies by business policy. Common uses include postage, minor repairs, cleaning supplies, employee reimbursements, and emergency supplies. Because the amounts are small and frequent, a separate account makes reconciliation simpler: you know exactly how much should be there, and you can spot discrepancies quickly.
Petty cash accounts work differently from regular checking accounts in one key way: they are not meant for regular deposits and withdrawals by many people. Instead, one or two designated employees manage the fund, and others request cash from them. This creates a clear chain of responsibility and makes it easier to audit where money went.
Key Takeaways
- A petty cash fund account is a separate checking account that holds small amounts of money for routine, low-dollar business expenses.
- The account typically has a spending limit per transaction—often $25 to $100—and is managed by one or two designated employees.
- Petty cash covers expenses like postage, minor supplies, and employee reimbursements that would be inefficient to process through your main account.
- The account must be reconciled regularly, usually weekly or monthly, to ensure the balance matches the amount of cash on hand plus documented expenses.
How petty cash accounts differ from your main business checking account
Your main business checking account handles payroll, vendor payments, customer deposits, and other large or regular transactions. A petty cash account is the opposite: it handles many small transactions, each one minor enough that processing it through the main account would create clutter and slow down reconciliation.
The main account typically has multiple authorized users—owners, managers, accountants—and generates a long monthly statement. A petty cash account has one or two custodians who control access, and the statement is usually short and predictable. You fund the petty cash account by transferring money from your main account, then employees request cash from the custodian rather than directly from the bank.
Because petty cash is physical currency, not a debit card or check, it creates a natural spending limit. An employee cannot spend more than what is in the box. This makes it harder to overspend on small items compared to a credit card or debit card with no daily cap.
Setting up a petty cash account and choosing a starting balance
To set up a petty cash account, open a separate checking account at your bank under your business name. You do not need a different bank—most businesses keep petty cash at the same institution as their main account for easier transfers. Tell the bank it is a petty cash account; some banks offer accounts with lower fees for this purpose, though many charge the same rate as a standard business checking account.
The starting balance depends on your business size and spending patterns. A small office might start with $200 to $500. A larger operation or one with frequent small expenses might start with $1,000 to $2,000. The goal is to have enough cash on hand so the custodian does not run out before the next restock, but not so much that you are tying up money that could be earning interest or paying down debt.
Once the account is open, transfer your starting balance from your main account. Document this transfer in your accounting records as a movement between accounts, not as an expense. The petty cash account is now funded and ready for use.
Managing daily petty cash requests and keeping records
When an employee needs cash from petty cash, they request it from the custodian and receive a receipt or voucher. This receipt should show the date, the amount, the employee's name, and what the money is for. The employee keeps the receipt, and the custodian keeps a copy in a petty cash log or box.
If the employee spends the cash and needs to be reimbursed, they bring back the receipt for the actual purchase—the coffee shop receipt, the office supply receipt—along with their petty cash voucher. The custodian compares the two, verifies the amount, and records the reimbursement in the log. This creates a paper trail: the voucher shows who took the money, and the receipt shows what it was spent on.
Some businesses use a petty cash box or envelope system where physical cash sits in a locked drawer, and others use a debit card linked to the petty cash account. The debit card method is faster but offers less control; the cash box method is slower but makes overspending obvious because the money runs out.
Reconciling petty cash monthly and restocking the fund
At the end of each month—or weekly if your business has high petty cash activity—reconcile the account. Count the physical cash in the box or envelope. Add up all the receipts and vouchers for expenses that month. The total of cash plus receipts should equal the starting balance for that period.
If the numbers do not match, investigate. Look for receipts that were not recorded, or cash that was taken but not documented. Small discrepancies happen; large ones suggest theft or sloppy record-keeping and need to be addressed.
Once reconciled, replenish the fund. If you started the month with $500 and spent $380, transfer $380 from your main account back into petty cash to bring it back to $500. Record this transfer in your accounting system. The receipts and vouchers from that month become your supporting documentation for those expenses in your tax records.
Tax and accounting treatment of petty cash expenses
Petty cash expenses are deductible business expenses, just like any other purchase. The difference is in how you document them. For your tax return, you do not list each $5 coffee or $12 pen purchase separately. Instead, you group petty cash expenses by category—office supplies, meals, postage, repairs—and report the total for each category.
The receipts and vouchers are your proof. Keep them organized by month and category. If the IRS asks about your deductions, you need to show that the money was actually spent on business purposes. A petty cash log with dated receipts is strong documentation.
Some businesses use a petty cash expense account in their accounting software, where all petty cash reimbursements are recorded as a single line item each month. Others break them down by expense type as they reconcile. Either method works as long as you keep the receipts and can explain where the money went.
Common problems with petty cash accounts and how to prevent them
The most common problem is poor record-keeping. Employees take cash without a voucher, or the custodian forgets to log a reimbursement. Over time, the cash in the box no longer matches the records, and you cannot tell where the money went. Prevent this by requiring a voucher every single time, with no exceptions, and by reconciling monthly without fail.
Another problem is the petty cash fund becoming a personal loan box. An employee borrows $50 for lunch and promises to pay it back later, but never does. Set a clear policy: petty cash is for documented business expenses only, not personal loans. If an employee needs an advance on their paycheck, that is a different process handled by payroll.
A third issue is the fund running out of money before the month ends. This usually means the spending limit is too low or the starting balance is too small. Track how much you spend from petty cash over a few months, then adjust the balance upward if needed. A fund that runs dry is not serving its purpose.
Frequently Asked Questions
Do I need a separate bank account for petty cash, or can I just keep cash in a drawer?
You can keep physical cash in a drawer, but a separate checking account is better for accounting and tax purposes. The account creates a clear record of where the money came from and where it went. If you keep cash in a drawer with no account, you have no bank statement to back up your records, and the IRS may question your deductions.
What happens if the petty cash custodian quits or takes time off?
Designate a backup custodian before that happens. Both should know the procedures, have access to the account, and understand the reconciliation process. When the primary custodian leaves, do a full reconciliation immediately, document the handoff, and make sure the new custodian signs off on the balance they are taking over.
Can I use a credit card instead of a petty cash account?
A business credit card can work for small expenses, but it has drawbacks. Credit cards charge interest if you do not pay the balance monthly, and they do not create the same spending discipline as a cash box. Petty cash is better if you want to control spending tightly or if your employees do not have credit cards.
How much should I keep in petty cash if my business is seasonal?
During busy seasons, increase the balance to cover higher small-expense spending. During slow seasons, reduce it. Review the balance quarterly and adjust based on actual spending patterns. This keeps money from sitting idle when you do not need it.
What if I find a big discrepancy when I reconcile petty cash?
Investigate immediately. Review all receipts and vouchers for the period. Ask the custodian if they remember any transactions that were not recorded. If you still cannot account for the money, treat it as a loss, document it, and tighten procedures going forward. Consider whether the spending limit is too high or whether the custodian needs more training.