How do approval workflows work?

Approval rules are configured by amount threshold and expense category. Requests are routed to the correct approver(s) automatically, with reminders and escalation if no action is taken.

Can the system enforce expense policies?

Yes. Policy rules (allowed categories, per-meal limits, travel class restrictions) are configured by HR. Expenses that violate policy are flagged automatically with a reason.

Can expense data flow into our accounting system?

Yes. The generated app can export journal entries as CSV or via API webhook. Describe your accounting system in the prompt and ProjectCode will scaffold the integration.

Business Operations

Build a Expense Management System with AI - in Hours

ProjectCode generates a complete, production-ready Expense Management System from a single natural language prompt. In hours instead of months, you get a React frontend, NestJS REST API, PostgreSQL database, and authentication - fully integrated, live-previewed, and deployed to a URL you own.

Estimated build time: 2–4 hours

Build my Expense Management now View pricing

Free to start · No credit card required

The Challenge

Why building a Expense Management from scratch is hard

Building a Expense Management System from scratch requires months of development time and significant engineering resources. Teams struggle to coordinate frontend, backend, database, and authentication while managing expense management-specific business logic, integrations, and role-based access rules.

What's Included

Everything your Expense Management needs

ProjectCode generates a production-ready Expense Management with all the modules your team needs from day one.

Mobile receipt capture with OCR text extraction

Policy-based auto-approval and rejection rules

Multi-level approval workflows with delegation

Per diem and mileage tracking with rate configuration

Corporate card transaction import and reconciliation

Expense report generation with PDF export

Budget vs actual reporting by department and category

ERP integration for automatic journal entry creation

Architecture

How it's built

The generated Expense Management follows production-grade architecture patterns.

React 18 + TypeScript frontend with role-based dashboards tailored for expense management workflows

NestJS REST API with dedicated expense management modules, DTOs, validators, and service layer

PostgreSQL relational schema with normalized tables for all expense management entities

JWT + Google OAuth authentication with granular permission gates per role

Real-time Socket.IO events for live expense management status updates and notifications

Managed hosting with one-click deploy, custom domain, and auto-SSL

Database

PostgreSQL schema designed for Expense Management

ProjectCode generates a normalized, indexed PostgreSQL schema with the right tables and relationships for your use case. You own the schema and can evolve it freely.

expense_reports (id, employee_id, period, status, total, submitted_at, approved_by, notes)
expenses (id, report_id, date, amount, currency, category, merchant, receipt_url, policy_status, description)
approval_workflows (id, workspace_id, rules jsonb, approver_levels jsonb, budget_thresholds jsonb)
budgets (id, department_id, category, period, allocated, spent, committed)

schema.sql (preview)

-- Generated by ProjectCode
-- Expense Management System schema

CREATE TABLE expense_reports__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE expenses__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE approval_workflows__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

CREATE TABLE budgets__id (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  created_at TIMESTAMPTZ DEFAULT NOW(),
  updated_at TIMESTAMPTZ DEFAULT NOW()
  -- ... auto-generated columns
);

Tech Stack

Production-ready from day one

Every generated app uses a battle-tested stack you can deploy anywhere and own completely.

Frontend

React 18 + TypeScript + Tailwind CSS

Backend

NestJS 10 + Node.js + TypeScript

Database

PostgreSQL (managed or Supabase)

Auth

Email OTP · Google OAuth · GitHub OAuth

Deployment

Managed hosting · Custom domain · Auto-SSL

AI Models

Claude Sonnet · Claude Opus · Kimi

Try It Now

Example prompt to get started

Copy this prompt into ProjectCode and get a working app in minutes.

ProjectCode prompt

Build an expense management system for a company with 300 employees and 10 cost centers. Include mobile receipt upload with OCR, configurable approval workflows (under $200 auto-approve, $200–$1000 manager, above manager + finance), per diem tracking, corporate card transaction import, expense report PDF generation, and a finance dashboard with spend by category, department, and month versus budget.

Build this now - it's free

Deployment

Deploy your Expense Management anywhere

Managed hosting

One-click deploy to a live URL managed by ProjectCode.

Custom domain

Connect your own domain with auto-provisioned SSL via Cloudflare.

GitHub export

Push to your GitHub repo and self-host or deploy via Vercel, Railway, or AWS.

Docker ready

Export a Dockerfile and docker-compose for any containerized environment.

Pricing

Start free, scale as you grow

No per-seat fees. No vendor lock-in. Token-based pricing that scales with your usage.

Free

Start building your first app. Live preview, managed hosting, and full code export included.

Token Packs

From $5

Purchase token packs that roll over every month. Build more, pay only for what you use.

Enterprise

Custom

Custom models, SLA, SSO, and private cloud deployment for large teams.

See full pricing details

FAQ

Common questions about building a Expense Management

Yes. The OCR module reads merchant name, date, and amount from uploaded receipts. Employees review and confirm before submitting. This is powered by Google Vision or AWS Textract (configurable in your prompt).

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Build your Expense Management in hours, not months

Start free. No credit card. Your first app is live in minutes.

Get started free