Timesheet Exception Flagger: Review Only the Three Timesheets That Are Actually Wrong

The problem this kills

Every pay period a manager with a big hourly team gets handed a wall of timesheets and a hard cutoff. The job is supposedly "review and approve," but the real job is hunting: scrolling past hundreds of perfectly normal rows to find the three that aren't — the person who quietly racked up overtime, the shift that ran past midnight and split weird, the employee who logged six hours when they were scheduled for eight, the double shift nobody flagged, the holiday that got paid at the wrong rate.

Eyeballing every row is slow, it's mind-numbing, and it's exactly the kind of work where tired eyes miss things. Miss an exception and you've overpaid, underpaid, or broken an overtime rule — and you find out when payroll has already run. You don't need to read every timesheet to find the broken ones, and you don't need to be a developer to build something that does the hunting for you.

What you'll build

A simple internal web tool. You import two things: the period's hours (a CSV or Google Sheet from your time clock) and the schedule for the same period. The tool compares actual hours against the schedule and against the rules you care about, then shows you a short, ranked exception list — only the timesheets that tripped a rule: overtime over your threshold, hours too far under schedule, double shifts, shifts that span midnight, time logged on a weekend or holiday. Everything that's clean passes through automatically but stays on the record.

For each exception you disposition it: approve it as-is, send it back to the employee/supervisor, or edit it with a reason. Every disposition is reversible right up until you lock the period, and every action is logged. When you lock, the tool exports a clean approved set in the exact columns your payroll system expects, plus a full exceptions log of what was flagged and how you handled it.

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 — what your time clock exports, the exact column names in your hours and schedule files, how you identify an employee, your overtime and break rules, what "too far under schedule" means to you, your pay-period shape, which days are weekends/holidays, and your messiest edge cases — and then it tailors the data model, the rules, and every later step to your answers. This is not a generic template: the agent reads a short spec back to you and waits for your thumbs-up before it builds anything.

From there it walks the agent through importing the hours and the schedule, the rule-based exception detection, the ranked exception list, the manager disposition screen with a reverse-until-lock guarantee, the lock step, and the approved-set + exceptions-log export — each step with a ready-to-copy prompt. There's also a fallback so you can build and run the whole thing today off your two CSVs, with no integration to your time or payroll system.

The governance it includes (this is the point)

This is payroll-adjacent tooling, so it ships with the controls a real team needs: login so only your managers can use it, row-level security so each person only ever sees their own organization's data, a complete audit trail of who flagged, dispositioned, edited, and locked what and when, and a hard human-in-the-loop gate — the rules only draft the exception list, a manager decides every flagged item, and nothing is committed to the approved set until a person dispositions it and locks the period. Duplicate guards keyed on employee + period + exception type mean the same problem can't be raised or processed twice, and non-flagged timesheets still land in the audit trail so "we never looked at it" is never true.

Who it's for

Shift managers, store and warehouse leads, and payroll coordinators who own approval for large hourly teams and lose the whole cutoff window separating the normal from the not-normal. If you can describe the rules you use to decide a timesheet looks "off," you can build this.

You've got this — start with the plan, paste the first prompt, answer the interview, and you'll watch your wall of timesheets shrink to the short list that actually needs you, the same afternoon.