Purpose
Produce a defensible, risk-adjusted synergy model for an M&A transaction — categorizing every cost and revenue synergy by type, sizing each with a stated methodology, weighting by realization probability, and phasing over a 36-month timeline net of one-time integration costs. Replaces the optimistic round-number synergy claims that don't survive diligence with a line-item model an analyst can defend to a board or investment committee.
When to Use
Invoke this skill when the user asks to:
- Quantify cost and revenue synergies for a proposed acquisition
- Build or pressure-test a synergy model for a deal in evaluation
- Justify or challenge a valuation premium based on synergy value
- Set integration targets and a realization timeline post-signing
- Compare gross synergy potential against risk-adjusted, achievable value
- Break a headline synergy number into auditable, categorized line items
Inputs Required
Before starting, collect:
- Acquirer profile: Revenue, headcount, key cost lines, and industry
- Target profile: Revenue, headcount, key cost lines, and geographic/product overlap with acquirer
- Deal size and structure: Purchase price, financing, and any stated synergy assumptions
- Overlap map: Where the two businesses share suppliers, functions, facilities, customers, or geographies
- Cost structure detail: Available splits of target (and acquirer) costs — COGS, SG&A, headcount by function, real estate footprint
- Integration constraints: Regulatory limits, union/contract obligations, retention concerns, or carve-out complexity
- Modeling horizon: Realization window (default 36 months) and discount rate (default 10%)
If cost splits are unavailable, apply industry-standard function ratios and flag every estimate as an assumption requiring diligence confirmation.
Instructions
Step 1: Baseline and Scope the Combined Entity
Establish the pre-synergy cost and revenue base:
- Combine acquirer and target revenue, COGS, and SG&A into a single baseline
- Identify the addressable base for each synergy type (e.g., combined procurement spend, overlapping headcount, redundant facilities)
- Flag any costs that are structurally protected (regulated, contractual, or retention-critical) and exclude them from synergy scope
- State the modeling horizon and discount rate up front
Step 2: Identify and Quantify Cost Synergies by Category
For each category, provide the addressable base, sizing methodology, gross annual run-rate value, and a confidence level (High / Medium / Low).
Category 1 — Procurement & Supplier Consolidation
- Addressable base: combined third-party spend where suppliers overlap or volume tiers can be renegotiated
- Methodology: apply a category savings rate (typically 3–8% on combined indirect spend, 2–5% on direct) to overlapping spend
- Higher confidence where both parties buy from the same suppliers or same categories
Category 2 — Headcount & Organizational Redundancy
- Addressable base: duplicated roles across corporate functions (finance, HR, IT, legal, marketing, executive)
- Methodology: estimate redundant FTEs by function × fully loaded cost per FTE; net of retention packages and severance (severance goes to one-time costs)
- Distinguish back-office redundancy (higher confidence) from front-line/revenue-generating roles (protect these)
Category 3 — Facilities & Real Estate
- Addressable base: overlapping offices, warehouses, plants, or data centers within the same geography
- Methodology: identify consolidatable sites × annual occupancy cost; account for lease break costs and relocation as one-time items
Category 4 — Technology & Systems
- Addressable base: duplicate software licenses, redundant infrastructure, and consolidatable platforms (ERP, CRM, HRIS)
- Methodology: license/subscription savings from consolidation + infrastructure decommissioning; migration and integration costs go to one-time items
Category 5 — G&A & Overhead
- Addressable base: duplicate corporate overhead — insurance, audit, board, public-company costs (if delisting), shared services
- Methodology: eliminate duplicate fixed overhead lines; public-company cost elimination is high-confidence where the target is going private
Step 3: Identify and Quantify Revenue Synergies by Category
Revenue synergies carry inherently lower confidence — weight accordingly and size conservatively.
