By the time a budget reaches final review, most of its assumptions are difficult to change. That makes the weeks before the budget lock the perfect time for finance leaders to examine a cost that is often reduced to a bank fee or processing rate: paying vendors.
The visible transaction charge is only the origination cost. The total cost also includes employee time, payment exceptions, vendor enrollment, reconciliation, fraud controls, status inquiries and the technology required to connect payment activity with the accounting system. Eligible rebates may offset part of that total, but only when the payment method, vendor acceptance and program terms align.
A Q4 vendor payment cost audit gives accounts payable (AP) leaders, controllers and chief financial officers a defensible baseline for the 2027 budget. It also creates a fair way to compare the current process with automation: measure the same cost lines on both sides and document every assumption.
A rate answers a narrow question: What does it cost to originate this transaction? It does not answer how much work happens before or after the payment, how often something goes wrong or what controls are required to manage the risk.
Paper checks make the gap easy to see. The Association for Financial Professionals (AFP) reported a median cost of $2.01 to $4 to issue a paper check in its 2022 Payments Cost Benchmarking Survey. That range is a useful comparison point, but it is not a substitute for a company-specific baseline. Check stock, envelopes, postage, printer support, positive pay, approvals, signatures, returned mail and reissues can all change the result.
Electronic methods have their own cost structures. Automated Clearing House (ACH) payments may involve file preparation, validation, return handling and maintenance of vendor bank account information. Virtual cards can create rebate opportunities, but acceptance varies by vendor. The audit should therefore compare complete workflows, not assume one method carries the same economics for every payment.
Start with a full 12 months of payment data, if available, then separate payments by method, business unit and vendor segment. The nine lines below include eight costs and one potential offset. Together, they turn a general conversation about payment expense into a measurable operating baseline.
Count the checks issued, including voids and reissues. Add check stock, envelopes, postage, printer supplies, equipment support and any bank services tied specifically to check issuance. If staff members make trips to collect signatures or mail checks, capture the time and mileage in the staff-touch category rather than hiding it here.
Map each human handoff from an approved invoice to a confirmed payment. Common touches include exporting a file, reviewing a batch, obtaining approval, entering data in a bank portal, printing checks, matching remittance details and updating the enterprise resource planning (ERP) or accounting system. For each touch, multiply the average handling time by touch volume and a fully loaded hourly labor rate (note: if your record uses minutes, remember to convert them to hours before applying the rate). Sampling several payment runs is usually more reliable than depending on memory.
Productivity metrics can help establish a repeatable baseline. As a broader AP productivity indicator, APQC tracks invoices processed per AP full-time equivalent (FTE). Pair that volume measure with payment touch time so higher throughput is not mistaken for a low-cost payment process.
A payment method only works when the vendor can receive it. Measure the time spent contacting vendors, confirming payment preferences, validating bank details, collecting tax or remittance information and updating records when contacts or accounts change. Separate initial enrollment from ongoing maintenance. Otherwise, a one-time migration effort can distort the recurring run rate.
Track the percentage of payments that leave the standard path and the average time required to resolve them. Exceptions include rejected ACH entries, virtual card acceptance issues, stale addresses, duplicate payments, approval gaps, returned checks and remittance mismatches. Add direct fees for stops, returns or reissues. A low transaction rate can be expensive when the exception rate is high.
Measure the hours required to match payment activity to open payables, clear bank activity, resolve differences and close the period. Include manual downloads, spreadsheet manipulation, journal entries and follow-up with business units. Record the time separately during a typical week and during month-end or quarter-end close, when volume and urgency may be different.
The Federal Reserve notes that remittance information is often unstructured and detached from the payment, making retrieval a largely manual process.
Fraud prevention is not an optional add-on to the cost model. Include positive pay, ACH validation, dual approvals, callback procedures, account monitoring, employee training and the time spent reviewing alerts or changing access. AFP reported that 76% of surveyed organizations experienced attempted or actual payments fraud in 2025. Checks remained the payment method most affected, reported by 58% of respondents. The Federal Reserve’s Check Fraud Mitigation Toolkit also identifies time-consuming, manually intensive remediation as an operational cost of check fraud.
