What Is Invoice Approval?

What is invoice approval?

Invoice approval is the process of checking an invoice and confirming that it is accurate and ready to be paid. The review may be very simple for a small business or involve several approval stages in a larger organisation.

The purpose is to make sure the invoice matches what the business actually purchased or received. This can include checking the supplier, customer details, quantities, rates, taxes, payment terms, purchase order information, and final balance.

Once the invoice has been approved, it can normally continue through the customer's payment process.

Why is invoice approval important?

Invoice approval helps businesses avoid paying incorrect, duplicated, unauthorised, or incomplete invoices.

Without checking invoices, a business could accidentally pay the wrong amount, pay for goods or services that were not received, process the same invoice twice, or accept charges that do not match the original agreement.

A consistent invoice approval process also gives businesses a clearer record of who reviewed a payment and why it was approved.

How does the invoice approval process work?

The exact invoice approval process differs between businesses, but it normally begins when an invoice is received from a supplier, freelancer, contractor, or other business.

The invoice is then reviewed and compared with relevant information such as the original order, quotation, purchase order, contract, delivery information, timesheet, or completed work.

If the information is correct, the invoice can be approved. If something is missing or incorrect, it may be placed on hold, returned, or rejected until the issue is resolved.

Typical invoice approval steps

A business may use an invoice approval process containing steps such as:

• Receive the invoice
• Check the supplier details
• Check the customer or billing information
• Review the invoice number and dates
• Compare charges with the purchase or agreement
• Check quantities and rates
• Verify purchase order information where required
• Review taxes and additional charges
• Confirm that goods or services were received
• Approve the invoice for payment

What information is checked during invoice approval?

The person approving an invoice normally needs enough information to confirm that the document is accurate and relates to a genuine transaction.

The exact checks depend on the type of purchase and the customer's internal process.

• Supplier or business name
• Customer details
• Invoice number
• Invoice date
• Products or services provided
• Quantities
• Rates and prices
• Purchase order number
• Tax information
• Discounts
• Additional charges
• Payment terms
• Final amount due

Who is responsible for invoice approval?

Invoice approval responsibilities depend on the size and structure of the organisation.

A small business owner may personally check and approve every invoice. A larger organisation may use project managers, department managers, purchasing teams, finance staff, or accounts payable employees.

Some businesses also use several levels of approval depending on the invoice amount or type of purchase.

Invoice approval in small businesses

Small businesses often have a simple invoice approval process because fewer people are involved in purchasing and payment decisions.

The owner may check that the goods or services were received, confirm the amount, review the payment terms, and then approve the invoice for payment.

Even a simple review can help identify mistakes such as duplicate charges, incorrect totals, or invoices that do not match what was ordered.

Invoice approval in larger businesses

Larger businesses may use several employees or departments to approve invoices.

For example, a department manager may confirm that a service was completed, while a purchasing team checks the purchase order and a finance team reviews the invoice before payment.

This can provide greater control over business spending, although a complicated approval process can also create delays if invoices wait too long for the required checks.

What is invoice matching?

Invoice matching is the process of comparing an invoice with other records connected to the purchase.

A business may compare the invoice with a purchase order, delivery record, quotation, contract, or other supporting document to confirm that the charges are correct.

If the information matches, the invoice can move forward more easily. If there is a difference, the invoice may require additional review.

How purchase orders affect invoice approval

Purchase orders are commonly used by businesses to authorise purchases before an invoice is received.

When an invoice arrives, the customer may check the purchase order number, supplier, quantities, prices, and other information against the original order.

If the invoice does not match the purchase order, approval may be delayed until the difference has been explained or corrected.

What happens after an invoice is approved?

Once an invoice has been approved, it can move forward for payment according to the customer's normal payment process.

Approval does not necessarily mean the money is transferred immediately. The invoice may still wait until the agreed payment due date or the business's next scheduled payment run.

The invoice can therefore be approved while still remaining unpaid for a period of time.

What happens if an invoice is not approved?

If an invoice cannot be approved, it may be placed on hold until the problem has been resolved.

The business may need additional information from the supplier, approval from another employee, a corrected invoice, or supporting documents before payment can continue.

Suppliers should ask the customer for the reason when an invoice appears to be delayed during the approval process.

Can an invoice be rejected during approval?

Yes. An invoice may be rejected when the reviewer finds a problem that prevents it from being approved.

Common reasons include incorrect amounts, missing purchase order numbers, duplicate invoices, incorrect billing information, unexpected charges, missing documents, or services that do not match the original agreement.

A rejected invoice can often be corrected and submitted again once the issue has been identified.

Invoice approval vs invoice payment

Invoice approval and invoice payment are separate stages.

Approval means the customer has reviewed the invoice and accepted it for payment. Payment is the later stage when money is actually transferred to the supplier.

Understanding this difference is useful when following up with a customer because an approved invoice may still be waiting for its payment date.

Invoice approval vs client sign off

Client sign off normally confirms that work or a project has been completed and accepted by the customer.

Invoice approval focuses on the billing document itself. A client may approve the completed work but the invoice may still need to pass through an accounts or finance approval process.

For project based work, keeping evidence of client sign off can make it easier for the customer to confirm the invoice relates to completed work.

How suppliers can make invoice approval easier

Suppliers can help reduce approval delays by making invoices clear and complete before sending them. Useful steps include:

• Use the correct customer name
• Use the correct billing address
• Include a unique invoice number
• Add the correct purchase order number when required
• Describe goods or services clearly
• Show quantities and rates
• Check taxes and totals
• Include clear payment terms
• Attach required supporting documents
• Send the invoice to the correct billing contact

Why clear invoice descriptions matter

Clear invoice descriptions make it easier for the person reviewing the invoice to understand what they are being asked to approve.

Instead of vague descriptions, businesses should describe the products, services, labour, materials, or project stages being billed in enough detail to make the charges understandable.

This can help the customer compare the invoice with the original agreement and reduce unnecessary questions during approval.

Keep records of invoice approvals

Businesses may keep records showing when invoices were received, reviewed, approved, rejected, corrected, and paid.

Supporting documents such as purchase orders, quotations, contracts, delivery records, timesheets, and client approval emails can also be kept alongside the invoice.

Organised records make it easier to understand the status of an invoice and investigate problems if a payment is delayed.

Create invoices that are easier to approve

A clear and accurate invoice is easier for customers to review and process.

InvoiceAtlas allows freelancers, contractors, and businesses to create professional invoices with customer information, invoice numbers, dates, item descriptions, quantities, rates, taxes, discounts, payment terms, notes, and final totals.

Once completed, the invoice can be downloaded as a PDF and sent to the customer for approval and payment.