An HR manager puts someone on a performance plan in January. The follow-up is supposed to happen in 90 days. There's nowhere in ADP to log that note and set a reminder — so they put it in a spreadsheet, or a sticky note, or a task in their personal to-do app. April comes, the reminder never fires, the follow-up doesn't happen, and now there's a liability exposure if the termination is ever challenged. The complaint is precise: 'I would like to see ADP add functionality to allow me to set employee notes and follow-up reminders for pre-configured and ad hoc events and milestones.'
ADP doesn't build this because notes and reminders are low-status features that don't appear in enterprise sales demos. ADP sells on payroll accuracy, compliance coverage, and benefits administration — not on whether HR managers can leave themselves a reminder about a probationary check-in. The people who need this feature (HR generalists, HR business partners) are not the people who sign the ADP contract. So the complaint never becomes a buying signal.
What's needed is a lightweight HR case notes tool that pulls employee records from ADP (name, ID, department, manager) via read API, lets HR staff log time-stamped private notes against any employee record, attach reminder dates, tag note types (performance, compliance, compensation review, onboarding milestone), and get email or Slack alerts when a reminder fires. Notes should be visible only to the HR team member who created them or to a defined group — not to managers or the employee themselves.
The retention and compliance angle is what makes this a business rather than a feature someone's IT team hacks together. When a termination is contested, HR needs a documented, time-stamped record of every conversation, warning, and missed follow-up. A spreadsheet doesn't hold up. A tool with audit-log-grade timestamps and a clear chain of custody does. That's a legal risk argument, not a convenience argument, and legal risk arguments unlock budget.
The need recurs every time a new employee is hired, every performance cycle, every disciplinary conversation. Mid-market HR teams of 3–10 people managing 300–1,500 employees have dozens of open threads in their heads at any moment with no reliable system to track them.
What to build
Build a web app that authenticates HR admins via SSO, pulls employee rosters from ADP Workforce Now via read API, and provides a private note-logging interface per employee with reminder scheduling, note-type tagging, and email/Slack delivery of reminders — with a full immutable audit log showing who wrote what and when.
Where to start
Start with companies that have recently gone through an employment dispute or termination challenge where the lack of documentation was cited — those HR directors have a fresh, specific memory of what the gap cost them and will pay to prevent a repeat.
The hard part
The hardest early problem is that HR generalists have buying authority over almost nothing — they'll love the product and have no budget code to pay for it, so every deal requires either a sympathetic HR director or a reframe as a compliance/legal risk tool to get it in front of someone with a budget.
How it makes money
Per-seat monthly fee charged per HR team member (not per employee), since the notes are written by HR staff — e.g., $25–40/seat/month — with a minimum of 3 seats to avoid single-user accounts that churn.
See the evidence. The complaints behind this idea, the products they came from, and similar ideas in Core HR.
More ideas in Core HR