Auto Dealership Saves $2,000/Month with Enhanced Data Interchange Optimization

The Challenge

Rachel W. is the Finance Director at a mid-size auto dealership that operates both a retail sales floor and a wholesale parts department. The dealership processes roughly $300,000 per month in card transactions across both divisions, with the parts department accounting for approximately 40% of that volume — almost entirely B2B transactions paid with corporate purchasing cards.

The dealership's previous processor charged a bundled rate of 2.85% across all transaction types. Rachel's team had limited visibility into what was happening beneath that rate, and no understanding of how interchange qualification was affecting their costs. Critically, the processor was not submitting Level II or Level III enhanced data on B2B transactions.

Without enhanced data submission, every corporate card transaction in the parts department was downgrading to the highest interchange tier — Visa Commercial Standard, which carries rates of 2.50% to 2.95%. For a department doing $120,000/month in B2B volume, the interchange cost alone was $3,000–$3,540 per month before the processor's margin was even added. Rachel knew there had to be a better way, but her processor offered no solution and little explanation.

The Solution

PaySec's solution focused on two areas: interchange optimization through enhanced data submission and transparent pricing through Network Offset Pricing.

For the B2B parts department, PaySec implemented automated Visa Commercial Enhanced Data Program (CEDP) submission. This means that for every corporate card transaction, PaySec automatically submits Level II data (tax amount, customer code, merchant postal code) and, where applicable, Level III line-item detail (product descriptions, quantities, unit costs). This additional data allows transactions to qualify for the lowest available commercial interchange tiers — typically 1.50% to 1.90% instead of the 2.50%+ standard rate.

The enhanced data submission is fully automated. The dealership's existing DMS (Dealer Management System) feeds transaction details to PaySec's gateway, which formats and submits the required fields with each authorization. No manual data entry is required from the parts counter staff.

For the retail sales side, PaySec replaced the bundled rate with Network Offset Pricing. Consumer transactions now pass through at wholesale interchange with a transparent, predictable margin. Rachel's team can see exactly what every transaction costs, broken down by card type and interchange category.

The Results

The impact was immediate and significant. In the first full month, the parts department's effective interchange rate on B2B transactions dropped from an average of 2.65% to 1.65% — a reduction of roughly one full percentage point. On $120,000 in monthly B2B volume, that translates to approximately $1,200 per month in interchange savings alone.

Combined with the Network Offset Pricing improvements on the retail side, the dealership's total monthly savings exceeded $2,000. Over 12 months, the projected annual savings are more than $24,000 — money that goes directly to the dealership's bottom line.

The enhanced data submission also improved Rachel's relationships with B2B customers. Several fleet and body shop accounts had been pushing for better pricing on parts orders. Because PaySec's CEDP submission reduces the dealership's cost to accept those corporate cards, Rachel was able to hold pricing steady rather than passing costs through — strengthening those commercial accounts.

The transparency of the new setup changed how the finance team manages payment costs. Monthly statements now break down every transaction by interchange tier, card type, and department. Rachel uses this data to forecast costs accurately and identify trends — like shifts in card mix or seasonal volume changes — that affect the bottom line.