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ERP Development Services: Custom ERP Software Development Company

Updated September 2026 · Written and maintained by the Progression Agency strategy team

Progression Agency provides ERP development services: custom ERP modules, extensions to Odoo, NetSuite and other platforms, and integrations that connect finance, inventory, operations and sales systems into one reliable source of truth.

On this page · 13 sections
  1. What is ERP development?
  2. ERP development services we provide
  3. Key features and components
  4. Common integrations
  5. Financial controls
  6. Our ERP development process
  7. How much does ERP development cost?
  8. Technology we typically use
  9. Mistakes to avoid
  10. Why choose Progression Agency for ERP development?
  11. Related services
  12. Custom ERP vs off-the-shelf ERP
  13. Video: building software

The short answerERP development is building or extending enterprise resource planning software — finance, inventory, purchasing, production and reporting — so core operations run on one data model. Most businesses extend an ERP platform rather than build one from scratch; custom ERP modules and integrations commonly cost $40,000-$250,000.

Cost ranges are US planning figures, not quotes.

ERP development searches
Businesses search for ERP developers when spreadsheets and disconnected tools stop scaling.

What is ERP development?

ERP development is designing, building, customizing or integrating enterprise resource planning software that runs an organization’s core operations on shared data.

For small and mid-sized businesses we usually recommend extending a proven platform such as Odoo, NetSuite or Microsoft Dynamics, with custom modules only where the business is genuinely different.

Fin — Finance. Ledger and reporting..
Inv — Inventory. Stock and warehouses..
Buy — Purchasing. Suppliers and POs..
Make — Production. BOMs and work orders..
Sell — Order management. Quotes to invoices..
Data — ERP reporting. One source of truth..

ERP development services we provide

Projects we are most often asked to build.

Custom ERP modules

Industry-specific functionality where standard modules fall short.

Odoo development

Custom apps, workflows and integrations on Odoo.

NetSuite and Dynamics extensions

Scripts, integrations and custom records.

ERP integrations

Connect ecommerce, CRM, WMS, payroll and banking.

Data migration

Move and clean data from legacy systems.

ERP reporting

Dashboards on governed ERP data; see dashboard development.

ERP development is designing, building, customizing or integrating enterprise resource planning software that runs an organization’s core operations on shared data.

Key features and components

What separates a useful build from a costly one.

ERP development: key components
FeatureWhy it matters
Shared data modelOne version of the truth
Role-based accessSegregation of duties
Audit trailFinancial controls
Workflow approvalsPurchasing and spending
Multi-entity supportGrowing organizations
IntegrationsNo re-keying
ReportingReal-time operations
Migration toolsClean go-live

Common integrations

Where the value usually comes from.

Common integrations
SystemWhat we connect
EcommerceOrders and inventory
CRMCustomers and quotes
WMSFulfillment
BankingPayments and reconciliation
PayrollLabor costs
BIReporting

Financial controls

ERP systems underpin financial reporting.

  • Segregation of duties and approval workflows.
  • Audit trails for financial transactions.
  • Access reviews and least privilege.
  • Controls that support your auditors’ requirements.
How we deliver ERP development
Running old and new systems in parallel for a period protects the books during cutover.

Our ERP development process

We map processes and data, recommend a platform to extend or a custom approach, design the data model, build modules and integrations in sprints, migrate data, run in parallel to verify numbers, and go live with training.

How much does ERP development cost?

As a planning range, ERP integrations commonly cost $40,000-$100,000, custom modules on an existing ERP $50,000-$150,000, and a custom ERP for a specialized business $200,000+.

ERP development cost ranges (planning figures)
ScopeTypical rangeTimeline
ERP integration$40,000-$100,0002-4 months
Custom modules on existing ERP$50,000-$150,0003-6 months
Custom ERP for specialized operations$200,000+6-12 months

Technology we typically use

Mainstream, maintainable choices.

Technology we typically use
LayerChoice
PlatformsOdoo, NetSuite, Dynamics
Custom modulesPython (Odoo), JavaScript (SuiteScript)
IntegrationREST APIs, iPaaS
DataPostgreSQL
ReportingBI tools
HostingCloud

Mistakes to avoid

Common causes of overruns and low adoption.

  • Building a custom ERP when a platform fits.
  • Migrating dirty data.
  • No parallel run.
  • Customizing everything.
  • Ignoring integrations until late.
  • Skipping user training.
Extend first — ERP. Lower risk..
Clean data — ERP. Accurate books..
Parallel run — ERP. Verified numbers..
Integrations — ERP. No re-keying..
Controls — ERP. Audit-ready..
Training — ERP. Adoption..

Why choose Progression Agency for ERP development?

Engineering, design and go-to-market in one team.

  • Honest platform recommendations.
  • Integration and migration experience.
  • Reporting on top of ERP data.
  • You own the code, data and accounts.
  • Headquartered in New York City, working nationwide.

See CRM development, manufacturing software and enterprise app development.

Custom ERP vs off-the-shelf ERP

Packaged ERP suites cover standard accounting, inventory and purchasing well. Custom ERP, or custom modules around a packaged core, is the better fit when your operations do not match the package’s assumptions.

Custom vs packaged ERP
FactorPackaged ERPCustom ERP or custom modules
Fit to unusual workflowsWorkarounds and customizationBuilt around your process
LicensingPer user, rising with headcountNo per-seat license
Time to first valueFast for standard processesPhased, module by module
UpgradesVendor-controlledUnder your control

The hybrid approach

Many clients keep packaged accounting and build custom operations modules connected by APIs, which is often the lowest-risk route.

Ready to scope it?

Tell us the users, workflow and systems involved. We will propose a first release and planning estimate.

Get a proposal

Video: building software

Explainers on the practices and frameworks we use.

Getting found in search

AI, AEO and what is changing

Paid media and lead generation

Websites and design

Choosing and working with an agency

Software and app development

Social, content and brand

By industry and by situation

Frequently asked questions

What is ERP development?
Designing, building, customizing or integrating ERP software that runs core operations.
How much does ERP development cost?
As a planning range, $40,000-$150,000 for integrations and custom modules.
How long does ERP development take?
Commonly 2-6 months for modules and integrations.
Should we build a custom ERP?
Usually extend a proven platform; build custom only for specialized operations.
Do you do Odoo development?
Yes.
Do you customize NetSuite?
Yes, with SuiteScript and integrations.
Can you integrate our ERP with Shopify?
Yes.
Can you migrate from QuickBooks to an ERP?
Yes, with data cleaning.
What is a parallel run?
Running old and new systems together to verify results.
What modules does an ERP include?
Finance, inventory, purchasing, production, sales and reporting.
Can you build ERP dashboards?
Yes.
What tech stack do you use?
Platform SDKs, Python or JavaScript, REST APIs and PostgreSQL.
How much maintenance is required?
Platform upgrades, integrations and improvements.
What should I look for in an ERP developer?
Platform expertise, migration experience and controls awareness.
Can ERP work for small businesses?
Yes, with right-sized platforms.
Can you connect ERP to our CRM?
Yes.
Can AI help with ERP?
Yes: document extraction and forecasting.
How do you avoid ERP failure?
Clear scope, clean data, parallel runs and training.
Who owns the customizations?
You do.
Where is Progression Agency located?
New York City, serving clients nationwide.

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