Your ECC Runs Out of Support in 2027. We'll Get You There.

SAP Business Suite 7 (which includes SAP ECC 6.0) reaches end of mainstream maintenance on December 31, 2027. After that date, SAP no longer ships standard patches, fixes, regulatory updates, or new feature delivery against ECC; security patches stop on the standard track. SAP offers an optional Extended Maintenance window running through December 31, 2030 at a premium (typically a 2% surcharge on annual maintenance fees), and SAP's CEO has publicly confirmed there will be no further extensions beyond 2030. After 2030, ECC enters Customer-Specific Maintenance — which in practice means the customer is responsible for keeping it running, with no SAP-supplied patches or fixes available at all. For most ECC customers, the planning runway from today (2026) to genuine deadline (2027 or 2030 with extension) is 12–48 months — enough to migrate properly if work starts now, not enough if it does not.

Four. First, buy the Extended Maintenance to 2030 — the additional surcharge buys three more years of standard SAP-supplied patching while you stay on self-hosted ECC, which is usually the cheapest insurance you can buy if migration genuinely cannot complete in the remaining window. Second, move your existing ECC system to RISE with SAP private cloud infrastructure — ECC on RISE — which gets you off self-hosted ECC and onto SAP-managed cloud without yet doing the S/4HANA conversion, buying you operational stability and a single SAP commercial relationship while you plan the S/4HANA transition over a longer horizon. Third, migrate to S/4HANA Cloud, Private Edition via RISE before the deadline using a brownfield system conversion (the fastest S/4HANA path; carries forward custom code and master data so the migration itself can complete in 9–18 months for typical landscapes, 4 months for outliers like the iFIT public reference). Fourth, go to S/4HANA Cloud, Public Edition via GROW with SAP as a greenfield re-implementation — only viable if the business is willing to adopt SAP best practices rather than carry forward legacy customisations. The wrong move is to do nothing through 2027 and then run a forced migration into a missed deadline — that compresses the timeline at exactly the moment partners and SAP resources are most constrained.

For most existing ECC customers, RISE with SAP is the primary path forward — and RISE actually offers two routes, both relevant to ECC organisations. ECC on RISE keeps your existing ECC system running on SAP-managed private cloud infrastructure (gets you off self-hosted ECC, single SAP commercial relationship, defers the S/4HANA conversion); S/4HANA Cloud Private Edition via RISE is the conversion path itself, through brownfield system conversion or bluefield selective transition, and preserves the ability to carry forward custom code, configuration, master data, and history. Many customers stage the journey: ECC on RISE first to stabilise operations and exit self-hosting, then S/4HANA Private Edition on RISE within the same commercial envelope when the business is ready. GROW with SAP (S/4HANA Cloud, Public Edition) is a different product entirely — greenfield re-implementation, multi-tenant, clean core, standardised processes, no carry-forward of custom code. GROW from ECC is viable only when the business is genuinely willing to adopt SAP best practices and let go of legacy customisation, and even then the change-management and data-migration scope is large. DEBCOR's standard ECC decision pattern is landscape analysis first, then honest path recommendation across all three options — not which path the SI you talked to last is set up to deliver.

Three buckets: retire, remediate, or move to BTP. The first step is classification — every Z-program, user exit, and enhancement catalogued and evaluated against current usage and business value. DEBCOR's AI-accelerated custom-code classification typically completes in weeks, not months (85% of discovery on a confidential aerospace and defense engagement, 2025–2026). Code that is unused or duplicates standard S/4HANA functionality is retired — many ECC landscapes turn out to be 30–50% retirable, which is the single biggest scope reduction available. Code that delivers real business value but breaks on S/4HANA is remediated by senior engineers (data types, API changes, deprecated function modules). Code that should logically be extensibility rather than core modification is moved to BTP as a side-by-side app — clean core, future-proof, AI-ready. The honest answer is: skipping this classification step is what turns 12-month migrations into 24-month migrations. See the Custom Code Remediation page for the full process.

Realistic ranges vary by landscape, but typical enterprise ECC-to-S/4HANA Private Cloud migrations (via RISE, brownfield, mid-complexity) land between USD $1M and $5M for partner delivery, plus SAP licence costs in the RISE subscription (which replaces the existing ECC perpetual licence and annual maintenance over the contract term). Greenfield programmes via GROW are generally lower on partner delivery but higher on change-management scope. Costs scale with: landscape complexity (number of company codes, countries, currencies), custom-code volume (the single biggest cost driver), data-migration scope, integration count (especially if PI/PO is also moving to Integration Suite), and parallel-run requirements. DEBCOR's standard practice is a landscape assessment first ($25k–$75k, two to three weeks) that produces an honest scope estimate before any fixed-bid programme is quoted. The cost of skipping the assessment is overspend on the migration itself — usually much more than the assessment.

Five dimensions, all surfaced before any path recommendation is made. First, the landscape inventory: every Z-program, user exit, enhancement, custom table, modification, and core integration catalogued (AI-accelerated; typical 85% completion in weeks). Second, the data-quality baseline: master data condition for materials, customers, vendors, and pricing conditions, with cleansing scope estimated for migration load-rate planning. Third, the integration map: every interface — including PI/PO interfaces that will need to migrate to Integration Suite — documented with current owner, business criticality, and target architecture. Fourth, the user-and-process map: which business processes are still on standard, which have been heavily customised, which have parallel manual workarounds the project should reconsider. Fifth, the timeline and budget reality check: what is honestly achievable in the remaining ECC support window, and what trade-offs (extended maintenance, scope-staging, greenfield vs brownfield) the leadership team will need to decide. The output is a one-document executive read on where the organisation stands — not a sales pitch.