---
title: "Tax deadlines at Cornerstone CPA"
description: "A worked example for a $2.1M accounting practice: missed deadlines in a spreadsheet system, and the numbers a deadline dashboard has to hit."
doc_version: "2026-05-20"
last_updated: "2025-01-15T10:00:00.000Z"
canonical_url: https://www.lightforgeworks.com/blog/cornerstone-cpa-case-study/
---

# Tax deadlines at Cornerstone CPA

# Tax deadlines at Cornerstone CPA

Cornerstone CPA Services is a composite company: a $2.1M accounting practice with 1,250 clients. The workflow and the failure points are real patterns; the company and the numbers are illustrative.

## The problem

Deadline tracking runs on spreadsheets. In twelve months the practice missed three filing deadlines, paid $8,000 in IRS penalties, and lost $45,000 in revenue when clients left. Coordinating deadlines eats 15 to 20 staff hours a week, and 23 percent of clients end up on emergency extensions.

The managing partner wanted a fix before the next tax season, without a long software implementation.

## The build

A tax deadline dashboard. One screen holds every client deadline: a color-coded calendar, automated email and SMS reminders, progress tracking per client, and mobile access for the partners. It reads from the QuickBooks and tax software already in place. Ten weeks to build. The practice's team spent about ten hours on it.

## The numbers it would have to hit

- Missed deadlines: three in twelve months down to zero
- Deadline management cost: down 28 percent
- Peak-season capacity: up 18 percent with no added staff
- Client satisfaction: 78 percent to 94
- Client retention: 98 percent against an 87 percent industry average
- Three-year ROI: 285 percent

[Read the full walkthrough →](/blog/cornerstone-cpa-case-study-full)

## Interactive Demo

<div class="solution-embed">
  <iframe src="/static/demos/cornerstone-cpa/cornerstone-cpa-demo.html" width="100%" height="600" frameborder="0" style="border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.1);"></iframe>
  <p style="text-align: center; margin-top: 10px; font-style: italic; color: #666;">Interactive demonstration of the ForgeWorks Tax Deadline Dashboard</p>
</div>

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