ERP Software Development Company in USA

Updated: 7/7/2026

Our Firm

Excel Complete develops custom ERP software focused on accounting, business operations, and reporting. We serve clients across the United States with both remote and on-site consulting. Our experience allows us to solve complex ERP challenges in areas including:

• Accounting and financial reporting
• Pricing optimization
• Labor modeling and workforce planning
• Supply chain and logistics optimization
• Business process improvement
• Statistics and market research

We offer a broad range of technical expertise to ensure your ERP system is built using the stack that is best for you:

• Databases: PostgreSQL, SQL Server, and MySQL
• Frontend: React and React Native
• Backend: C++, Node.js, Python, and PHP
• Cloud: AWS and Microsoft Azure
• Integration: REST APIs, ODBC, OAuth
• Enterprise Systems: SAP, NetSuite, Microsoft Dynamics

ERP consultations are led by Allen Frantsen, a Michigan CPA and software developer with experience building solutions for Fortune 500, nonprofit, and government organizations.

Custom ERP Benefits

A custom ERP is more than software. The development process helps identify inefficient workflows, undocumented business rules, and opportunities to improve how your business operates.

• Identify process bottlenecks and inefficiencies
• Eliminate duplicate work and spreadsheet dependencies
• Standardize business rules and workflows
• Reduce manual data entry and repetitive tasks
• Improve reporting and decision-making
• Support future growth with scalable processes

Every custom ERP project we've completed has uncovered process gaps and manual workarounds that limited efficiency. These operational improvements deliver more value than the software itself, as they bring clarity to processes and cleaner data, leading to better decision-making.

ERP Development Cost

ERP development projects typically start at $20,000. Common projects include accounts payable systems, budgeting applications, inventory tracking systems, and spreadsheet replacements. Larger ERP initiatives are quoted based on scope, complexity, and business requirements.

Most department-level applications are delivered within one month. Larger ERP systems involving multiple departments, custom workflows, integrations, and complex data architecture are typically delivered within 6-12 months.

Excel Complete also offers ERP assessment & evaluation services for organizations evaluating ERP software, considering custom development, or already underway with an ERP project. Assessments help identify the best path forward based on your situation.

The Development Process

We start by understanding your business as a whole. From there, we design and build systems that improve operations and reporting.

Step 1: Understand the Business

We start by mapping your workflows, identifying operational constraints, and documenting how data moves across your organization. For clients who already utilize our Fractional CFO services, this foundation is already built. In those cases, we can fast-track development by directly translating your established financial models, budgets, and controls into your new software.

Step 2: Design the System

Using that understanding, we design an ERP approach that fits your organization. This includes defining system architecture, data models, reporting requirements, and integration points. Depending on the situation, this may involve extending an existing ERP with custom modules or designing a fully custom system built around your workflows and financial structure.

Step 3: Build and Support

We develop and integrate the system, migrate and validate data, and support rollout and adoption. Our focus is on reliability, clean reporting, and operational efficiency, ensuring the system can be maintained and scaled as the business evolves. We also offer outsourced accounting services for organizations requiring ongoing accounting and reporting support.

ERP Database Development

Database design is the foundation of an ERP system. A well-designed database supports accounting, operations, inventory management, workforce planning, reporting, and real-time monitoring. Well-organized data structures make the underlying systems easier to build and maintain.

This is how we approach ERP database development:

• Identify current data sources, business processes, and reporting requirements
• Design simple data structures and relationships
• Build pipelines between systems
• Implement transactional databases for applications
• Create data warehouses for company-wide analytics
• Optimize database performance

Transactional Databases vs. Data Warehouses

Modern ERP systems often utilize both transactional databases and data warehouses. Each of these databases serves a different purpose.

Transactional Databases

Transactional databases such as PostgreSQL, SQL Server, and MySQL form the foundation of modern ERP applications. These systems are designed to handle high volumes of inserts, updates, and queries for the applications that users and customers interact with.

For our development services, PostgreSQL is our preferred platform due to its scalability. Combined with high-performance application architectures, PostgreSQL can support ERP systems that process large transaction volumes efficiently and reliably.

Transactional databases are used for these types of ERP functions:

• Orders and invoices
• Inventory movements
• Employee scheduling
• Labor modeling
• Customer records
• Financial transactions

Data Warehouses

Data warehouses such as Snowflake or Google BigQuery are designed for analytics and reporting. They consolidate data from multiple systems and provide a centralized source for business intelligence.

Examples include:

• Historical point-of-sale data
• Financial reporting
• Workforce analytics
• Forecasting models
• Executive dashboards
• Cross-functional reporting

For example, a workforce management team may maintain a labor modeling application powered by a transactional database. The application contains labor standards, volume drivers, and business assumptions used to manage the workforce. Key metrics, such as yearly budgeted hours per store, are then published to a data warehouse, allowing executives and business leaders to access reports and dashboards without bothering the team or requiring them to query and understand the actual labor modeling application.

