SAP ECC 2027: The 12-Month Action Plan for Enterprises Still Running On-Premise ERP

Only 39% of SAP ECC customers have bought S/4HANA licences. If you're in the 61%, here's what the next 12 months need to look like.

SAP's mainstream maintenance deadline for ECC is December 31, 2027. That's just 21 months away. If your enterprise is still running on-premise SAP ECC without a clear migration path, you're not alone—but you're running out of time. More critically, you're about to enter SAP's sales machine at precisely the moment when you have the least negotiating power.

This article is a forensic action plan, month by month, for what you need to do between now and January 2028. It's built on one principle: buy-side advocacy. SAP wants you panicked. Your job is to be prepared.

The Current Landscape: Why 61% of ECC Customers Haven't Moved

SAP's own disclosures show that 61% of active ECC customers have not yet purchased S/4HANA licenses. That's not procrastination—that's cost avoidance. Moving from ECC to SAP's modern suite involves three massive decisions:

• Stay on-premise or move cloud? S/4HANA on-premise, RISE with SAP (managed cloud), or GROW with SAP (SMB cloud)?
• When do we migrate? Before support ends, or negotiate extended maintenance first?
• How much will it cost? Licensing, infrastructure, implementation—and what's negotiable?

Right now, SAP's sales team is weaponizing deadline pressure. They're calling customers, mentioning December 2027, and implying that migration timelines are fixed. They're not. What's fixed is the date. Everything else—including what you pay—is negotiable if you move first.

Months 1–2: License Position Assessment and ELP Baselining

What You Need to Do

Before you talk to anyone at SAP, you need to know exactly what you own, what you're using, and what you'll need to support your business after migration. This is not theoretical. This is forensic.

• SAP License Optimization (LO) baseline: Run a full LO assessment now. SAP's own tools will show you named users, usage patterns, modules, and feature codes. Document everything. This is your anchor point for negotiation later.
• Named user vs. concurrent user analysis: ECC often runs on concurrent user models. S/4HANA predominantly uses named users. If you have 500 concurrent ECC users, you might need 2,000+ named users for S/4HANA. That's a $2-4M licensing jump on its own.
• User access control (UAC) and indirect access audit: Have you measured indirect access? How many users access SAP through third-party tools, APIs, or reporting systems? SAP's indirect access licensing can cost 2–3x your direct user base. Know this number before SAP's auditors find it.
• Module and feature inventory: Which SAP modules are you actually using in ECC? Production Planning? Quality Management? Asset Management? Many enterprises license modules they've never fully deployed. Document what you're paying for today.

This phase is internal discipline. Hire independent SAP licensing experts if needed. Your CFO and SAP operations team need to agree on what your baseline actually is.

Months 3–4: Evaluate Migration Options

S/4HANA Cloud ERP Private (via RISE with SAP)

RISE is SAP's strategic cloud offering—S/4HANA on SAP's managed infrastructure, your choice of AWS, Azure, or Google Cloud. SAP controls the contract, prices the entire stack (licensing + infrastructure), and you have limited exit flexibility. Cost: typically $2–5M annually depending on scale. Good if you want to outsource operational ownership. Bad if you want commercial negotiating power.

GROW with SAP

SAP's entry-level cloud ERP, designed for small to mid-market companies. Limited customization. Simpler licensing. If you're under $1B revenue and your ECC footprint is <500 users, this might be a conversation. Otherwise, skip it for enterprise migration.

S/4HANA On-Premise

You own the infrastructure, control the deployment, negotiate the licenses directly. Higher capital investment upfront (servers, storage, networking). You manage support separately from infrastructure. Licensing is where you can push back—annual subscriptions start around $1–2M for a mid-sized enterprise but are deeply negotiable. This is where most large enterprises should focus. You maintain SAP contract negotiation leverage.

Third-Party Alternatives

Oracle Cloud ERP (formerly NetSuite plus Fusion), Infor CloudSuite, Microsoft Dynamics 365. If you're considering these, SAP knows. Use this as explicit negotiating pressure in Months 5–6. Even if you don't seriously move to Oracle, SAP's fear of it will discount your S/4HANA deal by 15–25%.

Deliverable for this phase: A three-option business case (Option A: RISE, Option B: S/4HANA on-premise, Option C: Oracle). You don't need to prefer any one yet. You need to prove you've modeled the choice.

Months 5–6: Engage SAP Commercially—Before They Engage You

Why Timing Matters

SAP's fiscal year runs April–March. Q4 2026 (January–March 2027) is SAP's last push to book cloud deals before their fiscal year ends. This is your optimal negotiating window. If you initiate serious contract discussions by May or June 2026, you have eight months of runway before SAP's internal deadline pressure intensifies.

How to Approach SAP

Don't request a contract review yet. Request a technical suitability assessment and commercial options briefing. Ask SAP to model:

• Licensing costs for S/4HANA on-premise vs. RISE
• Typical migration timelines and implementation costs (third-party estimate, not SAP's)
• Upgrade pricing from your current ECC contracts
• Extended maintenance availability and cost if you defer

During this phase, introduce your alternative scenarios. Tell SAP you're evaluating Oracle and/or planning an on-premise deployment. Don't decide yet—just let them know you're serious about options. This plants the seed: if your pricing isn't competitive, you have an exit.

