When is SAP Business One the right choice anyway?

Three cases. (1) Parent company or key customers already run SAP and consolidated financial reporting into SAP S/4HANA is required. (2) Multi-country operations (DE, AT, CH, IT) where SAP B1 localisations are off the shelf. (3) 100+ employee complex manufacturing SME working on standard finance-logistics processes that does not want custom development. For Hungarian 20-80 person SMEs with Hungarian tax, Hungarian logistics: a custom ERP at 15-35 million HUF initial + 2.5-6 million HUF/year is almost always cheaper on 5-year TCO.

How does the custom ERP NAV Online Számla 3.0 integration work?

In the custom ERP, NAV Online Számla 3.0 XML reporting is native. On invoicing, the system POSTs to the NAV API in 3.0 schema (mandatory since 2024), manages the technical-user token, alerts on failed reports. Számlázz.hu or Billingo are optional backup pipelines. NAV schema updates are in the maintenance fee (0.5-1.5 million HUF/year for custom CRM, 2.5-6 million HUF/year for custom ERP). With SAP B1 Hungarian Localization partner module, schema updates land 4-8 weeks behind.

How long does a custom ERP rollout take vs SAP B1?

AppForge custom ERP timeline for a 30-80 person Hungarian SME: 4-7 months to go-live, 15-35 million HUF fixed price. SAP Business One Cloud rollout (via partner VAR): 4-8 months, similar bracket initial licence + 8-25 million HUF Y1 implementation + monthly licence for 5 years. With a custom ERP the entire source code is yours (source-code escrow option), no vendor lock-in, and Hungarian-market processes (NAV, KSH, KATA / KIVA / TAO options) are in from Y1. Exact quote after a 30-min scoping call.

What if we outgrow the custom ERP?

Two typical scenarios. (1) Company grows to 80-200 staff and we scale the custom ERP (new modules, more users, multi-entity structure). Add-on projects, 5-15 million HUF/year band. (2) Company goes multinational or joins a SAP-running parent and must migrate to S/4HANA. Custom ERP is built on a REST/OAuth2 API; data migration uses SAP Migration Cockpit (LTMC), typically 3-5 month project. The 5 years of saved licence fees more than cover such a migration if it ever becomes necessary.

How does NIS2 affect the ERP choice?

NIS2 Directive (EU 2022/2555) and the Hungarian Act LXIX of 2024 introduce 'important' and 'essential' entity classifications. An ERP is a business-critical information system, so NIS2 Article 21 (risk management) and Article 23 (incident reporting) apply. SAP B1 cloud is a shared-responsibility model — the deployer is responsible for data classification, access management, audit log, BC/DR. Custom ERP keeps these on infrastructure you control — easier to document and audit. NIS2 checklist at /en/nis2-checklist-for-it-leaders/.

SAP B1 cloud · 47-91 EUR/user/mo · 2026

SAP Business One alternative for SMEs — custom ERP 15-35M HUF fixed price

SAP Business One cloud subscription 47-91 EUR/user/month (ERP Research 2025-2026). For a 30-user company over 5 years, that is 84,600-163,800 EUR in licences plus 8-25M HUF VAR implementation. Custom ERP 15-35M HUF initial + 2.5-6M HUF/year, with native NAV Online Számla 3.0 integration aligned to the Hungarian Accounting Act (Sztv.).

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TL;DR

SAP B1 cloud, 30 users, 5 years, licence only: 84,600-163,800 EUR. Custom ERP 5-year TCO: 15-35M HUF + 2.5-6M HUF/yr × 5 = 27.5-65M HUF (≈ €71k-€167k).
SAP B1 Hungarian Localization (NAV module) is a partner add-on with 4-8 weeks lag after NAV schema updates.
In a custom ERP, NAV Online Számla 3.0 is native, in the fixed price, with monthly maintenance tracking schema changes.
Break-even: SAP-running parent or 5+ country consolidation favours SAP B1. Hungary-only SMEs almost always win with custom ERP.
Sources: erpresearch.com SAP B1 pricing breakdown, appforge.hu/en/pricing.

5-year TCO comparison — 30-user Hungarian SME

The SAP B1 cloud subscription 47-91 EUR/user/month band is from the ERP Research 2025-2026 public pricing analysis. AppForge bands from public/pricing.md.

Line	SAP Business One Cloud	AppForge custom ERP
Per-user/month	47-91 EUR	0 EUR
5 yr × 30 user licence	47-91 × 30 × 60 = 84,600-163,800 EUR	—
VAR implementation (Y1)	8-25M HUF (~€21k-€64k)	15-35M HUF (~€39k-€90k)
Hungarian Localization add-on	~30-100 USD/user/mo	in the fixed price
Annual maintenance	~15-25% ARR	2.5-6M HUF/yr
5-yr all-in TCO	~€140k-€280k+	27.5-65M HUF (≈ €71k-€167k)

Add-on caveat: SAP B1 Advanced (production planning, MRP), SAP HANA edition, B1 Service Layer extras; SAP Crystal Reports add-on; SAP Business One Mobile licence separately. The bands above exclude these.

