How to Account for Petty Cash: Starting the Fund, Topping It Up and Counting the Box

An architecture studio of six people keeps a tin in the bottom drawer of the reception desk. Inside is $200, and over a month it pays for courier runs, plotter paper, coffee for a client walkthrough and the occasional parking meter. None of it shows up on a bank statement, so unless the studio’s own books record it, no record exists at all.

This article explains how to account for petty cash so that a tin in a drawer is as well documented as a bank account. Following Halden & Rowe Architects through one month, we’ll start the fund, book a month of small purchases in a single entry, deal with a count that doesn’t quite match, and set the few rules that keep a small float from becoming a loose end.

Petty Cash in Plain Terms

Petty cash is a small, fixed sum of notes and coins kept at the office for minor purchases that aren’t worth a bill, a check or a card swipe. Think postage, a courier tip, a box of pens, or paying a staff member back for a parking meter. It exists for convenience; it is not a spare bank account.

What should petty cash not be used for?

Anything that has a proper channel of its own. Decide in advance what the tin may pay for, set a cap per purchase — often $50 — and rule out these outright:

• Paying staff. Wages and bonuses go through payroll so taxes are withheld and reported.
• Paying contractors. Cash paid to an independent contractor still counts toward their 1099-NEC, so it belongs on a vendor record.
• Loans and IOUs. A note saying “owe $40 — J.” is an undocumented loan to an employee, not cash.
• Changing personal checks. The fund is not a cash machine.

Why a Fixed (Imprest) Fund Works

What is an imprest fund?

An imprest fund is one whose total never changes. The cash still in the tin plus the receipts for what has been paid out always add up to the same figure — $200 for Halden & Rowe. When the cash runs down, the studio refills it with exactly the amount the receipts account for.

The payoff is simplicity. The Petty Cash balance in the general ledger sits still month after month; spending is posted in one go at each top-up; and anyone can count the tin and know in minutes whether money is missing.

How to Account for Petty Cash, Entry by Entry

How do I record opening a petty cash fund?

October 1. The studio withdraws $200 and puts it in the tin:

No expense has happened; cash has moved from one pocket of the business to another. Petty Cash lives with the bank accounts among the current assets in your chart of accounts.

Should each purchase be entered in the books as it happens?

No. Recording every coffee as it’s bought is the habit that tangles most petty cash ledgers. Instead, each payout gets a petty cash slip — date, amount, reason, who took the cash, who approved it — with the receipt clipped on, and it goes into the tin. The tin is the working record until the next top-up.

By month end Halden & Rowe’s slips add up to $163.80:

Which accounts are debited when petty cash is topped up?

The studio manager counts the tin and finds $37.20. With $163.80 spent, it should hold $200.00 − $163.80 = $36.20 — so there is $1.00 too much, most likely change from a courier run that went back without a note. Refilling to $200 takes $200.00 − $37.20 = $162.80:

The Petty Cash account never appears. It has read $200 all month, and with $162.80 back in the tin it is $200 in reality too. Meanwhile each purchase reaches its own expense category, so the profit and loss statement shows postage as postage rather than a lump called “petty cash.”

What if there is more cash in the box than expected?

Exactly what happened here: credit the difference to Cash Short and Over. A shortage works the other way — a debit, reported as a small miscellaneous expense. Either way, write it down. Dropping a spare dollar into the tea fund or filling a gap from your own wallet feels harmless, but it wipes out the one signal that tells you whether the fund is being handled carefully.

How do I make the fund bigger or smaller?

If the tin keeps running dry mid-month, raise it with a separate entry — to take it to $250, debit Petty Cash $50 and credit the bank $50 — and reverse that to shrink it. Opening and resizing are the only entries that should ever touch the Petty Cash account.

Counting the Box

How do you check petty cash is correct?

A petty cash count is a five-minute reconciliation, and it belongs at every top-up:

1. Count the cash by denomination and note the total on a count sheet.
2. Total the slips, confirming each one has a receipt, a reason and an approval.
3. Add cash and slips together and compare to the fund; record any gap in Cash Short and Over.
4. Sign it twice — the person counting and the person who keeps the tin.
5. Stamp the slips “paid” so none can be reused.

