A payroll-card business case can look impressive simply because its comparison is drawn badly. If the old column includes all payroll administration but the new column includes only a card-program invoice, the result is an accounting mismatch. Before asking how much a change saves, decide which activities the change can actually affect.
Fintwist is now Corpay Prepaid. Corpay markets PayCard as a payroll-distribution option and describes potential reductions in check and administrative costs. Those are hypotheses to examine against a specific employer’s process. They do not supply the quantities, contract terms or operating evidence needed for this model. FlexCard is a separate disbursement product; do not reuse its terms in a wage-payment comparison.
Draw a boundary around distribution
For a first model, start after an approved net-pay amount exists and stop when the distribution has been reconciled. Timekeeping, gross-to-net calculation and tax reporting remain outside unless the proposal genuinely changes them. Write those exclusions beside the model so that a later reviewer does not mistake a narrow distribution comparison for the total cost of payroll.
Include printing, envelopes, postage, distribution labor and verified exception handling inside the boundary when relevant. For the proposed method include setup work, recurring administration, provider charges, employee communication, reconciliation and any retained paper process. A zero invoice for one service is not evidence that all these activities take zero time.
A fictional baseline
Suppose an employer issues 100 paper checks in each of 26 annual runs. In this teaching example, materials and delivery cost $1.10 per check, processing takes 3 minutes per check, and the planning value of staff time is $30 per hour. Annual distribution volume is 2,600 checks. Direct outlay is $2,860. Time is 130 hours, valued at $3,900. The modeled combined cost is $6,760.
None of these inputs is a Corpay price or an industry benchmark. The arithmetic is useful because every unit is visible. The $3,900 time value is also not automatically a cash saving: if staffing and paid hours remain unchanged, recovered time is capacity for other work, not a reduction in payroll expense.
Keep three totals rather than one
- Cash spending: invoices and purchases that actually rise or fall.
- Staff capacity: measured hours that could be reassigned, valued under an explicit planning assumption.
- Transition spending: one-time work and purchases needed to make the change.
Compare each category separately before showing a combined planning total. Do not include an avoided check fee in both a per-check rate and an exception allowance. Do not count a task as eliminated if it moves from the central office to a store manager. The boundary should follow the work, not the department that owns the budget.
A reviewer should be able to answer one final question: if the organization stays with its present payment mix, which of these costs would still occur? That counterfactual keeps the baseline anchored to the actual decision instead of turning every existing expense into an imagined saving.
A boundary test with two departments
Imagine the payroll office reports that a new method eliminates 40 hours of annual distribution work. Store supervisors then spend 25 additional hours explaining the process and resolving ordinary questions. Within the payroll-office boundary, recovered capacity is 40 hours. Within the employer-wide boundary, it is 15 hours before any other changes. Neither figure is inherently wrong, but presenting the first as an organization-wide result would be misleading. State the organizational boundary just as clearly as the activity boundary.
Now suppose the employer also replaces its timekeeping system during the same project. The new system saves 100 hours in collecting time records. Those hours belong to a separate causal claim unless the payment-method change was genuinely necessary to obtain them. A combined project can have a combined business case, but it should still show which component produces each effect. Otherwise a weak distribution proposal can appear attractive by borrowing benefits from an unrelated improvement.
Test the counterfactual
For each line, ask what happens if the decision is postponed for one year. Would the expense still be paid? Would the staff task still occur? Would a separate contract renewal remove it anyway? If an invoice was already due to disappear because of another project, it is not a benefit created by this proposal. This test also catches sunk costs: money already spent cannot be recovered merely by selecting a different future payment method.
Write a short reconciliation from the wider payroll budget to the narrow model. For example, the budget includes payroll processing, tax services and distribution, but the model includes only distribution changes. The reconciliation does not need to disclose sensitive employee information. It needs to show why the model is smaller than the budget and why its exclusions are reasonable. That lets a finance reviewer trace the decision without mistaking a deliberate boundary for an omitted cost.
The strongest baseline is not the largest one. It is the smallest complete representation of the activities the decision can change, with a separate note for important effects outside the financial calculation. Keep legal requirements, payment reliability and worker access visible even when they are not assigned a dollar value.