Case Study

Expensify

2023 Live 4 months 1 Dev Expense Management

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Overview

A comprehensive expense management and invoicing system with expense tracking, automated invoice generation, budget management, and financial reporting.

Business Challenge

Small teams tracked expenses in chat messages and notebooks — no budgets, no approval flow, and month-end reconciliation took days.

Why It Was Built

Built to manage expenses and invoicing together: record spends, generate invoices as PDF/email, and report against budgets.

Target Users

Small businesses and teams that need simple expense tracking tied to invoicing and budget reports.

Architecture

CodeIgniter MVC; DomPDF for invoice/receipt PDFs; PHPMailer for delivery; budget-vs-actual reports computed per period; company/party master data reused across invoices.

Deployment

Shared PHP hosting with MySQL; simple backup via scheduled dumps.

Scalability

Lightweight CI stack; reporting queries aggregated for period summaries.

Challenges

• Manual expense tracking
• Time-consuming invoice creation
• Limited budget management
• Poor reporting

Solutions

• Automated expense tracking
• PDF invoice generation
• Budget management
• Comprehensive reporting

Summary

Expense tracking and invoicing with budgets and financial reporting.

Technologies Used

CodeIgniter PHP MySQL DomPDF PHPMailer

Third-Party Integrations

• DomPDF receipts & invoices
• PHPMailer
• Budget tracking
• Party/company management
• Financial reporting

Screenshots

Results & Metrics

Reduced manual effort

Improved cost control

Tax compliance

Business insights

Expenses and invoices in one system — reconciliation is finally painless.

E

Expensify Team

Product

Project Timeline

Phase 1: Core platform foundation

Phase 2: Expense management

Phase 3: Invoice generation

Phase 4: Company management

Phase 5: Budget management

Phase 6: Source management

Phase 7: Financial reporting

Phase 8: Advanced features

Measurable Outcomes

Expense capture and invoicing unified — month-end reconciliation is now a report click away.

Designed & developed by Ankush Gautam

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