Category 6 — Cross-Sell & Up-Sell
- Methodology: (acquirer customer base × target product attach rate × margin) + reverse direction; assume conservative attach rates (typically 2–10% of eligible base)
Category 7 — Pricing & Bundling
- Methodology: pricing power from reduced competition or bundled offering × applicable revenue base; flag antitrust sensitivity
Category 8 — Geographic & Channel Expansion
- Methodology: target's product sold through acquirer's channels/geographies (or vice versa) × realistic penetration ramp
Step 4: Apply Risk-Adjusted Probability Weights
Assign a realization probability to each line item and compute risk-adjusted value:
- Cost synergies: procurement/G&A 80–95%; headcount 70–90%; facilities/technology 60–80%
- Revenue synergies: 30–60% — never model revenue synergies at full value
- Risk-adjusted value = gross annual value × probability weight
- State a single blended realization percentage across the whole model
Step 5: Phase the Realization Timeline
Distribute each risk-adjusted synergy across the horizon (default months 0–12, 13–24, 25–36):
- Quick wins first: procurement renegotiation, duplicate license elimination, public-company cost removal
- Headcount typically phases over 6–18 months (notice periods, transition, backfill risk)
- Facilities consolidation phases over 12–36 months (lease terms, physical moves)
- Revenue synergies ramp slowly — minimal in year 1, building through year 3
- Show the run-rate exit velocity at month 36 vs. cumulative realized value
Step 6: Net Out One-Time Costs to Realize
Every synergy has a cost of achievement. Quantify:
- Severance and retention packages
- Lease break fees and relocation costs
- System migration, integration, and consulting spend
- Rebranding, contract renegotiation, and legal costs
- Present the cost-to-achieve ratio (one-time costs ÷ annual run-rate synergies)
Step 7: Synthesize into a Defensible Summary
- Gross annual run-rate synergies (by cost vs. revenue)
- Risk-adjusted annual run-rate synergies
- Net cumulative value over the horizon, less one-time costs
- NPV of the synergy stream at the stated discount rate
- Implied synergy value as a percentage of purchase price
- The top 3 execution risks that would most damage the model if they miss
Output Format
- Structure: Executive summary → categorized synergy tables (8 categories) → probability-weighting table → phased realization timeline → one-time cost schedule → NPV synthesis and risk callouts
- Length: 1,200–1,600 words plus tables
- Format: Structured document with quantified tables — one row per synergy line item showing addressable base, methodology, gross value, probability, risk-adjusted value, and phasing
- Sections: Baseline & scope → Cost synergies (5 categories) → Revenue synergies (3 categories) → Probability weighting → Realization timeline → One-time costs → NPV synthesis & top risks
- Tone: Corporate development analyst — quantitative, conservative, diligence-ready; every number traceable to a stated methodology
Quality Checklist
Before delivering output, verify:
- [ ] All 8 synergy categories are addressed (5 cost, 3 revenue) — none skipped even if valued at zero
- [ ] Every synergy line item shows an addressable base and a sizing methodology — no unsupported round numbers
- [ ] Revenue synergies are probability-weighted below 60% and separated from cost synergies
- [ ] One-time costs are netted out and the cost-to-achieve ratio is stated
- [ ] The realization timeline phases each synergy across the horizon rather than assuming full year-1 capture
- [ ] The synthesis reports both gross and risk-adjusted run-rate, synergy NPV, and synergy value as a percentage of purchase price
Notes
- The most common modeling error is booking revenue synergies at cost-synergy confidence levels — discount them hard, and be prepared to defend a deal on cost synergies alone
- Headcount and procurement synergies are where diligence teams find the most inflation — cross-check FTE counts against actual org charts and spend against actual supplier data
- A synergy is not real until someone owns it with a date attached; frame the timeline so integration leads can convert each line into a workstream with an accountable owner
- If synergy NPV exceeds 30–40% of purchase price, treat the model as aggressive and re-examine the probability weights before presenting to an investment committee
How to use this skill
This file is a Claude Code skill in Anthropic's standard format — markdown with YAML frontmatter at the top.
Installing in Claude Code:
~/.claude/skills/<folder-name>/SKILL.md— auto-loads in every session anywhere on your machine (recommended for skills you'll use across multiple projects)<your-project>/.claude/skills/<folder-name>/SKILL.md— auto-loads only when working in that project (recommended for project-specific skills)
Restart Claude Code or open a new session to register.
Using in Claude.ai, ChatGPT, Gemini, or other AI tools:
- Drag this file into a new chat, or copy and paste its contents
- Send your task or request as your next message — the AI will apply the skill where it fits
For Claude Code skill details: https://docs.anthropic.com/en/docs/claude-code/skills