Key Takeaways
- For a 15-person team, readymade ERP costs $180,000–$320,000 over 3 years when all costs are counted honestly.
- A custom ERP for the same team costs $28,000–$45,000 to build once, plus $3,000–$6,000/year in maintenance.
- Most businesses of 10+ users recover the custom build cost in 18–26 months through subscription savings alone.
- Readymade ERP wins only in 4 specific situations - detailed below with honest criteria.
- Every workaround spreadsheet your team maintains alongside your current ERP is evidence it does not fit your business.
What this comparison covers: "Readymade ERP" refers to any off-the-shelf, subscription-based enterprise resource planning platform - whether cloud-hosted or on-premise - where you pay a recurring licence fee to use software that another company built and owns. "Custom ERP" means software built specifically for your business, owned by you, with no ongoing licence fees.
The complete head-to-head comparison
This table covers every meaningful dimension - cost, flexibility, ownership, speed, and long-term fit. Not just the features vendors advertise.
| What you're comparing | Readymade ERP | Custom ERP |
|---|---|---|
| Upfront cost | $15,000–$80,000 (implementation + setup fees) | $18,000–$60,000 one-time build. You own it permanently. |
| Ongoing cost | $80–$300/user/month, every year, forever. Increases ~10% annually. | $2,000–$5,000/year maintenance only. No per-user fees. Ever. |
| 3-year total (15 users) | $180,000–$320,000 when licence + admin + add-ons + implementation are counted | $32,000–$55,000 build + 3 years of maintenance |
| Workflow fit | You adapt your business to match the ERP's built-in assumptions | The ERP is built to match exactly how your business operates |
| Modules you don't use | You pay for all modules regardless of which ones your team actually uses | Only what you need is built. Nothing extra. Nothing missing. |
| Adding users | Cost increases permanently with every new hire for the life of the subscription | No cost per user. Add 50 people - your licence cost stays at zero. |
| Customisation | Limited and expensive. Requires certified consultants at $100–$250/hr. | Unlimited. Your development team makes changes without platform restrictions. |
| Data ownership | Vendor controls your data. Migration is complex if you ever want to leave. | You own all data in your own database. Fully portable. No vendor lock-in. |
| Integration with tools | Available but costly. Most integrations require paid add-on modules. | Built to your exact stack. Native integration with the tools your team already uses. |
| AI & automation | Available as paid add-ons. AI features are generic, not business-specific. | Unlimited. AI can be embedded at any workflow level using your actual data and logic. |
| Time to go live | 4–12 weeks for standard implementation | 10–18 weeks. Core modules usable from week 10. |
| Price control next year | Vendor sets the price. Average 9–12% annual increase across major platforms. | You control your costs. No vendor can raise your fees. |
| Support after handover | Included in subscription but often slow and generic | Direct team access. Changes made by the developers who built your system. |
3-year cost breakdown by team size
These figures use real-world readymade ERP pricing (mid-tier plans, honest add-on costs, and annual increases) against actual custom build costs from projects we have delivered. They are not promotional - they are accurate.
How readymade ERP costs are calculated here: Base licence × users × 12 months × 3 years (with 10% annual increase) + average implementation ($25,000 for 15 users) + one add-on module ($25/user/month) + part-time admin support ($18,000/year for teams over 8). This is conservative. Many businesses pay more.
Small team: 5–10 users
| Year | Readymade ERP (est.) | Custom ERP (est.) | Custom saving |
|---|---|---|---|
| Year 1 | $42,000–$68,000 (impl. + licence + admin) |
$20,000–$30,000 (build + yr 1 maintenance) |
$12,000–$38,000 |
| Year 2 | $22,000–$38,000 (annual licence + admin) |
$2,000–$4,000 (maintenance only) |
$20,000–$34,000 |
| Year 3 | $24,000–$42,000 (+10% annual increase) |
$2,000–$4,000 (maintenance only) |
$22,000–$38,000 |
| 3-Year Total | $88,000–$148,000 | $24,000–$38,000 | $54,000–$110,000 |
Mid-size team: 15–25 users
| Year | Readymade ERP (est.) | Custom ERP (est.) | Custom saving |
|---|---|---|---|
| Year 1 | $85,000–$140,000 (impl. + licence + admin + add-ons) |
$32,000–$50,000 (build + yr 1 maintenance) |
$53,000–$90,000 |
| Year 2 | $48,000–$82,000 (annual licence + admin + add-ons) |
$3,000–$6,000 (maintenance only) |
$45,000–$76,000 |
| Year 3 | $53,000–$90,000 (+10% annual increase) |
$3,000–$6,000 (maintenance only) |
$50,000–$84,000 |
| 3-Year Total | $186,000–$312,000 | $38,000–$62,000 | $148,000–$250,000 |
* All figures in USD. Readymade ERP costs based on mid-tier enterprise plans including honest add-on costs, admin support, and typical 10% annual price increases. Custom ERP costs based on Coreway projects delivered 2023–2026.