Feature parity — Hungarian-market context

Custom ERP — native

· NAV Online Számla 3.0 XML POST in the fixed price
· KSH (statistics) reporting in Hungarian breakdown
· EKAER integration (road freight)
· KATA / KIVA / TAO accounting options
· Hungarian Sztv. concepts (impairment, balance vouchers)
· Native Hungarian UX, Hungarian documentation
· Source-code escrow, on-prem deploy option
· No per-user licence fee

When SAP Business One IS the right answer

SAP B1 is the right call for roughly 20-25% of Hungarian SME buyers. Concrete conditions below.

SAP-running parent: consolidated financial reporting into SAP S/4HANA, with B1 as the subsidiaries' ERP.
Multi-country (DE, AT, CH, IT): B1 localisations off the shelf, expensive to replicate in custom ERP.
100+ employees, standard processes: manufacturing SME on standard finance and logistics, no customisation needs.
Complex multi-currency, multi-entity: SAP B1 Intercompany Integration Framework comes ready.

For 20-80 person Hungarian SMEs with Hungarian tax, EU-only data flow, custom ERP almost always wins on 5-year TCO.

SAP B1 migration — 5-step plan

Typical 30-100 seat deployment: 10-14 weeks parallel run. Migration fee 5-10M HUF on top of the 15-35M HUF custom ERP project.

Wk 1-2: Discovery + DI API audit
SAP B1 DI (Data Interface) API + Service Layer (REST) inventory, master data and transactional table mapping.
Wk 3-4: Master data export (BP, Item, Account)
Business Partner, Item, Chart of Accounts, Warehouse, Tax Code, Currency. CSV / JSON export via Service Layer.
Wk 5-7: 3-5 years history transactions
AR Invoice, AP Invoice, Goods Receipt, Goods Issue, Inventory Transfer, Journal Entry full history. Imported into Postgres.
Wk 8-11: Custom ERP build + UAT
AppForge custom ERP modules (Sales, Purchase, Inventory, Finance, NAV integration), Hungarian Sztv. validation, accountant review.
Wk 12-14: Cutover + dual-run + 60-day backup
Go-live, SAP B1 stays read-only for 60 days, daily reconciliation, then licence cancellation.

AppForge price — custom ERP, fixed

Bands below are exact from public/pricing.md. Exact quote after a 30-minute scoping call.

· Custom ERP: 15-35M HUF initial (≈ €39k-€90k) + 2.5-6M HUF/year maintenance
· Time to deploy: 4-7 months to go-live
· NAV Online Számla 3.0, KSH, EKAER: in the fixed price
· SAP B1 migration project: 5-10M HUF separate (10-14 weeks)
· Source-code escrow: 0.5M HUF/year or one-time handover

Talk in person at our office

With a €100k+ 5-year SAP B1 decision on the table, a 30-minute scoping call always pays back. Call us at +36 30 098 0767, email balint@appforge.hu, or come in person.

Budapest office: 1054 Budapest, Szabadság tér 7. (Bank Center), 1st floor office 112 · Mon-Fri 09:00-18:00 by appointment.

Sources

· ERP Research — SAP Business One pricing breakdown
· SAP Business One official product page
· AppForge pricing: appforge.hu/en/pricing

Last updated: 2026-05-04. Numbers are list prices; specific licence and implementation terms may be negotiated with SAP or a VAR.

GYIK

SAP Business One alternative — FAQ

Per ERP Research 2025-2026 data, SAP Business One cloud subscription is 47-91 EUR/user/month. For a 30-user company over 60 months that is 84,600-163,800 EUR for licences alone. On top: VAR (Value Added Reseller) implementation, typically 8-25 million HUF Y1 in the Hungarian market, plus monthly support. Hungarian Localization (NAV Online Számla 3.0 partner module) is a separate add-on, with 4-8 weeks lag after NAV schema updates. Source: erpresearch.com SAP B1 pricing breakdown.

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After the call we provide a concrete price and timeline for the custom ERP project and any SAP B1 migration.

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SAP Business One alternative for SMEs — custom ERP 15-35M HUF fixed price

TL;DR

5-year TCO comparison — 30-user Hungarian SME

Feature parity — Hungarian-market context

Custom ERP — native

SAP B1 — partner module / SDK

When SAP Business One IS the right answer

SAP B1 migration — 5-step plan

AppForge price — custom ERP, fixed

Talk in person at our office

SAP Business One alternative — FAQ

Related topics

Custom ERP development

Process automation

System integration

WMS warehouse management

NIS2 checklist

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