ERP Software Development Company in USA

About Our Firm

Excel Complete offers USA-based ERP software development services tailored to your business needs, helping improve reporting, accounting processes, operational workflows, and enterprise systems. Based in Ann Arbor, we support clients across the U.S. with on-site engagements to audit systems and develop implementation strategies.

Our background spans accounting, financial analysis, and software development, allowing us to build systems that support both daily operations and higher-level business planning. In addition to ERP development, we help clients improve reporting workflows, streamline accounting processes, integrate systems, automate manual tasks, and centralize data across departments.

Schedule a call to discuss your ERP software development needs and potential next steps. Most calls are led by Allen Frantsen, a licensed Michigan CPA and software developer with experience building applications for Fortune 5 organizations, as well as in financial systems, statistical analysis, reporting automation, analytics, and operational process improvement.

Our Process

Our ERP development process starts with understanding how your business operates today. From there, we design and build systems that support reliable operations, accurate financials, and consistent reporting.

Step 1: Understand the business and current systems

We start by stepping back to understand how your business actually operates. This includes reviewing current systems, mapping workflows, identifying operational and financial constraints, and documenting how data flows across teams and tools today.

For clients where we’ve already led a fractional CFO engagement, this foundation is mainly in place. In those cases, ERP development becomes a direct extension of the financial and operational model we’ve already built, translating budgets, forecasts, controls, and reporting requirements into scalable systems rather than starting from scratch.

Step 2: Design the system and approach

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, integrate, 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, trusted, and scaled as the business evolves.

ERP Software Development Cost

The cost of ERP development depends on scope, complexity, and the extent of custom development. Targeted custom modules that extend an existing ERP or replace specific spreadsheet-driven processes typically range from $10,000 to $20,000, depending on data complexity, integrations, and reporting requirements.

Full-custom ERP builds vary widely. Most projects fall between $30,000 and $75,000, with larger or more complex systems exceeding that range. Costs are driven by factors such as workflow complexity, financial logic (for example, job costing or project accounting), data migration, integrations, and reporting needs. Our goal is to scope the work appropriately and recommend the most efficient approach rather than defaulting to a complete rebuild.

Operations

We design ERP systems around how work actually happens, not how off-the-shelf software expects it to. This can include custom workflows for quote-to-order processes, inventory, job tracking, commissions, accounts receivable, and operational reporting, all connected through a clean, user-friendly interface.

For many businesses, operational bottlenecks occur between sales, operations, and accounting systems. Quotes may live in a CRM, orders in spreadsheets, inventory in a separate system, and billing inside accounting software. We help connect these workflows so information flows cleanly across the organization, and teams spend less time managing duplicate data and manual processes.

Depending on the business, ERP systems may also include forecasting, production tracking, WIP reporting, supplier integrations, or operational dashboards that improve visibility into performance and help management identify issues earlier. 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

As part of our ERP software development services, we design financial systems that ensure numbers are accurate, complete, and consistent across operations. This includes structuring accounting logic to support job costing, project accounting, accruals, and clean transaction flows, while reducing rework and shortening the month-end close. The focus is on building a financial foundation that teams can trust before any reporting or analysis takes place.

Where appropriate, we connect to existing platforms such as NetSuite or SAP using APIs or ODBC to improve data flow, automate reconciliations, and strengthen controls without requiring a complete rebuild. When existing systems can no longer support the business, we design and implement financial architectures that scale cleanly and provide a reliable source of financial truth.

Reporting

A key benefit of ERP development is clarifying what should be measured and what data is currently missing. Well-defined data structures are critical for capturing the correct information to produce meaningful metrics, and this is an area where our software engineers excel. We work with teams to define operational and financial KPIs, identify gaps in existing reporting, and design clean, purpose-built schemas that ensure data is collected consistently and accurately at the source.

From there, we implement automated reporting, alerts, and dashboards that provide real-time or near-real-time visibility into performance. Reports can be interactive, allowing teams to add notes, flag anomalies, track follow-ups, and annotate results directly within the system. This supports faster close cycles, clearer decisions, and investor-ready reporting, without layering on unnecessary tools or complexity.

Construction is one industry we frequently work with, where reporting requirements are often highly customized based on business needs. WIP reporting, job costing, change order tracking, and project-level forecasting are commonly custom-built ERP modules that can save construction teams substantial time while improving visibility into project performance. Better reporting here helps contractors identify bottlenecks earlier, improve forecasting accuracy, and make more informed financial and operational decisions.

Integrations

ERP software development services often address a common problem across many businesses: systems that operate independently and produce conflicting data. We design integrations between ERP, CRM, and accounting systems so customer records, inventory, orders, and financial data remain consistent across the organization, eliminating duplicate lists and downstream discrepancies.

When customer, operational, and financial systems stay in sync, billing aligns with actual activity, accounts receivable and payable become easier to manage, and operational changes flow cleanly through the business. Whether extending existing platforms or integrating systems as part of a broader ERP build, our focus is on reliable data flow that supports accurate financials and day-to-day operations.

System Maintainability

Many off-the-shelf ERP platforms become overly complex over time, with hundreds of tables (some thousands), disconnected workflows, excessive customization, and reporting structures that are difficult to maintain. While large enterprise systems can be powerful, they often introduce operational overhead that slows reporting, increases support costs, and makes future changes difficult to implement.

Our approach focuses on building ERP systems with clean architecture, simplified workflows, and maintainable data structures. In many cases, the systems we build operate with fewer than 50 core database tables, making them easier to understand, maintain, scale, and extend as business requirements evolve.

Simpler systems can still support thousands of users across regions, multiple departments, and complex operational workflows without introducing unnecessary maintenance burdens. Well-designed ERP architecture is often easier to scale, support, maintain, and extend over time for both growing businesses and larger enterprise organizations.

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.

What tools and technologies do you use?

We typically build ERP systems using a modern, reliable stack that may include AWS, React, and SQL-based databases. The specific tools matter less than the system design. Our primary focus is pattern recognition, simplification, and building applications that are easy to use, easy to maintain, and effective at removing operational bottlenecks.

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.