Petty Cash Fund: Establishment, Replenishment & Journal Entries

A petty cash fund handles small cash payments (postage, supplies, tips) too minor for a check or card. It runs on the IMPREST SYSTEM: you fund it with a fixed amount, then keep a receipt for every disbursement so cash on hand plus receipts always equals the fixed total. The Petty Cash account is debited ONCE when the fund is established and is touched again only if you change the fund’s size — never for individual purchases. The expenses are recorded only at REPLENISHMENT, when you write a check to restore the fund to its fixed balance and debit the various expense accounts the receipts represent. Any difference between expected and actual cash flows through a Cash Short and Over account. That timing — expenses recognized at replenishment, not at each purchase — is the single most-tested idea here.

To set up a $200 petty cash fund, you write a company check for $200, cash it, and place the currency in the petty cash box. The entry: debit Petty Cash $200, credit Cash $200. Notice this just moves money from the checking account into a different asset (the cash box) — total assets are unchanged. From this point forward, every time the custodian pays out cash, they put a signed receipt into the box in its place. No journal entry is made for those individual payments; the receipts are the documentation that will drive the replenishment entry later. The custodian is accountable for keeping cash + receipts = $200 at all times.

When the cash runs low, the custodian totals the receipts and the company writes a check to bring the fund back to its fixed balance. This is when expenses hit the books. Suppose the $200 fund has receipts for Office Supplies $90, Postage $60, and Delivery Expense $35 — totaling $185 — with $15 cash remaining. The replenishment check is for $185 (to restore the box to $200). Entry: debit Office Supplies $90, debit Postage Expense $60, debit Delivery Expense $35, credit Cash $185. Petty Cash is NOT touched, because the fund balance is being restored to its original $200, not changed. Replenishment is also done at period-end regardless of cash level, so that all incurred expenses are recorded in the correct period (the matching principle).

Real petty cash boxes rarely reconcile to the penny. Suppose the $200 fund has receipts totaling $185 but only $13 in cash remains — expected cash was $15, so the box is $2 SHORT (185 + 13 = 198, not 200). The replenishment check is written for $187 (to bring $13 back up to $200). Entry: debit the expenses $185, debit Cash Short and Over $2, credit Cash $187. Cash Short and Over is debited for a shortage (a miscellaneous expense) and credited for an overage (miscellaneous revenue). If instead the box had $17 cash with $185 of receipts, it would be $2 OVER, and you would credit Cash Short and Over $2, writing the check for only $183. The account collects these small unexplained differences; a persistently large balance signals a control problem worth investigating.

When the fixed fund size itself changes, Petty Cash IS adjusted. To increase a $200 fund to $300, write a check for $100 and record: debit Petty Cash $100, credit Cash $100. To decrease a $300 fund to $200, the custodian returns $100 of cash to the bank and you record: debit Cash $100, credit Petty Cash $100. These are the only times after establishment that the Petty Cash account moves. Students frequently confuse a fund increase (which debits Petty Cash) with a replenishment (which does not), so anchor on the question: is the fixed balance changing? If yes, adjust Petty Cash. If you are just restoring it to the same fixed amount, only the expenses and Cash move.

Snap a photo of a petty cash problem and AccountingIQ sorts out whether it is an establishment, a replenishment, or a resize, totals the receipts, computes any Cash Short and Over, and builds the journal entry with the correct accounts — so you never accidentally debit Petty Cash on a replenishment. This content is for educational purposes only and does not constitute professional accounting advice.