building-merger-models

name	building-merger-models
description	Constructs merger consequence analysis with accretion/dilution, pro forma financials, and synergy assumptions. Use when modeling mergers, calculating accretion/dilution, or analyzing deal structures.
tags	["modeling","investment-banking"]
metadata	{"author":"casemark","practice_areas":["Investment Banking","Mergers and Acquisitions","Corporate Finance"],"document_types":["Model"],"skill_modes":["Modeling"]}

Building Merger Models

When To Use

• Evaluating whether a proposed acquisition is accretive or dilutive to the acquirer's EPS
• Building pro forma combined financial statements for a merger transaction
• Stress-testing deal structures across varying consideration mixes (cash, stock, mixed)
• Quantifying synergy assumptions (revenue and cost) and their impact on deal economics
• Comparing multiple deal scenarios (e.g., different offer prices, financing structures, or synergy ramp schedules)

Inputs To Gather

• Acquirer financials: Latest annual and interim income statement, balance sheet, share count (basic and diluted), current stock price, existing debt schedule
• Target financials: Same as acquirer; also any available management projections or consensus estimates
• Deal terms: Offer price per share (or total equity value), consideration mix (% cash / % stock), expected close date, breakup fee, collar provisions if any
• Financing assumptions: New debt tranches (amount, rate, tenor), cash on hand used, any equity issuance beyond stock consideration
• Synergy estimates: Cost synergies (headcount, facilities, procurement) with phase-in timeline; revenue synergies if modeled, with probability weighting
• Transaction costs: Advisory fees, financing fees, integration costs, severance/restructuring charges
• Tax rates: Acquirer and target marginal rates, any step-up or NOL considerations [VERIFY jurisdiction-specific tax treatment]

Workflow

1. Set up standalone models

   • Build or import acquirer and target income statements on a consistent fiscal-year basis
   • Calendarize target financials if fiscal year-ends differ
   • Confirm diluted share counts and current EPS for the acquirer as the baseline

2. Model the transaction structure

   • Calculate total consideration: offer price x target diluted shares
   • Allocate between cash and stock; compute new shares issued to target shareholders
   • Determine goodwill and intangible asset write-ups using purchase price allocation (fair value of net assets vs. purchase price)
   • Build the sources & uses table: equity issued, new debt raised, cash from balance sheet, fees

3. Construct pro forma adjustments

   • Add new interest expense on acquisition debt (net of tax)
   • Remove target's existing interest expense if debt is retired at close
   • Add D&A from intangible asset write-ups (customer relationships, technology, trade names) with appropriate amortization schedules
   • Layer in synergies on the phase-in schedule (e.g., 25% Year 1, 75% Year 2, 100% Year 3)
   • Back out one-time transaction and integration costs in the relevant periods
   • Adjust share count for new shares issued; apply treasury stock method for any options/convertibles

4. Calculate accretion / dilution

   • Pro forma combined EPS = (Acquirer net income + Target net income + synergies - incremental interest - incremental D&A) / pro forma diluted shares
   • Compare to standalone acquirer EPS; express as % accretive or dilutive
   • Show Year 1, Year 2, and Year 3 to capture synergy ramp

5. Run sensitivity analysis

   • Offer price vs. accretion/dilution (price sensitivity table)
   • Consideration mix (all-cash, all-stock, 50/50) impact on EPS and leverage
   • Synergy achievement rate (50%, 75%, 100%) vs. accretion breakeven
   • Interest rate sensitivity on floating-rate acquisition debt
   • Create a football-field-style summary showing accretion/dilution across scenarios

6. Build credit and returns checks

   • Pro forma leverage (Net Debt / EBITDA) vs. acquirer's target or rating threshold
   • Interest coverage ratio (EBITDA / Interest) post-deal
   • IRR to acquirer at various exit multiples (if PE-backed or strategic with exit horizon)

Output

• Sources & Uses table: Clear breakdown of deal financing
• Pro forma income statement: Combined P&L with line-item adjustments labeled
• Accretion/dilution summary: Year 1-3 EPS impact in dollars and percentage terms
• Sensitivity tables: At minimum, offer price vs. accretion and synergy achievement vs. accretion
• Key assumptions page: All inputs, synergy estimates, and financing terms in one reference sheet
• Credit metrics: Pro forma leverage and coverage ratios

Quality Checks

• Accretion/dilution output ties to the difference between pro forma EPS and standalone acquirer EPS — cross-check arithmetic
• Sources & uses balance exactly (total sources = total uses)
• Goodwill = purchase price - fair value of net tangible and identifiable intangible assets [VERIFY purchase price allocation assumptions]
• New shares issued = stock consideration / acquirer share price — confirm this flows through to diluted share count
• Interest expense ties to debt schedule (principal x rate); verify pre-tax vs. after-tax treatment
• Synergies phase in over the correct timeline and are excluded from Year 0 / close-date calculations
• Tax rate applied to pre-tax synergies and interest adjustments is consistent with the stated marginal rate [VERIFY if deal creates NOL or changes tax jurisdiction]
• Pro forma leverage ratios are computed on the same EBITDA definition (with or without synergies) disclosed to the user
• No circular references between interest income on cash and net income if cash sweeps are modeled