A purchase order controls buying before an invoice arrives. Everhour keeps project rates and costs aligned with billable work.
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A purchase order is a buyer-issued document. It tells a vendor what you are ordering, the agreed price, the quantity, delivery details, payment terms, and the internal approval attached to the purchase. It comes before the vendor invoice. The invoice comes later from the seller and requests payment against the order, delivery, or completed work.
Use a purchase order app when you need a clean buying record before money changes hands. A small business can use it for equipment, subscriptions, materials, contractor work, or project expenses. The practical goal is simple: send the vendor a document with enough detail that fulfillment, invoice matching, and internal approval do not rely on email threads.
A useful purchase order includes the buyer name and address, vendor name and address, PO number, issue date, delivery date or service period, item descriptions, quantities, unit prices, extended prices, subtotal, applicable tax line, total, payment terms, delivery instructions, and an authorized contact. The PO number matters because the vendor can place it on the invoice and your bookkeeper can match the two documents.
Keep a purchase order distinct from nearby documents. A quote or estimate is a pre-work price offer from the seller. A purchase order is the buyer's approval to buy. An invoice is the seller's request for payment. A receipt proves payment was received. Treating these as interchangeable creates approval gaps and makes payment disputes harder to resolve.
United States private-sector purchase orders do not follow one federal VAT or GST format. Sales and use tax is state and local, so the tax line depends on the seller's obligation, the buyer's location, product or service taxability, and the place of sale. Washington, for example, has a 6.5% state sales tax portion plus a local portion based on where the customer receives the goods or services.
Service taxability also changes by state and service type. California generally taxes retail sales of tangible personal property and only some service or labor charges, while Texas defines 16 broad categories of taxable services. A purchase order app should let you enter a specific tax line or leave tax off when the purchase is not taxable, instead of forcing a flat national rate.
A one-off purchase order works when the order is simple, the approval is obvious, and the vendor only needs a reference number for the later invoice. It is enough for a single equipment order, a small materials purchase, or a contractor engagement with clear scope and payment terms. Save the document with the vendor quote, delivery proof, and final invoice.
A managed workflow becomes necessary when purchases connect to project work, internal labor cost, billable rates, and client billing. Everhour separates cost and billable rates, supports per-person defaults and per-project overrides, preserves dated rate history, and prices billable work by project, member, or task. That structure helps teams keep project costs, client charges, and invoice-ready amounts connected.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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A purchase order is issued by the buyer before the purchase is completed. An invoice is issued by the seller after goods ship, services are performed, or a billing milestone is reached. The purchase order authorizes the buy and gives the seller a reference. The invoice requests payment and should match the approved order details.
The vendor invoice should show the purchase order number when your buying process uses POs. That reference lets the bookkeeper compare the invoice against the approved buyer document, including vendor name, item description, quantity, price, tax line, and payment terms. Missing PO numbers slow approval because the invoice has no obvious internal match.
United States private-sector purchase orders do not have a single federal VAT or GST format. Ordinary businesses use purchase orders as contract and recordkeeping documents. Sales and use tax treatment comes from state and local rules, nexus, product or service taxability, and the place of sale, so the tax line needs transaction-specific support.
A purchase order can cover services when the document names the service, period, rate, quantity or hours, delivery expectations, and payment terms. The tax treatment still depends on state rules and the service type. California and Texas treat service taxability differently, so a service PO should avoid assuming one nationwide tax rule.
Vague line items cause the most avoidable disputes. A line such as "consulting work" gives the vendor and buyer too little to match later. A clearer line names the project, service period, rate basis, quantity, agreed price, tax treatment if applicable, and delivery or acceptance condition. The later invoice can then follow the approved record.
Everhour separates internal cost rates from client-facing billable rates, with default per-person rates and per-project overrides. Rate changes can start from a chosen date, so older project reports keep their original calculations while current work uses the updated pricing.
Everhour can price billable work by project, member, or custom task rate, then use tracked billable time and expenses for invoices. Non-billable tasks stay out of billable totals, so the invoice reflects the approved commercial setup instead of every hour logged.
Track project costs and billable rates in Everhour so approved work, dated rate changes, and invoice-ready amounts stay aligned from purchase decision to client billing.
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