The imprest idea, in one paragraph
A petty cash tin holds a fixed amount — the float. Money leaves it only against a receipt, so at any moment the cash plus the receipts should equal the float. At the end of a period you count the cash, add up the receipts, and draw exactly the receipts total from the bank to bring the tin back to the float. That last sentence is the entire control: if the drawer balances, the replenishment and the receipts total are the same number, and if they are not, you have found something.
The float is a fixed amount, not a running balance, which is what makes the check work. A tin that gets topped up by feel, in round numbers, whenever it looks low, is a tin nobody can reconcile.
Counting it properly
Counting by denomination takes an extra minute and is worth it twice over. It produces an arithmetic total rather than a remembered one, and it produces a record of what was actually in the tin, which is the difference between "there was about two hundred" and a line of figures somebody can check tomorrow. It also surfaces the slow drift toward coin, which is how a float becomes unusable without anyone noticing.
The person who counts should ideally not be the person who holds the tin. That is the oldest control in bookkeeping and it costs nothing in a business with two people in it. Where one person genuinely does everything, the substitute is to count on a fixed schedule and keep every sheet, so a pattern would be visible even if a single period is not.
Reading a variance
A variance is a measurement, not an accusation. Most of them are receipts that have not been handed in yet, rounding at a till, or a miscount, in roughly that order. The number worth watching is not any single period but the pattern: variances that alternate in sign and stay small are noise, and variances that run consistently in one direction are a process problem somewhere.
Two diagnostic habits help. Compare the gap against the individual receipts — a shortfall that matches a purchase somebody remembers is usually exactly that. And look at the shape of the number: a gap that is a clean multiple of five or twenty dollars is more likely a whole note than an accumulation of small errors, which points you at a single event rather than a drift.
Where the money actually goes
The category breakdown is the part of this sheet that pays for itself over a year. Petty cash is where small recurring costs hide, because no individual receipt is large enough to prompt a question. Three hundred dollars a year on shop coffee is fine if it is a decision and irritating if it is a discovery. Categorise consistently — the same word every time, since the grouping is on exact text — and the pattern shows up on its own.
If those categories start looking like a budget, they probably are one, and the budget sheet maker is a better home for them than a cash tin.
When petty cash is the wrong tool
Cash is expensive to control. Every float needs a custodian, a count, a reconciliation and somewhere to file the receipts, and that overhead is fixed whether the tin holds fifty dollars or five hundred. Plenty of businesses that ran a tin out of habit found that the overhead outweighed the convenience once most small purchases moved onto a card with a statement that reconciles itself. Whether that is true for you depends on what the cash is actually used for, and it is a reasonable thing to ask your bookkeeper. If you keep it, keep it small, keep it counted, and keep the receipts stapled to the sheet — a reconciliation filed without its receipts proves nothing at all.
Questions people ask
What size should the float be?
Small enough that losing it would be annoying rather than serious, and large enough to cover a normal period without a mid-period top-up. In practice people size it at roughly one period of ordinary spending plus a margin, then leave it alone. The number is a judgement about your own spending pattern, not a standard, and this page will reconcile whatever figure you set.
The replenishment does not equal my receipts total. Is that wrong?
Under an imprest float those two figures agree only when the count balances, and the difference between them is exactly the variance. So a mismatch is not an error in the arithmetic; it is the arithmetic reporting that the cash and the paperwork disagree. Recount first, then look for a missing receipt, then record the variance rather than absorbing it quietly.
How should I record a variance in the books?
That is a bookkeeping question with more than one defensible answer and it depends on how your accounts are set up and how large and how frequent the differences are. Ask whoever keeps your books or your CPA once, write down what they say, and then do the same thing every period. Consistency matters more than which treatment you pick.
How long do I keep the receipts?
Record retention periods are set by your tax authority, vary by record type, and can be extended by particular circumstances. This page will not name a number. The practical habit is to keep the reconciliation sheet and its receipts together with the accounting records for the same year and to ask your CPA how long that whole file needs to survive.
Can I use this for a retail cash drawer?
Partly. The denomination count and the variance arithmetic work exactly the same way. What is missing is the sales side — a retail drawer starts from a till float and is reconciled against takings as well as spending, and this sheet has no takings column. For a drawer that only ever pays money out, such as a shop float used for supplies, it fits directly.