Is accounts payable a liability or an expense?

Accounts payable is a current liability, not an expense. When a company records a vendor invoice, it creates both an AP liability (what's owed) and an expense entry (the cost of goods or services). AP represents the obligation to pay; the expense represents the economic cost. The liability decreases when paid, while the expense stays on the income statement.

How can automation improve the accounts payable process?

Automation reduces manual data entry, catches duplicate invoices, enforces matching rules, and speeds up approval routing. Organizations using automated AP workflows process invoices in under 3 days compared to the 8.2-day average for manual teams. Navan automates the connection between travel bookings and AP by matching vendor invoices to specific trips and cost centers without manual reconciliation.

Is accounts payable a debit or credit?

Accounts payable carries a normal credit balance. When a company receives a vendor invoice, AP increases with a credit entry (and the corresponding expense or asset account is debited). When the company pays the invoice, AP decreases with a debit entry and cash is credited. The credit balance reflects the total outstanding obligation to vendors at any point in time.

What is the AP turnover ratio and why does it matter?

The AP turnover ratio measures how quickly a company pays suppliers, calculated by dividing total supplier purchases by average accounts payable balance over a period. A higher ratio means faster payments and stronger vendor relationships but less cash on hand. A lower ratio preserves cash but risks late fees. Finance teams target a balance between cash flow and payment compliance.

How does accounts payable connect to travel and expense management?

Travel vendors (agencies, hotels, transportation providers) often send consolidated invoices that flow through the AP process. When travel booking data connects directly to AP, each invoice line item automatically matches to the correct traveler, trip, and cost center. Navan integrates booking and expense data with accounting systems, eliminating the manual matching that typically delays financial close for travel-heavy organizations.

How long should it take to process an invoice?

Average invoice processing time is 8.2 days across all organizations, according to Ardent Partners' 2025 benchmarking. Best-in-class accounts payable teams achieve cycle times roughly 79% shorter than their peers. The main bottleneck is exception handling: invoices that don't match purchase orders consume disproportionate staff time and delay payment.

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Accounts Payable

Accounts payable (AP) is the total amount a company owes to suppliers and vendors for goods or services received but not yet paid for, recorded as a current liability on the balance sheet and typically settled within 30 to 90 days.

Victoria Landsmann

•May 28, 2026•

6 minute read

Key Takeaways

Accounts payable (AP) is the total amount a company owes to suppliers and vendors for goods and services received but not yet paid for. AP appears on the balance sheet as a current liability, typically due within 30 to 90 days, and directly affects cash flow planning, vendor relationships, and financial reporting accuracy.

The average organization spends $9.84 to process a single invoice, while best-in-class AP teams achieve processing costs 79% lower through automation and electronic invoicing [1].
Invoice exceptions (where details don't match the purchase order or receipt) average 18.4% across organizations and remain the top driver of AP processing delays and staff costs [1].
The three-way match, comparing purchase order, goods receipt, and vendor invoice, is the foundational control preventing overpayment, duplicate payments, and payment for undelivered goods.
For companies with active business travel programs, AP connects booking data, corporate card transactions, and vendor invoices into a single financial close process.
Navan connects booking, corporate card, and expense data so Accounts Payable teams can match travel invoices to specific trips automatically.

What is Accounts Payable?

Accounts payable (AP) is the aggregate amount a company owes to its suppliers, vendors, and service providers for goods or services already received but not yet paid for. In accounting terms, AP is classified as a current liability on the balance sheet because the obligation is typically settled within one fiscal quarter.

Every business that purchases on credit carries accounts payable. When a company receives an invoice from a vendor, that invoice creates an AP entry until the payment clears. The AP balance at any point represents the total short-term debt owed to outside parties, excluding bank loans and other formal financing.

AP matters to finance teams for three reasons. First, it directly affects cash flow: the timing of AP payments determines when cash leaves the company, and managing that timing is a core function of working capital management. Second, AP accuracy affects financial reporting, since errors like duplicate invoices or misclassified expenses distort the balance sheet. Third, vendor relationships depend on reliable payment. Late payments damage supplier trust and can result in less favorable terms.

