When you are testing one or two people a month, logistics are easy. When you are hiring across multiple locations, onboarding seasonal crews, or running a random program across hundreds of employees, the administration becomes the hard part. The screening itself is simple; keeping it stocked, paid for, and tracked is where programs stall. Prepaid kit bundles and card-on-file billing exist to solve exactly that.

Why per-visit billing breaks down at scale

Paying per clinic visit works for a one-off, but at volume it creates friction: inconsistent pricing, a stack of small invoices, delays while approvals clear, and no clean way to see how much you have tested. Every one of those is a place where a hiring manager gives up and skips a test. A program only protects you if people actually use it, so removing friction is not a convenience — it is what makes the program real.

How prepaid bundles work

A prepaid bundle is exactly what it sounds like: you buy screening capacity up front in a quantity that fits your hiring plan, and you draw it down as you test. The benefits are practical:

Predictable cost: you lock in a per-kit price and know your screening budget in advance.
No approval lag: the capacity is already purchased, so a manager can screen a new hire the same day without routing an invoice.
Inventory on hand: kits are ready when you need them, including for post-incident and reasonable-suspicion events that cannot wait.
Clean reporting: one account, one balance, one view of what you have used.

Where card-on-file fits

Card-on-file complements bundles by removing the payment step from every individual order. You securely store a payment method once, and replenishing capacity or covering an occasional overflow test happens automatically — no re-entering card details, no waiting on accounts payable for a small charge. For distributed teams, this means a location manager can keep testing without ever touching billing. It also makes recurring or random programs effortless: capacity tops up as you draw it down.

Security matters here. A well-run program stores payment credentials with a trusted processor rather than in a spreadsheet, so convenience never comes at the expense of data safety.

Card-on-file also shines for programs that run on a cadence. If you screen new hires weekly, or draw down a random pool every month, you do not want to think about payment each cycle. A stored method quietly keeps capacity topped up so the program runs itself. The manager places the order; billing simply happens in the background, and finance sees one clean, predictable account instead of a scatter of tiny charges to reconcile.

A workflow that actually scales

Put together, a scalable employer program looks like this:

Open one employer account for your whole organization.
Purchase a prepaid kit bundle sized to your hiring forecast, and add a card on file for automatic replenishment.
Distribute kits to the locations or managers who need them.
Track usage, balances, and results from a single secure portal.

That is the whole program. No invoice chasing, no per-site pricing negotiations, no gaps when a surprise post-incident test lands on a Friday afternoon.

Right-sizing your bundle

You do not have to guess perfectly. Estimate your annual hires, add a buffer for random and post-incident testing, and start there — you can always replenish. The goal is to keep enough capacity on hand that no manager is ever blocked, while card-on-file quietly handles the refills. Over a couple of cycles you will settle into the right reorder rhythm.

The takeaway

At scale, the enemy of a good screening program is friction, not cost. Prepaid bundles make budgeting predictable and testing instant; card-on-file makes replenishment invisible. Together they let you run a serious program without a serious administrative burden. Ready to scale? Set up your employer account and order your first bundle with LabX.

Prepaid Kit Bundles and Card-on-File: How to Run Employee Screening at Scale