Payroll Funding Checker: Confirm the Cash Is There Before You Release the Run

The problem this kills

Every payroll run is really a bank withdrawal — usually the biggest one your business makes all month. Your provider doesn't pull just the net pay that lands in employees' accounts. It pulls the tax withholdings, your employer-side taxes, and its own service fees, all on a debit date that may be a day or two before payday. If the cash isn't sitting in the account on that date, the debit bounces — and a bounced payroll is a catastrophe: late employees, NSF fees, a frozen provider relationship, and a very bad day for whoever signed off.

So how do most teams check this? They eyeball the net-pay number from the provider's preview, glance at online banking, and hope. They forget the employer taxes. They forget the per-run fee. They check yesterday's balance instead of the balance on the debit date, after that big supplier ACH clears. The math that protects the company from its single largest recurring withdrawal is done in someone's head, thirty seconds before they click "submit."

A pre-run funding check deserves to be a real, governed tool. Add up everything the run will pull, compare it to the cash that will actually be there on debit day, and refuse to let anyone release a run that's short.

What you'll build

A simple internal web app for your controller and finance team. Before each payroll is released, you import the draft totals from your provider's preview — net direct deposits, tax withdrawals, employer taxes, and the provider's fees. You enter (or import) the available or expected bank balance for the debit date, and you tell the tool when the provider actually debits so it checks the right day's cash.

The tool sums the total cash requirement across every component, compares it to available funds, and flags a shortfall the instant the numbers don't cover the run. The controller reviews the requirement-versus-available picture and approves "cleared to fund" — and a shortfall blocks that approval, so an underfunded run can't be waved through. Approval writes a permanent funding-summary record, and you export a clean cash-requirement CSV for the file or the treasury hand-off.

What's inside the Implementation Plan

The downloadable plan is a step-by-step file you paste into an AI coding agent. It opens by interviewing you about your business — who runs payroll and approves funding, which provider and bank you use, how your draft-totals export is actually shaped and named, your pay cadence and typical and peak amounts, exactly when the provider debits relative to payday, and the messy edge cases (off-cycle bonus runs, multiple bank accounts, garnishments and 401(k) sweeps that debit separately, pending deposits you're counting on). It reads a short tailored spec back to you and waits for your thumbs-up before it builds anything — so the checker matches how your payroll actually pulls cash, not a generic template.

From there it walks the agent through the data model, the draft-totals import, the total-cash-requirement engine, the debit-date balance comparison, the shortfall flag, the controller's "cleared to fund" approval gate, the saved funding-summary record, and the CSV export. Every step ends with a ready-to-copy prompt. There's a full "No API yet?" path that runs entirely off a draft-totals CSV and exports the funding summary — so you can build and use the whole thing this afternoon, no matter which payroll provider or bank you're on.

The governance it includes (this is the point)

This tool guards your biggest recurring withdrawal, so the controls aren't optional. The plan builds in login so only your finance team can use it, row-level security so you only ever see your own organization's payroll cash data, a complete audit trail of who imported which totals and who approved which funding decision, a hard human-approval gate where the controller must approve "cleared to fund" before a run is marked releasable — and where a flagged shortfall blocks approval entirely. Duplicate guards mean the same payroll run can't be funded twice, so you can re-import a corrected preview without double-counting.

Who it's for

Controllers, payroll managers, and small-business owners — anyone who signs off on releasing a payroll run and needs to know, not hope, that the cash will be in the account on debit day. If you can pull your provider's draft totals and tell the tool when it debits, you can build this.

You've got this — start with the plan, paste the first prompt, and answer the interview. You'll be running a real funding check before your next pay run.