Petty cash in business is a small pool of physical currency, usually somewhere between $100 and $500, that a company keeps on-site to pay for minor day-to-day expenses without cutting a check or running a card. The fund starts at a fixed amount, gets spent down on documented purchases, and is then replenished back to that same starting balance. That last part is the whole system: cash plus vouchers in the box should always equal the amount you started with. Get that principle right and the rest is bookkeeping. Get it wrong and you have a tax problem, a theft problem, or both.
What Petty Cash Actually Covers
The fund exists for purchases where pulling out a corporate card or waiting on a check feels like overkill. Postage. A replacement phone charger. Parking meters. A last-minute run for printer paper. Bridge tolls on a local errand. Most businesses cap individual transactions somewhere between $25 and $75, though some go as high as $100. The unifying trait is that the purchase is small, immediate, and clearly tied to business operations.
Emergencies fall into the same category. A lightbulb burns out before a client meeting. A keyboard dies on a Monday morning. An unexpected visitor shows up and someone needs to buy coffee. Petty cash lets an employee walk to the nearest store and solve the problem instead of filing a purchase request and waiting three days.
What Petty Cash Should Never Cover
Most petty cash systems break down through scope creep. An employee asks to borrow $40 until payday. Someone wants to cash a personal check. A manager starts paying a freelance graphic designer $50 here and there for quick jobs. Each of these creates a different risk, and a well-drafted policy shuts them all down in writing.
- Salary advances and personal loans blur the line between business funds and personal use, and they are nearly impossible to track cleanly.
- Cashing personal checks turns the fund into a bank branch, and a bounced check leaves the custodian with a shortage to explain.
- Payments to contractors or freelancers add up over a year and can trigger federal reporting requirements.
- Recurring subscriptions and regular vendor payments belong in accounts payable, not in a cash box.
- Anything without a receipt gets refused. This is the single easiest rule to enforce and the one most often ignored.
Setting Up the Fund
Start by choosing a custodian. One specific person controls the cash, tracks disbursements, and takes responsibility for keeping it straight. That person should not also be the one who approves replenishment checks. Separation of duties is what keeps the system honest. The cash lives in a locked box inside a locked drawer or cabinet, and no one else has routine access.
Next, decide on the fixed starting balance. Accountants call this the imprest amount. A small office spending roughly $200 a month on minor items can work from a $200 or $300 fund. A business with heavier foot traffic or frequent supply runs might need $500. Aim for one to two months of anticipated small purchases.
Write a check to “Petty Cash” for that amount. The custodian cashes it and places the currency in the lockbox. From that moment forward, the total of cash plus vouchers in the box should always equal the original imprest amount.
Documenting and Reconciling Every Transaction
Every time money leaves the box, the person receiving it fills out a petty cash slip: date, amount, brief description of the business purpose. They sign it. The custodian attaches the store receipt. The IRS expects businesses to maintain records that identify the payee, the amount, and the business purpose of every expense claimed as a deduction, and petty cash gets no exemption from that rule.1Internal Revenue Service. Publication 583 (12/2024), Starting a Business and Keeping Records
Some businesses use pre-numbered voucher forms so any gap in the sequence is obvious, which helps catch missing paperwork before reconciliation day. A signed slip with an attached receipt is the minimum documentation for each transaction.
Reconciliation itself is straightforward. Count the remaining cash, add up the vouchers, and check whether the two figures together equal the original imprest amount. If the fund started at $300 and there is $85 in cash plus $215 in vouchers, everything balances. Small overages and shortages happen. A cashier hands back an extra quarter, or someone forgets to write a slip for a $3 purchase. The custodian should document any discrepancy immediately rather than quietly making up the difference from their own pocket.
