Petty Cash Float — What It Is and How Much to Keep

What Is a Cash Float?

A cash float is the working cash you put into a till, register, drawer, or market-stall money pouch before trading starts. Its only job is to make change for paying customers. Without a float, the first customer who hands over a $20 bill for a $7 item is stuck waiting while you run to the bank.

Typical cash float sizes:

• Small retail shop: $100–$200 in mixed bills and coins
• Café or fast-food till: $150–$250
• Market stall: $50–$150 (depending on average ticket size)
• Pop-up event or fair booth: $100–$300
• Multi-register store: a separate float per drawer, often $200 each

The float stays the same size day after day. At the end of the shift, you remove the day’s sales and refill the float back to its starting amount for the next shift. The float itself never gets “spent” — it just enables transactions.

The cash float formula

If your variance is more than a dollar or two, something went wrong: a miscount, a missing receipt, or someone took cash without recording it. The float formula is what makes the variance visible on day one, before small problems become big ones. For the full count process, see our cash count sheet and cash drawer reconciliation guides.

What Is Petty Cash?

Petty cash is a small reserve of cash — usually $100 to $500 — kept in a locked box in the office. Its purpose is to pay for minor business expenses that are too small for a card transaction or a bank transfer: parking meters, postage stamps, last-minute supplies, lunch for a late client meeting, a courier’s tip.

Petty cash is only for outgoing money. It does not make change for customers, it does not get topped up from the till, and it does not move between locations. The custodian (one named person) holds the key, every withdrawal is logged with a slip or a receipt, and the box is reconciled on a fixed schedule.

If you’re setting one up for the first time, see how to start a petty cash box and how much petty cash to keep on hand for the practical setup.

Side-by-Side: Cash Float vs Petty Cash

	Cash Float	Petty Cash
Purpose	Make change for paying customers	Pay for small business expenses
Direction of money	Cash in from sales	Cash out for purchases
Where it lives	In the till, register, or stall pouch	In a locked box in the office
Who handles it	Anyone working the register	One named custodian
Typical size	$100 – $300	$100 – $500
Reconciled	Every shift / every day	Weekly or monthly
Documentation	Z-report or daily takings sheet	Receipt / voucher per disbursement
In the books	Goes to Sales & Cash on hand	Stays as a fixed asset until replenished

Both are tracked, both are reconciled, but they answer different questions. The float answers “did the day’s takings match what we sold?” Petty cash answers “where did the $283 we spent on small things this month go?”

What Does “Petty Cash Float” Mean?

This is where the confusion starts. People often say “petty cash float” and mean the fixed starting balance of the petty cash box itself — the $200 (or whatever amount) you replenish back to whenever the box runs low.

So when an accountant says “our petty cash float is $300,” they mean: the petty cash box always holds $300 worth of cash + receipts. Cash gets spent, receipts pile up, the custodian takes the receipts to the bookkeeper, gets refunded the spent amount, and the box is back to $300 cash. For how to choose that amount, see how much petty cash to keep.

This “petty cash float” is not the same as a register float. Despite sharing the word “float,” the petty cash float is the set point of an outgoing-only system, while a retail cash float is the working balance for incoming customer payments. Same word, very different meaning.

Petty Cash Float in Accounting

In accounting, the petty cash float sits on the balance sheet as a current asset, usually under “Cash on hand” or a dedicated “Petty Cash” account. The float amount itself doesn’t change unless you formally increase or decrease the float — it’s a fixed dollar amount that just shifts between physical cash and recorded expenses.

Here’s how a typical replenishment looks in the books:

1. The custodian collects receipts totalling, say, $87 (parking, supplies, postage).
2. The bookkeeper records each expense to the right category — not as “petty cash spent.”
3. The bookkeeper hands $87 in cash back to the custodian.
4. The petty cash float on the balance sheet stays exactly the same.

This is called the imprest system — the float is an imprest amount that always returns to its set value. Same logic applies whether your float is $100 or $1,000. For the operational side of this cycle, see our petty cash replenishment form and reconciliation guides.

Real Examples

Why Mixing Them Up Causes Problems

When a small team uses “cash float” and “petty cash” interchangeably, two specific things go wrong:

• Money flows the wrong way. A cashier needs $40 for a quick supply run, opens the till, takes $40, and writes “office supplies” in the daily takings. Now the float looks short by $40, the supply purchase has no receipt, and at end-of-day reconciliation it looks like a sale wasn’t recorded.
• Reconciliation becomes guesswork. If purchases and sales share a single drawer, no one can tell whether a $73 variance is a missed sale, an unrecorded purchase, or genuine cash loss. Two separate boxes give you two clean answers.
• The bookkeeper can’t close the month. Sales should match the float reconciliation. Petty cash expenses should match the receipt envelope. When the two are mixed, the bookkeeper is stuck reverse-engineering what each transaction meant.

The fix is simple: two physical containers, two logs, two people accountable. Whoever counts the till at end-of-shift never touches petty cash, and the petty cash custodian never reaches into the till.

How to Track Both Without Losing the Balance

You can run both systems on paper if you’re disciplined — a daily takings sheet for the float, a voucher pad for petty cash. Most teams stop being disciplined within three weeks.

The simpler option is to give each system its own digital cash box: one for the register float, one for petty cash. Each has its own opening balance, its own running total, and its own reconciliation. When sales come in or expenses go out, the running balance updates and the receipt is generated automatically — no spreadsheet, no calculator.

This is also where the SpendNote browser-based petty cash app earns its keep: separate cash boxes per system, role-based access (the cashier sees the float, the office manager sees petty cash, the owner sees both), and a printable PDF receipt for every cash movement — whether it’s a customer paying for a coffee or the custodian buying postage.

See pricing or visit our FAQ for more info.