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What is Petty Cash Management?

Petty cash is a small reserve of physical currency — typically kept in a locked box — that a business maintains to pay for low-value expenses where a card or bank transfer is impractical: stamps, taxi fares, office snacks, minor supplies. Petty cash management is the system of controlling that float: setting a limit, recording every withdrawal, collecting receipts, and reconciling the box to the ledger.

The most common control is the imprest system: you fix a float (say €200) and every time cash is spent you keep a petty cash voucher and receipt. When the box runs low, the bookkeeper tops it back up to €200 by withdrawing from the bank and posting each voucher to its correct expense account — postage, travel, sundries. At any moment, cash in box plus unreimbursed vouchers should equal the float amount exactly. If it does not, there is a discrepancy to investigate.

Petty cash is the most frequently abused account in small businesses because it is physical, unsupervised, and low-value enough that nobody checks. Best practice: keep the float small, limit who can access the box to one or two people, require a receipt for every single transaction no matter how small, and reconcile at least monthly. Many businesses now replace petty cash entirely with prepaid or debit cards that carry per-transaction limits and automatic receipts — same convenience, far stronger control.

Example

A small law firm keeps a €150 petty cash float for courier fees and client refreshments. Every withdrawal is logged on a slip with the date, amount, and purpose, and a receipt is stapled to it. At month-end the bookkeeper counts the box, matches it against the slips, tops up to €150, and posts the expenses to the ledger — the whole reconciliation takes under fifteen minutes.

Questions

What is the imprest system of petty cash?

Under the imprest system you fix a float amount (e.g. €200). Cash plus unreimbursed vouchers must always equal that fixed total. When the box is topped up, each voucher is posted to its expense account. This makes shortages immediately obvious and keeps the ledger accurate.

How much petty cash should a small business keep?

Keep the float as small as practical — usually between {price} and {price}. The goal is enough to cover minor expenses for two to four weeks without tempting misuse. If the float is constantly nearly empty, raise it slightly; if it rarely moves, lower it.

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