Accounts payable

Accounts payable (AP) affects cash flow, supplier relationships, internal controls, and financial reporting. Most of the time, it runs in the background. Problems only become visible when payments are delayed or numbers are wrong.

What is accounts payable?

If your company buys anything on credit, you have accounts payable.

Every time a supplier sends an invoice, AP steps in to:

• Confirm the invoice is legitimate

• Verify pricing and terms

• Ensure the cost is allocated correctly

• Route it for approval

• Schedule payment

• Record the transaction in the ledger

Accounts payable is a financial control function, not just an invoice workflow.

Think about it this way: revenue brings money in. AP decides how and when money goes out. That balance shapes your liquidity and stability.

The core components of AP

A typical accounts payable process includes:

• Invoice intake: Collecting invoices from email, EDI, or paper

• Matching and validation: Checking invoices against purchase orders and receipts

• Coding: Assigning GL accounts, departments, or projects

• Approval workflows: Ensuring the right people authorize spending

• Payment execution: Paying by bank transfer, virtual card, check, or other methods

• Reconciliation: Keeping supplier balances aligned with your records

When these steps are clearly defined, AP runs quietly in the background. When they are not, you’re stuck correcting errors, dealing with delays, and managing strained vendor relationships.

Why accounts payable matters

AP is often seen as administrative. In practice, it directly affects cash flow, reporting accuracy, and supplier relationships. Here's why accounts payable is important:

• Cash flow control: If invoices are paid too early, you tie up cash unnecessarily. If they are paid too late, suppliers may impose penalties or tighten terms. A structured AP process helps you balance obligations with liquidity needs. This directly affects working capital.
• Reliable financial reporting: Every invoice feeds into your financial statements. If expenses are misclassified or posted late, your profit and loss statement becomes distorted. Accurate AP improves the reliability of financial reports.
• Risk management and internal control: AP is a common entry point for fraud, duplicate payments, and policy violations. Clear approval hierarchies, separation of duties, and systematic validation reduce risk significantly.
• Supplier relationships: Suppliers remember how you pay. Consistent, predictable payments strengthen trust that can translate into better payment terms, priority service, or flexibility during supply disruptions.

Examples of accounts payable

Every operating business generates ongoing costs, regardless of growth or expansion.

Common AP examples include:

1. Inventory purchases

A retail company receives $250,000 worth of inventory with 30-day payment terms.

• Inventory increases on the balance sheet.

• Accounts payable increases by $250,000.

• Cash does not move until payment is made.

This is a standard trade payable.

2. Professional services

A law firm invoices your company $18,000 for contract review work.

• The legal expense is recorded on the income statement.

• Accounts payable increases until the invoice is paid.

This is a service-based payable rather than a goods purchase.

3. Packaging materials

A manufacturer receives a $95,000 invoice for packaging materials used in distribution.

• Inventory increases.

• Accounts payable reflects the unpaid supplier balance.

Packaging costs often fluctuate with raw material prices, making accurate AP tracking important for margin control.

4. Utilities and rent

You receive invoices for electricity, internet, or office rent. Even though these are routine expenses, they still create liabilities until payment is made.

5. Capital expenditures

A manufacturer receives a $120,000 invoice for new production equipment.

• The asset is capitalized on the balance sheet.

• Accounts payable increases for the same amount until paid.

Not all AP transactions hit the income statement immediately. Some increase assets.

How the accounts payable process works

The exact process varies by organization, but most AP workflows follow the same logic. Here's what the main steps in the accounts payable process look like:

Step 1: Capture the invoice

Receiving the invoice and entering the invoice data in a financial system is the first step in the  accounts payable process. This can be done manually or automatically.

Step 2: Validate and match

Before anything is approved, the invoice must be verified.

For purchase order-based invoices, this means matching:

• Purchase order

• Goods receipt

• Invoice

If the numbers do not align, the discrepancy must be resolved before payment.

For non-PO invoices, validation relies more heavily on managerial approval and budget checks.

Step 3: Code and allocate

Each invoice needs to be assigned to the correct general ledger account and, where relevant, department, cost center, or project.

For example:

• A software subscription for the Sales team should hit Sales operating expenses.
• Office renovations might require capitalization instead of being treated as a regular expense.

Accurate coding determines how costs appear in reports.

Step 4: Approve

Approval workflows should reflect your internal controls.

Small recurring invoices may require only department-level approval. Larger or unusual expenses may require approval from the CFO.

Step 5: Pay and record

Once approved, the invoice is scheduled for payment according to agreed terms.

The transaction is then posted to the ledger and later reconciled with bank statements.

That final reconciliation step ensures nothing slips through the cracks.

The common pain points in accounts payable

If you ask finance teams where friction appears, the answers are surprisingly consistent:

• Invoices stuck in email threads

• Manual data entry errors

• Duplicate payments

• Chasing approvals

• Limited visibility into invoice status

• Month-end reclassifications

These issues usually show up when the process is still manual but the business has grown.

How to improve your accounts payable process

Improving your accounts payable process is about reducing manual work, tightening controls, and increasing visibility over outgoing cash.

Here are practical ways to do it:

• Automate invoice data capture: Replace manual entry with automated extraction to reduce errors and speed up processing.

• Standardize approval workflows: Route invoices automatically based on department, amount, or expense type. This removes back-and-forth emails and approval delays.

• Prevent duplicate and invalid payments: Use system checks to flag duplicate invoice numbers, mismatched amounts, or unauthorized vendors before payment is released.

• Increase real-time visibility: Give finance and budget owners clear insight into invoice status and outstanding liabilities at any point in time.

• Maintain a complete audit trail: Ensure every action, from receipt to payment, is documented and traceable.

These improvements reduce approval delays and manual corrections. Finance can then focus on spend analysis and cash management.

Automating accounts payable with Rillion

At Rillion, the focus is on making AP feel controlled instead of chaotic .

Rillion’s AP automation solution helps you:

• Centralize all invoices in one system

• Automatically extract and validate invoice data

• Apply intelligent coding suggestions 

• Enforce approval hierarchies

• Prevent duplicate payments with powerful 3-way matching

• Integrate with your ERP

When AP runs smoothly, finance teams gain something that is often underestimated in this function: peace of mind.

And when you trust your AP process, you can shift your attention from processing invoices to improving how your business manages cash, suppliers, and spend.