By separating transactional workloads from analytical workloads, organizations can improve system performance, simplify development, and create a robust ERP system.

Operations

Your ERP should support how your business operates, not force your team to adapt to generic software. Custom-built ERP systems connect departments, eliminate manual work, and improve visibility across your organization.

• Quote-to-order
• Inventory management
• Production planning
• Job and project tracking
• Accounts receivable
• Commission management
• Operational reporting
• Demand forecasting
• Supplier management

For manufacturing environments specifically, our manufacturing software development services often expand on ERP workflows with tools for production tracking, inventory visibility, shop-floor operations, and supplier management.

Financial Controls

A custom ERP provides strong internal controls while supporting your unique business rules. We design financial systems that improve accounting workflows, including:

• General ledger integration
• Job costing and project accounting
• Accrual accounting
• Accounts payable and receivable
• Bank reconciliations
• Financial reporting
• Internal controls
• Audit trails
• API and ODBC integrations with existing ERP systems
• Month-end close automation

Not every business needs a complete ERP replacement. We can develop individual accounting modules that integrate with platforms such as SAP, NetSuite, Microsoft Dynamics, and other systems.

Reporting

One of the biggest benefits of a custom ERP is that during the discovery phase, we help define what should be measured. During development, we identify missing data, create key business metrics, and design data structures that capture the information needed for accurate reporting and better decision-making.

Based on those requirements, we commonly develop the following reporting modules as part of custom ERP implementations:

• Monthly financial statements
• Comparative financial statements
• Executive dashboards
• Operational KPIs
• Job costing reports
• WIP reporting
• Project profitability
• Forecasting and budgeting
• Inventory reporting
• Change order tracking
• Interactive dashboards with drill-down reporting

For construction companies specifically, we frequently develop custom reporting tools for WIP reporting, job costing, change order tracking, project forecasting, and project profitability, helping contractors improve visibility into project performance and shorten reporting cycles.

Integrations

Some businesses don't need a complete ERP replacement. Instead, the biggest opportunity is connecting existing systems and filling workflow gaps with custom applications. We develop integrations that eliminate duplicate data and allow existing software to work together as a single system.

• ERP integrations
• CRM integrations
• Accounting system integrations
• REST API development
• ODBC and database connections
• Data synchronization
• Automated data imports and exports
• Custom workflow applications
• Legacy system modernization
• Third-party software integration

System Maintainability

Many ERP systems become overly complex over time. Hundreds of database tables (some thousands), excessive customization, and disconnected workflows increase maintenance costs, slow reporting, and make future enhancements unnecessarily difficult.

Our design philosophy emphasizes simplicity over complexity. Every database table, workflow, and line of code becomes a long-term maintenance responsibility, so we build systems that remain easy to understand, support, and extend as your business grows.

• Clean database architecture
• Minimal database tables
• Minimal custom code
• Modular application design
• Well-documented systems
• Standardized business rules
• API-first integrations
• Easier upgrades and enhancements
• Lower long-term maintenance costs

Many of the ERP systems we build operate with fewer than 50 core database tables while supporting complex business processes. Well-designed architecture scales across departments, locations, and growing organizations without introducing unnecessary complexity.

Frequently Asked Questions

The answers below address common questions about ERP software development services, including scope, tools, timelines, and fit for small and mid-sized businesses.

Do you work with small businesses?

Yes. For small businesses, ERP work often takes the form of a focused custom web application that connects to an existing accounting or ERP platform such as NetSuite. This approach keeps costs low, avoids unnecessary complexity, and replaces spreadsheet-driven workflows without requiring a complete system rebuild.

How long does ERP development take?

Timelines depend on scope. Simple custom modules or extensions can often be delivered in about one month. Larger ERP implementations or multi-module systems typically take 3 to 6 months or longer, depending on complexity, integrations, data migration, and testing requirements.

How do we find a Partner to modernize our core system for finance?

You need a firm with expertise in accounting, software development, and process mapping. Excel Complete combines CPA-led expertise with custom software development to build finance and accounting ERP systems. We understand month-end close, revenue recognition, WIP reporting, budgeting, and financial reporting, and integrate QuickBooks, NetSuite, and payroll systems into a single platform.

How do you handle corporate ERP development?

We ensure ERP development supports enterprise resource planning across departments, giving executives at the corporate office a centralized view of operations, reporting, and key business metrics through a unified command center. A good professional ERP development service involves mapping processes, understanding data sources, and designing the proper architecture before development begins.