ERP integration for a mid-size manufacturer or distributor typically costs between $5,000 and $50,000, and where a project lands in that range is predictable once you know what drives it. That's the short answer. The longer answer (what actually moves a project from the bottom of the range to the top, and how to keep yours near the bottom) is what this article covers, with the numbers we use in our own proposals.
The Honest Price Ranges
| Project type | Typical range | Timeline |
|---|---|---|
| Simple: two systems, standard APIs, one-way data flow (e.g. orders from ecommerce into the ERP) | $5,000-$15,000 | 2-4 weeks |
| Moderate: two-way sync, field mapping with real translation, duplicate handling (e.g. ERP-CRM like P21 to Salesforce) | $15,000-$35,000 | 4-8 weeks |
| Complex: three or more systems, custom business logic, a legacy system without an API, or AI extraction in the flow | $35,000-$50,000+ | 2-4 months |
These are implementation prices for scoped, working integrations, not discovery retainers, and not the seven-figure numbers that come from big-firm ERP practices, which are priced for a different market. If a quote for connecting two mid-market systems starts with a 1 and six digits, you're being sold a methodology, not an integration.
What Drives the Cost Up
- The number of systems. Cost scales with connections, not systems. Two systems is one connection; four systems can be six connections if everything must talk to everything. A hub design (everything syncs through the ERP) keeps this linear, and is usually the right call anyway.
- Data model mismatch. When one system's "customer" is another system's "account plus contacts plus ship-tos," someone has to design the translation, handle the edge cases, and decide what wins on conflict. This mapping work, not the API code, is where moderate projects spend their hours.
- Legacy systems without APIs. A desktop ERP with only a COM SDK or database access needs a bridge service built first, roughly $15,000-$40,000 of additional scope. We covered how that works in When Your ERP Has No API.
- Dirty data. Duplicate customers and inconsistent part numbers don't just risk the go-live; they add cleanup scope. A matching exercise that should take days takes weeks when 30% of records need human review. If you know your data is rough, budget cleanup explicitly rather than discovering it as change orders.
- Custom business logic. "Sync the orders" is cheap. "Sync the orders, but route drop-ships differently, apply the national-account pricing rules, and hold anything over credit limit" is where scope grows. Every rule is real work; the question is whether it earns its cost.
What Brings the Cost Down
- Modern APIs on both ends. NetSuite, Dynamics, Salesforce, Shopify, and current P21 versions all have workable APIs. When both sides do, the plumbing is fast and the budget goes to mapping and validation, where it belongs.
- One-way flows where one-way is enough. Most "we need two-way sync" requirements dissolve under questioning. Orders flow in, statuses flow out; each dataset having one owner system halves the complexity. Push back on bidirectional everything. It's the most expensive default in integration.
- Clear requirements over discovery billing. A one-page list of "these fields, from here to there, this often, and here's what happens on conflict" saves thousands in discovery hours. You know your business; write it down before the vendor meeting.
- Phasing. Ship the highest-value flow first, run it, then add the next. Phases keep each engagement small, prove value before the next check, and surface real-world lessons that make later phases cheaper.
Ongoing Costs Nobody Mentions Until Later
An integration is software that runs every day, and it has running costs: hosting for the middleware ($50-$300/month typically), and maintenance when an API version changes, an ERP gets upgraded, or a new field needs mapping. Budget $200-$800/month for a support arrangement, or plan for occasional hourly work if you'd rather pay per incident. A vendor who quotes zero ongoing cost is either hiding it or planning to disappear. We've written about how to tell the difference.
Whether the Math Works
The comparison that matters isn't integration versus free; it's integration versus what you're paying now, in labor and errors, to be the integration yourself. We walked through that calculation in The Real Cost of Disconnected Systems: for most mid-size operations a single bad seam costs $30,000-$100,000 a year. Against that, a $20,000 integration that removes the seam pays back in months, not years. Our P21-Salesforce project paid back in about four; that's typical of the moderate tier, not exceptional.
The honest way to budget: calculate the seam cost first, then get two or three scoped proposals and normalize them with the five questions from the partner-selection article. If the seam costs more per year than the worst quote, the decision was made before the shopping started.
Uptimize Solutions publishes its integration pricing approach and delivers in scoped phases across P21, Sage, NetSuite, Dynamics, SAP, and the systems around them. See our integration services or book a free workflow audit and we'll estimate your seam cost and your integration cost in the same meeting.