A vendor proposal is not an ROI calculation. Approval should depend on your measured operating baseline, not a savings promise.

A full-service vending ROI calculation starts with a measured baseline for attendance, paid off-site time, stockouts, subsidies, waste, and management labor. Monthly net savings equal current monthly break room costs minus projected monthly program costs. Payback period equals one-time implementation cost divided by monthly net savings. Recalculate the same inputs at 30, 60, and 90 days to validate the projection.

How to Run a Full-Service Vending ROI Calculation

Use one four-week period for every baseline field. Label each value as measured, projected, or vendor-supplied so finance can see where the result comes from. Our team at Delio coordinates vending, micro markets, smart coolers, fresh food, coffee, water, and pantry programs across the Dallas-Fort Worth metroplex.

Employee making a cashless payment at a workplace vending machine

A cashless payment event supplies a transaction timestamp, but it does not establish labor savings without a measured baseline.

  1. 1. What four-week baseline should you freeze?

    Start with actual onsite employee-days rather than roster headcount. Record scheduled headcount separately from onsite attendance and actual break room users. This prevents hybrid schedules, absences, and shift patterns from inflating the population that can use the program.

    • Actual onsite employee-days: employee-days during the four-week period
    • Break room users: unique or observed users during the same period
    • Scheduled headcount: a reference value, not the primary usage input

    The broader full-service vending ROI framework explains why usage, availability, and management time belong in the business case. This worksheet turns those categories into fields you can calculate.

  2. 2. Which off-site trips should count?

    Count only trips the proposed onsite program can realistically replace. Do not count an employee's entire break as savings. Measure the paid minutes created by leaving the site beyond the break time that employee would take anyway.

    • Formula: avoidable trips per month × avoidable paid minutes per trip ÷ 60 × fully loaded hourly labor cost
    • Unit: dollars per month

    Use the fully loaded hourly labor cost approved by finance. Keep the trip count and minutes visible as separate inputs so reviewers can test either assumption without rebuilding the model.

  3. 3. How should stockouts enter the model?

    Record stockout impact as affected users or incremental minutes per month. Use one method consistently throughout the baseline and validation periods. A stockout that causes an off-site trip should not create a second labor-cost entry.

    • Record the date, shift, and unavailable category.
    • Count incremental minutes only when they are not included in the off-site trip field.
    • Track unserved demand separately from employer spending.

    This keeps availability visible without overstating the benefit. It also gives you a direct operating measure to compare with the vendor's item movement and replenishment records.

  4. 4. Which current costs belong in the baseline?

    Add internal management labor, employer-purchased inventory, waste, current subsidies, repairs, mileage, and other recurring costs. Management labor includes ordering, shopping, receiving, stocking, invoice handling, complaint management, and service coordination. Multiply those monthly hours by the fully loaded hourly labor cost.

    Keep employee purchases separate because they are not employer program costs. If you are replacing an employer-funded pantry, compare managed vending versus pantry costs and document what your team still handles under the current office pantry program.

    • Current monthly break room cost: off-site labor + management labor + employer inventory + waste + subsidies + other recurring costs

  5. 5. What belongs in the projected full-service cost case?

    List vendor fees, projected employer subsidies, retained management labor, projected waste, and other employer-paid recurring costs. A managed vending service can shift installation, stocking, cleaning, service calls, and maintenance away from the internal team. The proposal should state which responsibilities actually transfer.

    Build conservative, expected, and break-even cases. Change only projected assumptions between the three cases. Keep the measured baseline fixed so the full-service vending ROI calculations remain comparable.

    • Projected monthly program cost: vendor fees + projected subsidy + retained management labor + projected waste + other employer-paid recurring costs
    • Break-even point: the assumption at which projected monthly cost equals current monthly cost
    Route driver restocking a workplace smart cooler

    A restocking visit should create two audit points: the service date and the item-level replenishment record.

  6. 6. How do you calculate savings, ROI, and payback?

    Run the formulas in order. Monthly net savings come first because annual savings, payback, and first-year ROI all depend on that result. A negative or zero monthly result means the current assumptions do not support financial approval.

    • Monthly net savings: current monthly break room cost − projected monthly program cost
    • First-year net savings: monthly net savings × 12 − one-time implementation cost
    • Payback period: one-time implementation cost ÷ monthly net savings
    • First-year ROI: first-year net savings ÷ one-time implementation cost × 100

    Use only employer-paid electrical work, construction, data connections, or internal launch labor in the one-time implementation field. If the employer has no one-time implementation cost, report monthly and annual net savings instead of forcing a payback period or percentage ROI.

  7. 7. How should you validate the projection after launch?

    Set the review dates before approval. Require the vendor to provide transactions by day and shift, participation data where available, item movement, stockouts, restocking dates, service-ticket timestamps, fresh-food waste records, and subsidy totals. Put reporting access and issue ownership among the vending contract terms to review.

    • Day 30: Confirm that transaction, active-user, stockout, service-ticket, and subsidy data are available. Check coverage across operating hours and shifts.
    • Day 60: Compare actual usage and off-site trips with the baseline. Review repeated stockouts, expired food, assortment changes, and retained management hours.
    • Day 90: Recalculate monthly net savings using actual program costs. Document the variance from the projection and assign corrective actions.

    Do not annualize incomplete data at day 30. Correct missing measurements first. The day-90 calculation becomes the operating case for the next review period.

If your worksheet supports a managed program, contact Delio for a free assessment. We can recommend a setup based on headcount, traffic, budget, operating hours, and desired variety.

Written by Cindy Petez, Delio Team