House Rules for the Cash Box

A $200 tin hardly seems worth a policy — which is precisely why it so often has none. The controls a small team can realistically run fit it well:

• A named keeper. One person has the key and answers for the balance.
• Different hands for cash and books. Whoever pays out shouldn’t also post the top-up or sign the check.
• Slip and receipt, every time. No paperwork, no cash.
• A cap per purchase. Anything larger goes on a bill or the company card.
• Unannounced counts. The owner counts the tin a few times a year without warning.
• Locked away overnight. A locked tin in a locked drawer, never on the desk.

The cash box is where a business shows what it does when nobody is checking. Count it, and you’ve told everyone someone is.

Where Petty Cash Bookkeeping Goes Wrong

1. Expensing the whole fund when it’s opened. The $200 is still cash; booking it as expense understates assets and hides what was actually bought.
2. Posting purchases twice. Once from Petty Cash as they happen, again at the top-up — and the account drifts below zero.
3. One-line top-ups to “Miscellaneous.” The numbers balance; the information is gone.
4. IOUs in the tin. They are employee advances and belong in their own account.
5. Missing the month-end top-up. Expenses slip into the wrong month and cash is overstated.

How Kantivo Handles Petty Cash

• A chart of accounts you control. Add Petty Cash among your cash accounts and a Cash Short and Over account, and the balance sheet shows the fund next to the bank.
• Journal entries on a true double-entry ledger — opening, resizing and multi-line top-ups post only when they balance.
• Receipt capture keeps the receipts behind each top-up with the books, not in an envelope in the drawer.
• General ledger account detail lists every movement in Petty Cash; on an imprest fund there should be almost none, so anything out of place stands out.
• Cash payments tagged to a vendor feed the 1099 report, so a contractor accidentally paid from the tin is still picked up at year end.

Frequently Asked Questions

How do I record opening a petty cash fund?

Withdraw or write a check for the fund amount and record a debit to Petty Cash and a credit to the bank. Nothing has been spent — cash has only moved from the bank to the cash box. Petty Cash sits with your other cash accounts as a current asset.

Which accounts are debited when petty cash is topped up?

The expense accounts behind the receipts — postage, supplies, parking and so on, each for its own total. Any counting gap goes to Cash Short and Over, and the bank is credited for the top-up. Petty Cash itself isn’t debited, because the top-up only restores the fund to the balance the ledger already shows.

What if there is more cash in the petty cash box than expected?

Credit the excess to Cash Short and Over, which reduces miscellaneous expense or appears as small other income. It usually means change or a refund went back without a note. It shouldn’t be pocketed or ignored, and repeated overages deserve the same attention as repeated shortages.

Should petty cash be topped up at the end of every month?

Yes. A month-end top-up moves that month’s receipts into the right period’s expenses and makes the cash in the box match the Petty Cash balance on the balance sheet. Between month ends, top up whenever the cash runs low, and count the box each time.

How big should a petty cash fund be?

Enough for two to four weeks of small purchases — for most small offices, $100 to $500. If it needs refilling every few days it’s too small; if it’s almost never refilled, it holds more cash than you need on site.

Is petty cash an asset or an expense?

The fund is an asset — cash on hand, shown with your bank balances. What it buys becomes expense when the box is topped up and the receipts are posted. Expensing the whole fund when it’s opened is a common mistake that understates cash and loses the detail of what was bought.

Where This Leaves You

Everything about how to account for petty cash follows from one idea: the fund has a fixed total, and the cash plus the receipts must always reach it. Book the opening once, post nothing in between, and let a single top-up entry route each purchase to its expense account and any stray dollar to Cash Short and Over.

Do it every month, give the tin one keeper, and count it now and then when nobody expects you to. The amounts are small. The discipline isn’t — and it is the same discipline that keeps the rest of your books worth trusting.

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