Internal Controls for Petty Cash in a Kenyan Business
The specific controls that stop petty cash from becoming a source of leakage, fraud, and month-end surprise, without making the process unworkable.
Petty cash is the smallest account in the business and the easiest one to abuse. Not because the amounts are large, but because the controls around a KES 500 expense are rarely as serious as the controls around a KES 50,000 invoice. The gap is where the losses live.
This is the control framework that works for a business of any size, in the order that matters.
Why petty cash needs controls at all
Three reasons.
First, petty cash moves in cash. Cash is untraceable once it leaves the box. A bank transfer can be reversed. A card payment has a statement. Cash just disappears.
Second, petty cash is where the smallest transactions live, and small transactions rarely get the same scrutiny as large ones. A KES 500 expense is signed off by the custodian and forgotten. Over a year, 500 small expenses become a real number, and the individual controls were never calibrated for the total.
Third, petty cash is often handled by whoever is most junior in the business. The custodian is not usually a senior person with a stake in the business. They are the receptionist or the office assistant, doing what they have been asked. They may be entirely honest and still be the source of leakage because they were never given the framework to be otherwise.
The seven controls
This is the framework. It is not complicated. Most businesses skip two or three of the seven and that is exactly where the leakage happens.
Control one: fixed float and imprest system
The petty cash box holds a fixed amount. Not “roughly” fixed. Exactly fixed. KES 20,000 means KES 20,000.
When cash is spent, the exact amount is reimbursed to restore the float. The float returns to its exact original amount every replenishment.
This is called the imprest system, and it is the single most important control. Without a fixed float, the box drifts upward and downward, and nobody can reconcile it because there is no fixed number to reconcile against.
Control two: separation of custody, approval, and reconciliation
Three roles, three different people, wherever the business has three people to assign them to:
- Custodian. Holds the cash, records expenses, disburses payments.
- Approver. Approves expenses before the custodian pays them out.
- Reconciler. Checks the monthly reconciliation of cash in hand plus vouchers against the float.
When the same person holds all three roles, there are zero controls. Even in a very small business, the owner should be the approver, even if the custodian and reconciler are the same person.
Control three: voucher for every payment, receipt for every voucher
No exceptions. No payments without a voucher. No vouchers without a receipt attached.
If the vendor cannot provide a receipt (a matatu ride, a small local purchase), the recipient writes a simple note explaining the expense on the voucher itself. This is not the same as a receipt, but it is a record and it is auditable.
Cash paid without a voucher is not a business expense. It is a withdrawal. It cannot be deducted from income tax because it cannot be shown to be business related.
Control four: per-transaction limit
Every petty cash payment has a maximum amount. Usually KES 2,000 to KES 5,000 per transaction, depending on the business size.
Anything above the limit goes through the regular purchasing process: invoice, approval, cheque or bank transfer. This keeps petty cash genuinely petty and prevents it from being used as a bypass for the purchasing controls.
The per-transaction limit also gives the custodian a clear answer when someone asks for cash above the limit. It is not a judgment call. The answer is “that needs to go through a purchase order.”
Control five: per-category limits
Some categories have their own limits, sometimes higher than the standard per-transaction limit, sometimes lower.
- Meals and entertainment. Often the most abused category. Many businesses cap at KES 1,500 per person per meal.
- Transport. Fuel and matatu fares often have a higher per-transaction limit because a single trip can cost more than a small office supply.
- Cleaning supplies. Often a category where the custodian has more discretion and where the amounts are small enough to slip through.
The categories do not need to be elaborate. Six to eight categories cover most businesses, and the limits should be documented and posted.
Control six: weekly reconciliation
Monthly reconciliation is where every serious control problem gets discovered one month too late.
Weekly reconciliation is where it gets discovered while it is still small. The custodian reconciles the box to the book at the end of each week. Cash in hand plus vouchers total should equal the fixed float.
Any variance gets investigated that week. Small discrepancies that get flagged immediately are easy to resolve. The same discrepancy found three weeks later is unexplainable.
Control seven: surprise counts
Once a month, unannounced, the approver or the reconciler physically counts the cash in the box and compares it to the book. This should not be scheduled. The custodian should not know when it is coming.
The surprise count is not because the business distrusts the custodian. It is because surprise counts are the only control that catches falsified books. Regular reconciliations can be backdated or invented. A surprise count cannot.
The realistic outcome of these controls
A business running all seven controls sees petty cash leakage drop from 3 to 8 percent to under 1 percent. That is the direct financial saving.
More importantly, the petty cash account stops being a source of month-end surprise. The monthly reconciliation either balances or the variance is explainable within 24 hours. Nothing sits in the “I need to look into that” pile for weeks.
What the controls do not solve
Two things.
The controls stop leakage from the petty cash box. They do not stop leakage from someone finding a way to make petty cash look like it was spent on something it was not. That requires a second layer, usually the accounting system matching vouchers to actual bank withdrawals and to the categories they were meant for.
The controls also do not stop the business from using petty cash for things that should be on purchase orders. That is a process discipline issue at the level above petty cash. The controls limit the damage but they do not fix the root cause.
What to actually implement this month
If none of the seven controls exist today, do not try to add all seven in one week. That fails because the custodian gets overwhelmed and the owner gets frustrated.
Start with three:
- Fixed float (control 1)
- Voucher for every payment (control 3)
- Weekly reconciliation (control 6)
Add the separation of roles (control 2) in month two. Add per-transaction limits (control 4) and category limits (control 5) in month three. Add surprise counts (control 7) in month four.
Six weeks into running the first three, the business will already see the difference. The leakage is lower, the reconciliation is cleaner, and the month-end close is faster. That is the argument for adding the remaining four.
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