What Are the Key Components of Accounts Payable?

Understanding what makes up the AP function helps finance teams identify where process improvements have the most impact.

Component	What It Covers
Invoices	Bills received from vendors. For travel, this might be a monthly consolidated invoice from a travel management company covering hundreds of bookings.
Purchase orders (POs)	Formal commitments to buy goods or services at agreed terms. POs establish what was ordered, at what price, and serve as the baseline for invoice verification.
Payment terms	Agreed schedules like Net 30, Net 60, or 2/10 Net 30 (a 2% discount for paying within 10 days). These terms shape cash flow planning and vendor negotiations.
Three-way match	The control step comparing the PO, goods receipt, and vendor invoice to confirm quantities, prices, and totals align before authorizing payment.

How Does the Accounts Payable Process Work?

The AP workflow follows a predictable sequence from purchase to payment, though the level of automation varies widely across organizations.

1. Purchase request and approval. An employee or department submits a purchase request. For routine spend, this may be a standing order; for travel and expense categories, it's typically a booking through a managed travel platform or a direct vendor arrangement.

2. Purchase order issuance. For PO-based purchases, the company issues a formal purchase order to the vendor confirming the agreed items, quantities, and prices.

3. Goods or services receipt. When the vendor delivers, the receiving team records what arrived. In service-based transactions (consulting engagements, travel bookings), the "receipt" is confirmation that the service was delivered.

4. Invoice capture and coding. The vendor submits an invoice. AP captures the invoice data, either manually or through OCR and AI extraction, and assigns the correct general ledger account and cost center.

5. Invoice matching. AP performs invoice matching: comparing the invoice against the PO and receipt. Discrepancies in quantity, price, or terms trigger an exception that must be resolved before payment proceeds.

6. Payment execution. Approved invoices are batched by due date and paid via ACH, wire transfer, virtual card, or check. Finance teams often time payments to preserve cash while capturing early-payment discounts when available.

7. Reconciliation and close. Payments are matched to invoices in the accounting system. The AP balance decreases, cash decreases, and the transaction is closed. This feeds directly into the monthly expense reconciliation and financial close process.

Accounts Payable vs. Accounts Receivable vs. Accrued Expenses

These three accounting concepts are frequently confused because they all involve financial obligations, but they flow in different directions.

Aspect	Accounts Payable (AP)	Accounts Receivable (AR)	Accrued Expenses
Balance sheet	Current liability	Current asset	Current liability
Trigger	Vendor invoice received	Customer invoice sent	Expense incurred, no invoice received yet
Example	Hotel folio for a team offsite	Client payment for consulting work	Employee salaries earned but not yet paid
Key question	"Who do we owe, and when?"	"Who owes us, and when?"	"What costs have we incurred that haven't been billed?"

The distinction between accounts payable and accrued expenses matters during financial close. AP represents specific, invoiced amounts owed to identified vendors. Accrued expenses are estimates for costs already incurred (utilities consumed, wages earned) where the invoice hasn't arrived. When the invoice arrives, the accrual converts to an AP entry.

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Best Practices for Accounts Payable Management

Accounts payable performance varies dramatically across organizations. Ardent Partners' 2025 benchmarking found that best-in-class AP teams achieve invoice processing costs 79% lower than their peers and cycle times 79% faster, driven by five operational practices [1].

Automate invoice capture. Only 32.6% of invoices are processed without human intervention today [2]. Teams that deploy OCR and AI-based extraction eliminate the manual keying that causes errors and delays. For a detailed look at how automation improves the full AP lifecycle, see this guide to accounts payable automation.

Enforce the three-way match consistently. Invoice exceptions average 18.4% across all organizations [1]. Reducing that rate requires clean purchase order data, timely goods receipt recording, and automated matching rules. Each unresolved exception consumes staff time and delays payment.

Centralize vendor management. Duplicate vendor records are a leading cause of duplicate payments. Maintaining a single, clean vendor master file with validated bank details and tax IDs prevents both fraud and accidental overpayment.

