Recording petty cash journal entries follows a two-step pattern under the imprest system: one entry when you first set up the fund, and a repeating entry each time you replenish it. The setup entry debits Petty Cash and credits your checking account. Every replenishment after that debits the individual expense categories for what was actually spent and credits checking for the total of the replenishment check, while the Petty Cash account balance itself stays fixed at its original amount.
That fixed balance is the whole point of the imprest method. Once the fund is established at, say, $200, the Petty Cash line on your balance sheet stays at $200 until management decides to resize or close the fund. Everything that happens in between is recorded as expenses, not as changes to the fund balance.
The Setup Entry
To create the fund, write a check payable to “Petty Cash” for the amount you want on hand. Most businesses fund somewhere between $50 and $500 depending on how frequently small purchases come up. The custodian cashes the check and puts the money in a locked box.
On the books, the entry is straightforward. For a $200 fund:
- Debit: Petty Cash — $200
- Credit: Cash (Checking) — $200
You’ve moved money from one asset account to another. Nothing has been expensed yet because nothing has been spent. The Petty Cash account now sits on the balance sheet at $200 and will stay there.
The Replenishment Entry
This is the entry you’ll post most often, and once you’ve seen it, every replenishment after it follows the same shape. When the cash in the box runs low, the custodian totals the vouchers by expense category and submits them for a replenishment check written for the exact total spent.
Say the custodian spent $93.75 over two weeks: $22.75 on shipping, $50.80 on postage, and $19.05 on office supplies. The physical count also came up $1.15 short of what the log said should be in the box. The entry looks like this:1Financial Accounting. Journalizing Petty Cash Transactions
- Debit: Shipping Expense — $22.75
- Debit: Postage Expense — $50.80
- Debit: Office Supplies — $19.05
- Debit: Cash Over/Short — $1.15
- Credit: Cash (Checking) — $93.75
Notice what isn’t in this entry: the Petty Cash account. The fund balance on the books stays at $200. You’re recording where the cash actually went (each expense line) and where the replacement money is coming from (the checking credit). The physical check restores the currency in the box, and the journal entry catches the general ledger up to reality.
The pattern holds regardless of how many categories you use. Every category the custodian tracked in the log becomes its own debit line. The credit is always a single line for the total replenishment check.
Cash Over and Short
Small discrepancies between the physical count and the log happen regularly. Rather than force the numbers to match, you plug the difference into a Cash Over and Short account. A shortage — cash less than expected — is a debit, as in the example above. An overage is a credit. Over the course of a year this account usually carries a small debit balance because shortages tend to outnumber overages, and the net balance shows up on the income statement as a minor expense.
Increasing, Decreasing, or Closing the Fund
If the fund runs dry too often, management may raise it. Increasing a $200 fund to $400 uses the same pattern as the original setup, for the amount of the increase:
- Debit: Petty Cash — $200
- Credit: Cash (Checking) — $200
Shrinking the fund reverses that. To take it from $400 back down to $200:
- Debit: Cash (Checking) — $200
- Credit: Petty Cash — $200
The custodian deposits the excess cash into the business checking account, and the Petty Cash balance on the books drops accordingly.
Closing the fund entirely is a two-step process. First, run a final replenishment entry to expense every outstanding voucher. Then reverse the original setup entry for the full fund amount. If the fund was $200:
- Debit: Cash (Checking) — $200
- Credit: Petty Cash — $200
The custodian deposits whatever cash is left, the Petty Cash account goes to zero, and the fund no longer exists on the balance sheet.
Documentation That Has to Sit Behind Every Entry
The entries above only survive an audit if the paperwork behind them holds up. Each disbursement should be documented on a petty cash voucher showing the date, amount, recipient, and business purpose, signed by both the person receiving the cash and the custodian. The original vendor receipt gets stapled to the voucher.
IRS Publication 583 identifies petty cash slips with attached receipts as the supporting documentation the IRS expects for small cash payments, and it directs businesses to organize those records by year and expense type.2Internal Revenue Service. Publication 583 (12/2024), Starting a Business and Keeping Records If an examiner asks for backup on a deduction and you can’t produce it, the deduction gets disallowed.
One narrow relief exists. IRS rules don’t require a receipt for a business expense under $75, except for lodging, which always needs one.3Internal Revenue Service. Publication 463, Travel, Gift, and Car Expenses For a small purchase where the receipt got lost, a detailed written description on the voucher will generally hold up. For anything $75 or more, you need the actual receipt. Most internal petty cash policies apply a stricter standard and require receipts for every disbursement regardless of amount, which is the safer practice.
Publication 583 also advises against writing checks payable to “Cash” for business expenses. When you do cut a check to replenish the fund, keep the batch of vouchers and receipts tied to that specific check so there’s a clean trail from the bank withdrawal to each individual purchase behind it.2Internal Revenue Service. Publication 583 (12/2024), Starting a Business and Keeping Records
There’s a further consequence if an employee takes a petty cash advance and never turns in a receipt or the unspent cash. Under the accountable plan rules, an unsubstantiated advance gets reclassified as taxable wages, subject to income tax and payroll withholding.4eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements Missing documentation doesn’t just cost you a deduction; it can create a payroll tax problem.
Transactions That Shouldn’t Run Through Petty Cash
Some payments look small enough to pull from the box but create problems that no journal entry can clean up later. Keep these out of the fund:
- Payments to contractors or freelancers. Splitting a vendor’s payments between petty cash and accounts payable makes cumulative tracking for 1099-NEC reporting difficult. For 2026, businesses must file a 1099-NEC for any non-employee paid $2,000 or more in a calendar year, and cash payments hidden across two systems are the easiest way to miss that threshold.5Internal Revenue Service. Form 1099-NEC and Independent Contractors
- Employee wages or bonuses. Any compensation has to go through payroll for proper tax withholding.
- Personal loans or check cashing for employees. This destroys accountability for what’s in the box.
- Travel advances, which belong in the company’s expense reimbursement system.
- Recurring vendor payments, which belong in accounts payable with a normal purchase order.
If a purchase would exceed the per-transaction cap in your policy, or if it needs tracking for tax reporting beyond a simple expense deduction, route it through normal purchasing rather than the petty cash box.