What a purchase order is — and why it saves you money
A purchase order (PO) is your formal instruction to a supplier: exactly what you want, how many, at what price, and when. You issue it; when the supplier accepts, it becomes a binding contract on those terms. It flips the paperwork around — instead of reacting to whatever the supplier invoices, you set the terms first.
For a Kenyan business, the PO stops the two most common procurement leaks: being over-supplied (“we sent extra”) and being over-charged (“the price went up”). With a PO number on the order, the supplier’s invoice must match your PO on quantity and price — or you don’t pay it. That one control saves real money.
A PO also builds the audit trail lenders, funders and auditors expect: order → delivery note → goods received note → invoice → payment, all tied by one PO number. If you ever want a bank facility or to win a tender, this discipline is exactly what they look for.
What a proper purchase order includes
- ◆Your business (the buyer) name, contacts and KRA PIN
- ◆The supplier’s name
- ◆A unique PO number and the order date
- ◆Required delivery date and delivery location
- ◆Each item, quantity and agreed unit price, with the total
- ◆Payment terms, and an instruction to quote the PO number on the invoice
Common mistakes to avoid
- ✕Ordering by phone or WhatsApp with no PO — then having no comeback when the wrong goods or price arrive
- ✕No PO number, so the invoice can’t be matched and controlled
- ✕Leaving out the delivery date — the top cause of “we thought you meant next month”
- ✕Not filing the PO against the delivery note and invoice when they arrive
Questions
Is a purchase order legally binding?
A PO is your offer to buy. It becomes a binding contract once the supplier accepts it — by confirming, or by delivering. At that point both sides are held to the quantities, prices and terms on the PO. That is exactly why you put them in writing.
What’s the difference between a purchase order and an invoice?
You (the buyer) issue the PO to order goods; the supplier issues the invoice to demand payment. The invoice should quote your PO number and match it. PO first, invoice after delivery.
Do small businesses in Kenya really need POs?
If you buy stock or services regularly, yes. It is the cheapest financial control you have — it prevents over-supply and price creep, and it is the paper trail banks and funders expect. Even a one-person shop benefits from ordering against a numbered PO.
What is three-way matching?
The check auditors love: the purchase order, the goods received note (or delivery note) and the supplier’s invoice must all agree on item, quantity and price before you pay. The PO is where that chain starts.
Can I send a PO to a supplier on WhatsApp?
Yes — download the PDF and send it. What matters is that it is a proper numbered document the supplier accepts, not a loose message that is easy to dispute later.
The purchase order generator is free to build and preview. Downloading a clean PDF without the small watermark is KES 100 in Kenya — a one-off, valid for a few hours so you can make several — and free everywhere else. No account needed; your business details are saved on your own device.