"We spent four years adapting our processes to fit the ERP. When we finally built our own, we realised how much time and money we had been losing to that friction every single week."
When each option genuinely wins
This is the part most comparisons get wrong - they present one side as always better. The honest answer is more useful: each option has specific situations where it is the right call.
- Your team maintains parallel spreadsheets alongside the ERP
- You have 10+ users and expect to grow further
- Your workflows differ meaningfully from standard templates
- You are paying for modules your team never opens
- You want AI or automation built into specific processes
- You have recurring data re-entry between tools
- Your vendor has raised prices two or more times already
- You need to be fully live in under 8 weeks
- Your team has fewer than 8 users and no growth plans
- Your business processes closely match standard workflows
- You have a dedicated ERP admin on staff already
- You need extensive third-party integrations from day one
- Regulatory compliance features are pre-built
Interactive ROI Calculator
What a custom ERP includes at each price point
A custom ERP does not mean reinventing everything from scratch. It means building the modules your business actually needs - no more, no less - with your specific workflows, nomenclature, and logic built in from the start.
| Build tier | Typical modules included | Best suited for |
|---|---|---|
| $18,000–$28,000 | Inventory management · Purchase orders · Sales orders · Basic accounting & P&L · Supplier & customer records · Role-based user permissions · Dashboard & reports · Data migration from existing system | Trading, distribution, or service businesses with 8–18 users needing clean operational control |
| $28,000–$45,000 | Everything above + Multi-location inventory · Automated procurement triggers · HR & leave management · Payroll integration · Project / job tracking · Custom approval workflows · API connections to 2–3 external tools · Mobile-accessible interface | Manufacturing, construction, or multi-department businesses with 15–35 users |
| $45,000–$70,000 | Everything above + Customer / vendor portal · Production planning & scheduling · Advanced forecasting & analytics · Multi-currency & multi-region · Barcode / QR scanning · AI-powered demand forecasting · Integrations with 5+ external platforms · Full audit trail & compliance reporting | Mid-market businesses with complex supply chains, 30–80 users, or specific industry compliance needs |
After delivery, you own the code entirely. Annual maintenance covering bug fixes, small updates, and security patches typically runs $2,000–$5,000 per year for a system of this scope. There are no per-user fees, no add-on subscriptions, and no vendor controlling what you pay next year.
Four questions to answer before making this decision
The cost comparison tells you whether custom is cheaper. These questions tell you whether it is the right decision for your specific business situation.
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Quick answers to common questions about this topic.
How much does it cost to build a custom ERP system?+
A custom ERP for a small or mid-size business typically costs between $18,000 and $60,000 as a one-time build fee. A focused system covering inventory, purchase orders, sales orders,accounting, and reporting falls between $18,000 and $28,000. Adding HR, payroll, multi-warehouse support, or customer portals pushes the cost toward $35,000–$60,000. After delivery, ongoing maintenance runs $2,000–$5,000 per year.
What are the hidden costs of readymade ERP that businesses miss?+
The most commonly missed costs are: (1) implementation and setup fees ($15,000–$80,000); (2) an ERP administrator - internal at $55,000–$85,000/year or a consultant at $100–$250/hour; (3) add-on module fees; (4) annual price increases averaging 9–12% per year; (5) data migration costs; (6) productivity loss from workflow misfit.
Who owns the code?+
You do. 100%. Once the build is complete, we hand over the source code. You are never "locked in" to Coreway. You own the intellectual property, which adds real value to your business valuation.