Connect AP to travel and expense data. When a sales team flies to client meetings and the travel management company sends a consolidated monthly invoice covering 200 bookings across 15 cost centers, the AP team must match each line item to the correct traveler, trip, and budget. Companies that integrate their travel platform with AP systems reduce this reconciliation burden significantly. Navan connects booking, corporate card, and expense data so AP teams can match travel invoices to specific trips automatically.

Track AP metrics that matter. The four benchmarks that distinguish high-performing AP teams: cost per invoice, average processing cycle time, invoice exception rate, and straight-through processing rate. Measuring and reporting these metrics quarterly creates accountability and surfaces process breakdowns early.

When Should You Consider Alternatives to Traditional AP?

Traditional accounts payable processes work well when invoice volumes are manageable and transactions are straightforward. Several scenarios signal the need for a different approach:

High invoice volumes with low value: When the processing cost (nearly $10 per invoice on average) approaches the invoice amount, the economics favor corporate card programs or virtual cards that bypass the invoice-PO-match cycle entirely.
Frequent travel-related invoices: Companies with high travel spend often find that consolidated TMC invoices create reconciliation bottlenecks. Connecting the travel booking system directly to AP collapses a multi-step manual matching process into an automated workflow.
Late payments despite adequate cash: If vendors regularly receive late payments, the issue is usually process speed rather than available funds. Automated routing and approval workflows can cut average cycle times from 8.2 days to under 3 days for best-in-class teams [1].

General Ledger: The master accounting record where AP entries post to specific liability and expense accounts during financial close.
Purchase Order: The formal authorization document that creates the baseline for AP's three-way matching process, locking in agreed prices and quantities before delivery.
Expense Report: The document employees submit to itemize business expenditures for reimbursement, which feeds into the AP ledger when the company processes reimbursements.

Sources

[1] Ardent Partners, "State of ePayables 2025: AP Benchmarks and Best-in-Class Performance," January 2026. https://payablesplace.ardentpartners.com/2026/01/state-of-epayables-part-nine-ap-benchmarks-and-best-in-class-performance/

[2] Quadient, "Accounts Payable Automation Trends for 2026," 2026. https://www.quadient.com/en/blog/which-accounts-payable-automation-trends-will-matter-most-2026

Frequently Asked Questions About Accounts Payable

Accounts payable is a current liability, not an expense. When a company records a vendor invoice, it creates both an AP liability (what's owed) and an expense entry (the cost of goods or services). AP represents the obligation to pay; the expense represents the economic cost. The liability decreases when paid, while the expense stays on the income statement.
Automation reduces manual data entry, catches duplicate invoices, enforces matching rules, and speeds up approval routing. Organizations using automated AP workflows process invoices in under 3 days compared to the 8.2-day average for manual teams. Navan automates the connection between travel bookings and AP by matching vendor invoices to specific trips and cost centers without manual reconciliation.
Accounts payable carries a normal credit balance. When a company receives a vendor invoice, AP increases with a credit entry (and the corresponding expense or asset account is debited). When the company pays the invoice, AP decreases with a debit entry and cash is credited. The credit balance reflects the total outstanding obligation to vendors at any point in time.
The AP turnover ratio measures how quickly a company pays suppliers, calculated by dividing total supplier purchases by average accounts payable balance over a period. A higher ratio means faster payments and stronger vendor relationships but less cash on hand. A lower ratio preserves cash but risks late fees. Finance teams target a balance between cash flow and payment compliance.
Travel vendors (agencies, hotels, transportation providers) often send consolidated invoices that flow through the AP process. When travel booking data connects directly to AP, each invoice line item automatically matches to the correct traveler, trip, and cost center. Navan integrates booking and expense data with accounting systems, eliminating the manual matching that typically delays financial close for travel-heavy organizations.
Average invoice processing time is 8.2 days across all organizations, according to Ardent Partners' 2025 benchmarking. Best-in-class accounts payable teams achieve cycle times roughly 79% shorter than their peers. The main bottleneck is exception handling: invoices that don't match purchase orders consume disproportionate staff time and delay payment.