When the cash runs low, the custodian bundles the vouchers and receipts and submits them to accounting. The bookkeeper reviews the documentation, confirms the math, and issues a new check for the exact total of the accumulated expenses. That check brings the fund back to full. The person signing the replenishment check should not be someone who requested funds from it.1Internal Revenue Service. Publication 583 (12/2024), Starting a Business and Keeping Records
Tax Rules That Trip Up Small Businesses
Accountable Plan Requirements
Petty cash reimbursements are not automatically tax-free. For the money to stay off an employee’s W-2, the reimbursement arrangement must qualify as an accountable plan under IRS rules. Three things must happen: the expense has a clear business connection, the employee substantiates it with receipts within a reasonable time, and any excess amount is returned. The IRS generally treats substantiation within 60 days of paying an expense, and return of excess within 120 days, as reasonable.2Internal Revenue Service. Publication 15 (2026 Draft), Employer’s Tax Guide
If an arrangement fails any one of those three requirements, every dollar paid through it gets reclassified as taxable wages, subject to income tax withholding, Social Security, Medicare, and federal unemployment tax. A pile of unsigned, receiptless petty cash slips is exactly the kind of thing that pushes an auditor to reclassify an entire fund as a nonaccountable plan.3Internal Revenue Service. Revenue Ruling 2003-106
Contractor Payments and 1099-NEC Reporting
Starting with tax year 2026, the reporting threshold for nonemployee compensation on Form 1099-NEC rises from $600 to $2,000. That threshold is cumulative for the calendar year, not per transaction. If your office pays a freelance handyman $80 out of petty cash six times across the year, then another $200 twice through accounts payable, you are at $680, well under the threshold. If those small payments add up to $2,000 or more, a 1099-NEC is required.4Internal Revenue Service. Publication 1099, General Instructions for Certain Information Returns (2026 Draft)
The practical takeaway is that your petty cash log needs to track who receives payments, not just what the payments are for. Aggregate by payee at year-end to see whether reporting kicks in. The $2,000 threshold will be adjusted for inflation beginning in 2027.4Internal Revenue Service. Publication 1099, General Instructions for Certain Information Returns (2026 Draft)
Cash Given to Employees Is Never De Minimis
Businesses sometimes use petty cash to hand employees $10 or $20 for lunch, a coffee run, or a small thank-you. Under IRS regulations, cash given to an employee is never excludable as a de minimis fringe benefit, even when buying the same item for the employee directly would have been excludable. Handing someone a sandwich can be a de minimis fringe. Handing them $10 to buy a sandwich is taxable compensation.5eCFR. 26 CFR 1.132-6 – De Minimis Fringes
If you want to provide occasional meals or snacks tax-free, buy the food yourself instead of giving employees cash to go get it. When petty cash does go to an employee for a non-reimbursement purpose, that amount belongs on their compensation.
How Long to Keep the Records
The IRS requires businesses to keep records supporting any deduction until the statute of limitations on the relevant tax return expires. For most businesses, that means holding onto petty cash vouchers, receipts, and reconciliation logs for at least three years after filing the return that claims those expenses.6Internal Revenue Service. How Long Should I Keep Records?
Keeping the Fund Safe from Theft
Petty cash is one of the easiest business assets to steal, precisely because the amounts are small enough that no one notices right away. A $20 shortage here, a missing receipt there, and over a year the losses can be substantial. Good controls are less about trusting people and more about removing temptation.
The foundation is single-custodian accountability. One person controls the fund, and the box stays locked when that person is not actively making a disbursement. A backup should have emergency access, sealed in an envelope in a safe for example, but the custodian is the only one routinely opening the box.
Beyond that, the most effective control is the surprise count. Someone other than the custodian, whether a manager, the bookkeeper, or the owner, shows up unannounced, counts the cash, totals the vouchers, and checks against the imprest amount. The fact that a surprise count could happen at any time does more to prevent theft than any lock. Regular reconciliation, monthly at minimum, should be documented in writing.
Keep the replenishment approval chain clear. The custodian submits vouchers to accounting, a different person reviews and approves, and a third person (or at least a different signer) cuts the check. The more hands touch the process at distinct checkpoints, the harder it is for any one person to manipulate the fund.
Prepaid Cards as an Alternative
Physical cash is increasingly optional. Reloadable prepaid business cards cover the same small, immediate purchases without the security risk of keeping currency on-site. A manager loads a set amount onto the card, employees use it for approved purchases, and every transaction shows up in a digital dashboard with the date, amount, and vendor name recorded automatically.
The advantages are practical: no cash to steal, no coins to count, an automatic transaction log that simplifies reconciliation, and spending limits set per card or per transaction. Several major banks offer cards marketed specifically as petty cash replacements. The IRS does not care whether small expenses run through cash or a prepaid card. The substantiation requirements are the same either way. You still need documentation of the business purpose, and employees still need receipts for anything the card system does not itemize on its own.
Some situations still call for physical currency. Tipping a delivery driver, feeding a parking meter, buying from a farmers market vendor who does not take cards. Most businesses end up keeping at least a small cash fund alongside whatever digital system they adopt.