Critical move: Engage a neutral third party (us, or another independent advisor) to run preliminary negotiations in parallel. SAP expects you to negotiate alone. They're prepared for that. They're less prepared for a buyer-side expert who knows their playbook.

Months 7–8: Extended Maintenance Options

SAP Standard Extended Maintenance

SAP offers paid extended maintenance beyond December 2027. It's expensive—typically 100% of your annual maintenance fee annually—but it buys you time. This is valuable. If your migration project will run into 2028, extended maintenance costs $500K–$2M but lets you stay on ECC longer without penalty.

Third-Party Extended Maintenance (Rimini Street, Spinnaker, etc.)

Rimini Street and Spinnaker Software offer post-mainstream-support maintenance on ECC at 40–50% of SAP's standard fees. This is a genuine alternative. It signals to SAP: if your migration path is expensive, we'll just run ECC longer on cheaper maintenance. That threat is worth 10–15% off S/4HANA migration pricing alone.

What you're doing in Months 7–8: Preparing a tactical decision. You're not committing to extended maintenance yet. You're proving SAP that if their migration offer isn't compelling, you have a legitimate cost-effective alternative. Use this data in your formal negotiation.

Months 9–10: Contract Negotiation and Deal Structure

What's Negotiable

• License volume: SAP typically wants you to license all your ECC users as named users on S/4HANA, even if you rationalize during migration. Push back. Propose a phased user enablement model. You license the core team first, add users as they adopt the system.
• Upgrade pricing: ECC customers get pricing discounts off standard S/4HANA rates. Standard discount is 15–25%. With competitive pressure, push to 35–40%.
• Maintenance pricing: S/4HANA subscription maintenance is typically 17–22% of license value annually. Negotiate to 12–15% for your first three years. You're giving SAP a committed multi-year deal; you deserve a discount.
• Implementation support: SAP will want to include their Global Services or Premium Success teams. Negotiate a cap on billable hours, or bring in a third-party SI (Deloitte, Accenture, etc.) who can manage the delivery while you manage SAP's license.
• Exit clauses: If you're going on-premise, negotiate the right to move to RISE later without renegotiating licenses. If you're on RISE, get a clause that lets you leave RISE without massive penalties after Year 3.

Use the Oracle threat explicitly. If SAP's pricing on S/4HANA is above $3M annually for a mid-market enterprise, tell them you're moving Oracle conversations forward. SAP will respond with better terms.

Deal Structure

Push for a three-year contract with optional extension, not a five-year commitment. SAP wants long-term bookings. You want flexibility. Agree to longer contracts only if the per-year cost drops materially (5–10% savings for each additional year).

Months 11–12: Migration Execution Preparation

By November 2026, you should have a signed S/4HANA or extended-maintenance contract. Now comes execution.

• Implementation partner selection: Choose based on methodology fit and your industry, not on SAP's preference. A Deloitte deal will be more expensive but more independent than SAP Services.
• Technical cutover planning: Run detailed migration scenarios. Data conversion, legacy system decommissioning, parallel run windows. Plan for a 4–6 month data stabilization period post-go-live.
• Training and change management: This is where most migrations fail—not in technology, but in user adoption. Budget 15–20% of your implementation cost for training and change management.
• Post-go-live support: Negotiate a 90-day hypercare period with your implementation partner. SAP will want you to move to their Premium Success model post-hypercare. Negotiate a capped fee (typically $200–400K annually for mid-market enterprises).

What SAP's Sales Team Is Doing Right Now

Understand the playbook. SAP is:

• Calling accounts and mentioning December 2027 to create urgency. This is intentional deadline pressure.
• Offering "upgrade paths" and "migration programs" that lock you into RISE or S/4HANA without competitive bids.
• Bundling services, licensing, and infrastructure in opaque contracts so you can't benchmark components separately.
• Emphasizing implementation speed to make you think migration is simpler than it is, so you don't plan for extended negotiations.
• Using "standard" pricing as anchors—claiming all ECC customers move to S/4HANA with similar licensing. This is false. Every deal is negotiable.

Counter-move: If you've followed this plan, you have leverage. You've baselined your licenses, modeled alternatives, and built a competitive narrative before SAP owns your timeline.

The Negotiation Window: Why Q4 2026 Matters

SAP's fiscal Q4 runs January–March 2027. By December 2026, SAP's sales teams are desperate to close cloud deals before their fiscal year ends (March 31, 2027). This is when SAP will give you the best terms. If you wait until June 2027 to negotiate, SAP's new fiscal year has started, and they're less hungry.

Plan your contract signature for January–February 2027. You'll get 20–30% better pricing than if you negotiate in May 2027.

Final Thoughts: Control Your Timeline

December 2027 is SAP's deadline, not yours. If you execute this plan, you'll:

• Know your baseline licensing position (Months 1–2)
• Have modeled your options (Months 3–4)
• Have SAP competing for your business (Months 5–6)
• Have positioned extended maintenance as a credible backup (Months 7–8)
• Have negotiated a competitive deal during SAP's fiscal Q4 (Months 9–10)
• Be executing, not panicking (Months 11–12)

The 61% of ECC customers who haven't moved yet aren't lazy. They're waiting for SAP to panic. Let them panic. You'll be bargaining from strength.

Related Resources

• SAP ECC End-of-Maintenance 2027: What It Means for Your Licensing
• RISE with SAP Hidden Costs: What SAP Doesn't Disclose
• SAP Contract Negotiation Services
• All Services
• SAP Licensing Experts Home