The audit should capture the cost of controls rather than assign a speculative dollar value to a breach that did not occur. It should also note where manual workarounds bypass the designed control environment. That keeps the model credible while showing whether the current workflow adds exposure.
Vendor questions create work even when the payment itself was correct. Count calls and emails asking whether a payment was approved, sent or received. Estimate average handling time and include the effort required to search multiple systems. Also record the leading causes. Inquiries driven by limited visibility may point to a process issue that a per-transaction fee will never reveal.
Payment operations depend on connections among the ERP, accounting software, bank portals and reporting tools. Capture internal information technology (IT) hours, outside consulting, connector fees, file-format changes, failed jobs, testing and upgrades. Separate recurring support from implementation costs. A future-state comparison should do the same so the business case does not treat current technology as free and new technology as entirely incremental.
Treat rebates as an offset. Use actual or conservatively estimated payment volume that is eligible for a rebate-earning method, then account for vendor acceptance and program terms. Keep gross costs visible before subtracting earned rebates. That lets reviewers understand whether an improvement comes from lower operating cost, rebate income or both.
Once the nine lines are measured, summarize them at the annual level and calculate a cost per payment for each method. The basic model is straightforward: add direct transaction costs, labor, risk and control costs and technology expenses, then subtract earned rebates. The discipline lies in defining the inputs consistently.
Use the following practices to keep the model useful during budget review:
The resulting baseline should answer more than “What does a payment cost?” It should show which methods create the most work, which vendors generate the most exceptions and which costs will change if payment volume grows. Those findings give budget owners a practical sequence for improvement.
A credible automation business case applies the same measurement framework to the current and proposed operating models. If the current baseline includes staff time, controls and integration maintenance, the future-state estimate must include them too. If rebates appear in the future state, they should reflect realistic vendor eligibility and acceptance rather than total payment volume.
The comparison should also test operational fit. Ask how vendor enrollment will be handled, which payment methods are supported, what happens when a payment fails, how reconciliation data returns to the accounting system and when a person takes over an exception. Automation can reduce routine work, but accountability still matters.
REPAY Vendor Payment Automation is designed to connect with existing accounting software or an ERP and support vendor payments through methods including virtual card and ACH. REPAY Payments Specialists can assist with vendor enrollment and payment management, while realtime reporting can support reconciliation and payment visibility. Those capabilities should be evaluated against the gaps found in the audit.
The most useful Q4 vendor payment cost audit does not produce a universal benchmark. It produces a transparent view of how the organization pays vendors today, where time and risk accumulate and which costs could change under a different operating model.
Complete the baseline before the budget locks. Then use it to prioritize the payment methods, vendor groups and workflow steps with the clearest operational case for change. When each assumption is visible, finance leaders can assess vendor payment automation based on evidence instead of headline rates.
Ready to compare your current vendor payment process with a more automated approach? Explore REPAY Vendor Payment Automation and speak with a payment expert about the cost lines your audit uncovers.
The total cost includes the transaction charge plus check supplies and postage, staff touches, vendor enrollment, exception handling, reconciliation, fraud controls, payment status inquiries and integration maintenance. Eligible rebates should be shown separately as an offset to gross cost.
Add annual direct transaction costs, labor, controls and technology expenses. Subtract rebates actually earned, then divide the result by the number of completed vendor payments. Calculate the figure by payment method as well as in total so expensive workflows are not hidden by an average.
A processing rate measures transaction origination. It usually does not capture the employee time, exceptions, reconciliation, vendor questions, fraud controls or systems work required to complete and account for the payment. Those costs can materially change the economics of each method.
Track payment volume by method, staff touches, average touch time, exception rate, exception-resolution time, vendor enrollment effort, reconciliation hours, status inquiries, fraud-control expense, integration support and earned rebates. Record the source and owner for every assumption.
Virtual card and ACH rebates can offset payment operating costs when a vendor accepts the method and the transaction qualifies under the program. Model only eligible, accepted volume and applicable terms. Keep gross cost and rebate income separate so the return on investment is not overstated.